Thursday, February 9, 2012

Create book-like view switching, ViewFlipper




Create the animation effect XML files
/res/anim/flipin.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/overshoot_interpolator">
<translate
android:fromXDelta="100%p"
android:toXDelta="0"
android:duration="500"/>
</set>


/res/anim/flipout.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/overshoot_interpolator">
<translate
android:fromXDelta="0"
android:toXDelta="-100%p"
android:duration="500"/>
</set>


main.xml
Each View (LinearLayout in this case) inside <ViewFlipper> is a page.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
<Button
android:id="@+id/next"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="next"/>

<ViewFlipper
android:id="@+id/flipper"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:inAnimation="@anim/flipin"
android:outAnimation="@anim/flipout">

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<ImageView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:src="@drawable/ic_launcher"/>
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center"
android:background="#C0C0C0">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/ic_launcher"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/ic_launcher"/>
</LinearLayout>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal"
android:gravity="center"
android:background="#A0A0A0">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/ic_launcher"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:src="@drawable/ic_launcher"/>
</LinearLayout>

</ViewFlipper>
</LinearLayout>


Main activity:
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 AndroidViewFlipperActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

final ViewFlipper page = (ViewFlipper)findViewById(R.id.flipper);
Button btnNext = (Button)findViewById(R.id.next);

btnNext.setOnClickListener(new Button.OnClickListener(){

@Override
public void onClick(View arg0) {
page.showNext();

}});
}
}


Download the files.

Next:
- Bi-direction ViewFlipper

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