我有一个程序可以播放鼓包中的样本。当我在一部手机上尝试但另一部手机（点击正在注册并执行振动）时，它的功能非常完美。声音没有播放。如果代码是正确的，为什么它在其他设备中无法正常工作？！这是代码......
import java.util.HashMap;
import java.util.Map;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.SoundPool;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.View;
import com.example.android.searchabledict.R;
public class GameMain extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.game_main);
// Initialise SoundPool to play the drum sample sounds
soundPoolDrums = new SoundPool (8, AudioManager.STREAM_MUSIC, 0);
// Create HashMap of sounds
soundMap = new HashMap<Integer, Integer>();
}
// Constants and variables for storing sounds for drumkit
public static final int HIHAT_SOUND_ID=0;
public static final int RIDE_SOUND_ID=1;
public static final int CYMBAL_SOUND_ID=2;
public static final int BASS_SOUND_ID=3;
public static final int SNARE_SOUND_ID=4;
public static final int TOMTOMA_SOUND_ID=5;
public static final int TOMTOMB_SOUND_ID=6;
public static final int TOMTOMC_SOUND_ID=7;
private SoundPool soundPoolDrums;
private Map<Integer, Integer> soundMap;
/*
* The next section manages the playback of drum samples
*/
// High-hat sample player
public void HatOne (View view) {
soundMap.put(HIHAT_SOUND_ID, soundPoolDrums.load(this, R.raw.drumhata, 1));
soundPoolDrums.play(soundMap.get(HIHAT_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Ride sample player
public void HatTwo (View view) {
soundMap.put(RIDE_SOUND_ID, soundPoolDrums.load(this, R.raw.drumhatc, 1));
soundPoolDrums.play(soundMap.get(RIDE_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Crash sample player
public void Crash (View view) {
soundMap.put(CYMBAL_SOUND_ID, soundPoolDrums.load(this, R.raw.drumcrash, 1));
soundPoolDrums.play(soundMap.get(CYMBAL_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Bass sample player
public void KickDrum (View view) {
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(200);
soundMap.put(BASS_SOUND_ID, soundPoolDrums.load(this, R.raw.drumkick, 1));
soundPoolDrums.play(soundMap.get(BASS_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Snare sample player
public void SnareDrum (View view) {
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(150);
soundMap.put(SNARE_SOUND_ID, soundPoolDrums.load(this, R.raw.drumsnare, 1));
soundPoolDrums.play(soundMap.get(SNARE_SOUND_ID), 1, 1, 1, 0, 1f);
}
// High tom sample player
public void TomOne (View view) {
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(120);
soundMap.put(TOMTOMA_SOUND_ID, soundPoolDrums.load(this, R.raw.drumtom1, 1));
soundPoolDrums.play(soundMap.get(TOMTOMA_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Mid tom sample player
public void TomTwo (View view) {
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(120);
soundMap.put(TOMTOMB_SOUND_ID, soundPoolDrums.load(this, R.raw.drumtom2, 1));
soundPoolDrums.play(soundMap.get(TOMTOMB_SOUND_ID), 1, 1, 1, 0, 1f);
}
// Low tom sample player
public void TomThree (View view) {
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(120);
soundMap.put(TOMTOMC_SOUND_ID, soundPoolDrums.load(this, R.raw.drumtom3, 1));
soundPoolDrums.play(soundMap.get(TOMTOMC_SOUND_ID), 1, 1, 1, 0, 1f);
}
// End of sample players section
// Handlers for Back buttons
// If tactile back button is pressed then the user is returned to the home screen
@Override
public void onBackPressed(){
soundPoolDrums.release();
soundPoolDrums = null;
// play back sound
MediaPlayer mMediaPlayer = MediaPlayer.create(this, R.raw.soundbackbutton) ;
mMediaPlayer.start();
// short vibration
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(200);
Intent s = new Intent (this, Main.class);
startActivity(s);
}
// Handler for back button
public void BackButton (View view) {
soundPoolDrums.release();
soundPoolDrums = null;
MediaPlayer mMediaPlayer = MediaPlayer.create(this, R.raw.soundbackbutton) ;
mMediaPlayer.start();
Vibrator vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vib.vibrate(200);
Intent s = new Intent (this, Main.class);
startActivity(s);
}
}
和XML
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/fabricblacksmr">
<ImageButton
android:id="@+id/BackButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:onClick="BackButton"
android:src="@drawable/buttonhome"
android:layout_margin="8dp"
android:background="#00000000" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginLeft="60dp"
android:layout_marginRight="20dp"
android:layout_marginTop="5dp"
android:text="@string/gamemaintext" />
<TableRow
android:id="@+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<ImageButton
android:id="@+id/imageButtongame1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:onClick="HatOne"
android:src="@drawable/dhihats" />
<ImageButton
android:id="@+id/imageButtongame2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:src="@drawable/dride"
android:onClick="HatTwo"
android:background="#00000000"/>
<ImageButton
android:id="@+id/imageButtongame3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:src="@drawable/dcrash"
android:onClick="Crash"
android:background="#00000000"/>
</TableRow>
<TableRow
android:id="@+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageButton
android:id="@+id/imageButtongame4"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="KickDrum"
android:src="@drawable/dbassdrum"
android:background="#00000000" />
<ImageButton
android:id="@+id/imageButtongame5"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/dsnare"
android:onClick="SnareDrum"
android:background="#00000000"/>
</TableRow>
<TableRow
android:id="@+id/tableRow3"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<ImageButton
android:id="@+id/imageButtongame6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:src="@drawable/dtom1"
android:onClick="TomOne"
android:background="#00000000"/>
<ImageButton
android:id="@+id/imageButtongame7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:src="@drawable/dtom2"
android:onClick="TomTwo"
android:background="#00000000"/>
<ImageButton
android:id="@+id/imageButtongame8"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="15dp"
android:src="@drawable/dtom3"
android:onClick="TomThree"
android:background="#00000000"/>
</TableRow>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:text="@string/filsdrum"/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginLeft ="120dp"
android:text="@string/copyright"/>
</TableLayout>