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POhow to display bitmap pixel by pixel?
 

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    <p>i am trying to display a bitmap image pixel by pixel (which explicitly means with some delay). i am using two "for" loops to do that but it prints only a single row of pixel...... if anyone has any idea on how to do???? Pls help..... my code is this........</p> <pre><code>Button start = (Button) findViewById(R.id.start); start.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //Toast.makeText(getBaseContext(), "Printing...", Toast.LENGTH_SHORT).show(); iImageArray = new int[bMap.getWidth()* bMap.getHeight()]; //initializing the array for the image size bMap.getPixels(iImageArray, 0, bMap.getWidth(), 0, 0, bMap.getWidth(), bMap.getHeight()); //copy pixel data from the Bitmap into the 'intArray' array //Canvas canvas = new Canvas (bMap); //replace the red pixels with yellow ones for (int i=0; i &lt; bMap.getHeight(); i++) { for(int j=0; j&lt;bMap.getWidth(); j++) { iImageArray[j] = 0xFFFFFFFF; } } bMap = Bitmap.createBitmap(iImageArray, bMap.getWidth(), bMap.getHeight(), Bitmap.Config.ARGB_8888);//Initialize the bitmap, with the replaced color image.setImageBitmap(bMap); //canvas.drawPoints(iImageArray, 0, bMap.getHeight()*bMap.getWidth(), paint); } }); </code></pre> <p>and i want to print the bitmap in grayscale and for that i found this code....</p> <pre><code> public Bitmap toGrayscale(Bitmap bmpOriginal) { int width, height; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); Canvas c = new Canvas(bmpGrayscale); Paint paint = new Paint(); ColorMatrix cm = new ColorMatrix(); cm.setSaturation(0); ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm); paint.setColorFilter(f); c.drawBitmap(bmpOriginal, 0, 0, paint); return bmpGrayscale; } </code></pre> <p>iImageArray[i] = 0xFFFFFFFF; i have this to test, not the actual grayscale value.....</p>
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