[英]android-How to change sliding tab default position
this is my code for making sliding tab .It makes tabs perfectly . 这是我制作滑动标签的代码。它使标签完美。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.firstactivity);
// Get the ViewPager and set it's PagerAdapter so that it can display items
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
viewPager.setAdapter(new SampleFragmentPagerAdapter(getSupportFragmentManager(),FistActiivty.this));
// Give the SlidingTabLayout the ViewPager
SlidingTabLayout slidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
// Center the tabs in the layout
slidingTabLayout.setDistributeEvenly(true);
slidingTabLayout.setViewPager(viewPager);
slidingTabLayout.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return Color.RED;
//or return getResources().getColor(R.color.red);
}
});
}
class SampleFragmentPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 4;
private String tabTitles[] = new String[] { "Tab1", "Tab2", "Tab3" , "Tab4"};
private Context context;
public SampleFragmentPagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
@Override
public int getCount() {
return PAGE_COUNT;
}
@Override
public Fragment getItem(int position) {
Fragment fragment=null;
if (position==0){
fragment=new Fragment_A();
}
if (position==1){
fragment=new Fragment_B();
}
if (position==2){
fragment=new Fragment_C();
}
if (position==3){
fragment=new Fragment_C();
}
return fragment;
}
@Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
return tabTitles[position];
}
}
The question is ,How can I change the default selected tab when activity runs ? 问题是,活动运行时如何更改默认的选定选项卡? How can I change the default tab position to third when activity opens ? 活动打开时如何将默认标签位置更改为第三?
使用它,它将在加载时选择一个特定的选项卡
mViewPager.setCurrentItem(position);
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