Random Layout Animation

Random Layout Animation

This example shows how you can animate contents of a layout and show them randomly.

Algorithm:

1.) Create a new project by File-> New -> Android Project name it RandomLayoutAnimation.

2.) Create an anim folder into res directory and create and write following into res/anim/fade.xml:

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
      android:interpolator="@android:anim/accelerate_interpolator"
      android:fromAlpha="0.0" android:toAlpha="1.0"
      android:duration="@android:integer/config_longAnimTime" />

3.) Create and write following into res/anim/ layout_random_fade.xml:

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
       android:delay="0.5"
       android:animationOrder="random"
       android:animation="@anim/fade" />

4.) Write following into your main.xml:

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/grid"
   android:layoutAnimation="@anim/layout_random_fade"

   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   android:padding="10dp"
   android:verticalSpacing="10dp"

   android:horizontalSpacing="10dp"
   android:numColumns="auto_fit"
   android:columnWidth="60dp"
   android:stretchMode="columnWidth"

   android:gravity="center" />

5.) Run for output.

Steps:
1.) Create a project named RandomLayoutAnimation and set the information as stated in the image.

Build Target: Android 2.3.3
Application Name: RandomLayoutAnimation
Package Name: com.example. RandomLayoutAnimation
Activity Name: RandomLayoutAnimation
Min SDK Version: 10

2.) Open RandomLayoutAnimation.java file and write following code there:

package com.example.RandomLayoutAnimation;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class RandomLayoutAnimation extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        loadApps();

        setContentView(R.layout.main);
        GridView grid = (GridView) findViewById(R.id.grid);
        grid.setAdapter(new AppsAdapter());

    }

    private List<ResolveInfo> mApps;

    private void loadApps() {
        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);

        mApps = getPackageManager().queryIntentActivities(mainIntent, 0);
    }

    public class AppsAdapter extends BaseAdapter {
        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView i = new ImageView(RandomLayoutAnimation.this);

            ResolveInfo info = mApps.get(position % mApps.size());

            i.setImageDrawable(info.activityInfo.loadIcon(getPackageManager()));
            i.setScaleType(ImageView.ScaleType.FIT_CENTER);
            final int w = (int) (36 * getResources().getDisplayMetrics().density+ 0.5f);
            i.setLayoutParams(new GridView.LayoutParams(w, w));
            return i;
        }

        public final int getCount() {
            return Math.min(32, mApps.size());
        }

        public final Object getItem(int position) {
            return mApps.get(position % mApps.size());
        }

        public final long getItemId(int position) {
            return position;
        }
    }
}

3.) Compile and build the project.

Output