android – 在响铃期间改变铃声音量

概述我想在响铃期间改变铃声音量.下面的代码在振铃期间设置它(在系统设置中更改)但它不会在实际振铃时生效(只有下一个振铃呼叫将使用新值).我可以强制进行此更改以使其立即生效吗？ AudioManager audio = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); audio.setStreamVolume(Aud 我想在响铃期间改变铃声音量.下面的代码在振铃期间设置它(在系统设置中更改)但它不会在实际振铃时生效(只有下一个振铃呼叫将使用新值).我可以强制进行此更改以使其立即生效吗？

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

解决方法 经过一些研究和测试后,我发现只有在接入呼叫检测的早期阶段才能实现音量变化.在onReceive()方法中做很多 *** 作至关重要.

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;    }@OverrIDepublic 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");        }}}

以及来自服务的一些代码：

// Listeners callbackspublic voID onPhonestateChange(boolean state) {    if (state) {        if (!callinProgress)    {       // Do the main task here        callinProgress = true;        serviceDestroy();        }    } else {        callinProgress = false;        serviceStart();    }}

ServiceStart：

// starting servicepublic 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,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;    }}

Servicedestroy()

// stopPing servicepublic voID serviceDestroy()    {    if (this.mposition != null) {    this.mposition.unregister();    }    Log.v("service","Destroyed");    if(isScreenRegistered)  {        unregisterReceiver(mReceiver);        isScreenRegistered = false;    }}

的OnDestroy()

public voID onDestroy () {    serviceDestroy();    if(isCRRegistered)  {        unregisterReceiver(mcallreceiver);        isCRRegistered = false;        }}

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