일부 장치 Android에서 ViewPager가 작동하지 않음 (ViewPager not working on some devices Android)

문제 설명

일부 장치 Android에서 ViewPager가 작동하지 않음 (ViewPager not working on some devices Android)

한 활동을 다른 활동으로 스와이프하기 위해 ViewPager 및 Tabpageradapter를 사용하고 있지만 Android 4.0 버전 아래에서 예외를 찾을 수 없습니다.

MainActivity****:

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    // Initilization Viewpager in main activity
    viewPager = (ViewPager) findViewById(R.id.pager);
    actionBar = getActionBar();
    getActionBar().setHomeButtonEnabled(true);
    getActionBar().setDisplayHomeAsUpEnabled(true);

    mAdapter = new TabsPagerAdapter(getSupportFragmentManager());

    context = this.getApplicationContext();
    viewPager.setAdapter(mAdapter);
    actionBar.setHomeButtonEnabled(false);
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);        
    actionBar.setBackgroundDrawable(getResources().getDrawable(R.drawable.blackbox));
    actionBar.setStackedBackgroundDrawable(getResources().getDrawable(
            R.drawable.blackbox));

    // Adding Tabs
    for (String tab_name : tabs) {
        actionBar.addTab(actionBar.newTab().setText(tab_name)
                .setTabListener(this));
    }

    /**
     * on swiping the viewpager make respective tab selected
     * */
    viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageSelected(int position) {
            // on changing the page
            // make respected tab selected
            actionBar.setSelectedNavigationItem(position);
        }

        @Override
        public void onPageScrolled(int arg0, float arg1, int arg2) {
        }

        @Override
        public void onPageScrollStateChanged(int arg0) {
        }
    });
}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}

@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
    // on tab selected
    // show respected fragment view
    viewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}

TabsPagerAdapter.class :

//Class using for tabs 
public class TabsPagerAdapter extends FragmentPagerAdapter {

public TabsPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int index) {

    switch (index) {
    case 0:
        // Top Rated fragment activity that is the first activity to open
        return new PunjabiFragment();
    case 1:
        // Games fragment activity(Second activity to open
        return new HindiFragment();
    case 2:
        // Movies fragment activity(third activity to open
        return new EnglishFragment();
    }

    return null;
}

@Override
public int getCount() {
    // get item count ‑ equal to number of tabs
    return 3;
}

AndroidManifest.xml

<uses‑sdk
    android:minSdkVersion="7"
    android:targetSdkVersion="23" />

logcat에서 이 오류가 발생함:

참조 솔루션

방법 1:

Are you using <android.support.v4.view.ViewPager /> instead of <ViewPager /> in your xml file?

방법 2:

You might want to have a look at this and this. Min version for ViewPager is 4.0. For compatibility you can use the library in the link. The second link gives you the compatibility library.

방법 3:

Besides Sohaib's answer, pointing that you should use the compatibility library, if you are loading content from a web service, you may need to extend from FragmentStatePagerAdapter. I had some similar problem before and just changing the base PagerAdapter fixed the issue.

방법 4:

Carefully look at your onCreate method.

In my case I was checking for some permissions and using return; if the permission is not granted.

That is why I could not run my app on the marshmallow, but could run my app on the lower versions.

(by Neha、Octaviano Putra、Sohaib、Tomás Ruiz‑López、Sultan Ali)

참조 문서

1. ViewPager not working on some devices Android (CC BY‑SA 2.5/3.0/4.0)