我是Android的新手,我正在尝试在选择的标签上显示单独的总背景但是我这样做的总背景与我需要的时候我更换另一个标签我需要每个标签的单独图像请在下面帮助我我的代码和每个标签需要这个图像
XML布局:
<LinearLayout
android:id="@+id/main_layout"
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"
tools:context=".MainActivity"
android:orientation="vertical"
android:background="@drawable/imag_bg" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="AppName"
android:id="@+id/textView"
android:textColor="#FFFFFF"
android:textStyle="bold"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="150dp"
android:textSize="55dp"
android:layout_gravity="center_horizontal" />
<android.support.design.widget.TabLayout
android:id="@+id/tab_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:layout_marginTop="25dp"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_below="@id/tab_layout"/>
</LinearLayout>
答案 0 :(得分:2)
您可以使用ViewPager.onPageChangeListener
并相应地更改main_layout背景。
LinearLayout mMainLayout = findViewById(R.id.main_layout);//get the main_layout reference
ViewPager viewPager = findViewById(R.id.pager);//get the ViewPager reference
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
public void onPageSelected(int position) {
//set the background according each tab/page
if(position == 0){
mMainLayout.setBackgroundResource(R.drawable.imag_bg);
}else{
mMainLayout.setBackgroundResource(R.drawable.image_2);//change to your alternative image
}
}
});