Android ViewStub
A ViewStub is a zero-sized imperceptible View which is
utilized to stack "design asset" at runtime. ViewStub is a zero
measurement View, so you won't see anything on the format pallete.
To make parent asset unmistakable, expand() technique is
summoned. To make ViewStub obvious or imperceptible, setVisibility(int)
strategy is summoned. The View.VISIBLE steady is utilized for making ViewStub
obvious and View.GONE consistent is utilized for imperceptible.
Example of ViewStub
How about we make a case of ViewStub View that presentations
and conceals an ImageView (picture) made in another design (my_layout.xml)
record.
Activity_main.xml
|
<?xml
version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
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.test.viewstubexample.MainActivity">
<ViewStub
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/viewStub"
android:layout_marginLeft="120dp"
android:layout="@layout/my_layout"
android:layout_alignParentTop="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Show"
android:id="@+id/show"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginLeft="65dp"
android:layout_marginStart="65dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hide"
android:id="@+id/hide"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/show"
android:layout_toEndOf="@+id/show"
android:layout_marginLeft="51dp"
android:layout_marginStart="51dp" />
</RelativeLayout>
|
My_layout.xml
|
<?xml version="1.0"
encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView"
android:background="@drawable/image"
/>
</LinearLayout>
|
File :- MainActivity.java
|
package com.example.android.viewstubexample;
import
android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewStub;
import android.widget.Button;
public class MainActivity extends
AppCompatActivity {
ViewStub viewStub;
Button show,hide;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
show=(Button)findViewById(R.id.show);
hide=(Button)findViewById(R.id.hide);
viewStub=(ViewStub)findViewById(R.id.viewStub);
viewStub.inflate();
show.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
viewStub.setVisibility(View.VISIBLE);
}
});
hide.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v)
{
viewStub.setVisibility(View.GONE);
}
});
}
}
|
OutPut :-
No comments:
Post a Comment