Friday, March 18, 2011

ViewFlipper

ViewFlipper is a simple ViewAnimator that will animate between two or more views that have been added to it. Only one child is shown at a time. If requested, can automatically flip between each child at a regular interval.

Here is a simple example to implement ViewFlipper.

ViewFlipper

Modify main.xml to have a ViewFlipper, with two LinearLayout inside.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<ViewFlipper
android:id="@+id/viewflipper"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="First Screen"/>
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Flip to second page"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Second Screen"/>
<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Flip back"/>
</LinearLayout>
</ViewFlipper>
</LinearLayout>


main code
package com.exercise.AndroidViewFlipper;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ViewFlipper;

public class AndroidViewFlipper extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final ViewFlipper MyViewFlipper = (ViewFlipper)findViewById(R.id.viewflipper);
Button button1 = (Button)findViewById(R.id.button1);
Button button2 = (Button)findViewById(R.id.button2);

button1.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
MyViewFlipper.showNext();
}});

button2.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
MyViewFlipper.showPrevious();
}});

}
}


Download the files.

next:
- Auto flipping of ViewFlipper
- ViewFlipper Animation

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