我在我的 Activity 中添加了选项卡布局。一切正常，但选项卡指示器未按预期显示。我在下面添加照片，以便您了解。我的意思是说，当我单击“概述”时(选项卡指示器显示在“详细信息” fragment 下方)，反之亦然。
下面是 XML 代码(Activity_inventory_detail):
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/activity_inventory_detail_"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.github.fafaldo.fabtoolbar.widget.FABToolbarLayout
android:id="@+id/fabtoolbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:containerId="@+id/fabtoolbar_container"
app:fabId="@+id/fabtoolbar_fab"
app:fabToolbarId="@+id/fabtoolbar_toolbar"
app:fadeInFraction="0.2"
app:hideDuration="200"
app:horizontalMargin="16dp"
app:showDuration="600"
app:verticalMargin="16dp">
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="35dp"
android:background="@color/colorPrimary"
app:tabGravity="fill"
app:tabIndicatorColor="@color/white"
app:tabMaxWidth="0dp"
app:tabMode="fixed"
app:tabSelectedTextColor="@color/white"
app:tabTextColor="@color/white" />
<com.aaryanapps.hub.ui.controls.LockableViewPager
android:id="@+id/pager_inventory_detail"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@+id/tab_layout"
android:background="@color/white"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<RelativeLayout
android:id="@+id/fabtoolbar_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true">
<android.support.design.widget.FloatingActionButton
android:id="@+id/fabtoolbar_fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/abc_ic_menu_share_mtrl_alpha"
app:backgroundTint="@color/colorPrimary"
app:fabSize="mini" />
</RelativeLayout>
<LinearLayout
android:id="@+id/fabtoolbar_toolbar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
app:backgroundTint="@color/colorPrimary">
<ImageView
android:id="@+id/one"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:scaleType="centerInside"
android:src="@drawable/abc_ic_menu_share_mtrl_alpha" />
<ImageView
android:id="@+id/two"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:scaleType="centerInside"
android:src="@drawable/ic_menu_gallery_white" />
<ImageView
android:id="@+id/three"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:backgroundTint="@color/tranperent_white"
android:scaleType="centerInside"
android:src="@drawable/ic_menu_camera_white" />
</LinearLayout>
</com.github.fafaldo.fabtoolbar.widget.FABToolbarLayout>
</RelativeLayout>
下面给出了Java代码(Inventory_deatil_Activity.java)(不能贴出完整的代码，因为它有很多行)，只添加了Tablayout和相关部分。这是我声明 Tablayout 的代码。
公共(public)类 Inventory_detail_Activity extends AbstractKActivity 实现 DetailsDataListener, View.OnClickListener, SimpleGestureFilter.SimpleGestureListener, ContentManager.PickContentListener {
public static final String TAG_LABEL_OVERVIEW = "Overview";
public static final String TAG_LABEL_DETAILS = "Detail";
InventoryItemsList inventoryItems;
protected int current_item_index = 0;
public List<InventoryItem> inventory_items_list = new ArrayList<>();
InventoryItem inventory_item;
private ViewPager viewPager;
private ViewPagerAdapter pagerAdapter;
TabLayout tabLayout;
这是我初始化 Tablayout 的地方。
protected void init() {
final TabLayout tabLayout = (TabLayout)findViewById(R.id.tab_layout);
viewPager = (ViewPager) findViewById(R.id.pager_inventory_detail);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
下面是ViewPagerAdapter的代码
class ViewPagerAdapter extends SmartFragmentStatePagerAdapter<ItemDetailAbstractFragment> {
//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) {
ItemDetailAbstractFragment caf;
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
caf = new ItemDetailOverviewFragment();
break;
case 1: // Fragment # 0 - This will show FirstFragment different title
caf = new ItemDetailDetailsFragment();
break;
default:
return null;
}
Bundle args = ActivityStateManager.getInstance().getActivityState(getLocalClassName());
if (args == null) {
args = new Bundle();
}
caf.setFlowItem(inventory_item);
if(current_item_index == -1) {
caf.setFlowItem(inventory_item);
caf.populateData();
}
return caf;
}
@Override
public int getCount() {
return 2;
}
public void addFragment(int position, String title) {
mFragmentTitleList.add(position, title);
}
@Override
public CharSequence getPageTitle(int position) {
return mFragmentTitleList.get(position);
}
}
@Override
public void onPause() {
Log.e("DEBUG", "onPause of ClientListTabactivity");
super.onPause();
// currentState.putSerializable("flowItem",inventory_item);
// ActivityStateManager.getInstance().updateActivityState(getLocalClassName(), currentState);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
// outState.putSerializable("flowItem",inventory_item);
// ActivityStateManager.getInstance().updateActivityState(getLocalClassName(), outState);
contentManager.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
contentManager.onRestoreInstanceState(savedInstanceState);
}
private void setupViewPager(ViewPager viewPager) {
pagerAdapter = new ViewPagerAdapter(getSupportFragmentManager());
pagerAdapter.addFragment(0, TAG_LABEL_OVERVIEW);
pagerAdapter.addFragment(1, TAG_LABEL_DETAILS);
viewPager.setAdapter(pagerAdapter);
//updateFragmentsForFlowItem();
}
[已编辑]:
这是 AbstractActivity 代码:
公共(public)类 AbstractKActivity 扩展 AppCompatActivity {
protected int content_view = 0;
protected String mTitle = "";
protected TextView title;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
prepareInit();
if (content_view != 0) {
setContentView(content_view);
}
initToolbar();
processIntent();
init();
}
protected void initToolbar() {
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.custom_actionbar);
title=(TextView)findViewById(getResources().getIdentifier("action_bar_title", "id", getPackageName()));
title.setText(mTitle);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// getSupportActionBar().setTitle(mTitle);
}
protected void processIntent() {
}
protected void init() {
}
protected void prepareInit() {
}
protected void setToolbarTitleText(String titleText) {
mTitle = titleText;
title.setText(titleText);
}
最佳答案
首先修改你的CODE。不要 return null; 。您应该返回您的默认 fragment 。
不要
case 1: // Fragment # 0 - This will show FirstFragment different title
caf = new ItemDetailDetailsFragment();
break;
default:
return null;
做
@Override
public Fragment getItem(int position) {
ItemDetailAbstractFragment caf;
switch (position) {
case 0: // Fragment # 0 - This will show FirstFragment
caf = new ItemDetailOverviewFragment();
break;
case 1: // Fragment # 0 - This will show FirstFragment different title
caf = new ItemDetailDetailsFragment();
break;
default:
return new ItemDetailOverviewFragment();
}
其次
viewPager = (ViewPager) findViewById(R.id.pager_inventory_detail);
setupViewPager(viewPager);
tabLayout.setupWithViewPager(viewPager);
viewPager.setCurrentItem(0); // Declare this
编辑
public void onTabSelected(TabLayout.Tab tab) {
tab.select();
}
关于java - tabIndicator 显示不正确(它以相反的方式显示)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45563859/