fix android demo gpu

mace/examples/android/app/src/main/AndroidManifest.xml

@@ -3,6 +3,7 @@
     package="com.xiaomi.mace.demo">
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
     <uses-permission android:name="android.permission.CAMERA" />
 

mace/examples/android/app/src/main/java/com/xiaomi/mace/demo/camera/CameraApiLessM.java

@@ -104,8 +104,6 @@ public class CameraApiLessM extends CameraEngage implements Camera.AutoFocusCall
     private void setOutputConfig(int width, int height) {
         Camera.Parameters parameters = mCamera.getParameters();
         parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
-        parameters.setPreviewFormat(ImageFormat.JPEG);
-        parameters.setPictureFormat(ImageFormat.JPEG);
         Camera.Size size = getOptimalSize(parameters.getSupportedPreviewSizes(), width, height);
         mPreviewWidth = size.width;
         mPreviewHeight = size.height;

mace/examples/android/app/src/main/java/com/xiaomi/mace/demo/camera/CameraEngage.java

@@ -212,9 +212,9 @@ public abstract class CameraEngage implements SurfaceTextureListener {
     }
 
     boolean checkCameraPermission() {
-        if (ContextCompat.checkSelfPermission(mTextureView.getContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED ||
+        if (ContextCompat.checkSelfPermission(mTextureView.getContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(mTextureView.getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED ||
                 ContextCompat.checkSelfPermission(mTextureView.getContext(), Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
-            ((Activity) mTextureView.getContext()).requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE}, CAMERA_PERMISSION_REQ);
+            ((Activity) mTextureView.getContext()).requestPermissions(new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, CAMERA_PERMISSION_REQ);
             return false;
         }
         return true;

mace/examples/android/app/src/main/java/com/xiaomi/mace/demo/result/InitData.java

@@ -38,7 +38,11 @@ public class InitData {
         gpuPerfHint = 3;
         gpuPriorityHint = 3;
         device = DEVICES[0];
-        kernelPath = Environment.getDownloadCacheDirectory().getAbsolutePath() + File.separator + "mace";
+        kernelPath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "mace";
+        File file = new File(kernelPath);
+        if (!file.exists()) {
+            file.mkdir();
+        }
 
     }