上传新文件

app/src/main/java/com/example/myfirstapp/HeadsetReceiver.java

+package example.com.save;
+/**
+ * 耳机连接状态广播接收器
+ */
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothHeadset;
+import android.bluetooth.BluetoothProfile;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class HeadsetReceiver extends BroadcastReceiver {
+    private OnHeadsetListener onHeadsetListener;
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        String action = intent.getAction();
+        //蓝牙耳机
+        if (BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED.equals(action)) {
+            BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
+            int state = adapter.getProfileConnectionState(BluetoothProfile.HEADSET);
+            if (BluetoothProfile.STATE_CONNECTED == state) {
+                onHeadsetListener.isHeadsetConnected(true);
+            }
+            if (BluetoothProfile.STATE_DISCONNECTING == state) {
+                onHeadsetListener.isHeadsetConnected(false);
+            }
+        }
+        //有线耳机
+        else if (Intent.ACTION_HEADSET_PLUG.equals(action)) {
+            if (intent.hasExtra("state")) {
+                int state = intent.getIntExtra("state", 0);
+                if (state == 1) {
+                    //插入耳机
+                    onHeadsetListener.isHeadsetConnected(true);
+                } else if (state == 0) {
+                    //拔出耳机
+                    onHeadsetListener.isHeadsetConnected(false);
+                }
+            }
+        }
+    }
+    public void setOnHeadsetListener(OnHeadsetListener onHeadsetListener) {
+        this.onHeadsetListener = onHeadsetListener;
+    }
+}