ViewPager在三星S4上非常慢。

解决了

显然，你需要将片段的可绘制资源放在相应的drawable-xhdpi等文件夹中，而不是drawable文件夹中。

我编写了一个包含三个片段的ViewPager，在LG G2、Sony Xperis S、Nexus4和5上完美运行。但在三星S4上，左右滑动时出现严重的延迟，我们在4台不同的S4上进行了测试，结果相同。

public class ViewPagerMainActivity extends FragmentActivity {
PageIndicator mIndicator;
int mViewPager;
private AutoScrollViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED,
                            WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.viewpager_layout);
    ViewPagerMyPagerAdapter pageAdapter = new ViewPagerMyPagerAdapter(getSupportFragmentManager());
    viewPager = (AutoScrollViewPager)findViewById(R.id.pager);
    viewPager.setAdapter(pageAdapter);
    CirclePageIndicator indicator = (CirclePageIndicator)findViewById(R.id.indicator);
    mIndicator = indicator;
    indicator.setViewPager(viewPager);
    final float density = getResources().getDisplayMetrics().density;
    indicator.setBackgroundColor(0xFFFFFFFF);
    indicator.setRadius(5 * density);
    indicator.setPageColor(0x00000000);
    indicator.setFillColor(0xFFFFFFFF);
    indicator.setStrokeColor(0xFFDE7900);
    indicator.setStrokeWidth(2 * density);
    viewPager.setInterval(3000);
    viewPager.startAutoScroll();
    viewPager.setScrollDurationFactor(12);
    viewPager.setCycle(true);
    TextView accept = (TextView)findViewById(R.id.textView3);
    TextView notNow = (TextView)findViewById(R.id.textView2);
    TextView img = (TextView) findViewById(R.id.terms);
    img.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent browserIntent = new Intent("android.intent.action.VIEW",
                Uri.parse("http://www.123on.com/legal"));
                    startActivity(browserIntent);
        }
    });
    accept.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {           
            ActivityMain.contactPermission = true;
            Logging.log("viewPager:"+ActivityMain.contactPermission);
            ActivityMain.mActivityMainHandler.saveParams();
            if (!ActivityMain.userVerifyFlag){ // user didn't verify phone number
                finish();
                ActivityMain.verifyPhoneNumber();
            } else {
                Logging.log("error: with verify flag true without permission true.");
            }
        }
    });
    notNow.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            finish();
        }
    });
}    
@Override
protected void onPause() {
    super.onPause();
    viewPager.stopAutoScroll();
}
@Override
protected void onResume() {
    super.onResume();
    viewPager.startAutoScroll();
}
@Override
protected void onDestroy() {
    super.onDestroy();
}
    }

和

public class ViewPagerMyPagerAdapter extends FragmentPagerAdapter implements OnPageChangeListener {
private List fragments;
public ViewPagerMyPagerAdapter(FragmentManager fm) {
    super(fm);
    this.fragments = new ArrayList();
    fragments.add(new ViewPagerFragmentOne());
    fragments.add(new ViewPagerFragmentTwo());
    fragments.add(new ViewPagerFragmentThree());
}
@Override
public Fragment getItem(int position) {
    return fragments.get(position);
}
@Override
public int getCount() {
    return fragments.size();
}
@Override
public void onPageScrollStateChanged(int arg0) {
    // TODO Auto-generated method stub
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
    // TODO Auto-generated method stub
}
@Override
public void onPageSelected(int arg0) {
    // TODO Auto-generated method stub
}

}

我开始怀疑三星在他们的框架中有一些严重的问题。

解决了

我在代码中重新调整了png的大小，而不是在xml中。

谢谢

/Gekn