diff --git a/app/build.gradle b/app/build.gradle
index c7f4988d7d02afad0c90f22ba9cf4b795ee1edf0..2bb46621ce14c8cc44925a9eb23e5e79fd547f7e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -10,6 +10,9 @@ android {
         targetSdkVersion target_sdk_version
         versionCode version_code
         versionName version_name
+        dataBinding {
+            enabled = true
+        }
     }
 
     if (signPropertiesFile.exists()) {
@@ -57,7 +60,7 @@ dependencies {
     // LeakCanary
     debugImplementation "com.squareup.leakcanary:leakcanary-android:$leakcanary_version"
     releaseImplementation "com.squareup.leakcanary:leakcanary-android-no-op:$leakcanary_version"
-//    implementation 'com.blankj:utilcode:1.13.9'
+//    implementation 'com.blankj:utilcode:1.13.10'
 }
 
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/MainActivity.java b/app/src/main/java/com/blankj/androidutilcode/MainActivity.java
index abc7a2e12e8232da82bd97a37808c861a0e9fd25..b5f13bb54e7cca27c8550836e6565d9cef572dca 100644
--- a/app/src/main/java/com/blankj/androidutilcode/MainActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/MainActivity.java
@@ -2,6 +2,7 @@ package com.blankj.androidutilcode;
 
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.design.widget.CollapsingToolbarLayout;
 import android.support.v7.app.ActionBarDrawerToggle;
 import android.support.v7.widget.Toolbar;
@@ -23,7 +24,7 @@ import com.blankj.utilcode.util.BarUtils;
 public class MainActivity extends BaseDrawerActivity {
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/BaseActivity.java b/app/src/main/java/com/blankj/androidutilcode/base/BaseActivity.java
index d356e1aaacac23408e6b8a5853e73d5fae59d186..9aa8d6d6bd8b6c773472aa8539ead6215b9837b3 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/BaseActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/BaseActivity.java
@@ -18,31 +18,30 @@ import android.view.View;
 public abstract class BaseActivity extends AppCompatActivity
         implements IBaseView {
 
-    /**
-     * 当前 Activity 渲染的视图 View
-     */
-    protected View contentView;
+    protected View     mContentView;
+    protected Activity mActivity;
+
     /**
      * 上次点击时间
      */
     private long lastClick = 0;
 
-    protected Activity mActivity;
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mActivity = this;
         Bundle bundle = getIntent().getExtras();
-        initData(bundle);
+        if (bundle != null) {
+            initData(bundle);
+        }
         setBaseView(bindLayout());
-        initView(savedInstanceState, contentView);
+        initView(savedInstanceState, mContentView);
         doBusiness();
     }
 
     protected void setBaseView(@LayoutRes int layoutId) {
         if (layoutId <= 0) return;
-        setContentView(contentView = LayoutInflater.from(this).inflate(layoutId, null));
+        setContentView(mContentView = LayoutInflater.from(this).inflate(layoutId, null));
     }
 
     /**
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/BaseBackActivity.java b/app/src/main/java/com/blankj/androidutilcode/base/BaseBackActivity.java
index 8e9c13237e50af64b8427cf04b9386094c2629b9..855a62acc950db53639586f53cab49f2b268b9f3 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/BaseBackActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/BaseBackActivity.java
@@ -34,8 +34,8 @@ public abstract class BaseBackActivity extends BaseActivity {
     @Override
     protected void setBaseView(@LayoutRes int layoutId) {
         Slidr.attach(this);
-        contentView = LayoutInflater.from(this).inflate(R.layout.activity_back, null);
-        setContentView(contentView);
+        mContentView = LayoutInflater.from(this).inflate(R.layout.activity_back, null);
+        setContentView(mContentView);
         rootLayout = findViewById(R.id.root_layout);
         abl = findViewById(R.id.abl);
         mToolbar = findViewById(R.id.toolbar);
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/BaseDrawerActivity.java b/app/src/main/java/com/blankj/androidutilcode/base/BaseDrawerActivity.java
index 4a41e5ebfb979eb23922ab9764d41f1d8e4cc34b..a45800ce63933d9e580512d40a2f22efeb299660 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/BaseDrawerActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/BaseDrawerActivity.java
@@ -44,8 +44,8 @@ public abstract class BaseDrawerActivity extends BaseActivity {
 
