Java Code Examples for android.util.LruCache#get()

public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
    final String key = "attachment_" + attachment.getUuid().toString() + "_" + String.valueOf(size);
    final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
    Bitmap bitmap = cache.get(key);
    if (bitmap != null || cacheOnly) {
        return bitmap;
    }
    DownloadableFile file = new DownloadableFile(attachment.getUri().getPath());
    if ("application/pdf".equals(attachment.getMime()) && Compatibility.runsTwentyOne()) {
        bitmap = cropCenterSquare(getPDFPreview(file, size), size);
    } else if (attachment.getMime() != null && attachment.getMime().startsWith("video/")) {
        bitmap = cropCenterSquareVideo(attachment.getUri(), size);
        drawOverlay(bitmap, R.drawable.play_video, 0.75f);
    } else {
        bitmap = cropCenterSquare(attachment.getUri(), size);
        if (bitmap != null && "image/gif".equals(attachment.getMime())) {
            Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
            drawOverlay(withGifOverlay, R.drawable.play_gif, 1.0f);
            bitmap.recycle();
            bitmap = withGifOverlay;
        }
    }
    if (bitmap != null) {
        cache.put(key, bitmap);
    }
    return bitmap;
}
 

public Bitmap getPreviewForUri(Attachment attachment, int size, boolean cacheOnly) {
    final String key = "attachment_" + attachment.getUuid().toString() + "_" + size;
    final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
    Bitmap bitmap = cache.get(key);
    if (bitmap != null || cacheOnly) {
        return bitmap;
    }
    final String mime = attachment.getMime();
    if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
        bitmap = cropCenterSquarePdf(attachment.getUri(), size);
        drawOverlay(bitmap, paintOverlayBlackPdf(bitmap) ? R.drawable.open_pdf_black : R.drawable.open_pdf_white, 0.75f);
    } else if (mime != null && mime.startsWith("video/")) {
        bitmap = cropCenterSquareVideo(attachment.getUri(), size);
        drawOverlay(bitmap, paintOverlayBlack(bitmap) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
    } else {
        bitmap = cropCenterSquare(attachment.getUri(), size);
        if (bitmap != null && "image/gif".equals(mime)) {
            Bitmap withGifOverlay = bitmap.copy(Bitmap.Config.ARGB_8888, true);
            drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
            bitmap.recycle();
            bitmap = withGifOverlay;
        }
    }
    if (bitmap != null) {
        cache.put(key, bitmap);
    }
    return bitmap;
}
 

public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
    final String uuid = message.getUuid();
    final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
    Bitmap thumbnail = cache.get(uuid);
    if ((thumbnail == null) && (!cacheOnly)) {
        synchronized (THUMBNAIL_LOCK) {
            thumbnail = cache.get(uuid);
            if (thumbnail != null) {
                return thumbnail;
            }
            DownloadableFile file = getFile(message);
            final String mime = file.getMimeType();
            if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
                thumbnail = getPdfDocumentPreview(file, size);
            } else if (mime.startsWith("video/")) {
                thumbnail = getVideoPreview(file, size);
            } else {
                Bitmap fullsize = getFullSizeImagePreview(file, size);
                if (fullsize == null) {
                    throw new FileNotFoundException();
                }
                thumbnail = resize(fullsize, size);
                thumbnail = rotate(thumbnail, getRotation(file));
                if (mime.equals("image/gif")) {
                    Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
                    drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
                    thumbnail.recycle();
                    thumbnail = withGifOverlay;
                }
            }
            cache.put(uuid, thumbnail);
        }
    }
    return thumbnail;
}
 

/**
 * 对RecyclerView进行截图
 * https://gist.github.com/PrashamTrivedi/809d2541776c8c141d9a
 */
public static Bitmap shotRecyclerView(RecyclerView view) {
    RecyclerView.Adapter adapter = view.getAdapter();
    Bitmap bigBitmap = null;
    if (adapter != null) {
        int size = adapter.getItemCount();
        int height = 0;
        Paint paint = new Paint();
        int iHeight = 0;
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);

        // Use 1/8th of the available memory for this memory cache.
        final int cacheSize = maxMemory / 8;
        LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize);
        for (int i = 0; i < size; i++) {
            RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i));
            adapter.onBindViewHolder(holder, i);
            holder.itemView.measure(
                    View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                    View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
            holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(),
                    holder.itemView.getMeasuredHeight());
            holder.itemView.setDrawingCacheEnabled(true);
            holder.itemView.buildDrawingCache();
            Bitmap drawingCache = holder.itemView.getDrawingCache();
            if (drawingCache != null) {

                bitmaCache.put(String.valueOf(i), drawingCache);
            }
            height += holder.itemView.getMeasuredHeight();
        }

        bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Bitmap.Config.ARGB_8888);
        Canvas bigCanvas = new Canvas(bigBitmap);
        Drawable lBackground = view.getBackground();
        if (lBackground instanceof ColorDrawable) {
            ColorDrawable lColorDrawable = (ColorDrawable) lBackground;
            int lColor = lColorDrawable.getColor();
            bigCanvas.drawColor(lColor);
        }

        for (int i = 0; i < size; i++) {
            Bitmap bitmap = bitmaCache.get(String.valueOf(i));
            bigCanvas.drawBitmap(bitmap, 0f, iHeight, paint);
            iHeight += bitmap.getHeight();
            bitmap.recycle();
        }
    }
    return bigBitmap;
}
 

public static Bitmap shotRecyclerView(RecyclerView view) {
    RecyclerView.Adapter adapter = view.getAdapter();
    Bitmap bigBitmap = null;
    if (adapter != null) {
        int size = adapter.getItemCount();
        int height = 0;
        Paint paint = new Paint();
        int iHeight = 0;
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);

