其实我是Android的新手并且陷入了导航抽屉.. 我已成功设计了材料设计的导航抽屉及其菜单项。 但是，当我点击该菜单时，它会打开一个独立的片段，而我希望它在Tab Layout中的特定选项卡中打开它。
我使用自定义适配器制作了单独的Tab布局。 mytablayout .xml文件为
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
app:tabGravity="fill"
app:tabMode="fixed"
app:elevation="0dp"
android:background="#6ec6c5"
app:tabIndicatorColor="#000000"
app:tabSelectedTextColor="@color/textColor"
app:tabTextColor="#A8DCDC"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize">
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v4.view.ViewPager>
</LinearLayout>
我的Tabfragment类就在那里：
public class TabFragment extends Fragment {
public static TabLayout tabLayout;
public static ViewPager viewPager;
public static int int_items = 3;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
/**
*Inflate tab_layout and setup Views.
*/
View x = inflater.inflate(R.layout.fragment_tab, null);
tabLayout = (TabLayout) x.findViewById(R.id.tabs);
viewPager = (ViewPager) x.findViewById(R.id.viewpager);
/**
*Set an Apater for the View Pager
*/
viewPager.setAdapter(new MyAdapter(getChildFragmentManager(),int_items ));
/**
* Now , this is a workaround ,
* The setupWithViewPager dose't works without the runnable .
* Maybe a Support Library Bug .
*/
tabLayout.post(new Runnable() {
@Override
public void run() {
tabLayout.setupWithViewPager(viewPager);
}
});
return x;
}
}
MyAdapter is :
public class MyAdapter extends FragmentPagerAdapter {
int int_items;
public MyAdapter(FragmentManager fm,int int_items) {
super(fm);
this.int_items = int_items;
}
/**
* Return fragment with respect to Position .
*/
@Override
public Fragment getItem(int position)
{
switch (position){
case 0 : return new ProductFragment();
case 1 : return new ProductFragment();
case 2 : return new ProductFragment();
}
return null;
}
@Override
public int getCount() {
return int_items;
}
/**
* This method returns the title of the tab according to the position.
*/
@Override
public CharSequence getPageTitle(int position) {
switch (position){
case 0 :
return "PRODUCTS";
case 1 :
return "FEATURED";
case 2 :
return "FAVOURITES";
}
return null;
}
}
我的SplitviewActivity显示如下：
public class SplitViewActivity extends AppCompatActivity {
private DrawerLayout mDrawerLayout;
private NavigationView navigationView;
FragmentManager mFragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_split_view);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setHomeAsUpIndicator(R.drawable.menu);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView = (NavigationView) findViewById(R.id.navigation_view);
getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, new TabFragment()).commit();
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
menuItem.setChecked(true);
mDrawerLayout.closeDrawers();
switch (menuItem.getItemId()) {
case R.id.navigation_item_products:
getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, new TabFragment()).commit();
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
// updateDisplay(new AttachmentFragment());
break;
case R.id.navigation_item_new_Releases:
getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, new ProductFragment()).commit();
/* FragmentTransaction fragmentTransaction = mFragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.frame_container,new ProductFragment()).commit();*/
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
// updateDisplay(new ImageFragment());
break;
case R.id.navigation_item_favorites:
getSupportFragmentManager().beginTransaction().replace(R.id.frame_container, new TabFragment()).commit();
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
// updateDisplay(new MyLocationFragment());
break;
case R.id.navigation_item_about_us:
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
// updateDisplay(new MyLocationFragment());
break;
case R.id.navigation_item_notification:
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
// updateDisplay(new MyLocationFragment());
break;
case R.id.navigation_sub_item_01:
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 01 Clicked", Toast.LENGTH_SHORT).show();
break;
case R.id.navigation_sub_item_02:
Toast.makeText(SplitViewActivity.this, "Navigation Sub Item 02 Clicked", Toast.LENGTH_SHORT).show();
break;
}
return true;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_splash_screen, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id) {
case android.R.id.home:
mDrawerLayout.openDrawer(GravityCompat.START);
return true;
case R.id.action_settings:
return true;
}
return super.onOptionsItemSelected(item);
}
}
我的导航菜单item.xml文件如下：
<?xml version="1.0" encoding="utf-8"?>
<group android:checkableBehavior="single">
<item
android:id="@+id/navigation_item_products"
android:checked="true"
android:title="Products" />
<item
android:id="@+id/navigation_item_new_Releases"
android:title="New Releases" />
<item
android:id="@+id/navigation_item_favorites"
android:title="favorites" />
<item
android:id="@+id/navigation_item_about_us"
android:title="About Us" />
<item
android:id="@+id/navigation_item_notification"
android:title="Notifications" />
</group>
<item android:title="">
<menu>
<item
android:id="@+id/navigation_sub_item_01"
android:title="Configure" />
<item
android:id="@+id/navigation_sub_item_02"
android:title="Logout" />
</menu>
</item>
一切都很好。除了。所有三个标签已经显示。导航抽屉也运作良好。
只有我无法理解如何在点击导航菜单项时在标签中打开片段。当我点击菜单项时，它会打开一个不在标签中的独立片段。我怎么能实现这个..任何帮助都会得到高级评估..
答案 0 :(得分：1)
只需检查抽屉onClick点击的位置，然后针对每个viewpager标签检查哪个标签符合您的要求并使用Viewpager.setCurrentItem(posiition)
导航到该标签。
public void setStartTab(String topTab) {
LocalLog.e("TOPTAB",topTab+"");
if(topTab==null){
mViewPager.setCurrentItem(0);
}else{
for(int i=0;i<mTabs.size();i++){
LocalLog.e("TOPTAB",mTabs.get(i).name);
if(mTabs.get(i).name.equalsIgnoreCase(topTab)){
LocalLog.e("TOPTAB",i+"true");
mViewPager.setCurrentItem(i);
}
}
}
}
答案 1 :(得分：0)
activity_main.xml
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabMode="fixed"
app:tabGravity="fill"/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
`
public class MainActivity extends AppCompatActivity {
private Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
viewPager = (ViewPager) findViewById(R.id.viewpager);
setupViewPager(viewPager);
tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(viewPager);
}
private void setupViewPager(ViewPager viewPager) {
ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());
adapter.addFragment(new OneFragment(), "ONE");
adapter.addFragment(new TwoFragment(), "TWO");
adapter.addFragment(new ThreeFragment(), "THREE");
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);
}
}
}
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