SystemService學習之TELEPHONY_SERVICE

TelephonyManager mTelephonyMgr = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);  

TelephonyManager 提供了一種獲取手機信息的方式，包括通話狀態、網絡連接、運營商信息等，

下面通過一個實例展示TelephonyManager 對通話狀態監控：

import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;  
import android.content.IntentFilter;
import android.telephony.PhoneStateListener;  
import android.telephony.TelephonyManager;  
import android.util.Log;  
import android.widget.TextView;  

public class MainActivity extends Activity {  
private static final String TAG = "Telephony";  
TextView view = null;  
@Override  
protected void onCreate(Bundle savedInstanceState) {  
    super.onCreate(savedInstanceState);  
    TelephonyManager mTelephonyMgr = 
        (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);  
    mTelephonyMgr.listen(new TeleListener(),PhoneStateListener.LISTEN_CALL_STATE);  
    view = new TextView(this);  
    view.setText("listen the state of phone\n");  
    setContentView(view);  
}  
    class TeleListener extends PhoneStateListener {  
     @Override  
      public void onCallStateChanged(int state, String incomingNumber) 
       {  
          super.onCallStateChanged(state, incomingNumber);  
          switch (state) {  
              case TelephonyManager.CALL_STATE_IDLE: {  
                 Log.d(TAG, "CALL_STATE_IDLE");  
                 view.append("CALL_STATE_IDLE " + "\n");  
                 break;  
                }  
            case TelephonyManager.CALL_STATE_OFFHOOK: {  
                 Log.d(TAG, "CALL_STATE_OFFHOOK");  
                 view.append("CALL_STATE_OFFHOOK" + "\n");  
                 break;  
                }  
           case TelephonyManager.CALL_STATE_RINGING: {  
                   Log.d(TAG, "CALL_STATE_RINGING");  
                   view.append("CALL_STATE_RINGING" + "\n");  
                break;  
                }  
        default:  
        	Log.d(TAG, " the statu is"+state);
        break;  
          }  
        }  
   }  
}