     @Override
     protected void setBaseView(@LayoutRes int layoutId) {
-        contentView = LayoutInflater.from(this).inflate(R.layout.activity_drawer, null);
-        setContentView(contentView);
+        mContentView = LayoutInflater.from(this).inflate(R.layout.activity_drawer, null);
+        setContentView(mContentView);
         rootLayout = findViewById(R.id.root_layout);
         flActivityContainer = findViewById(R.id.activity_container);
         flActivityContainer.addView(LayoutInflater.from(this).inflate(layoutId, flActivityContainer, false));
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/BaseFragment.java b/app/src/main/java/com/blankj/androidutilcode/base/BaseFragment.java
index 564a3da91212ab192bef2b61c5c21b15a3aff678..12a79dd46879d8e554417c0c8073f4308c684888 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/BaseFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/BaseFragment.java
@@ -3,6 +3,8 @@ package com.blankj.androidutilcode.base;
 import android.app.Activity;
 import android.os.Bundle;
 import android.support.annotation.IdRes;
+import android.support.annotation.LayoutRes;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentTransaction;
@@ -25,7 +27,7 @@ public abstract class BaseFragment extends Fragment
     private static final String TAG                  = "BaseFragment";
     private static final String STATE_SAVE_IS_HIDDEN = "STATE_SAVE_IS_HIDDEN";
 
-    protected View     contentView;
+    protected View     mContentView;
     protected Activity mActivity;
 
     private long lastClick = 0;
@@ -48,34 +50,41 @@ public abstract class BaseFragment extends Fragment
 
     @Nullable
     @Override
-    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
         Log.d(TAG, "onCreateView: ");
-        contentView = inflater.inflate(bindLayout(), null);
-        return contentView;
+        setBaseView(inflater, bindLayout());
+        return mContentView;
+    }
+
+    protected void setBaseView(@NonNull LayoutInflater inflater, @LayoutRes int layoutId) {
+        if (layoutId <= 0) return;
+        mContentView = inflater.inflate(layoutId, null);
     }
 
     @Override
-    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
         Log.d(TAG, "onViewCreated: ");
         super.onViewCreated(view, savedInstanceState);
         Bundle bundle = getArguments();
-        initData(bundle);
+        if (bundle != null) {
+            initData(bundle);
+        }
     }
 
     @Override
-    public void onActivityCreated(Bundle savedInstanceState) {
+    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
         Log.d(TAG, "onActivityCreated: ");
         super.onActivityCreated(savedInstanceState);
-        mActivity = (BaseActivity) getActivity();
-        initView(savedInstanceState, contentView);
+        mActivity = getActivity();
+        initView(savedInstanceState, mContentView);
         doBusiness();
     }
 
     @Override
     public void onDestroyView() {
         Log.d(TAG, "onDestroyView: ");
-        if (contentView != null) {
-            ((ViewGroup) contentView.getParent()).removeView(contentView);
+        if (mContentView != null) {
+            ((ViewGroup) mContentView.getParent()).removeView(mContentView);
         }
         super.onDestroyView();
     }
@@ -87,7 +96,7 @@ public abstract class BaseFragment extends Fragment
     }
 
