通过ip拨号器来了解广播接收者

1、继承广播接收者类

package com.example.ipdail;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;

public class OutCallReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub
        //获取拨打的号码
        String number = getResultData();
        //获取config数据里面的数据
        SharedPreferences sp = context.getSharedPreferences("config", context.MODE_PRIVATE);
        String ipnumber = sp.getString("ipnumber", "");
        
        //修改号码并返回
        String newNumber = ipnumber + number;
        setResultData(newNumber);
    }
    

}

2、在清单文件配置广播接收者(因为属于四大组件之一),并通过action来表名要监听的频道

 <receiver android:name=".OutCallReceiver">
            <intent-filter>
                <action android:name="android.intent.action.NEW_OUTGOING_CALL"></action>
            </intent-filter>
        </receiver>

3、由于要监听外拨电话，所以要加一个权限

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

 

4、其他java代码

package com.example.ipdail;

import android.os.Bundle;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {

    private EditText et_ipnumber;
    
    private SharedPreferences sp;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_ipnumber = (EditText)findViewById(R.id.et_ipnumber);
        sp = getSharedPreferences("config", MODE_PRIVATE);
        et_ipnumber.setText(sp.getString("ipnumber", ""));
    }
    
    public void click(View view){
        String ipnumber = et_ipnumber.getText().toString().trim();
        
        Editor editor = sp.edit();
        editor.putString("ipnumber", ipnumber);
        editor.commit();
    }
}