Android

ViewPager PagerAdapter not updating the View

There are several ways to achieve this. The first option is easier, but bit more inefficient. Override getItemPosition in your PagerAdapter like this:

public int getItemPosition(Object object) {
    return POSITION_NONE;
}

public int getItemPosition(Object object) {

return POSITION_NONE;

}

This way, when you call notifyDataSetChanged(), the view pager will remove all views and reload them all. As so the reload effect is obtained. The second option, suggested by Alvaro Luis Bustamante (previously alvarolb), is to setTag()method in instantiateItem() when […]

shubham sharma July 20, 2018 Read More

Moving and resizing DrawerLayout’s content on sliding

You can do this by translating and scaling the content View in the onDrawerSlide() method of a DrawerListener on your DrawerLayout. Since the content View itself is resizing, and there’s a separate TextView that appears in the bottom right corner, we’ll stick both of these in another holder ViewGroup. If that label TextView isn’t needed, the holder ViewGroup can be omitted, as well. A basic DrawerLayout setup for the example:

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#222222">

    <RelativeLayout android:id="@+id/holder"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout android:id="@+id/content"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="#E97411" />

            <ImageView android:id="@+id/main_content"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_weight="1"
                android:background="#EEEEEE"
                android:src="@drawable/ic_launcher" />

        </LinearLayout>

        <TextView android:id="@+id/label"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:visibility="gone"
            android:textSize="26dp"
            android:text="My App" />

    </RelativeLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/navigation_view"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="left"
        android:background="#555555" />

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

<android.support.v4.widget.DrawerLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/drawer_layout"