1、實驗效果
點擊按鈕,會播放音樂
2、目錄
3、代碼
MainActivity.java
package com.edu.bnuz.wugo;
import androidx.appcompat.app.AppCompatActivity;
import android.content.ComponentName;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
Button btnTest;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnTest=(Button)findViewById(R.id.btnTest);
btnTest.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction("cn.edu.bnuz.SE_TEAM");
intent.setComponent( new ComponentName( "com.edu.bnuz.wugo" , "com.edu.bnuz.wugo.MyBroadcastReceiver") );
sendBroadcast(intent);
}
});
}
}
MyBroadcastReceiver.java
package com.edu.bnuz.wugo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.util.Log;
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent){
Log.d("MyBroadcastReceiver","intent:"+intent);
try{
MediaPlayer.create(context,R.raw.start).start();
}
catch(Exception e){
Log.d("MyBroadcastReceiver","Exception:"+e.toString());
}
}
}
資源文件
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
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/btnTest"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="點擊播放馮希瑤過路人!"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
清單文件
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.edu.bnuz.wugo">
<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=".MyBroadcastReceiver">
//重啓觸發,但不一定好使
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
//時間的一般都好使
<intent-filter>
<action android:name="android.intent.action.TIME_SET" />
</intent-filter>
//自定義
<intent-filter>
<action android:name="cn.bnuz.edu.cn.SE_TEAM" />
</intent-filter>
</receiver>
</application>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"></uses-permission>
</manifest>
4、注意事項
1、新建資源文件raw,放入下載好的音樂
這裏注意,音樂的文件的名字要用英文
2、資源文件裏面的這三個觸發都是讓音樂播放,但是根據機器的效果不太一樣
3、要注意包名,我的包名是com.edu.bnuz.wugo
4、不要有反病毒軟件,不同機器看情況
5、本實驗只是爲了讓我們對廣播有了解,真正項目中應該不會利用這種方法播放音樂八