ANDROID_MARS学习笔记_S01原始版_012_广播机制一

一、简介

二、代码
1.xml
(1)activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<Button
    android:id="@+id/sendButton" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="发送消息给Receiver"
    />
</LinearLayout>

(2)AndroidManifest.xml.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.broadcast"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <receiver android:name=".TestReceiver">
            <intent-filter>
                <action android:name="android.intent.action.EDIT"/>
            </intent-filter>
        </receiver>
    </application>
    <uses-permission android:name="android.permission.RECEIVE_SMS"/>
</manifest>

2.java
(1)MainActivity.java

package com.broadcast;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    private Button sendButton;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sendButton = (Button)findViewById(R.id.sendButton);
        sendButton.setOnClickListener(new BroadcastListener());
    }
    class BroadcastListener implements OnClickListener{

        @Override
        public void onClick(View v) {
            Intent intent = new Intent();
            intent.setAction(Intent.ACTION_EDIT);//要与在AndroidManifest.xml设置值一致
            MainActivity.this.sendBroadcast(intent);
        }
        
    }
}

(2)TestReceiver.java

package com.broadcast;

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

public class TestReceiver extends BroadcastReceiver{

    public TestReceiver(){
        System.out.println("TestReceiver");
    }
    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("onReceive");
    }
}