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我想在选择页面时在viewpager上显示消息并播放声音。我看到下一条消息。如果选择了页面（图片1 - 声音2，图片2 - 声音3 ...） 我想在选择页面时播放声音（图片1 - 声音1，图片2 - 声音2，....）问题在哪里？ 谢谢，Viewpager无法正常工作
Viewpager;
package com.example.messages;
import android.app.Activity;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
public class Pictures extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.picturespage);
MyPagerAdapter adapter = new MyPagerAdapter();
ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager);
myPager.setAdapter(adapter);
myPager.setCurrentItem(0);
}
};
Mypageradapter;
package com.example.messages;
import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;
import android.media.SoundPool.OnLoadCompleteListener;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Toast;
public class MyPagerAdapter extends PagerAdapter{
SoundPool snd;
int sound1,sound2,sound3;
boolean loaded = false;
public int getCount() {
return 6;
}
public Object instantiateItem(View collection, int position) {
View view=null;
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// Set volume rocker mode to media volume
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
snd = new SoundPool(6, AudioManager.STREAM_MUSIC, 0);
snd.setOnLoadCompleteListener(new OnLoadCompleteListener() {
public void onLoadComplete(SoundPool soundPool, int sampleId,
int status) {
loaded = true;
}
});
sound1 = snd.load(collection.getContext(), R.raw.sound1, 1);
sound2 = snd.load(collection.getContext(), R.raw.sound2, 1);
sound3 = snd.load(collection.getContext(), R.raw.sound3, 1);
int resId = 0;
switch (position) {
case 0:
resId = R.layout.picture1;//
view = inflater.inflate(resId, null);
if (loaded) {
snd.play(sound1, 1, 1, 1, 0, 1f);
Toast.makeText(collection.getContext(), "Sound1", Toast.LENGTH_SHORT).show();
}
break;
case 1:
resId = R.layout.picture2; //
view = inflater.inflate(resId, null);
if (loaded) {
snd.play(sound2, 1, 1, 1, 0, 1f);
Toast.makeText(collection.getContext(), "Sound2", Toast.LENGTH_SHORT).show();
}
break;
case 2:
resId = R.layout.picture3;//
view = inflater.inflate(resId, null);
if (loaded) {
snd.play(sound3, 1, 1, 1, 0, 1f);
Toast.makeText(collection.getContext(), "Sound3", Toast.LENGTH_SHORT).show();
}
break;
case 3:
resId = R.layout.picture4;//
view = inflater.inflate(resId, null);
Toast.makeText(collection.getContext(), "Test4", Toast.LENGTH_SHORT).show();
break;
case 4:
resId = R.layout.picture5;//
view = inflater.inflate(resId, null);
Toast.makeText(collection.getContext(), "Test5", Toast.LENGTH_SHORT).show();
break;
case 5:
resId = R.layout.picture6;//
view = inflater.inflate(resId, null);
Toast.makeText(collection.getContext(), "Test6", Toast.LENGTH_SHORT).show();
break;
}
((ViewPager) collection).addView(view, 0);
return view;
}
@SuppressWarnings("unused")
private Context getApplicationContext() {
// TODO Auto-generated method stub
return null;
}
private void setVolumeControlStream(int streamMusic) {
// TODO Auto-generated method stub
}
@SuppressWarnings("unused")
private Context getBaseContext() {
// TODO Auto-generated method stub
return null;
}
@SuppressWarnings("unused")
private PagerAdapter findViewById(int myfivepanelpager) {
// TODO Auto-generated method stub
return null;
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView((View) arg2);
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == ((View) arg1);
}
@Override
public Parcelable saveState() {
return null;
}
public static Integer getItem(int position) {
// TODO Auto-generated method stub
return null;
}
}