[英]How to turn off Anti-Aliasing of an Imageview in Android Java
我在網上搜索了很多時間,做了這樣的代碼:
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);
}
}
在 MainActivity onCreate 我運行此代碼以關閉抗鋸齒:
imageview1.setImageDrawable(new math_math(getDrawable(R.drawable.auto)));
順便說一句,自動是圖片,我想在關閉抗鋸齒的情況下看到
但是有一個大問題
該應用程序使用圖像執行此操作: https://i.stack.imgur.com/8IlB6.png
但圖像應如下所示: https://i.stack.imgur.com/UnUzg.png
請有人幫忙,我的代碼有什么問題。
謝謝
如果要在更大的視圖中顯示小圖像而不觸發 Bitmap 自動縮放,則必須執行手動縮放:
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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