Android 寻呼机声音与图像不同步
所以基本上我想在用户滑动图像时播放一个简短的声音。这里有很多我拍摄的图像和声音。声音播放很好,但我的问题是我的声音与图像不匹配。可能我认为我没有在代码中实现OnPageChangeListener。有人能帮我吗?我该如何实现这段代码Android 寻呼机声音与图像不同步,android,android-viewpager,Android,Android Viewpager,所以基本上我想在用户滑动图像时播放一个简短的声音。这里有很多我拍摄的图像和声音。声音播放很好,但我的问题是我的声音与图像不匹配。可能我认为我没有在代码中实现OnPageChangeListener。有人能帮我吗?我该如何实现这段代码 package com.android.learning_numbers; import android.media.MediaPlayer; import android.os.Bundle; import android.os.IBinder; import
package com.android.learning_numbers;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.IBinder;
import android.app.Activity;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
public class Numbers extends Activity {
public class serv extends Service{
MediaPlayer mp;
public IBinder onBind1(Intent intent) {
// TODO Auto-generated method stub
return null;
}
public void onCreate()
{
mp = MediaPlayer.create(this, R.raw.jingle);
mp.setLooping(true);
}
public void onDestroy()
{
mp.stop();
}
public void onStart(Intent intent,int startid){
String tag = null;
Log.d(tag, "On start");
mp.start();
}
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
}
public static MediaPlayer mp = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_numbers);
ViewPager viewPager = (ViewPager)findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter();
viewPager.setAdapter(adapter);
}
private class ImagePagerAdapter extends PagerAdapter {
private int[] mImages = new int[]{R.drawable.no1,R.drawable.no2,R.drawable.no3,R.drawable.no4,R.drawable.no5,R.drawable.no6,R.drawable.no7,R.drawable.no8,R.drawable.no9,};
private int[] mAudio= new int[]{R.raw.one,R.raw.two,R.raw.three,R.raw.four,R.raw.five,R.raw.six,R.raw.seven,R.raw.eight,R.raw.nine};
@Override
public int getCount() {
return mImages.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = Numbers.this;
ImageView imageView = new ImageView(context);
int padding =context.getResources().
getDimensionPixelSize(R.dimen.activity_vertical_margin);
imageView.setPadding(padding, padding, padding, padding);
imageView.setScaleType(ImageView.ScaleType.CENTER);
imageView.setImageResource(mImages[position]);
((ViewPager) container).addView(imageView, 0);
//for Sound
if (mp != null) {
mp.reset();
mp.release();
}
//the audio files are running here but not in sync with image
mp = MediaPlayer.create(Numbers.this,mAudio[position]);
mp.start();
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
}
这里我如何使用OnPageChangeListener???您的问题是,每当您创建一个项目时,您都会播放声音,这可能与您更改为一个项目时不一定相同。您可以在类中定义OnPageChangeListener,如下所示:
public OnPageChangeListener mOnPageListener = new OnPageChangeListener() {
@Override public void onPageSelected(int position) {
//for Sound
if (mp != null) {
mp.reset();
mp.release();
}
//the audio files are running here but not in sync with image
mp = MediaPlayer.create(Numbers.this, mAudio[position]);
mp.start();
}
@Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
@Override public void onPageScrollStateChanged(int state) {}
};
然后,您只需将其连接到您的ViewPager:
setOnPageChangeListener(mOnPageListener)
我还建议您不要每次都重新创建MediaPlayer,而是为每个页面缓存它。我将它附加到我的viewpager,但它给出了错误(mOnPageListener)。。(mOnPageListener无法解析为变量)您需要将代码添加到Numbers类中。该错误意味着它无法从当前位置找到mOnPageListener成员变量。实际上,您确定导入了正确的类(OnPageChangeListener)?我已复制粘贴了您的代码并导入了该类(import android.support.v4.view.ViewPager.OnPageChangeListener;)在这一行上,OnPageChangeListener mOnPageListener=新建OnPageChangeListener()。。OnPageListener未被使用