处理Android应用程序暂停来电并在通话结束后恢复

Question

我想在手机收到来电时暂停我的android应用程序。通话结束后，我希望我的应用程序自动恢复。

这将如何在Android应用程序中实现？

Answer 1

你必须为PhoneState实现一个监听器。我这样做在一个私有类：

private class PhoneCallListener extends PhoneStateListener { 

    private boolean isPhoneCalling = false; 

    // needed for logging 
    String TAG = "PhoneCallListener"; 

    @Override 
    public void onCallStateChanged(int state, String incomingNumber) { 

     if (TelephonyManager.CALL_STATE_RINGING == state) { 
      // phone ringing 
      Log.i(TAG, "RINGING, number: " + incomingNumber); 
     } 

     if (TelephonyManager.CALL_STATE_OFFHOOK == state) { 
      // active 
      Log.i(TAG, "OFFHOOK"); 

      isPhoneCalling = true; 
     } 

     if (TelephonyManager.CALL_STATE_IDLE == state) { 
      // run when class initial and phone call ended, 
      // need detect flag from CALL_STATE_OFFHOOK 
      Log.i(TAG, "IDLE"); 

      if (isPhoneCalling) { 

       Log.i(TAG, "restart app"); 

       // restart call application 
       Intent i = getBaseContext().getPackageManager() 
         .getLaunchIntentForPackage(
           getBaseContext().getPackageName()); 
       i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK 
         | Intent.FLAG_ACTIVITY_CLEAR_TOP 
         | Intent.FLAG_ACTIVITY_SINGLE_TOP); 
       startActivity(i); 

       isPhoneCalling = false; 
      } 

     } 


} 
} 

，你需要允许添加到清单，文件

<uses-permission android:name="android.permission.READ_PHONE_STATE" /> 

Answer 2

private class EndCallListener extends PhoneStateListener { 
    private boolean active = false; 
    @Override 
    public void onCallStateChanged(int state, String incomingNumber) { 
    if(TelephonyManager.CALL_STATE_RINGING == state) { 
     Log.i("EndCallListener", "RINGING, number: " + incomingNumber); 
    } 
    if(TelephonyManager.CALL_STATE_OFFHOOK == state) { 
     //wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call. 
     active = true; 
     Log.i("EndCallListener", "OFFHOOK"); 
    } 
    if(TelephonyManager.CALL_STATE_IDLE == state) { 
     //when this state occurs, and your flag is set, restart your app 
     Log.i("EndCallListener", "IDLE"); 
     if (active) { 
     active = false; 
     // stop listening     
     TelephonyManager mTM = (TelephonyManager) m_activity.getSystemService(Context.TELEPHONY_SERVICE); 
     mTM.listen(this, PhoneStateListener.LISTEN_NONE); 
     // restart the inbox activity 
     //Intent intent = new Intent(m_activity, MDInboxActivity.class); 
     //m_activity.startActivity(intent); 
     } 
    } 
    } 
} 

而且你可以通过调用下面的代码初始化上述类：

try { 
    EndCallListener callListener = new EndCallListener(); 
    TelephonyManager mTM = (TelephonyManager) m_activity.getSystemService(Context.TELEPHONY_SERVICE); 
    mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE); 
} catch(Exception e) { 
    Log.e("callMonitor", "Exception: "+e.toString()); 
}