     @Override
-    public void onSaveInstanceState(Bundle outState) {
+    public void onSaveInstanceState(@NonNull Bundle outState) {
         Log.d(TAG, "onSaveInstanceState: ");
         super.onSaveInstanceState(outState);
         outState.putBoolean(STATE_SAVE_IS_HIDDEN, isHidden());
@@ -108,7 +117,7 @@ public abstract class BaseFragment extends Fragment
     }
 
     public <T extends View> T findViewById(@IdRes int id) {
-        if (contentView == null) throw new NullPointerException("ContentView is null.");
-        return contentView.findViewById(id);
+        if (mContentView == null) throw new NullPointerException("ContentView is null.");
+        return mContentView.findViewById(id);
     }
 }
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/BaseLazyFragment.java b/app/src/main/java/com/blankj/androidutilcode/base/BaseLazyFragment.java
index 49a6ec5306c96de36e3c0482e0084ec514518d9d..a6c7c1073429e87a478a83ec8878f90386fbf90a 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/BaseLazyFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/BaseLazyFragment.java
@@ -22,7 +22,7 @@ public abstract class BaseLazyFragment extends BaseFragment {
     public void setUserVisibleHint(boolean isVisibleToUser) {
         Log.d(TAG, "setUserVisibleHint: " + isVisibleToUser);
         super.setUserVisibleHint(isVisibleToUser);
-        if (isVisibleToUser && contentView != null && !isDataLoaded) {
+        if (isVisibleToUser && mContentView != null && !isDataLoaded) {
             doLazyBusiness();
             isDataLoaded = true;
         }
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/DataBindingActivity.java b/app/src/main/java/com/blankj/androidutilcode/base/DataBindingActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..39bad27a981a8de47c0118925f497cb97f57130a
--- /dev/null
+++ b/app/src/main/java/com/blankj/androidutilcode/base/DataBindingActivity.java
@@ -0,0 +1,14 @@
+package com.blankj.androidutilcode.base;
+
+/**
+ * <pre>
+ *     author: Blankj
+ *     blog  : http://blankj.com
+ *     time  : 2018/04/10
+ *     desc  :
+ * </pre>
+ */
+public abstract class DataBindingActivity extends BaseActivity {
+
+
+}
diff --git a/app/src/main/java/com/blankj/androidutilcode/base/IBaseView.java b/app/src/main/java/com/blankj/androidutilcode/base/IBaseView.java
index 261c0b3063a117382a720d9225cb533614c22255..5ff9c157d21e6a618cb55f129a568844e9845514 100644
--- a/app/src/main/java/com/blankj/androidutilcode/base/IBaseView.java
+++ b/app/src/main/java/com/blankj/androidutilcode/base/IBaseView.java
@@ -1,6 +1,7 @@
 package com.blankj.androidutilcode.base;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 
 /**
@@ -18,7 +19,7 @@ interface IBaseView extends View.OnClickListener {
      *
      * @param bundle 传递过来的 bundle
      */
-    void initData(final Bundle bundle);
+    void initData(@NonNull final Bundle bundle);
 
     /**
      * 绑定布局
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/CoreUtilActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/CoreUtilActivity.java
index a66a4307bc0774d7adb377cf2a25c86497b2f3fd..7cd11822ed9b4ba1e962def9567a0c487adcecbb 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/CoreUtilActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/CoreUtilActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 
 import com.blankj.androidutilcode.R;
@@ -44,7 +45,7 @@ public class CoreUtilActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/ActivityActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/ActivityActivity.java
index 205005afc99a9556f83bed66a3d48cae51da09ac..be11171a573d2579fcaa3df8176b156e62b003b2 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/ActivityActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/ActivityActivity.java
@@ -6,6 +6,7 @@ import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.ActivityOptionsCompat;
 import android.view.View;
 import android.view.Window;
@@ -45,7 +46,7 @@ public class ActivityActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/SubActivityActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/SubActivityActivity.java
index a3ec3bf34e746b5a5c537336940f789077f02cb9..942c25134d229b6003922068caeb59ba5fc291e2 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/SubActivityActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/activity/SubActivityActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.activity;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.ActivityCompat;
 import android.view.View;
 import android.view.Window;
@@ -25,7 +26,7 @@ public class SubActivityActivity extends BaseBackActivity {
     Random random = new Random();
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/app/AppActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/app/AppActivity.java
index fbc288cb226f3b872f6ea1c877e2d4d5d692cda9..0cfdb800a1891ee1e283d591ade35c7667ee7008 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/app/AppActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/app/AppActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.app;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -32,7 +33,7 @@ public class AppActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarActivity.java
index a9e50cceedde239d090499901f368afc1e779e3a..c9c972ef97b9bb47f76c9268541046c9a3c22001 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -27,7 +28,7 @@ public class BarActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNavActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNavActivity.java
index 27533f72f8fd6143075d91afb874526cf0becf95..ea5a5e70f303f35376cc156a45a104d2d8288fa3 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNavActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNavActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.widget.TextView;
@@ -31,7 +32,7 @@ public class BarNavActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNotificationActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNotificationActivity.java
index 2bbbcbb961a6ab45579581e1daecb657bfb3c29a..69af837de3e82273416bfeaf54b0fa2ad7782612 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNotificationActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarNotificationActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
+import android.support.annotation.NonNull;
 import android.view.View;
 
