src/com/android/gallery3d/video/SpeakerHooker.java

/*
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package com.android.gallery3d.video;

import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.AudioManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

import com.android.gallery3d.R;
import com.android.gallery3d.common.ApiHelper.AudioSystem;

public class SpeakerHooker extends MovieHooker {

    private static final int MENU_SPEAKER = 1;

    private AudioManager mAudioManager;

    private MenuItem mMenuSpeakerButton;

    private static boolean mIsHeadsetOn = false;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initAudioManager();
    }

    private void initAudioManager() {
        if (mAudioManager == null) {
            mAudioManager = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE);
        }
    }

    @Override
    public void onDestroy() {
        turnSpeakerOff();
        super.onDestroy();
    }

    @Override
    public void onResume() {
        super.onResume();
        registerHeadSetReceiver();
    }

    private void registerHeadSetReceiver() {
        final IntentFilter intentFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        intentFilter.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
        intentFilter.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
        intentFilter.addAction(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
        getContext().registerReceiver(mHeadSetReceiver, intentFilter);
    }

    @Override
    public void onPause() {
        unregisterHeadSetReceiver();
        super.onPause();
    }

    private void unregisterHeadSetReceiver() {
        try {
            getContext().unregisterReceiver(mHeadSetReceiver);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private final BroadcastReceiver mHeadSetReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (mAudioManager == null) {
                initAudioManager();
            }
            if (action.equals(Intent.ACTION_HEADSET_PLUG)) {
                mIsHeadsetOn = (intent.getIntExtra("state", 0) == 1)
                        || mAudioManager.isBluetoothA2dpOn();
            } else if (action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)
                    || action.equals(BluetoothDevice.ACTION_ACL_DISCONNECTED)) {
                final BluetoothClass bc = ((BluetoothDevice)
                        intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE))
                                .getBluetoothClass();
                if (bc == null) return;
                final int deviceClass = bc.getDeviceClass();
                if ((deviceClass == BluetoothClass.Device.AUDIO_VIDEO_HEADPHONES)
                        || (deviceClass == BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET)) {
                    mIsHeadsetOn = action.equals(BluetoothDevice.ACTION_ACL_CONNECTED)
                            || mAudioManager.isWiredHeadsetOn();
                }
            } else if (action.equals(AudioManager.ACTION_AUDIO_BECOMING_NOISY)) {
                mIsHeadsetOn = false;
            }
            updateSpeakerButton();
            if (!mIsHeadsetOn) {
                turnSpeakerOff();
            }
        }
    };

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        mMenuSpeakerButton = menu.add(0, getMenuActivityId(MENU_SPEAKER), 0, R.string.speaker_on);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);
        switch (getMenuOriginalId(item.getItemId())) {
            case MENU_SPEAKER:
                changeSpeakerState();
                return true;
            default:
                return false;
        }
    }

    private void changeSpeakerState() {
        if (isSpeakerOn()) {
            turnSpeakerOff();
        } else {
            if (mAudioManager == null) {
                initAudioManager();
            }
            boolean isBluetoothOn = mAudioManager.isBluetoothA2dpOn() ||
                    mAudioManager.isBluetoothScoOn();
            if (mIsHeadsetOn || isBluetoothOn) {
                turnSpeakerOn();
            } else {
                Toast.makeText(getContext(), getContext().getString(R.string.speaker_need_headset),
                        Toast.LENGTH_SHORT).show();
            }
        }
        updateSpeakerButton();
    }

    private void turnSpeakerOn() {
        if (mAudioManager == null) {
            initAudioManager();
        }
        boolean isBluetoothOn = mAudioManager.isBluetoothA2dpOn() ||
                mAudioManager.isBluetoothScoOn();
        if (isBluetoothOn) {
            AudioSystem.setForceUse(AudioSystem.FOR_MEDIA,
                    AudioSystem.FORCE_NO_BT_A2DP);
        } else {
            AudioSystem.setForceUse(AudioSystem.FOR_MEDIA,
                    AudioSystem.FORCE_SPEAKER);

        }
    }

    private void turnSpeakerOff() {
        if (mAudioManager == null) {
            initAudioManager();
        }
        AudioSystem.setForceUse(AudioSystem.FOR_MEDIA,
                AudioSystem.FORCE_NONE);
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        super.onPrepareOptionsMenu(menu);
        updateSpeakerButton();
        return true;
    }

    private void updateSpeakerButton() {
        if (mMenuSpeakerButton != null) {
            if (isSpeakerOn()) {
                mMenuSpeakerButton.setTitle(R.string.speaker_off);
            } else {
                mMenuSpeakerButton.setTitle(R.string.speaker_on);
            }
        }
    }

    private boolean isSpeakerOn() {
        return (AudioSystem.FORCE_SPEAKER
                == AudioSystem.getForceUse(AudioSystem.FOR_MEDIA)) ||
                (AudioSystem.FORCE_NO_BT_A2DP
                        == AudioSystem.getForceUse(AudioSystem.FOR_MEDIA));
    }

}