android - 如何在Android L中以编程方式打开来电扬声器？

Question

我想在 Android 5.0 中使用我手机的接听电话 GUI(电话 GUI)接听来电。我找到了一种需要进行 Activity 的方法，该 Activity 用于发送一些操作以打开电话的 GUI。我成功地打开了电话的 GUI 来电。问题是如何打开电话 GUI 的扬声器。我尝试了代码，但它没有打开。你能帮我解决Android L中的那个问题吗

audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
audioManager.setMode(AudioManager.MODE_IN_CALL);
if (!audioManager.isSpeakerphoneOn())
     audioManager.setSpeakerphoneOn(true);
audioManager.setMode(AudioManager.MODE_NORMAL);

list

<uses-permission android:name="android.permission.CALL_PHONE"/>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>
<uses-permission android:name="android.permission.MODIFY_PHONE_STATE" />

此外，我们是否有更快捷的方式来打开接听电话的 Intent 来接听来电。我的路很长，因为它使用了一个 Activity 。

这是我的完整类(class)代码

public class AcceptCallActivity extends Activity {

    private static final String MANUFACTURER_HTC = "HTC";
    private KeyguardManager keyguardManager;
    private AudioManager audioManager;
    private CallStateReceiver callStateReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
        audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);        
    }

    @Override
    protected void onResume() {
        super.onResume();
        registerCallStateReceiver();
        updateWindowFlags();
        acceptCall();
    }

    @Override
    protected void onPause() {
        super.onPause();

        if (callStateReceiver != null) {
            unregisterReceiver(callStateReceiver);
            callStateReceiver = null;
        }
    }

    private void registerCallStateReceiver() {
        callStateReceiver = new CallStateReceiver();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED);
        registerReceiver(callStateReceiver, intentFilter);
    }

    private void updateWindowFlags() {
        if (keyguardManager.inKeyguardRestrictedInputMode()) {
            getWindow().addFlags(
                    WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
                            WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
                            WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
        } else {
            getWindow().clearFlags(
                    WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
                            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
                            WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
        }
    }

    private void acceptCall() {

        // for HTC devices we need to broadcast a connected headset
        boolean broadcastConnected = MANUFACTURER_HTC.equalsIgnoreCase(Build.MANUFACTURER)
                && !audioManager.isWiredHeadsetOn();

        if (broadcastConnected) {
            broadcastHeadsetConnected(false);
        }

        try {
            try {
                Log.d("AnswerCall","execute input keycode headset hook");
                //Turn on speaker
                audioManager.setMode(AudioManager.MODE_IN_CALL);
                if (!audioManager.isSpeakerphoneOn())
                    audioManager.setSpeakerphoneOn(true);
                audioManager.setMode(AudioManager.MODE_NORMAL);
                Runtime.getRuntime().exec("input keyevent " +
                        Integer.toString(KeyEvent.KEYCODE_HEADSETHOOK));

            } catch (IOException e) {
                // Runtime.exec(String) had an I/O problem, try to fall back
                Log.d("AnswerCall","send keycode headset hook intents");
                String enforcedPerm = "android.permission.CALL_PRIVILEGED";
                Intent btnDown = new Intent(Intent.ACTION_MEDIA_BUTTON).putExtra(
                        Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN,
                                KeyEvent.KEYCODE_HEADSETHOOK));
                Intent btnUp = new Intent(Intent.ACTION_MEDIA_BUTTON).putExtra(
                        Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_UP,
                                KeyEvent.KEYCODE_HEADSETHOOK));

                sendOrderedBroadcast(btnDown, enforcedPerm);
                sendOrderedBroadcast(btnUp, enforcedPerm);
            }
        } finally {
            if (broadcastConnected) {
                broadcastHeadsetConnected(false);
            }
        }
    }

    private void broadcastHeadsetConnected(boolean connected) {
        Intent i = new Intent(Intent.ACTION_HEADSET_PLUG);
        i.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
        i.putExtra("state", connected ? 1 : 0);
        i.putExtra("name", "mysms");
        try {
            sendOrderedBroadcast(i, null);
        } catch (Exception e) {
        }
    }


    private class CallStateReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            finish();
        }
    }
}

Answer 1

终于，我得到了解决方案。我把上面的代码放在一个线程中运行。它运作良好。这是我的代码。希望它可以帮助某人

            Thread thread = new Thread() {
                @Override
                public void run() {
                    try {
                        while(true) {
                            sleep(1000);
                            audioManager.setMode(AudioManager.MODE_IN_CALL);
                            if (!audioManager.isSpeakerphoneOn())
                                audioManager.setSpeakerphoneOn(true);
                        }
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            };

            thread.start();