在android中触摸浮雕位图答案

【问题标题】：Emboss bitmap on touch in android在android中触摸浮雕位图
【发布时间】：2015-01-20 13:35:14
【问题描述】：

我正在开发颜色飞溅应用程序。我在其中使用手指颜料。

现在我想在触摸事件上浮雕位图。我在这里有一个演示，当我应用浮雕时，它会用红色绘制浮雕路径，但我想在触摸时在位图后面浮雕。

private Path mPath;
private MaskFilter mEmboss;

public void init(){
    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setDither(true);
    mPaint.setColor(color.RED);
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeJoin(Paint.Join.ROUND);
    mPaint.setStrokeCap(Paint.Cap.ROUND);
    mPaint.setStrokeWidth(20);
    mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 }, 0.4f, 6, 3.5f);
}



// on click event 
    switch (item.getItemId()) {
        case EMBOSS_MENU_ID:                        
            mPaint.setMaskFilter(mEmboss);
    }



// View Class method

@Override
public void onDraw(Canvas canvas) {
    super.onDraw(canvas);           
    canvas.drawPath(mPath, mPaint);
    canvas.drawPath(circlePath, circlePaint);
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
    float x = ev.getX();
    float y = ev.getY();
    invalidate();
    return true;
}

【问题讨论】：

标签： android bimap emboss

【解决方案1】：

我最终找到了解决方案：

将 BitmapShader 与相同的位图一起使用

private Path mPath;
private MaskFilter mEmboss;

public void init(){
    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setDither(true);
    mPaint.setColor(color.RED);
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeJoin(Paint.Join.ROUND);
    mPaint.setStrokeCap(Paint.Cap.ROUND);
    mPaint.setStrokeWidth(20);
BitmapShader fillBMPshader = new BitmapShader(bm_original, Shader.TileMode.MIRROR, Shader.TileMode.CLAMP);
mPaint.setShader(fillBMPshader);
    mEmboss = new EmbossMaskFilter(new float[] { 1, 1, 1 }, 0.4f, 6, 3.5f);
}    

// onclick event 
    switch (item.getItemId()) {
        case EMBOSS_MENU_ID:                        
            mPaint.setMaskFilter(mEmboss);
    }

// View Class method

@Override
public void onDraw(Canvas canvas) {
    super.onDraw(canvas);           
    canvas.drawPath(mPath, mPaint);
    canvas.drawPath(circlePath, circlePaint);
}

@Override
public boolean onTouchEvent(MotionEvent ev) {
    float x = ev.getX();
    float y = ev.getY();
    invalidate();
    return true;
}

【讨论】：