Java 无法在模拟器中播放声音
我在一个“原始”文件中设置了一个声音。然而,当我把所有的东西放在一起时,emulator上原来的点击声音正在播放,而我的“鼠标点击”声音却没有 我已将鼠标单击声音设置为“sound1” 声音只有1秒长,我不知道这是否重要 主要活动Java 无法在模拟器中播放声音,java,android,android-studio,button,audio,Java,Android,Android Studio,Button,Audio,我在一个“原始”文件中设置了一个声音。然而,当我把所有的东西放在一起时,emulator上原来的点击声音正在播放,而我的“鼠标点击”声音却没有 我已将鼠标单击声音设置为“sound1” 声音只有1秒长,我不知道这是否重要 主要活动 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:ap
<?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>
看起来您已经在XML中实现了onClick,在Java中实现了setOnClickListener 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 您还可以添加AudioFocus请求。 这段代码有效:在我的例子中,我使用了一个片段类,但它可以用于任何活动
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);
}
}
}
好的,您是否尝试过实现AudioFocus请求?我将编辑我的答案,以包含播放媒体文件的工作代码。@Longhorns2102是否已修复?
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);
}
}
}