android四大组件之BroadcastReceiver ip拨号功能

BroadcastReceiver是广播接收者，系统会在产生事件的时候发送一些广播，比如开机，打电话，等等……

而BroadcastReceiver就可以接收到这些广播从而进行操作。

今天我们要做的就是在拨打号码的时候加上前面的ip号。

首先我们要注册一个BroadcastReceiver，然后我们要在清单文件里配置一些信息首先我们要明确这个BroadcastReceiver 要接收什么样的

广播。

<receiver android:name="com.example.ipcall.MyReceiver" >
            <intent-filter>
                <action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
                
            </intent-filter>
        </receiver>

这个就可以确定接收的是打电话时候发送的广播，然后在权限里还要加上

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

package com.example.ipcall;

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.view.View.OnClickListener;
import android.widget.EditText;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.btn).setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                EditText edt = (EditText) findViewById(R.id.ip);
                String ipnumber = edt.getText().toString();
                SharedPreferences sp = getSharedPreferences("number",MODE_PRIVATE);
                Editor editor = sp.edit();
                editor.putString("ip",ipnumber).commit();
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

package com.example.ipcall;

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

public class MyReceiver extends BroadcastReceiver {
    public MyReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO: This method is called when the BroadcastReceiver is receiving
        // an Intent broadcast.
        System.out.println("打电话了");
        //得到打电话的号码
        String number = getResultData();
        SharedPreferences sp = context.getSharedPreferences("number",context.MODE_PRIVATE);
        String ip = sp.getString("ip","");
        //设置打电话的好啊
        setResultData(ip+number);

    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <EditText
        android:id="@+id/ip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="请输入"/>

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</LinearLayout>