 import com.blankj.androidutilcode.R;
@@ -28,7 +29,7 @@ public class BarNotificationActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusActivity.java
index dd24d997ac77ca0c60b96c52747c0279c83d2b35..634f03e4b97d7faae3f4df580b5ad79728f1ed1f 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -29,7 +30,7 @@ public class BarStatusActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaActivity.java
index 7aa3da7aa54c789f9a35512943472c16624675f7..8dccac0ee6027ad8e639f01cf11da7be58089587 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.SeekBar;
 import android.widget.TextView;
@@ -32,7 +33,7 @@ public class BarStatusAlphaActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mAlpha = 112;
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaFragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaFragment.java
index 40ab6cda0698135f30a4a2b045b4ba6bfc8f6888..2cd3c18abec01b68410a77bb33de3a9af3136d9e 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusAlphaFragment.java
@@ -1,6 +1,7 @@
 package com.blankj.androidutilcode.feature.core.bar;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.SeekBar;
 import android.widget.TextView;
@@ -32,7 +33,7 @@ public class BarStatusAlphaFragment extends BaseLazyFragment {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mAlpha = 112;
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorActivity.java
index 96561eb552679725a676fd8f23bd8a70b81b66e2..2b2db7f45176853cf1eea0c3a0ac3bf3f188a526 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.widget.SeekBar;
@@ -39,7 +40,7 @@ public class BarStatusColorActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mRandom = new Random();
         mColor = ContextCompat.getColor(UtilsApp.getInstance(), R.color.colorPrimary);
         mAlpha = 112;
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorFragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorFragment.java
index 93cabc5fcb94844879467d23ab54f21576b36372..15e54f2183527ebb71bcfe74b7c3a0547c42ef5a 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusColorFragment.java
@@ -1,6 +1,7 @@
 package com.blankj.androidutilcode.feature.core.bar;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.widget.SeekBar;
@@ -37,7 +38,7 @@ public class BarStatusColorFragment extends BaseLazyFragment {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mRandom = new Random();
         mColor = ContextCompat.getColor(UtilsApp.getInstance(), R.color.colorPrimary);
         mAlpha = 112;
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusDrawerActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusDrawerActivity.java
index 9bf1f5402b9e598973ff076b938fbb6e849284f6..9890b0ab45c8ff4f86e725aebb4f023af6a0ec8d 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusDrawerActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusDrawerActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.widget.Button;
@@ -47,7 +48,7 @@ public class BarStatusDrawerActivity extends BaseDrawerActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mRandom = new Random();
         mColor = ContextCompat.getColor(UtilsApp.getInstance(), R.color.colorPrimary);
         mAlpha = 112;
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusFragmentActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusFragmentActivity.java
index 411d7920a23e9cbcc1727597c2e0a71e3699c14e..6855dc8177f63a188b54e0e4bd31e950665b0a97 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusFragmentActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusFragmentActivity.java
@@ -47,7 +47,7 @@ public class BarStatusFragmentActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewActivity.java
index 279e30d80e524d6f68998a3f3de2734f5702bb70..42aea67a5835a85400340984ce87faa4506d3862 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.bar;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.SeekBar;
 import android.widget.TextView;
@@ -32,7 +33,7 @@ public class BarStatusImageViewActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mAlpha = 112;
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewFragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewFragment.java
index 4714d52ce2c17fac8cc25b92fbf5876606b281e7..50b6a23d3638bd99188ae62794050dfd4dc461f0 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusImageViewFragment.java
@@ -1,6 +1,7 @@
 package com.blankj.androidutilcode.feature.core.bar;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.SeekBar;
 import android.widget.TextView;
@@ -31,7 +32,7 @@ public class BarStatusImageViewFragment extends BaseLazyFragment {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mAlpha = 112;
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusSwipeBackActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusSwipeBackActivity.java
index 3a7d5ec71c8c23c8525360d14460d7abb824669b..16f1011870baf9aaf02bc797a1a8c7acf1df5f49 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusSwipeBackActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/bar/BarStatusSwipeBackActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.View;
 import android.widget.Button;
@@ -48,7 +49,7 @@ public class BarStatusSwipeBackActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
         mRandom = new Random();
         mColor = ContextCompat.getColor(UtilsApp.getInstance(), R.color.colorPrimary);
         mAlpha = 112;
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/clean/CleanActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/clean/CleanActivity.java
index d4d4ed5fb0de59700842f208738098fdc1284ab9..27a1819981a49bf4ef64b46d5417c192aec92d6e 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/clean/CleanActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/clean/CleanActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Environment;
+import android.support.annotation.NonNull;
 import android.view.View;
 
