I'm getting the following error:
Error: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference.
I'm trying to create a tabbed bar with fragments.
MainActivity.xml
TabAdapter = new TabPagerAdapter(getSupportFragmentManager());
tab = (ViewPager)findViewById(R.id.pager);
tab.setOnPageChangeListener(
new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar = getSupportActionBar();
actionBar.setSelectedNavigationItem(position);
}
});
tab.setAdapter(TabAdapter);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
ActionBar.TabListener tabListener = new ActionBar.TabListener() {
@Override
public void onTabUnselected(ActionBar.Tab tab2, FragmentTransaction ft) {
}
@Override
public void onTabSelected(ActionBar.Tab tab2, FragmentTransaction ft) {
tab.setCurrentItem(tab2.getPosition());
}
@Override
public void onTabReselected(ActionBar.Tab tab2, FragmentTransaction ft) {
}
};
actionBar.addTab(actionBar.newTab().setText("Credit card").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("Net banking").setTabListener(tabListener));
actionBar.addTab(actionBar.newTab().setText("Debit Card").setTabListener(tabListener));
Styles.xml
</style>
<style name="MyMaterialTheme.Base" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="android:textColorPrimary">@color/screen_background</item>
<item name="android:windowBackground">@color/windowBackground</item>
</style>
<style name="menu_labels_style">
<item name="android:background">@drawable/fab_label_background</item>
<item name="android:textColor">@color/white</item>
</style>
<style name="CustomTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="android:textColorPrimary">@color/list_view_blue</item>
<item name="android:textColorSecondary">@color/list_view_blue</item>
</style>
activity_main.xml
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="in.omniware.tracknpay_material.activity.Payment">
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.omniware3.MenuPage" />
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
android:id="@+id/container_toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<include
android:id="@+id/toolbar"
layout="@layout/toolbar" />
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
Toolbar.xml
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Toolbar Title"
android:id="@+id/toolbar_title"
android:textColor="#010101" />
<!--android:layout_gravity="center"-->
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/walletAmount"
android:textColor="#010101"
android:layout_alignParentRight="true"
android:layout_gravity="right"
android:paddingRight="5dip"
/>
</android.support.v7.widget.Toolbar>
这是答案NoActionBar
<style name="MyMaterialTheme.Base" parent="Theme.AppCompat.NoActionBar">
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