Android中级篇之容易的来电监视器

Android中级篇之简单的来电监视器

本文实现的是一个简单的来电监视器，用Toast来提示电话来电的不同状态；

看图 ：

主要代码 ：

package com.yin.telephony;import android.app.Activity;import android.os.Bundle;import android.telephony.PhoneStateListener;import android.telephony.TelephonyManager;import android.util.Log;import android.widget.Toast;public class MainActivity extends Activity {private static final String TAG = "com.yin.telephony";TelephonyManager myManager; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE); myManager.listen(new myManagerListener(), PhoneStateListener.LISTEN_CALL_STATE); } private class myManagerListener extends PhoneStateListener{public void onCallStateChanged(int state, String incomingNumber) {switch(state){case TelephonyManager.CALL_STATE_IDLE :Toast.makeText(getApplicationContext(), "电话中断", Toast.LENGTH_LONG).show();Log.e(TAG,"CALL_STATE_IDLE");break;case TelephonyManager.CALL_STATE_OFFHOOK :Toast.makeText(getApplicationContext(), "电话挂起", Toast.LENGTH_LONG).show();Log.e(TAG,"CALL_STATE_OFFHOOK");break;case TelephonyManager.CALL_STATE_RINGING :Toast.makeText(getApplicationContext(), "来电号码 ："+incomingNumber, Toast.LENGTH_LONG).show();Log.e(TAG,"CALL_STATE_RINGING");break;default :break;}super.onCallStateChanged(state, incomingNumber);} }}

注意添加相应权限 ：

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