Improve Gallery Detail

app/src/main/java/com/hippo/drawable/UnikeryDrawable.java

@@ -0,0 +1,141 @@
+/*
+ * Copyright 2015 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.drawable;
+
+import android.graphics.drawable.Drawable;
+import android.support.annotation.NonNull;
+import android.widget.TextView;
+
+import com.hippo.conaco.Conaco;
+import com.hippo.conaco.Unikery;
+import com.hippo.conaco.ValueHolder;
+
+public class UnikeryDrawable extends WrapDrawable implements Unikery<ImageWrapper> {
+
+    private int mTaskId = Unikery.INVALID_ID;
+
+    private TextView mTextView;
+
+    private ValueHolder<ImageWrapper> mHolder;
+
+    public UnikeryDrawable(TextView textView) {
+        mTextView = textView;
+    }
+
+    @Override
+    public void setDrawable(Drawable drawable) {
+        // Remove old callback
+        Drawable oldDrawable = getDrawable();
+        if (oldDrawable != null) {
+            oldDrawable.setCallback(null);
+        }
+
+        super.setDrawable(drawable);
+
+        if (drawable != null) {
+            drawable.setCallback(mTextView);
+        }
+
+        updateBounds();
+        if (drawable != null) {
+            // mTextView.requestLayout() not work!
+            CharSequence cs = mTextView.getText();
+            mTextView.setText(cs);
+        }
+    }
+
+    @Override
+    public void setTaskId(int id) {
+        mTaskId = id;
+    }
+
+    @Override
+    public int getTaskId() {
+        return mTaskId;
+    }
+
+    @Override
+    public void onMiss(Conaco.Source source) {
+    }
+
+    @Override
+    public void onRequest() {
+    }
+
+    @Override
+    public void onProgress(long singleReceivedSize, long receivedSize, long totalSize) {
+    }
+
+    private void removeDrawableAndHolder() {
+        // Remove drawable
+        Drawable drawable = getDrawable();
+        if (drawable instanceof ImageDrawable) {
+            ((ImageDrawable) drawable).recycle();
+        }
+        setDrawable(null);
+
+        // Remove holder
+        if (mHolder != null) {
+            mHolder.release(this);
+
+            ImageWrapper imageWrapper = mHolder.getValue();
+            if (mHolder.isFree()) {
+                // ImageWrapper is free, stop animate
+                imageWrapper.stop();
+                if (!mHolder.isInMemoryCache()) {
+                    // ImageWrapper is not needed any more, recycle it
+                    imageWrapper.recycle();
+                }
+            }
+
+            mHolder = null;
+        }
+    }
+
+    @Override
+    public boolean onGetObject(@NonNull ValueHolder<ImageWrapper> holder, Conaco.Source source) {
+        holder.obtain(this);
+
+        removeDrawableAndHolder();
+
+        mHolder = holder;
+        ImageWrapper imageWrapper = holder.getValue();
+        Drawable drawable = new ImageDrawable(imageWrapper);
+        imageWrapper.start();
+
+        setDrawable(drawable);
+
+        return true;
+    }
+
+    @Override
+    public void onSetDrawable(Drawable drawable) {
+        removeDrawableAndHolder();
+
+        setDrawable(drawable);
+    }
+
+    @Override
+    public void onFailure() {
+        // Empty
+    }
+
+    @Override
+    public void onCancel() {
+        // Empty
+    }
+}