I searched the net a lot of time, to make a code like this:
import android.app.Activity;
import android.os.Bundle;
import android.graphics.DrawFilter;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.View;
import android.graphics.drawable.DrawableWrapper;
import android.graphics.drawable.Drawable;
import android.graphics.*;
public class math_math extends DrawableWrapper {
private final DrawFilter DRAW_FILTER =
new PaintFlagsDrawFilter(Paint.FILTER_BITMAP_FLAG, 0);
public math_math(Drawable wrapped) {
super(wrapped);
wrapped.setFilterBitmap(false);
}
@Override
public void draw(Canvas canvas) {
super.draw(canvas);
}
}
In the MainActivity onCreate i run this code to turn off anti aliasing:
imageview1.setImageDrawable(new math_math(getDrawable(R.drawable.auto)));
By the way, the auto is the picture, that i want to see with turned off anti aliasing
BUT there is a big problem
The app did this with the image: https://i.stack.imgur.com/8IlB6.png
But the image should look like this: https://i.stack.imgur.com/UnUzg.png
Please somebody help, what's the problem in my code.
Thanks
You have to do MANUAL scaling if you want to display a small image in a bigger View without trigger the Bitmap auto-scaling:
final Bitmap cSmallBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.auto);
final Bitmap cBigBitmap = Bitmap.createBitmap(600, 600, Bitmap.Config.ARGB_8888);
final Canvas cCanvas = new Canvas(cBigBitmap);
final Paint cPaint = new Paint();
cPaint.setAntiAlias(false);
cPaint.setDither(false);
cPaint.setFilterBitmap(false);
cCanvas.drawBitmap(cSmallBitmap, new Rect(0, 0, cSmallBitmap.getWidth(), cSmallBitmap.getHeight()), new Rect(0, 0, cBigBitmap.getWidth(), cBigBitmap.getHeight()), cPaint);
cImageView.setImageBitmap(cBigBitmap);
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