摘要：
Android版本更高时会出现问题。静态注册顺序不能用于发送广播。另一个接收器用于接收广播注册文件？
安卓版本高了就会有点问题，不能静态注册
令活动Main用来发广播，另一个接收器(不是Activity而是receiver)用来接收广播
注册文件
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.mybroadi"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <receiver android:name=".Myreceiver" android:enabled="true" android:exported="true"> <intent-filter> <action android:name="com.example.mybroadi.bd"/> </intent-filter> </receiver> </application> </manifest>
布局文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="发送广播"/> </LinearLayout>
java代码
接收器
package com.example.mybroadi; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.widget.Toast; public class Myreceiver extends BroadcastReceiver { private static final String ACTION1 = "com.example.mybroadi.bd"; private static final String ACTION2 = ""; //广播接收器，还要去注册一下这个接收器 @Override public void onReceive(Context context, Intent intent) { Toast.makeText(context,"ok",Toast.LENGTH_SHORT).show(); if(intent.getAction().equals(ACTION1)){ Toast.makeText( context,"收到"+ACTION1,Toast.LENGTH_SHORT ).show(); } else { Toast.makeText( context,"收到"+ACTION2,Toast.LENGTH_SHORT ).show(); } } }
Main
package com.example.mybroadi; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Button button1 = (Button)findViewById(R.id.button1); button1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //发送一条广播 Intent intent = new Intent("com.example.mybroadi.bd"); sendBroadcast(intent);//发送广播 } }); } }