Android中 广播发送 和 接受 的简单示例
16lz
2021-12-04
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.broadcast" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.broadcast.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=".MyReceiver"> <intent-filter > <action android:name="com.example.BROADCAST"/> </intent-filter> </receiver> </application></manifest>
<RelativeLayout 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" tools:context=".MainActivity" > <Button android:id="@+id/sendbroad" android:layout_width="match_parent" android:layout_height="90dp" android:text="发送广播"/></RelativeLayout>
package com.example.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 { private Button sendbt; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sendbt = (Button) findViewById(R.id.sendbroad); sendbt.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); intent.setAction("com.example.BROADCAST"); intent.putExtra("msg", "这是广播发送的消息"); sendBroadcast(intent); } }); }} MyReceiver
package com.example.broadcast;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context, "接收到的Intent的Action位："+intent.getAction()+"\n消息内容是："+intent.getStringExtra("msg"),Toast.LENGTH_LONG).show(); }} 效果如图
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