 import com.blankj.androidutilcode.R;
@@ -36,7 +37,7 @@ public class CleanActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/device/DeviceActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/device/DeviceActivity.java
index 7d5616aee38dfaa37be5038f5a9fce8e7ce33c62..86d4b1791e10c6c9345028b2cde7138f54640f7f 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/device/DeviceActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/device/DeviceActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.device;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -27,7 +28,7 @@ public class DeviceActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/ChildFragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/ChildFragment.java
index ae9fd35bbf756a27c054b28f4885f5c0faaab427..90888a83743aeb9eb66d28c90b306f691b5c0834 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/ChildFragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/ChildFragment.java
@@ -2,6 +2,7 @@ package com.blankj.androidutilcode.feature.core.fragment;
 
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -33,7 +34,7 @@ public class ChildFragment extends BaseFragment
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/FragmentActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/FragmentActivity.java
index 7b5efaabdc7e4a4233db2d976bbb72669116ff81..c9031bef2dbc3e32dcf2b3804c58507d4a19b705 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/FragmentActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/FragmentActivity.java
@@ -40,7 +40,7 @@ public class FragmentActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root0Fragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root0Fragment.java
index 2221007289ed789cb55241ab595fbebc4cc4628f..3cbe2e45f08115d040565d3fbb08cd927f623048 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root0Fragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root0Fragment.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.fragment;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.transition.Fade;
 import android.view.View;
@@ -37,7 +38,7 @@ public class Root0Fragment extends BaseFragment
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root1Fragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root1Fragment.java
index 58f67cffbd5d951727292f60e963a5ba35b52c39..fa2d2ad58e992bba36fb3b9bb737af2014a0ad7d 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root1Fragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root1Fragment.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.fragment;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.transition.Fade;
 import android.view.View;
@@ -37,7 +38,7 @@ public class Root1Fragment extends BaseFragment
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root2Fragment.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root2Fragment.java
index 102f185a34f7be3b1a2e518ab94f47b74781e477..5da61307c1d4260a0a2e0de84da762b5c73fb4d3 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root2Fragment.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/fragment/Root2Fragment.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.fragment;
 import android.graphics.Color;
 import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.transition.Fade;
 import android.view.View;
@@ -37,7 +38,7 @@ public class Root2Fragment extends BaseFragment
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/image/ImageActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/image/ImageActivity.java
index ddda57fbf41c86ed8d945e86f27b46ff0240fc1a..d45d944bb365b26340907d1c0b78888f5f484bc6 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/image/ImageActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/image/ImageActivity.java
@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
@@ -37,7 +38,7 @@ public class ImageActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/keyboard/KeyboardActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/keyboard/KeyboardActivity.java
index f2cf9f4fe8271a0ed54dee8da846a4033df81530..e155fdb984b1ee15b236d5b837f99a9c0cb7e6f5 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/keyboard/KeyboardActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/keyboard/KeyboardActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.keyboard;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v7.app.AlertDialog;
 import android.view.MotionEvent;
 import android.view.View;
@@ -36,7 +37,7 @@ public class KeyboardActivity extends BaseBackActivity {
     private AlertDialog dialog;
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/log/LogActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/log/LogActivity.java
