Question

我有一个xml文件（fragment_about_sl），其中我添加了一个coordinatorLayout。下面给出了代码。添加并在设备上运行应用程序后，特定的布局显示了两个工具栏。我认为一个是在MainActivity.java和另一个是在coordinatorLayout中创建的空白工具栏。我使用了一个扩展到fragment.java的类作为fragment_about_sl.xml，扩展到的原因是因为我使用了navigationDrawer。

我想知道如何删除默认工具栏并将其替换为在coordinatorLayout中创建的工具栏。另外，当我运行应用程序时，在coordinatorLayout中创建的工具栏是空白的。我想要让所有内容都包含在内默认工具栏，它是汉堡图标，布局名称和新工具栏中的3个点设置。

fragment_about_sl

<android.support.design.widget.CoordinatorLayout                 
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:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="com.birjuvachhani.myapplication.ScrollingActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="@dimen/app_bar_height"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            app:titleEnabled="false"
            app:contentScrim="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|exitUntilCollapsed"
            app:toolbarId="@+id/toolbar">

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_collapseMode="parallax">

                    <android.support.v4.view.ViewPager
                        android:id="@+id/viewPager"
                        android:layout_width="match_parent"
                        android:layout_height="250dp" />

                    <LinearLayout
                        android:id="@+id/SliderDots"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_alignBottom="@id/viewPager"
                        android:layout_marginBottom="20dp"
                        android:gravity="center_horizontal"
                        android:orientation="horizontal" />

            </RelativeLayout>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

</android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>

<android.support.v4.widget.NestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" >

    <!-- Main content goes here. -->

</android.support.v4.widget.NestedScrollView>

aboutSLFragment.java

public class aboutSLFragment extends Fragment{

ViewPager viewPager;
LinearLayout sliderDotspanel;
private int dotscount;
private ImageView[] dots;
TextView aboutslintro;
Button readmorebtn1;
TextView aboutslhistory;
Button readmorebtn2;
TextView aboutslquickfacts;
Button readmorebtn3;

public aboutSLFragment() {
    // Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.fragment_about_sl, container, false);
    viewPager = (ViewPager) rootView .findViewById(R.id.viewPager);

    sliderDotspanel = (LinearLayout)rootView.findViewById(R.id.SliderDots);

    ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getContext());

    viewPager.setAdapter(viewPagerAdapter);

    dotscount = viewPagerAdapter.getCount();
    dots = new ImageView[dotscount];

    for(int i = 0; i < dotscount; i++){

        dots[i] = new ImageView(getContext());
        dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.non_active_dot));

        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

        params.setMargins(8, 0, 8, 0);

        sliderDotspanel.addView(dots[i], params);

    }

    dots[0].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.active_dot));

    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

        }

        @Override
        public void onPageSelected(int position) {

            for(int i = 0; i< dotscount; i++){
                dots[i].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.non_active_dot));
            }

            dots[position].setImageDrawable(ContextCompat.getDrawable(getContext(), R.drawable.active_dot));

        }

        @Override
        public void onPageScrollStateChanged(int state) {

        }
    });

    aboutslintro=(TextView)rootView.findViewById(R.id.aboutslintro);
    readmorebtn1=(Button)rootView.findViewById(R.id.readmorebtn1);
    readmorebtn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (readmorebtn1.getText().toString().equalsIgnoreCase("Read 
More"))
            {
                aboutslintro.setMaxLines(Integer.MAX_VALUE);//your TextView
                readmorebtn1.setText("Read Less");
            }
            else
            {
                aboutslintro.setMaxLines(5);//your TextView
                readmorebtn1.setText("Read More");
            }
        }
    });

    aboutslhistory=(TextView)rootView.findViewById(R.id.aboutslhistory);
    readmorebtn2=(Button)rootView.findViewById(R.id.readmorebtn2);
    readmorebtn2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (readmorebtn2.getText().toString().equalsIgnoreCase("Read 
More"))
            {
                aboutslhistory.setMaxLines(Integer.MAX_VALUE);//your 
TextView
                readmorebtn2.setText("Read Less");
            }
            else
            {
                aboutslhistory.setMaxLines(5);//your TextView
                readmorebtn2.setText("Read More");
            }
        }
    });

    aboutslquickfacts=
(TextView)rootView.findViewById(R.id.aboutslquickfacts);
    readmorebtn3=(Button)rootView.findViewById(R.id.readmorebtn3);
    readmorebtn3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (readmorebtn3.getText().toString().equalsIgnoreCase("Read 
More"))
            {
                aboutslquickfacts.setMaxLines(Integer.MAX_VALUE);//your 
TextView
                readmorebtn3.setText("Read Less");
            }
            else
            {
                aboutslquickfacts.setMaxLines(5);//your TextView
                readmorebtn3.setText("Read More");
            }
        }
    });
    // Inflate the layout for this fragment
    return rootView;
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    //you can set the title for your toolbar here for different fragments 
different titles
    getActivity().setTitle("About Sri Lanka");
}

}

MainActivity.java

public class MainActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);


    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, 
R.string.navigation_drawer_close);
    drawer.addDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) 
findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    displaySelectedScreen(R.id.nav_home);
}

@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}


private void displaySelectedScreen(int itemId) {

    //creating fragment object
    Fragment fragment = null;

    //initializing the fragment object which is selected
    switch (itemId) {
        case R.id.nav_home:
            fragment = new homeFragment();
            break;
        case R.id.nav_aboutSL:
            fragment = new aboutSLFragment();
            break;
        case R.id.nav_topLandmarks:
            fragment = new topLandmarksFragment();
            break;
        case R.id.nav_searchArea:
            fragment = new searchAreaFragment();
            break;
        case R.id.nav_searchCat:
            fragment = new searchCategoryFragment();
            break;
        case R.id.nav_events:
            fragment = new eventsFragment();
            break;
        case R.id.nav_transport:
            fragment = new transportFragment();
            break;
        case R.id.nav_commonPhrases:
            fragment = new commonPhrasesFragment();
            break;
        case R.id.nav_utilities:
            fragment = new utilitiesFragment();
            break;
    }

    //replacing the fragment
    if (fragment != null) {
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.content_frame, fragment);
        ft.commit();
    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    displaySelectedScreen(item.getItemId());
    return true;
}

}

Answer 1

如果要将工具栏包含在xml布局中，则必须将活动设置为无操作栏活动。为此，请遵循简单的步骤。

```
with_entities
```

粘贴此行

<activity                                                     
    android:name="yourActivity"
    android:theme="@style/ThemeNoActionBar" />

将coordinatorLayout添加到xml文件会显示两个工具栏？

1 个答案: