Bitmap copyPixelsToBuffer - top ranked examples from Open Source projects

These code examples were ranked by Codota’s semantic indexing as the best open source examples for Bitmap copyPixelsToBuffer method.

This code example shows how to use the following methods:copyPixelsToBuffer, getHeight, getRowBytes, getWidth
        } 
        return bmp;
    } 
     
    private static void compareImages(Bitmap bmp1, Bitmap bmp2) {
        assertTrue(bmp1.getHeight() == bmp2.getHeight());
        assertTrue(bmp1.getWidth() == bmp1.getWidth());
        ByteBuffer buffer1 = ByteBuffer.allocate(bmp1.getHeight() * bmp1.getRowBytes());
        bmp1.copyPixelsToBuffer(buffer1);
 
        ByteBuffer buffer2 = ByteBuffer.allocate(bmp2.getHeight() * bmp2.getRowBytes());
        bmp2.copyPixelsToBuffer(buffer2);
 
        assertTrue(Arrays.equals(buffer1.array(), buffer2.array()));
    } 
 
    private Context safeGetContext() {
        for (;;) { 
            if ((getContext() != null) && (getContext().getApplicationContext() != null)) {
                return getContext();
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This code example shows how to use the following methods:copyPixelsFromBuffer, copyPixelsToBuffer, getConfig, getHeight, getRowBytes
			// android:name="android.permission.WRITE_EXTERNAL_STORAGE" 
			// into AndroidManifest.xml file 
			RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw");
 
			// get the width and height of the source bitmap. 
			int width = imgIn.getWidth();
			int height = imgIn.getHeight();
			Config type = imgIn.getConfig();
 
			// Copy the byte to the file 
			// Assume source bitmap loaded using options.inPreferredConfig = 
			// Config.ARGB_8888; 
			FileChannel channel = randomAccessFile.getChannel();
			MappedByteBuffer map = channel.map(MapMode.READ_WRITE, 0,
					imgIn.getRowBytes() * height);
			imgIn.copyPixelsToBuffer(map);
			// recycle the source bitmap, this will be no longer used. 
			imgIn.recycle();
			System.gc();// try to force the bytes from the imgIn to be released
 

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This code example shows how to use the following methods:copyPixelsToBuffer, getHeight, getWidth
    	nativeInitBitmapDC(bitmap.getWidth(), bitmap.getHeight(), pixels);
    } 
     
    private static byte[] getPixels(Bitmap bitmap){
    	if (bitmap != null){
    		byte[] pixels = new byte[bitmap.getWidth() * bitmap.getHeight() * 4];
    		ByteBuffer buf = ByteBuffer.wrap(pixels);
    		buf.order(ByteOrder.nativeOrder());
    		bitmap.copyPixelsToBuffer(buf);
    		return pixels;
    	} 
    	 
    	return null; 
    } 
     
    private static native void nativeInitBitmapDC(int width, int height, byte[] pixels);
} 
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This code example shows how to use the following methods:copyPixelsToBuffer, getHeight, getRowBytes
            // Do nothing 
        } 
    } 
 
    protected boolean sameBitmap(Bitmap bitmap1, Bitmap bitmap2) {
        ByteBuffer buffer1 = ByteBuffer.allocate(bitmap1.getHeight() * bitmap1.getRowBytes());
        bitmap1.copyPixelsToBuffer(buffer1);
 
        ByteBuffer buffer2 = ByteBuffer.allocate(bitmap2.getHeight() * bitmap2.getRowBytes());
        bitmap2.copyPixelsToBuffer(buffer2);
 
        return Arrays.equals(buffer1.array(), buffer2.array());
    } 
} 
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Related Bitmap copyPixelsToBuffer Questions & Answers:

copyPixelsToBuffer Method Overview
Copy the bitmap's pixels into the specified buffer (allocated by the caller).
See Code Examples for other Android Bitmap Methods: