学步园

需要权限：

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

方式一：通过广播接收来电

定义来电广播接收类

package com.zhouzijing.android.demo;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.util.Log;

public class BroadcastReceiverMgr extends BroadcastReceiver {
    
    private final String TAG = MyBroadcastReceiver.TAG;

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.i(TAG, "[Broadcast]"+action);
        
        //呼入电话
        if(action.equals(MyBroadcastReceiver.B_PHONE_STATE)){
            Log.i(TAG, "[Broadcast]PHONE_STATE");
            doReceivePhone(context,intent);
        }
    }
    
    /**
     * 处理电话广播.
     * @param context
     * @param intent
     */
    public void doReceivePhone(Context context, Intent intent) {
        String phoneNumber = intent.getStringExtra(
TelephonyManager.EXTRA_INCOMING_NUMBER);
        TelephonyManager telephony = 
(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
        int state = telephony.getCallState();
        switch(state){
        case TelephonyManager.CALL_STATE_RINGING:
            Log.i(TAG, "[Broadcast]等待接电话="+phoneNumber);
            break;
        case TelephonyManager.CALL_STATE_IDLE:
            Log.i(TAG, "[Broadcast]电话挂断="+phoneNumber);
            break;
        case TelephonyManager.CALL_STATE_OFFHOOK:
            Log.i(TAG, "[Broadcast]通话中="+phoneNumber);
            break;
        }
    }
}

package com.zhouzijing.android.demo;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;

public class MyBroadcastReceiver extends Activity {
    public final static String TAG = "MyBroadcastReceiver";
    
    public final static String B_PHONE_STATE = 
TelephonyManager.ACTION_PHONE_STATE_CHANGED;
    
    private BroadcastReceiverMgr mBroadcastReceiver;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_broadcast_receiver);
    }    

    //按钮1-注册广播
    public void registerIt(View v) {
        Log.i(TAG, "registerIt");
        mBroadcastReceiver = new BroadcastReceiverMgr();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(B_PHONE_STATE);
        intentFilter.setPriority(Integer.MAX_VALUE);
        registerReceiver(mBroadcastReceiver, intentFilter);
    }
    
    //按钮2-撤销广播
    public void unregisterIt(View v) {
        Log.i(TAG, "unregisterIt");
        unregisterReceiver(mBroadcastReceiver);
    }
    
}

方式二：通过监听器来实现

package com.zhouzijing.android.demo;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.view.View;

public class MyBroadcastReceiver extends Activity {
    public final static String TAG = "MyBroadcastReceiver";
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.my_broadcast_receiver);
    }
    
    /**
     * 按钮-监听电话
     * @param v
     */
    public void createPhoneListener(View v) {
        TelephonyManager telephony = (TelephonyManager)getSystemService(
Context.TELEPHONY_SERVICE);
        telephony.listen(new OnePhoneStateListener(),
PhoneStateListener.LISTEN_CALL_STATE);
    }
    
    /**
     * 电话状态监听.
     * @author stephen
     *
     */
    class OnePhoneStateListener extends PhoneStateListener{
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            Log.i(TAG, "[Listener]电话号码:"+incomingNumber);
            switch(state){
            case TelephonyManager.CALL_STATE_RINGING:
                Log.i(TAG, "[Listener]等待接电话:"+incomingNumber);
                break;
            case TelephonyManager.CALL_STATE_IDLE:
                Log.i(TAG, "[Listener]电话挂断:"+incomingNumber);
                break;
            case TelephonyManager.CALL_STATE_OFFHOOK:
                Log.i(TAG, "[Listener]通话中:"+incomingNumber);
                break;
            }
            super.onCallStateChanged(state, incomingNumber);
        }
    }
    
    

    
}