Question

我试过在我能找到的任何地方设置抖动。我也尝试将所有内容设置为ARGB_8888，并且STILL在我的背景图像上存在非常糟糕的条带。我的背景图像是640x960，它在我的物理手机720x1280上工作正常但在运行320x480的模拟器上我得到了不好的色带。我把我的代码放在下面。如果您有任何建议请帮忙！

public void onCreate(Bundle instanceBundle) {
    super.onCreate(instanceBundle);

    Window window = getWindow();
    window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    window.setFormat( PixelFormat.RGBA_8888 );

    surfaceView = new SurfaceView(this);
    setContentView(surfaceView);
    surfaceHolder = surfaceView.getHolder();
    surfaceHolder.setFormat( PixelFormat.RGBA_8888 );

    Display display = getWindowManager().getDefaultDisplay();
    int width = display.getWidth();
    int height = display.getHeight();

    if(width > height) {
        setOffscreenSurface(height, width);
    } else {
        setOffscreenSurface(width, height);
    }

    surfaceView.setFocusableInTouchMode(true);
    surfaceView.requestFocus();
    surfaceView.setOnKeyListener(this);

    background = decodeSampledBitmapFromResource( getResources(), R.drawable.background );
}

public Bitmap decodeSampledBitmapFromResource( Resources res, int resId )
{
    // First decode with inJustDecodeBounds=true to check dimensions
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(res, resId, options);

    // Calculate inSampleSize
    options.inSampleSize = calculateInSampleSize(options );

    // Decode bitmap with inSampleSize set
    options.inJustDecodeBounds = false;
    options.inDither = true;
    options.inPreferredConfig = Bitmap.Config.ARGB_8888;
    return BitmapFactory.decodeResource(res, resId, options);
}

public int calculateInSampleSize( BitmapFactory.Options options )
{
    // Raw height and width of image
    final int height = options.outHeight;
    final int width = options.outWidth;
    int inSampleSize = 1;

    int reqWidth = Math.round( width * vertDispRatio );
    int reqHeight = Math.round( height * horiDispRatio );

    if( height > reqHeight || width > reqWidth )
    {
        // Calculate ratios of height and width to requested height and width
        final int heightRatio = Math.round( (float) height / (float) reqHeight );
        final int widthRatio = Math.round( (float) width / (float) reqWidth );

        // Choose the smallest ratio as inSampleSize value, this will guarantee
        // a final image with both dimensions larger than or equal to the
        // requested height and width.
        inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
    }

    return inSampleSize;
}

@Override
public void onAttachedToWindow() {
    super.onAttachedToWindow();
    Window window = getWindow();
    window.setFormat(PixelFormat.RGBA_8888);
}

public void setOffscreenSurface(int width, int height) {
    if(offscreenSurface != null) offscreenSurface.recycle();
    offscreenSurface = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    canvas = new Canvas(offscreenSurface);
}

Paint paint = new Paint();

public void drawBitmap(Bitmap bitmap, float x, float y)
{ 
    if(canvas != null)
    {
        int pixelX = (int)( x * getFramebufferWidth() );
        int pixelY = (int)( y * getFramebufferHeight() );
        paint.setDither(true);
        canvas.drawBitmap(bitmap, pixelX, pixelY, paint);
    }
}

public void run() {
    int frames = 0;
    long startTime = System.nanoTime();
    long lastTime = System.nanoTime();
    while(true) {
        if( state == State.Running )
        {
            if( !surfaceHolder.getSurface().isValid() )
                continue;

            Canvas canvas = surfaceHolder.lockCanvas();

            long currTime = System.nanoTime();
            float deltaTime = (currTime - lastTime) / 1000000000.0f;
            if( deltaTime > 0.1f )
                deltaTime = 0.1f;

            clearFramebuffer( Color.BLACK );

            drawBitmap( background, 0, 0 );

            src.left = 0;
            src.top = 0;
            src.right = offscreenSurface.getWidth() - 1;
            src.bottom = offscreenSurface.getHeight() - 1;
            dst.left = 0;
            dst.top = 0;
            dst.right = surfaceView.getWidth();
            dst.bottom = surfaceView.getHeight();
            canvas.drawBitmap(offscreenSurface, src, dst, null);

            surfaceHolder.unlockCanvasAndPost(canvas);                
        }
    }        
}

Answer 1

我在代码中的任何地方都没有看到您尝试设置抗锯齿的地方。您也可以使用画布中使用的颜料来完成此操作。应该有帮助，如果不是，你使用的设备可能很糟糕？：P

编辑：

我发誓你可以通过bitmapfactory设置抗锯齿，但我猜不是。你绝对可以从油漆中做到这一点。您可以使用paint.setAntiAlias（aa）方法设置它。

如何修复Android中的图像条带？

1 个答案: