我做了这个应用程序。这里使用了viewpager进行图像滑动和扫描。播放与图像匹配的声音。现在它工作正常,但只有问题是在第一页图像上它没有播放声音,因为页面在启动时不刷卡。我该如何解决这个问题?这是我的代码
public class Learning_Numbers extends Activity {
MediaPlayer mp;
MediaPlayer BG;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_numbers);
ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageArra);
ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager);
myPager.setAdapter(adapter);
myPager.setOnPageChangeListener(player);
myPager.setCurrentItem(0);
BG = MediaPlayer.create(this, R.raw.jingle);
BG.setLooping(true);
BG.setVolume(100, 100);
BG.start();
}
@Override
protected void onPause() {
super.onPause();
BG.pause();
}
@Override
protected void onResume() {
super.onResume();
BG.start();
}
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,R.raw.ten};
private int imageArra[] = { 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,R.drawable.no10};
OnPageChangeListener player = new OnPageChangeListener()
{
@Override
public void onPageSelected(int arg0)
{
mp = MediaPlayer.create(Learning_Numbers.this, mAudio[arg0]);
mp.start();
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2)
{
}
@Override
public void onPageScrollStateChanged(int arg0)
{
}
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
这里mp用于图像滑动声音& BG用于背景声音。
答案 0 :(得分:0)
查看viewpager的源代码。
void setCurrentItemInternal(int item, boolean smoothScroll, boolean always, int velocity) {
...
if (mFirstLayout) {
// We don't have any idea how big we are yet and shouldn't have any pages either.
// Just set things up and let the pending layout handle things.
mCurItem = item;
if (dispatchSelected && mOnPageChangeListener != null) {
mOnPageChangeListener.onPageSelected(item);
}
if (dispatchSelected && mInternalPageChangeListener != null) {
mInternalPageChangeListener.onPageSelected(item);
}
requestLayout();
...
// in setAdapter(), It will call setCurrentItemInternal() ..
所以,只需setOnPageChangeListener(播放器);在setAdapter之前。它可能会按预期工作。方便的技巧
答案 1 :(得分:0)
我试过创造这个&它对我有用..
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_numbers);
ViewPagerAdapter adapter = new ViewPagerAdapter(this, imageArra);
ViewPager myPager = (ViewPager) findViewById(R.id.myfivepanelpager);
myPager.setOnPageChangeListener(player);
myPager.setAdapter(adapter);
myPager.setCurrentItem(0);
BG = MediaPlayer.create(this, R.raw.jingle);
BG.setLooping(true);
BG.setVolume(100, 100);
BG.start();
mp = MediaPlayer.create(Numbers.this, mAudio[0]);
mp.start();
}
再次添加最后两行代码onSelect ..现在它对我来说很好..