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Android example source code file (Transition3d.java)
This example Android source code file (Transition3d.java) is included in the DevDaily.com
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Warehouse" project. The intent of this project is to help you "Learn
Android by Example" TM.
The Transition3d.java Android example source code
package com.example.android.apis.animation;
import com.example.android.apis.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
/**
* This sample application shows how to use layout animation and various
* transformations on views. The result is a 3D transition between a
* ListView and an ImageView. When the user clicks the list, it flips to
* show the picture. When the user clicks the picture, it flips to show the
* list. The animation is made of two smaller animations: the first half
* rotates the list by 90 degrees on the Y axis and the second half rotates
* the picture by 90 degrees on the Y axis. When the first half finishes, the
* list is made invisible and the picture is set visible.
*/
public class Transition3d extends Activity implements
AdapterView.OnItemClickListener, View.OnClickListener {
private ListView mPhotosList;
private ViewGroup mContainer;
private ImageView mImageView;
// Names of the photos we show in the list
private static final String[] PHOTOS_NAMES = new String[] {
"Lyon",
"Livermore",
"Tahoe Pier",
"Lake Tahoe",
"Grand Canyon",
"Bodie"
};
// Resource identifiers for the photos we want to display
private static final int[] PHOTOS_RESOURCES = new int[] {
R.drawable.photo1,
R.drawable.photo2,
R.drawable.photo3,
R.drawable.photo4,
R.drawable.photo5,
R.drawable.photo6
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.animations_main_screen);
mPhotosList = (ListView) findViewById(android.R.id.list);
mImageView = (ImageView) findViewById(R.id.picture);
mContainer = (ViewGroup) findViewById(R.id.container);
// Prepare the ListView
final ArrayAdapter<String> adapter = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, PHOTOS_NAMES);
mPhotosList.setAdapter(adapter);
mPhotosList.setOnItemClickListener(this);
// Prepare the ImageView
mImageView.setClickable(true);
mImageView.setFocusable(true);
mImageView.setOnClickListener(this);
// Since we are caching large views, we want to keep their cache
// between each animation
mContainer.setPersistentDrawingCache(ViewGroup.PERSISTENT_ANIMATION_CACHE);
}
/**
* Setup a new 3D rotation on the container view.
*
* @param position the item that was clicked to show a picture, or -1 to show the list
* @param start the start angle at which the rotation must begin
* @param end the end angle of the rotation
*/
private void applyRotation(int position, float start, float end) {
// Find the center of the container
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;
// Create a new 3D rotation with the supplied parameter
// The animation listener is used to trigger the next animation
final Rotate3dAnimation rotation =
new Rotate3dAnimation(start, end, centerX, centerY, 310.0f, true);
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
rotation.setAnimationListener(new DisplayNextView(position));
mContainer.startAnimation(rotation);
}
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
// Pre-load the image then start the animation
mImageView.setImageResource(PHOTOS_RESOURCES[position]);
applyRotation(position, 0, 90);
}
public void onClick(View v) {
applyRotation(-1, 180, 90);
}
/**
* This class listens for the end of the first half of the animation.
* It then posts a new action that effectively swaps the views when the container
* is rotated 90 degrees and thus invisible.
*/
private final class DisplayNextView implements Animation.AnimationListener {
private final int mPosition;
private DisplayNextView(int position) {
mPosition = position;
}
public void onAnimationStart(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
mContainer.post(new SwapViews(mPosition));
}
public void onAnimationRepeat(Animation animation) {
}
}
/**
* This class is responsible for swapping the views and start the second
* half of the animation.
*/
private final class SwapViews implements Runnable {
private final int mPosition;
public SwapViews(int position) {
mPosition = position;
}
public void run() {
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;
Rotate3dAnimation rotation;
if (mPosition > -1) {
mPhotosList.setVisibility(View.GONE);
mImageView.setVisibility(View.VISIBLE);
mImageView.requestFocus();
rotation = new Rotate3dAnimation(90, 180, centerX, centerY, 310.0f, false);
} else {
mImageView.setVisibility(View.GONE);
mPhotosList.setVisibility(View.VISIBLE);
mPhotosList.requestFocus();
rotation = new Rotate3dAnimation(90, 0, centerX, centerY, 310.0f, false);
}
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new DecelerateInterpolator());
mContainer.startAnimation(rotation);
}
}
}
Other Android examples (source code examples)
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