Question

我正在使用我正在使用Bitmap的android应用程序，但问题是有时它会向我显示内存不足的错误并且我的应用程序崩溃了。我正在使用位图和BitmapShadder，我的代码在下面给出了我的应用程序显示此错误。

public class CircularImageView extends ImageView {
private int borderWidth = 0;
private int viewWidth;
private int viewHeight;
private Bitmap image;
private Paint paint;
private Paint paintBorder;
private BitmapShader shader;

public CircularImageView(Context context) {
    super(context);
    setup();
}

public CircularImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
    setup();
}

public CircularImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    setup();
}

private void setup() {
    // init paint
    paint = new Paint();
    paint.setAntiAlias(true);

    paintBorder = new Paint();
    setBorderColor(Color.WHITE);
    paintBorder.setAntiAlias(true);
    this.setLayerType(LAYER_TYPE_SOFTWARE, paintBorder);
    // paintBorder.setShadowLayer(4.0f, 0.0f, 2.0f, Color.BLACK);
}

public void setBorderWidth(int borderWidth) {
    this.borderWidth = borderWidth;
    this.invalidate();
}

public void setBorderColor(int borderColor) {
    if (paintBorder != null)
        paintBorder.setColor(borderColor);

    this.invalidate();
}

private void loadBitmap() {
    BitmapDrawable bitmapDrawable = (BitmapDrawable) this.getDrawable();

    if (bitmapDrawable != null)
        image = bitmapDrawable.getBitmap();
}

// @SuppressLint("DrawAllocation")
@Override
public void onDraw(Canvas canvas) {
    // load the bitmap
    loadBitmap();

    // init shader
    if (image != null) {

        // Out Of Memory Error Comes Here.... 

        shader = new BitmapShader(Bitmap.createScaledBitmap(image,canvas.getWidth(), canvas.getHeight(), false),Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        paint.setShader(shader);
        int circleCenter = viewWidth / 2;

        // circleCenter is the x or y of the view's center
        // radius is the radius in pixels of the cirle to be drawn
        // paint contains the shader that will texture the shape
        canvas.drawCircle(circleCenter + borderWidth, circleCenter
                + borderWidth, circleCenter + borderWidth - 4.0f,
                paintBorder);
        canvas.drawCircle(circleCenter + borderWidth, circleCenter
                + borderWidth, circleCenter - 4.0f, paint);
    }
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int width = measureWidth(widthMeasureSpec);
    int height = measureHeight(heightMeasureSpec, widthMeasureSpec);

    viewWidth = width - (borderWidth * 2);
    viewHeight = height - (borderWidth * 2);

    setMeasuredDimension(width, height);
}

private int measureWidth(int measureSpec) {
    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpec);
    int specSize = MeasureSpec.getSize(measureSpec);

    if (specMode == MeasureSpec.EXACTLY) {
        // We were told how big to be
        result = specSize;
    } else {
        // Measure the text
        result = viewWidth;
    }

    return result;
}

private int measureHeight(int measureSpecHeight, int measureSpecWidth) {
    int result = 0;
    int specMode = MeasureSpec.getMode(measureSpecHeight);
    int specSize = MeasureSpec.getSize(measureSpecHeight);

    if (specMode == MeasureSpec.EXACTLY) {
        // We were told how big to be
        result = specSize;
    } else {
        // Measure the text (beware: ascent is a negative number)
        result = viewHeight;
    }

    return (result + 2);
}
}

Answer 1

在清单应用程序代码中尝试此操作。

android:largeHeap="true"

Bitmap Shadder android出现内存不足异常

1 个答案: