标签:MyBroadcastReceiver void 广播 Intent 注册 Override Android BroadcastReceiver public
一、静态注册 【仅在安卓7.0及其以下能运行】
1、布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
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="com.example.lenovo.broadcasttest.MainActivity">
<Button
android:id="@+id/button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Send Broadcast"/>
</RelativeLayout>
2、静态注册
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button=(Button) findViewById(R.id.button);
//这里是指发送一条信息,让广播接收,如果不发,静态广播在任意处接收了意向的ACTION都会响应,这里可以设置成缓存的信息,开启服务后,读取缓存,接收执行静态广播的响应
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
//监听有com.example.broadcasttest.MY_BROADCAST这条广播的接收器会收到消息
Intent intent = new Intent("com.example.broadcasttest.MY_BROADCAST");
sendBroadcast(intent);
}
});
}
}
3、(广播)MyBroadcastReceiver.java
public class MyBroadcastReceiver extends BroadcastReceiver {
public MyBroadcastReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
//执行某些操作,但不要进行耗时操作
Toast.makeText(context,"欢迎关注彭老希",Toast.LENGTH_SHORT).show();
}
}
4、AndroidManifest.xml 注册 --> 静态注册的表现
<receiver
android:name=".MyBroadcastReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<-- 自定义name -->
<action android:name="com.example.broadcasttest.MY_BROADCAST"/>
</intent-filter>
</receiver>
二、动态注册
public class MainActivity extends AppCompatActivity {
//自定义广播的变量
private MyBroadcastReceiver myBroadcastReceiver;
//Intent意向过滤
private IntentFilter intentFilter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intentFilter = new IntentFilter();
//这里定义接受器监听广播的类型,这里添加相应的广播
intentFilter.addAction("com.example.broadcasttest.MY_BROADCAST");
//实例化接收器
myBroadcastReceiver=new MyBroadcastReceiver();
//动态注册 :注册事件,将监听类型赋给对应的广播接收器
registerReceiver(myBroadcastReceiver,intentFilter);
Button button=(Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v){
//这是一条自定义标准广播-----所有监听com.example.broadcasttest.MY_BROADCAST这条广播的接收器都会收到消息
Intent intent=new Intent("com.example.broadcasttest.MY_BROADCAST");
sendBroadcast(intent);
}
});
}
@Override
protected void onDestroy(){
super.onDestroy();
//注销事件
unregisterReceiver(myBroadcastReceiver);
}
}
(广播)MyBroadcastReceiver.java
public class MyBroadcastReceiver extends BroadcastReceiver {
public MyBroadcastReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
//广播接收器仅仅定义了对监听到的广播的反应,没有定义监听的类型(在MainActivity.java中动态注册)
Toast.makeText(context,"欢迎关注彭老希",Toast.LENGTH_SHORT).show();
}
}
标签:MyBroadcastReceiver,void,广播,Intent,注册,Override,Android,BroadcastReceiver,public 来源: https://blog.csdn.net/weixin_44720673/article/details/117529501
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。