Mix using of ImageDecoder and ObjectAnimator

Last posts show how to "Display animated GIF using ImageDecoder" and "Apply PostProcess for ImageDecoder". This example I try to mix using of ImageDecoder and ObjectAnimator, to apply animation on animated GIF.



Modify MainActivity.java

package com.blogspot.android_er.androidimagedecoder;

import android.animation.ObjectAnimator;
import android.animation.TimeInterpolator;
import android.app.Activity;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ImageDecoder;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.PostProcessor;
import android.graphics.drawable.AnimatedImageDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.IOException;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageView imageView1 = findViewById(R.id.gifimage1);
        ImageView imageView2 = findViewById(R.id.gifimage2);

        loadGif(imageView1);
        loadRoundGif(imageView2);

        imageView1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                prepareObjectAnimatorRotate((ImageView)v);
            }
        });

        imageView2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                prepareObjectAnimatorAlpha((ImageView)v);
            }
        });
    }

    PostProcessor myPostProcessor =
            new PostProcessor(){
                @Override
                public int onPostProcess(
                        Canvas canvas) {
                    // This will create rounded corners.
                    Path path = new Path();
                    path.setFillType(Path.FillType.INVERSE_EVEN_ODD);
                    int width = canvas.getWidth();
                    int height = canvas.getHeight();
                    path.addRoundRect(0, 0,
                            width, height, 150, 150,
                            Path.Direction.CW);
                    Paint paint = new Paint();
                    paint.setAntiAlias(true);
                    paint.setColor(Color.TRANSPARENT);
                    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
                    canvas.drawPath(path, paint);
                    return PixelFormat.TRANSLUCENT;
                }
            };


    ImageDecoder.OnHeaderDecodedListener myOnHeaderDecodedListener =
            new ImageDecoder.OnHeaderDecodedListener(){
                @Override
                public void onHeaderDecoded
                        (ImageDecoder decoder,
                         ImageDecoder.ImageInfo info,
                         ImageDecoder.Source source) {
                    decoder.setPostProcessor(myPostProcessor);
                }
            };

    private void loadGif(ImageView iv){

        try {
            ImageDecoder.Source source =
                    ImageDecoder.createSource(getResources(), R.drawable.android_er);

            Drawable drawable = ImageDecoder.decodeDrawable(source);

            iv.setImageDrawable(drawable);

            if (drawable instanceof AnimatedImageDrawable) {
                ((AnimatedImageDrawable) drawable).start();
                Toast.makeText(getApplicationContext(),
                        "loadGif: Animation started",
                        Toast.LENGTH_LONG).show();
            }

        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(),
                    "loadGif: IOException: \n" + e.getMessage(),
                    Toast.LENGTH_LONG).show();
        }

    }

    private void loadRoundGif(ImageView iv){

        try {
            ImageDecoder.Source source =
                    ImageDecoder.createSource(getResources(), R.drawable.android_er);

            //Drawable drawable = ImageDecoder.decodeDrawable(source);
            Drawable drawable = ImageDecoder.decodeDrawable(source,
                    myOnHeaderDecodedListener);

            iv.setImageDrawable(drawable);

            if (drawable instanceof AnimatedImageDrawable) {
                ((AnimatedImageDrawable) drawable).start();
                Toast.makeText(getApplicationContext(),
                        "loadRoundGif: Animation started",
                        Toast.LENGTH_LONG).show();
            }

        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(),
                    "loadRoundGif: IOException: \n" + e.getMessage(),
                    Toast.LENGTH_LONG).show();
        }

    }

    private void prepareObjectAnimatorRotate(ImageView image){
        TimeInterpolator timeInterpolator =
                new AccelerateDecelerateInterpolator();
        float propertyStart = 0f;
        float propertyEnd = 360f;
        String propertyName = "rotation";
        ObjectAnimator objectAnimator
                = ObjectAnimator.ofFloat(
                        image, propertyName, propertyStart, propertyEnd);
        objectAnimator.setDuration(5000);
        objectAnimator.setRepeatCount(1);
        objectAnimator.setRepeatMode(ObjectAnimator.REVERSE);
        objectAnimator.setInterpolator(timeInterpolator);
        objectAnimator.start();
    }

    private void prepareObjectAnimatorAlpha(ImageView image){
        TimeInterpolator timeInterpolator =
                new AccelerateDecelerateInterpolator();
        float propertyStart = 1f;
        float propertyEnd = 0f;
        String propertyName = "alpha";
        ObjectAnimator objectAnimator
                = ObjectAnimator.ofFloat(
                        image, propertyName, propertyStart, propertyEnd);
        objectAnimator.setDuration(5000);
        objectAnimator.setRepeatCount(1);
        objectAnimator.setRepeatMode(ObjectAnimator.REVERSE);
        objectAnimator.setInterpolator(timeInterpolator);
        objectAnimator.start();
    }
}

Keep using the layout in last post "Apply PostProcess for ImageDecoder".

If you target to animated GIF and it cannot shown, try to disable hardwareAccelerated, refer to "Display animated GIF using ImageDecoder".

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Related old post:
- Interpolator effect on ObjectAnimator