index 3bbaae83f284a65d6d373a0a9062414b6df9c12c..6651fa66ef12286f1cccd56508f949a4bb3fc53a 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/log/LogActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/log/LogActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Environment;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -81,7 +82,7 @@ public class LogActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/network/NetworkActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/network/NetworkActivity.java
index df623104f38ef72fdf02048b8c6c19c92432aff6..fcaf92dc65fd83c5aa7ef8b4200727b2802cf303 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/network/NetworkActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/network/NetworkActivity.java
@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -56,7 +57,7 @@ public class NetworkActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/permission/PermissionActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/permission/PermissionActivity.java
index 0885d02e6312b6c6e406f60b8f817468772fe849..3f06b3a6e537417a9a7ff5cb0b81e5c8d44b97e3 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/permission/PermissionActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/permission/PermissionActivity.java
@@ -5,6 +5,7 @@ import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -38,7 +39,7 @@ public class PermissionActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/phone/PhoneActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/phone/PhoneActivity.java
index 142c55f6cbee6d505b89843a3a5e6a89f3bb697f..bfd9d202c9c1459999cb3f0679582307aa8e4797 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/phone/PhoneActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/phone/PhoneActivity.java
@@ -4,6 +4,7 @@ import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -31,7 +32,7 @@ public class PhoneActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/process/ProcessActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/process/ProcessActivity.java
index 6c0a4079643f8a30130efa9ca7da38ae51113091..2c6fdf662eca3f1501a5891c210c20b833c53a2e 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/process/ProcessActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/process/ProcessActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.process;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -32,7 +33,7 @@ public class ProcessActivity extends BaseBackActivity {
     private TextView tvAboutProcess;
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/reflect/ReflectActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/reflect/ReflectActivity.java
index c9fbd1246dcd7c184cee7f6d5dfab2f208f7b38f..2831c841d4faeb97f42959e226e06c91361cd8d1 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/reflect/ReflectActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/reflect/ReflectActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.reflect;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -27,7 +28,7 @@ public class ReflectActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/screen/ScreenActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/screen/ScreenActivity.java
index 5ee5b3d92bfdab2eb712079823310e703a2e9f40..9c931715aea9548de207d09bcd09dd2988fed271 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/screen/ScreenActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/screen/ScreenActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.screen;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
@@ -31,7 +32,7 @@ public class ScreenActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/sdcard/SDCardActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/sdcard/SDCardActivity.java
index 1a7d93f5ddd16d821711a702925a30ef11e81564..a112fed8f38ab8089a112b2b32872fd581abedcd 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/sdcard/SDCardActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/sdcard/SDCardActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.sdcard;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -27,7 +28,7 @@ public class SDCardActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/snackbar/SnackbarActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/snackbar/SnackbarActivity.java
index 9bec05ab687d0cd2b2afa9aab990d37a91c8b6b8..89da1c72556aba354c0f7a1976d2dbed7b8609df 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/snackbar/SnackbarActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/snackbar/SnackbarActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.annotation.StringRes;
