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[英]In android Studio, I want when i click on button , next activity/fragment should come from right side
[英]When I call next fragment form current the tab selection will not change on Button click
我正在尝试开发一个Android应用程序,其中要包含带有片段的选项卡。 请在下面找到活动代码:
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Bundle;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import java.util.ArrayList;
import java.util.List;
public class EnterActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_enter);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
tabLayout.getTabAt(3).select();
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new EnterCodeFragment(), "ENTER CODE");
adapter.addFragment(new HistoryFragment(), "HISTORY");
adapter.addFragment(new HelpFragment(), "HELP");
adapter.addFragment(new LogoutFragment(), "LOGOUT");
viewPager.setAdapter(adapter);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private final List<Fragment> mFragmentList = new ArrayList<>();
private final List<String> mFragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(FragmentManager manager) {
super(manager);
}
@Override
public Fragment getItem(int position) {
return mFragmentList.get(position);
}
@Override
public int getCount() {
return mFragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
mFragmentList.add(fragment);
mFragmentTitleList.add(title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
}
在下面的逻辑中,我单击按钮时会调用其他片段。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.activity_main, container, false);
Button loginButton = (Button)v.findViewById(R.id.button);
loginButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
Fragment fragment = new EnterCodeFragment();
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.activity_main,fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
// ViewPagerAdapter.get
}
});
return v;
}
当我单击按钮时,它将移至下一个片段,但选项卡的选择不会更改。 我认为它正在创造一个新的片段 。 任何帮助,将不胜感激。
我认为您没有像上面的代码那样正确初始化片段
Button loginButton = (Button)v.findViewById(R.id.button);
loginButton.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view) {
EnterCodeFragment fragment = new EnterCodeFragment(); // check this
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.activity_main,fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
// ViewPagerAdapter.get
}
});
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