1.定义广播组件，组件类型继承BroadcastReceiver类：
package org.lxh.demo;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class MyBroadcastReceiverUtil extends BroadcastReceiver { public MyBroadcastReceiverUtil(){ System.out.println("***每次广播都会实例化一个新的广播组件进行操作！"); } @Override public void onReceive(Context context, Intent intent) {//注意参数 Toast.makeText(context, "广播已经启动", Toast.LENGTH_LONG).show(); }}2.main.xml：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/mybtn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="开始广播" /></LinearLayout>
3.定义Activity程序发送广播：
package org.lxh.demo;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class Hello extends Activity { private Button mybtn = null; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 生命周期方法 super.setContentView(R.layout.main); // 设置要使用的布局管理器 this.mybtn = (Button) super.findViewById(R.id.mybtn); this.mybtn.setOnClickListener(new OnClickListenerImpl()); } private class OnClickListenerImpl implements OnClickListener { public void onClick(View arg0) { Intent it = new Intent(Intent.ACTION_EDIT); Hello.this.sendBroadcast(it); } }}4.在AndroidManifest.xml文件中注册广播组件：
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="org.lxh.demo" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="10" /> <application android:icon="@drawable/icon" android:label="@string/app_name" > <activity android:name=".Hello" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <strong><span style="color:#ff0000;"><receiver android:name="MyBroadcastReceiverUtil" android:enabled="true" > <intent-filter> <action android:name="android.intent.action.EDIT" /> </intent-filter> </receiver></span></strong> </application></manifest>5.运行实例如下：
