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TabLayout
是 Android Design Support Library 中的一個(gè)組件,用于實(shí)現(xiàn)帶有平滑過渡動(dòng)畫的水平滾動(dòng)選項(xiàng)卡
以下是如何在 TabLayout
中使用 Button
的簡單示例:
TabLayout
和 ViewPager
。 xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.tabs.TabLayout
android:id="@+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent" />
<androidx.viewpager.widget.ViewPager
android:id="@+id/view_pager"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="@id/tab_layout" />
</androidx.constraintlayout.widget.ConstraintLayout>
Fragment
,其中包含一個(gè) Button
。 android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click me!" />
</LinearLayout>
Fragment
類中設(shè)置按鈕的點(diǎn)擊事件。public class CustomFragment extends Fragment {
private Button button;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_custom, container, false);
button = view.findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// Handle button click
Toast.makeText(getActivity(), "Button clicked!", Toast.LENGTH_SHORT).show();
}
});
return view;
}
}
MainActivity
中設(shè)置 ViewPager
和 TabLayout
。public class MainActivity extends AppCompatActivity {
private TabLayout tabLayout;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tabLayout = findViewById(R.id.tab_layout);
viewPager = findViewById(R.id.view_pager);
setupViewPager();
}
private void setupViewPager() {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new CustomFragment(), "Tab 1");
adapter.addFragment(new CustomFragment(), "Tab 2");
adapter.addFragment(new CustomFragment(), "Tab 3");
viewPager.setAdapter(adapter);
tabLayout.setupWithViewPager(viewPager);
}
class ViewPagerAdapter extends FragmentPagerAdapter {
private List<Fragment> fragmentList = new ArrayList<>();
private List<String> fragmentTitleList = new ArrayList<>();
public ViewPagerAdapter(@NonNull FragmentManager fm) {
super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
}
@NonNull
@Override
public Fragment getItem(int position) {
return fragmentList.get(position);
}
@Override
public int getCount() {
return fragmentList.size();
}
public void addFragment(Fragment fragment, String title) {
fragmentList.add(fragment);
fragmentTitleList.add(title);
}
@Nullable
@Override
public CharSequence getPageTitle(int position) {
return fragmentTitleList.get(position);
}
}
}
這樣,當(dāng)用戶在 TabLayout
中切換選項(xiàng)卡時(shí),將顯示不同的 CustomFragment
實(shí)例。每個(gè) CustomFragment
都有一個(gè)可點(diǎn)擊的 Button
,點(diǎn)擊后會(huì)顯示一個(gè) Toast
消息。
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