 import android.text.SpannableStringBuilder;
 import android.view.View;
@@ -34,7 +35,7 @@ public class SnackbarActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/sp/SPActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/sp/SPActivity.java
index 91e5fef90eb81a27e6f29eacfc616cd2788f0400..ab1c20c75fa0cf3eb0c13ef9d3f934f5a3db98d7 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/sp/SPActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/sp/SPActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.core.sp;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -28,7 +29,7 @@ public class SPActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/span/SpanActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/span/SpanActivity.java
index d2cef13964234e0e661b6886fc376d6f25c13329..73517d8cf47ccba180e3e20ee4cb19efe0226076 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/span/SpanActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/span/SpanActivity.java
@@ -12,6 +12,7 @@ import android.graphics.Matrix;
 import android.graphics.Shader;
 import android.graphics.Typeface;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.text.Layout;
 import android.text.SpannableStringBuilder;
@@ -68,7 +69,7 @@ public class SpanActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/core/toast/ToastActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/core/toast/ToastActivity.java
index 8a294d7472961959a3fdb2046ae4c3b69452a8bd..bc0cab722dd67494557903e0f098b6e59004c69f 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/core/toast/ToastActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/core/toast/ToastActivity.java
@@ -4,6 +4,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.content.ContextCompat;
 import android.view.Gravity;
 import android.view.View;
@@ -31,7 +32,7 @@ public class ToastActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/sub/SubUtilActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/sub/SubUtilActivity.java
index 6a8a6a888a8e59fb79934a776508b1a5b964f31c..c1921c415b1cfba51d7d104993b81a456390298c 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/sub/SubUtilActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/sub/SubUtilActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.sub;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 
 import com.blankj.androidutilcode.R;
@@ -27,7 +28,7 @@ public class SubUtilActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/sub/brightness/BrightnessActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/sub/brightness/BrightnessActivity.java
index 8403fca9dd84541c1184672b7c2d79bcf4c59d94..53560283909d8364d089de7ec8e2fc0d659c80ba 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/sub/brightness/BrightnessActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/sub/brightness/BrightnessActivity.java
@@ -6,6 +6,7 @@ import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.provider.Settings;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.CompoundButton;
 import android.widget.SeekBar;
@@ -78,7 +79,7 @@ public class BrightnessActivity extends BaseActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/sub/location/LocationActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/sub/location/LocationActivity.java
index ffec2c6240ed62824c7f62568313fe278d741ffe..91cebfc0d325bb410ff3b7a7a62925cd0a83a729 100755
--- a/app/src/main/java/com/blankj/androidutilcode/feature/sub/location/LocationActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/sub/location/LocationActivity.java
@@ -6,6 +6,7 @@ import android.content.Intent;
 import android.content.ServiceConnection;
 import android.os.Bundle;
 import android.os.IBinder;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -32,7 +33,7 @@ public class LocationActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }
 
diff --git a/app/src/main/java/com/blankj/androidutilcode/feature/sub/pinyin/PinyinActivity.java b/app/src/main/java/com/blankj/androidutilcode/feature/sub/pinyin/PinyinActivity.java
index aafb5bbee7445c98f8317a52493ebb3d10101888..9f64cb993eec93b4111eeab670ae7be7e497aae8 100644
--- a/app/src/main/java/com/blankj/androidutilcode/feature/sub/pinyin/PinyinActivity.java
+++ b/app/src/main/java/com/blankj/androidutilcode/feature/sub/pinyin/PinyinActivity.java
@@ -3,6 +3,7 @@ package com.blankj.androidutilcode.feature.sub.pinyin;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.view.View;
 import android.widget.TextView;
 
@@ -26,7 +27,7 @@ public class PinyinActivity extends BaseBackActivity {
     }
 
     @Override
-    public void initData(Bundle bundle) {
+    public void initData(@NonNull Bundle bundle) {
 
     }