package com.fanxin.huangfangyi.video.util; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.drawable.BitmapDrawable; import android.util.Log; import com.fanxin.huangfangyi.BuildConfig; public class RecyclingBitmapDrawable extends BitmapDrawable { static final String TAG = "CountingBitmapDrawable"; private int mCacheRefCount = 0; private int mDisplayRefCount = 0; private boolean mHasBeenDisplayed; public RecyclingBitmapDrawable(Resources res, Bitmap bitmap) { super(res, bitmap); } /** * Notify the drawable that the displayed state has changed. Internally a * count is kept so that the drawable knows when it is no longer being * displayed. * * @param isDisplayed * - Whether the drawable is being displayed or not */ public void setIsDisplayed(boolean isDisplayed) { // BEGIN_INCLUDE(set_is_displayed) synchronized (this) { if (isDisplayed) { mDisplayRefCount++; mHasBeenDisplayed = true; } else { mDisplayRefCount--; } } // Check to see if recycle() can be called checkState(); // END_INCLUDE(set_is_displayed) } /** * Notify the drawable that the cache state has changed. Internally a count * is kept so that the drawable knows when it is no longer being cached. * * @param isCached * - Whether the drawable is being cached or not */ public void setIsCached(boolean isCached) { // BEGIN_INCLUDE(set_is_cached) synchronized (this) { if (isCached) { mCacheRefCount++; } else { mCacheRefCount--; } } // Check to see if recycle() can be called checkState(); // END_INCLUDE(set_is_cached) } private synchronized void checkState() { // BEGIN_INCLUDE(check_state) // If the drawable cache and display ref counts = 0, and this drawable // has been displayed, then recycle if (mCacheRefCount <= 0 && mDisplayRefCount <= 0 && mHasBeenDisplayed && hasValidBitmap()) { if (BuildConfig.DEBUG) { Log.d(TAG, "No longer being used or cached so recycling. " + toString()); } getBitmap().recycle(); } // END_INCLUDE(check_state) } private synchronized boolean hasValidBitmap() { Bitmap bitmap = getBitmap(); return bitmap != null && !bitmap.isRecycled(); } }