Добавлен ImageView с поддержкой анимации переходов

src/com/annimon/everlastingsummer/AnimatableImageView.java

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+package com.annimon.everlastingsummer;
+
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.TransitionDrawable;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+
+/**
+ * ImageView с поддержкой анимации переходов.
+ * @author aNNiMON
+ */
+public class AnimatableImageView extends ImageView {
+    
+    private static final Drawable BLACK_DRAWABLE = new ColorDrawable(0xFF000000);
+    private static final Drawable WHITE_DRAWABLE = new ColorDrawable(0xFFFFFFFF);
+    private static final Drawable RED_DRAWABLE = new ColorDrawable(0xFFFF0000);
+    
+    private static final Anim FADE = new Anim(1000, BLACK_DRAWABLE);
+    private static final Anim FADE2 = new Anim(2000, BLACK_DRAWABLE);
+    private static final Anim FADE3 = new Anim(3000, BLACK_DRAWABLE);
+    private static final Anim DSPR = new Anim(200);
+    private static final Anim DISSOLVE = new Anim(1000);
+    private static final Anim DISSOLVE2 = new Anim(2000);
+    private static final Anim FLASH = new Anim(1000, WHITE_DRAWABLE);
+    private static final Anim FLASH2 = new Anim(2000, WHITE_DRAWABLE);
+    private static final Anim FLASH_RED = new Anim(1000, RED_DRAWABLE);
+    
+    private static final Map<String, Anim> animations;
+    static {
+        animations = new HashMap<String, AnimatableImageView.Anim>();
+        animations.put("fade", FADE);
+        animations.put("fade2", FADE2);
+        animations.put("fade3", FADE3);
+        animations.put("dspr", DSPR);
+        animations.put("dissolve", DISSOLVE);
+        animations.put("dissolve2", DISSOLVE2);
+        animations.put("flash", FLASH);
+        animations.put("flash2", FLASH2);
+        animations.put("flash_red", FLASH_RED);
+    }
+    
+    private Drawable previous;
+    
+    public AnimatableImageView(Context context) {
+        super(context);
+    }
+    
+    public AnimatableImageView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+    
+    public AnimatableImageView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    public void setImageResource(int resId) {
+        setImageResource(resId, "");
+    }
+    
+    public void setImageResource(int resId, String effect) {
+        previous = getDrawable();
+        super.setImageResource(resId);
+        setAnimationEffect(effect);
+    }
+
+    @Override
+    public void setImageDrawable(Drawable drawable) {
+        setImageDrawable(drawable, "");
+    }
+    
+    public void setImageDrawable(Drawable drawable, String effect) {
+        previous = getDrawable();
+        super.setImageDrawable(drawable);
+        setAnimationEffect("");
+    }
+
+    @Override
+    public void setImageBitmap(Bitmap bm) {
+        setImageBitmap(bm, "");
+    }
+    
+    public void setImageBitmap(Bitmap bm, String effect) {
+        previous = getDrawable();
+        super.setImageBitmap(bm);
+        setAnimationEffect(effect);
+    }
+    
+    private void setAnimationEffect(String animEffect) {
+        final String effect = animEffect.toLowerCase(Locale.ENGLISH);
+        if (!animations.containsKey(effect)) return;
+        
+        final Anim anim = animations.get(effect);
+        
+        final Drawable[] layers = new Drawable[2];
+        layers[0] = anim.usePreviousDrawable ? previous : anim.drawable;
+        layers[1] = getDrawable();
+        
+        final TransitionDrawable transition = new TransitionDrawable(layers);
+        setImageDrawable(transition);
+        transition.startTransition(anim.duration);
+    }
+
+    private static class Anim {
+        final int duration;
+        final boolean usePreviousDrawable;
+        final Drawable drawable;
+        
+        Anim(int duration) {
+            this(duration, true, null);
+        }
+        
+        Anim(int duration, Drawable drawable) {
+            this(duration, false, drawable);
+        }
+
+        Anim(int duration, boolean usePreviousDrawable, Drawable drawable) {
+            this.duration = duration;
+            this.usePreviousDrawable = usePreviousDrawable;
+            this.drawable = drawable;
+        }
+    }
+}