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android - 在响铃期间更改铃声音量

转载 作者:塔克拉玛干 更新时间:2023-11-03 00:11:31 24 4
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我想在响铃时更改铃声音量。下面的代码在响铃期间设置它(它在系统设置中更改)但它不会在实际响铃时生效(只有下一个响铃调用才会使用新值)。我可以强制此更改使它们立即生效吗?

AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);    
audio.setStreamVolume(AudioManager.STREAM_RING, volume, AudioManager.FLAG_ALLOW_RINGER_MODES | AudioManager.FLAG_PLAY_SOUND);

最佳答案

经过一些研究和测试后,我发现只有在来电检测的早期阶段才有可能改变音量。重要的是不要在 onReceive() 方法中执行太多操作。

public class CallReceiver extends BroadcastReceiver   {

private boolean isRinging = false;
private boolean isInProgress = false;
private Listener mListener = null;

// interface declaration
public interface Listener {
public void onPhoneStateChange(boolean state);
}

// registration of listener
public void registerListener (Listener listener) {
mListener = listener;
}


@Override
public void onReceive(Context context, Intent intent) {


String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);

if(TelephonyManager.EXTRA_STATE_RINGING.equals(state)) {
// do something while ringing BUT NOT TOO MUCH!

isRinging = true;

if (context instanceof StateChecker)
((StateChecker) context).serviceDestroy();
Log.v("phone", "ringing");

}


else if(TelephonyManager.EXTRA_STATE_IDLE.equals(state)) {
//do something when the call ends
if (context instanceof StateChecker)
((StateChecker) context).serviceStart();
Log.v("phone", "idle");
isRinging = false;
}


// sending notification to listener
if(mListener != null) {
mListener.onPhoneStateChange(isRinging);

Log.v("listener", "notified");


}

}

}

和来自服务的一些代码:

// listeners callbacks
public void onPhoneStateChange(boolean state) {

if (state) {

if (!callInProgress) {

// Do the main task here
callInProgress = true;
serviceDestroy();

}

} else {

callInProgress = false;
serviceStart();

}
}

服务启动:

 // starting service
public void serviceStart() {

preferencesRead();

//The intent to launch when the user clicks the expanded notification
Intent intent = new Intent(this, MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
PendingIntent pendIntent = PendingIntent.getActivity(this, 0, intent, 0);



if(settings.getBoolean("hide_noti_icon", false)) {
Notification noti = new NotificationCompat.Builder(this)
.setContentTitle("Intelligent Ringer")
.setContentText(getString(R.string.is_running))
.setSmallIcon(R.drawable.invisible)
.setContentIntent(pendIntent)
.setPriority(Notification.PRIORITY_MIN)
.build();

startForeground(12345, noti);


} else {

Notification noti = new NotificationCompat.Builder(this)
.setContentTitle("Intelligent Ringer")
.setContentText(getString(R.string.is_running))
.setSmallIcon(R.drawable.ic_launcher)
.setContentIntent(pendIntent)
.setPriority(Notification.PRIORITY_MIN)
.build();

startForeground(12345, noti);
}


Log.v("service", "started");
// registering listener for CallReceiver
if(isCRRegistered) {
unregisterReceiver(mCallReceiver);
isCRRegistered = false;
}

if(!isCRRegistered) {

IntentFilter filter2 = new IntentFilter("android.intent.action.PHONE_STATE");
filter2.addAction("android.intent.action.PHONE_STATE");
CallReceiver mCallReceiver = new CallReceiver();
this.mCallReceiver = mCallReceiver;
registerReceiver(mCallReceiver, filter2);
mCallReceiver.registerListener(this);
isCRRegistered = true;
}

if(isScreenRegistered) {
unregisterReceiver(mReceiver);
isScreenRegistered = false;
}



if(!isPositionRegistered && proximityOn) {

Position mPosition = new Position(this.getApplicationContext());
mPosition.registerListener(this);
mPosition.isInPocket();
this.mPosition = mPosition;
mPosition.register();

isPositionRegistered = true;
}

if(!isScreenRegistered) {
IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
filter.addAction(Intent.ACTION_SCREEN_OFF);
ScreenReceiver mReceiver = new ScreenReceiver();
registerReceiver(mReceiver, filter);
this.mReceiver = mReceiver;

mReceiver.registerListener(this);

isScreenRegistered = true;
}


}

服务销毁()

// stopping service
public void serviceDestroy() {


if (this.mPosition != null) {
this.mPosition.unregister();
}

Log.v("service", "Destroyed");

if(isScreenRegistered) {
unregisterReceiver(mReceiver);
isScreenRegistered = false;
}

}

OnDestroy()

public void onDestroy () {
serviceDestroy();


if(isCRRegistered) {

unregisterReceiver(mCallReceiver);
isCRRegistered = false;

}
}

关于android - 在响铃期间更改铃声音量,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14429133/

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