当我在 Android Studio 中调用 prepareAsync() 时，我的 MediaPlayer 只播放一首歌曲

如何解决当我在 Android Studio 中调用 prepareAsync() 时，我的 MediaPlayer 只播放一首歌曲

除了已加载的 1 首歌曲外，我无法播放其他歌曲并单击它。

预期 - 我可以暂停和播放所有歌曲，当我点击一首歌曲时，其他歌曲会停止。

实际 - 我不能播放所有歌曲，只能随机播放一两首歌曲。 没有这样的警告和与之相关的问题。

我尝试使用 -

---

当 int 变量为 1 时，它们的可见性变得可见。

这是我的代码-

Java:-

public class MainActivity extends AppCompatActivity {
private Button button;
private Button button2;
private Button button3;
private SeekBar seekBar;
private SeekBar seekBar2;
private SeekBar seekBar3;
private MediaPlayer mediaPlayer;
private MediaPlayer mediaPlayer2;
private MediaPlayer mediaPlayer3;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button = findViewById(R.id.button);
    button2 = findViewById(R.id.button2);
    button3 = findViewById(R.id.button3);
    seekBar = findViewById(R.id.seekBar);
    seekBar2 = findViewById(R.id.seekBar2);
    seekBar3 = findViewById(R.id.seekBar3);
    Toast.makeText(this,"Loading ...",Toast.LENGTH_SHORT).show();
    mediaPlayer = new MediaPlayer();
    try {
        mediaPlayer.setDataSource("https://paglasongs.com/files/download/id/2094");
    } catch (IOException e) {
        e.printstacktrace();
    }
    mediaPlayer.setLooping(true);
    mediaPlayer.setonPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            Toast.makeText(MainActivity.this,"Ready to play!",Toast.LENGTH_SHORT).show();
            button.setVisibility(View.VISIBLE);
            seekBar.setVisibility(View.VISIBLE);
            seekBar.setMax(mediaPlayer.getDuration());
            seekBar.setonSeekBarchangelistener(new SeekBar.OnSeekBarchangelistener() {

                @Override
                public void onProgressChanged(SeekBar seekBar,int progress,boolean fromUser) {
                    if (fromUser){
                        mediaPlayer.seekTo(progress);
                    }
                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar) {

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar) {

                }
            });
        }
    });
    mediaPlayer.prepareAsync();
    button.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mediaPlayer.isPlaying()) {
                mediaPlayer.pause();
                button.setText("PLAY");
            } else {
                mediaPlayer.start();
                button.setText("PAUSE");
                button2.setText("PLAY");
                button3.setText("PLAY");
                mediaPlayer2.pause();
                mediaPlayer3.pause();
            }
        }
    });

    mediaPlayer2 = new MediaPlayer();
    try {
        mediaPlayer2.setDataSource("https://paglasongs.com/files/download/id/2110");
    } catch (IOException e) {
        e.printstacktrace();
    }
    mediaPlayer2.setLooping(true);
    mediaPlayer2.setonPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp2) {
            Toast.makeText(MainActivity.this,Toast.LENGTH_SHORT).show();
            button2.setVisibility(View.VISIBLE);
            seekBar2.setVisibility(View.VISIBLE);
            seekBar2.setMax(mediaPlayer2.getDuration());
            seekBar2.setonSeekBarchangelistener(new SeekBar.OnSeekBarchangelistener() {
                @Override
                public void onProgressChanged(SeekBar seekBar2,int progress2,boolean fromUser2) {
                    if (fromUser2){
                        mediaPlayer2.seekTo(progress2);
                    }
                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar2) {

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar2) {

                }
            });
        }
    });
    mediaPlayer2.prepareAsync();
    button2.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mediaPlayer2.isPlaying()) {
                mediaPlayer2.pause();
                button2.setText("PLAY");
            } else {
                mediaPlayer2.start();
                button2.setText("PAUSE");
                button.setText("PLAY");
                button3.setText("PLAY");
                mediaPlayer.pause();
                mediaPlayer3.pause();
            }
        }
    });

    mediaPlayer3 = new MediaPlayer();
    try {
        mediaPlayer3.setDataSource("https://paglasongs.com/files/download/id/324");
    } catch (IOException e) {
        e.printstacktrace();
    }
    mediaPlayer3.setLooping(true);
    mediaPlayer3.setonPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp3) {
            Toast.makeText(MainActivity.this,Toast.LENGTH_SHORT).show();
            button3.setVisibility(View.VISIBLE);
            seekBar3.setVisibility(View.VISIBLE);
            seekBar3.setMax(mediaPlayer3.getDuration());
            seekBar3.setonSeekBarchangelistener(new SeekBar.OnSeekBarchangelistener() {
                @Override
                public void onProgressChanged(SeekBar seekBar3,int progress3,boolean fromUser3) {
                    if (fromUser3){
                        mediaPlayer3.seekTo(progress3);
                    }
                }

                @Override
                public void onStartTrackingTouch(SeekBar seekBar3) {

                }

                @Override
                public void onStopTrackingTouch(SeekBar seekBar3) {

                }
            });
        }
    });
    mediaPlayer3.prepareAsync();
    button3.setonClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (mediaPlayer3.isPlaying()) {
                mediaPlayer3.pause();
                button3.setText("PLAY");
            } else {
                mediaPlayer3.start();
                button3.setText("PAUSE");
                button2.setText("PLAY");
                button.setText("PLAY");
                mediaPlayer.pause();
                mediaPlayer2.pause();
            }
        }
    });
}
}

清单

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.loopmusicplayeravi">
<uses-permission android:name="android.permission.INTERNET" />
<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/Theme.LoopMusicPlayer"
    android:usesCleartextTraffic="true"
    tools:targetApi="m">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

和 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">

<ScrollView
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <TextView
            android:id="@+id/textView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="@string/welcome_to_akplayer"
            android:textColor="#F44336"
            android:textSize="34sp"
            android:textStyle="bold" />

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="345dp"
            android:contentDescription="@string/music_img"
            app:srcCompat="@drawable/music" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/despacito"
            android:textSize="20sp"
            android:textStyle="bold" />

        <SeekBar
            android:id="@+id/seekBar"
            android:layout_width="291dp"
            android:layout_height="23dp"
            android:visibility="gone" />

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PLAY"
            android:visibility="gone" />

        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/shape_of_you"
            android:textSize="20sp"
            android:textStyle="bold" />

        <SeekBar
            android:id="@+id/seekBar2"
            android:layout_width="291dp"
            android:layout_height="23dp"
            android:visibility="gone" />

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PLAY"
            android:visibility="gone" />

        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/on_on"
            android:textSize="20sp"
            android:textStyle="bold" />

        <SeekBar
            android:id="@+id/seekBar3"
            android:layout_width="291dp"
            android:layout_height="23dp"
            android:visibility="gone" />

        <Button
            android:id="@+id/button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PLAY"
            android:visibility="gone" />

    </LinearLayout>
</ScrollView>

</androidx.constraintlayout.widget.ConstraintLayout>

我的英语不好，请跟我一起调整。 我正在使用 mediaPlayer 和 Android Studio。 任何帮助将不胜感激