Question

尝试通过点击事件在底部导航栏中打开第二个选项卡。在firstview工具栏searchview中发生单击。当我尝试单击搜索按钮时，它没有移至第二个视图。但是，如果我尝试单击正常，则效果很好。仅当我单击仅搜索视图时，才会出现视图问题。谁能帮助我。

编辑：换句话说，我已经在工具栏中启用了searchview。如果我单击键盘上的搜索视图，它将调用（onQueryTextSubmit）方法。在这种方法中，我需要切换片段。（意味着如果在家庭碎片中，如果我单击搜索按钮，它应该重定向到仪表板片段）

MainActivity

public class MainActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //loading the default fragment
        loadFragment(new HomeFragment());

        //getting bottom navigation view and attaching the listener
        BottomNavigationView navigation = findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(this);
    }


    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        Fragment fragment = null;

        switch (item.getItemId()) {
            case R.id.navigation_home:
                fragment = new HomeFragment();
                break;

            case R.id.navigation_dashboard:
                fragment = new DashboardFragment();
                break;

            case R.id.navigation_notifications:
                fragment = new NotificationsFragment();
                break;

        }

        return loadFragment(fragment);
    }

    private boolean loadFragment(Fragment fragment) {
        //switching fragment
        if (fragment != null) {
            getSupportFragmentManager()
                    .beginTransaction()
                    .replace(R.id.fragment_container, fragment)
                    .commit();
            return true;
        }
        return false;
    }
}
```

activity_main

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <FrameLayout
        android:id="@+id/fragment_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="56dp"
        android:text="@string/title_home"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.design.widget.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/navigation" />

</android.support.constraint.ConstraintLayout>

HomeFragment

public class HomeFragment extends Fragment {
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        //just change the fragment_dashboard
        //with the fragment you want to inflate
        //like if the class is HomeFragment it should have R.layout.home_fragment
        //if it is DashboardFragment it should have R.layout.fragment_dashboard
        setHasOptionsMenu(true);
        getActivity().setTitle("your title");
        return inflater.inflate(R.layout.fragment_home, null);
    }
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        menu.clear();

        inflater.inflate(R.menu.menu, menu);
        MenuItem item = menu.findItem(R.id.action_search);
        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW | MenuItem.SHOW_AS_ACTION_IF_ROOM);

        SearchView searchView = (SearchView) item.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String query) {
                Fragment fragment = new DashboardFragment();
                FragmentTransaction transaction = getFragmentManager().beginTransaction();
                transaction.replace(R.id.navigation_dashboard, fragment);
                transaction.addToBackStack(null);
                transaction.commit();
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                // Here is where we are going to implement the filter logic
                return true;
            }

        });
    }


}

DashboardFragment.java

public class DashboardFragment extends Fragment {
    public DashboardFragment() {
    }

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        //just change the fragment_dashboard
        //with the fragment you want to inflate
        //like if the class is HomeFragment it should have R.layout.home_fragment
        //if it is DashboardFragment it should have R.layout.fragment_dashboard
        return inflater.inflate(R.layout.fragment_dashboard, null);
    }
}

fragment_Dashboard

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Home"
        android:textAppearance="@style/Base.TextAppearance.AppCompat.Large" />
</LinearLayout>

这些是视图的图像。

Answer 1

您必须在Mainactivity中以以下方式实施searchView实施：遵循

public class MainActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //loading the default fragment
        loadFragment(new HomeFragment());

        //getting bottom navigation view and attaching the listener
        BottomNavigationView navigation = findViewById(R.id.navigation);
        navigation.setOnNavigationItemSelectedListener(this);
    }


    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
        Fragment fragment = null;

        switch (item.getItemId()) {
            case R.id.navigation_home:
                fragment = new HomeFragment();
                break;

            case R.id.navigation_dashboard:
                fragment = new DashboardFragment();
                break;

            case R.id.navigation_notifications:
                fragment = new NotificationsFragment();
                break;

        }

        return loadFragment(fragment);
    }

    private boolean loadFragment(Fragment fragment) {
        //switching fragment
        if (fragment != null) {
            getSupportFragmentManager()
                    .beginTransaction()
                    .replace(R.id.fragment_container, fragment)
                    .commit();
            return true;
        }
        return false;
    }


   @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        menu.clear();

        inflater.inflate(R.menu.menu, menu);
        MenuItem item = menu.findItem(R.id.action_search);
        item.setShowAsAction(MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW | MenuItem.SHOW_AS_ACTION_IF_ROOM);

        SearchView searchView = (SearchView) item.getActionView();
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

            @Override
            public boolean onQueryTextSubmit(String query) {
                Fragment fragment = new DashboardFragment();
                FragmentTransaction transaction = getFragmentManager().beginTransaction();
                transaction.replace(R.id.navigation_dashboard, fragment);
                transaction.addToBackStack(null);
                transaction.commit();
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                // Here is where we are going to implement the filter logic
                return true;
            }

        });


 searchView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        getSupportFragmentManager()
                .beginTransaction()
                //here whenever you click on searchview you will redirected to dashboard fragment 
                .replace(R.id.fragment_container, new DashBoardFragment())
                .commit();
    }
});
    }

}

尝试这种方式。希望它对您有用

点击工具栏中的搜索按钮后，视图无法正确显示

1 个答案: