无法在模拟器中播放声音

Question

我在"原始"文件中设置了声音。但是，当我将所有内容放在一起时，模拟器上的原始点击声音正在播放，但我的"鼠标点击"声音没有。

我将鼠标点击声音设置为"声音1"。

声音只有 1 秒长，我不知道这是否重要。

activity_main

<?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"
android:orientation="vertical"
android:gravity="center"
tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Activity1" />
<ImageButton
android:id="@+id/Special_Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:src="@drawable/button_images"
android:onClick="playSound"/>
</LinearLayout>

主要活动

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
AudioAttributes audioAttributes = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
.build();
soundPool = new SoundPool.Builder()
.setMaxStreams(1)
.setAudioAttributes(audioAttributes)
.build();

} else {
soundPool = new SoundPool(1, AudioManager.STREAM_MUSIC,
0);
}
sound1 = soundPool.load(this, R.raw.sound1, 1);
button = findViewById(R.id.Special_Button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
openActivity2();
}
});
}
public void openActivity2() {
Intent intent = new Intent(this, Activity2.class);
startActivity(intent);
}
public void playSound(View v) {
soundPool.play(R.raw.sound1, 1,1,0
,0,1);
}
@Override
protected void onDestroy() {
super.onDestroy();
soundPool.release();
soundPool = null;
}
}

Answer 1

看起来你已经在XML中实现了onClick，并在Java中实现了setOnClickListener。

因此，据我所知，您的代码正在运行onClickListener，它正在启动openActivity2((方法，并跳过playSound((方法。

尝试删除 XML 中的 onClick，并将 playSound(( 集成到setOnClickListener中。

您也可以添加音频焦点请求。 这段代码有效：就我而言，我使用了一个片段类，但它可以在任何活动中使用。

import android.content.Context;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;

public class fragment1 extends Fragment {
//These are the declarations
Button btn;
MediaPlayer mMediaPlayer;
private AudioManager mAudioManager;
//This tells the media player what to do if AudioFocus is changed
private AudioManager.OnAudioFocusChangeListener 
mOnAudioFocusChangeListener =
new AudioManager.OnAudioFocusChangeListener() {
@Override
public void onAudioFocusChange(int focusChange) {
if (focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT ||
focusChange ==   AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK){
mMediaPlayer.pause();
mMediaPlayer.seekTo(0);
} else if (focusChange == AudioManager.AUDIOFOCUS_GAIN){
mMediaPlayer.start();
}else if (focusChange == AudioManager.AUDIOFOCUS_LOSS){
releaseMediaPlayer();
}
}
};
//This tells the media player what to do when the playback is done
private MediaPlayer.OnCompletionListener mOnCompletionListener = new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
releaseMediaPlayer();
}
};
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view =  inflater.inflate(R.layout.**YOUR LAYOUT HERE**,container,false);
//This assigns the audio manager to this view 
mAudioManager = (AudioManager) getActivity().getSystemService(Context.AUDIO_SERVICE);
btn = view.findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
/* First calls the releaseMediaPlayer() method to make sure there
* are no other instances of the media player that exist. 
*/
releaseMediaPlayer();
//This requests the AudioFocus
int result = mAudioManager.requestAudioFocus(mOnAudioFocusChangeListener,
AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
//This if statement deals with the above request
if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED){
mMediaPlayer = MediaPlayer.create(getActivity(), **YOUR MEDIA RESOURCE HERE**);
mMediaPlayer.start();
mMediaPlayer.setOnCompletionListener(mOnCompletionListener);
}
}
});

return view;
}
//This tells the media player to stop if the app is closed
@Override
public void onStop(){
super.onStop();
releaseMediaPlayer();
}
//This method is to release the instance of the media player
private void releaseMediaPlayer(){
if (mMediaPlayer != null){
mMediaPlayer.release();
mMediaPlayer = null;
mAudioManager.abandonAudioFocus(mOnAudioFocusChangeListener);
}
}
}