        // Use 1/8th of the available memory for this memory cache.
        final int cacheSize = maxMemory / 8;
        LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize);
        for (int i = 0; i < size; i++) {
            RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i));
            adapter.onBindViewHolder(holder, i);
            holder.itemView.measure(
                    View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                    View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
            holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(),
                    holder.itemView.getMeasuredHeight());
            holder.itemView.setDrawingCacheEnabled(true);
            holder.itemView.buildDrawingCache();
            Bitmap drawingCache = holder.itemView.getDrawingCache();
            if (drawingCache != null) {
                bitmaCache.put(String.valueOf(i), drawingCache);
            }
            height += holder.itemView.getMeasuredHeight();
        }

        bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Config.ARGB_8888);
        Canvas bigCanvas = new Canvas(bigBitmap);
        Drawable lBackground = view.getBackground();
        if (lBackground instanceof ColorDrawable) {
            ColorDrawable lColorDrawable = (ColorDrawable) lBackground;
            int lColor = lColorDrawable.getColor();
            bigCanvas.drawColor(lColor);
        }

        for (int i = 0; i < size; i++) {
            Bitmap bitmap = bitmaCache.get(String.valueOf(i));
            bigCanvas.drawBitmap(bitmap, 0f, iHeight, paint);
            iHeight += bitmap.getHeight();
            bitmap.recycle();
        }
    }

    return bigBitmap;
}
 

public static Bitmap shotRecyclerView(RecyclerView view, int itemHeight) {
    RecyclerView.Adapter adapter = view.getAdapter();
    Bitmap bigBitmap = null;
    if (adapter != null) {
        int size = adapter.getItemCount();
        int height = 0;
        Paint paint = new Paint();
        int iHeight = 0;
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);

        // Use 1/8th of the available memory for this memory cache.
        final int cacheSize = maxMemory / 8;
        LruCache<String, Bitmap> bitmaCache = new LruCache<>(cacheSize);
        for (int i = 0; i < size; i++) {
            RecyclerView.ViewHolder holder = adapter.createViewHolder(view, adapter.getItemViewType(i));
            adapter.onBindViewHolder(holder, i);
            holder.itemView.measure(
                    View.MeasureSpec.makeMeasureSpec(view.getWidth(), View.MeasureSpec.EXACTLY),
                    View.MeasureSpec.makeMeasureSpec(itemHeight, View.MeasureSpec.EXACTLY));
            holder.itemView.layout(0, 0, holder.itemView.getMeasuredWidth(),
                    holder.itemView.getMeasuredHeight());
            holder.itemView.setDrawingCacheEnabled(true);
            holder.itemView.buildDrawingCache();
            Bitmap drawingCache = holder.itemView.getDrawingCache();
            if (drawingCache != null) {
                bitmaCache.put(String.valueOf(i), drawingCache);
            }
            height += holder.itemView.getMeasuredHeight();
        }

        bigBitmap = Bitmap.createBitmap(view.getMeasuredWidth(), height, Config.ARGB_8888);
        Canvas bigCanvas = new Canvas(bigBitmap);
        Drawable lBackground = view.getBackground();
        if (lBackground instanceof ColorDrawable) {
            ColorDrawable lColorDrawable = (ColorDrawable) lBackground;
            int lColor = lColorDrawable.getColor();
            bigCanvas.drawColor(lColor);
        }

        for (int i = 0; i < size; i++) {
            Bitmap bitmap = bitmaCache.get(String.valueOf(i));
            bigCanvas.drawBitmap(bitmap, 0f, iHeight, paint);
            iHeight += bitmap.getHeight();
            bitmap.recycle();
        }
    }

    return bigBitmap;
}
 

public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
    // The key for getting a cached thumbnail contains the UUID and the size
    // since this method is used for thumbnails of (bigger) normal image messages and (smaller) image message references.
    // If only the UUID were used, the first loaded thumbnail would be cached and the next loading
    // would get that thumbnail which would have the size of the first cached thumbnail
    // possibly leading to undesirable appearance of the displayed thumbnail.
    final String key = message.getUuid() + String.valueOf(size);
    final String uuid = message.getUuid();
    final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
    Bitmap thumbnail = cache.get(key);
    if ((thumbnail == null) && (!cacheOnly)) {
        synchronized (THUMBNAIL_LOCK) {
            thumbnail = cache.get(key);
            if (thumbnail != null) {
                return thumbnail;
            }
            DownloadableFile file = getFile(message);
            final String mime = file.getMimeType();
            if ("application/pdf".equals(mime) && Compatibility.runsTwentyOne()) {
                thumbnail = getPDFPreview(file, size);
            } else if (mime.startsWith("video/")) {
                thumbnail = getVideoPreview(file, size);
            } else if (mime.startsWith("image/")) {
                Bitmap fullsize = getFullsizeImagePreview(file, size);
                if (fullsize == null) {
                    throw new FileNotFoundException();
                }
                thumbnail = resize(fullsize, size);
                thumbnail = rotate(thumbnail, getRotation(file));
                if (mime.equals("image/gif")) {
                    Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
                    drawOverlay(withGifOverlay, R.drawable.play_gif, 1.0f);
                    thumbnail.recycle();
                    thumbnail = withGifOverlay;
                }
            }
            cache.put(key, thumbnail);
        }
    }
    return thumbnail;
}