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>
The example Activity
shows the standard View
initializations, and the DrawerListener
that is actually doing the work.
public class MainActivity extends AppCompatActivity {
private static final float END_SCALE = 0.7f;
private DrawerLayout drawerLayout;
private NavigationView navigationView;
private Toolbar toolbar;
private TextView labelView;
private View contentView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
navigationView = (NavigationView) findViewById(R.id.navigation_view);
toolbar = (Toolbar) findViewById(R.id.toolbar);
labelView = (TextView) findViewById(R.id.label);
contentView = findViewById(R.id.content);
toolbar.setNavigationIcon(new DrawerArrowDrawable(this));
toolbar.setNavigationOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (drawerLayout.isDrawerOpen(navigationView)) {
drawerLayout.closeDrawer(navigationView);
}
else {
drawerLayout.openDrawer(navigationView);
}
}
}
);
drawerLayout.setScrimColor(Color.TRANSPARENT);
drawerLayout.addDrawerListener(new DrawerLayout.SimpleDrawerListener() {
@Override
public void onDrawerSlide(View drawerView, float slideOffset) {
labelView.setVisibility(slideOffset > 0 ? View.VISIBLE : View.GONE);
// Scale the View based on current slide offset
final float diffScaledOffset = slideOffset * (1 - END_SCALE);
final float offsetScale = 1 - diffScaledOffset;
contentView.setScaleX(offsetScale);
contentView.setScaleY(offsetScale);
// Translate the View, accounting for the scaled width
final float xOffset = drawerView.getWidth() * slideOffset;
final float xOffsetDiff = contentView.getWidth() * diffScaledOffset / 2;
final float xTranslation = xOffset - xOffsetDiff;
contentView.setTranslationX(xTranslation);
}
@Override
public void onDrawerClosed(View drawerView) {
labelView.setVisibility(View.GONE);
}
}
);
}
}
The example uses a SimpleDrawerListener
, but the onDrawerSlide()
method can be overridden similarly in an ActionBarDrawerToggle
, if using that. The super
method would need to be called, in that case, to preserve the hamburger-arrow animation.
Do note that DrawerLayout
retains the drawer state during Activity
recreation, so you might need to account for this when handing orientation changes, etc.
Drawer behavior is a library use Android DrawerLayout Support library as Parent Class [Easy to migrate], that provide an extra behavior on drawer, such as, move view or scaling view's height while drawer on slide.
If current project use Android DrawerLayout Support library and kinda boring with the effect. Then, just change the layout code and calling necessary method for animation/effect.
Check out github code
Gradle
dependencies {
implementation 'com.infideap.drawerbehavior:drawer-behavior:0.1.5'
}
if the gradle unable to sync, you may include this line in project level gradle,
repositories {
maven{
url "https://dl.bintray.com/infideap2/Drawer-Behavior"
}
}