If you make the container for the red area a layout such as LinearLayout
or RelativeLayout
fill the screen, then you can make it clickable through XML or programmatically and capture clicks there. Here is a quick example of how to do this.
This assumes that you just want to dismiss if the white area is clicked.
Update: Here is a quick example. This little app will set the white area red if it is clicked. In the click listener, you can easily do what you need to to dismiss the red area.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<!--Set onClick and clickable here to capture clicks. -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/backgroundLayout"
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:background="@android:color/white"
android:clickable="true"
android:onClick="layoutClicked"
tools:context="com.example.layout2.MainActivity">
<!--Set clickable here, too, to capture clicks so they don't propagate
to underlying view. The button is still enabled, though. -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="200dp"
android:background="@android:color/holo_blue_bright"
android:clickable="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</LinearLayout>
</LinearLayout>
And the supporting code:
MainActivity.java
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void layoutClicked(View view) {
// Set the background color of the "outside" area to red.
// This is where you would dismiss the red area.
view.setBackgroundColor(0xFFDD0000);
}
}
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