Android Service 系统服务

 1     public class MyPhoneCallListener extends PhoneStateListener{
 2         public void onCallStateChanged(int state,String incomingnae)
 3         {
 4             switch(state)
 5             {
 6             case TelephonyManager.CALL_STATE_OFFHOOK:
 7                 Toast.makeText(MainActivity.this, "正在通话中。。。", Toast.LENGTH_LONG).show();
 8                 break;
 9             case TelephonyManager.CALL_STATE_RINGING:
10                 Toast.makeText(MainActivity.this,incomingnae, Toast.LENGTH_LONG).show();
11                 break;
12             }
13             super.onCallStateChanged(state, incomingnae);
14         }
15     }