Android仿qq未读消息_仿qq消息红点拖拽删除源代码

本Demo是一款仿qq未读消息、拖拽删除的例子、继承RelativeLayout的WaterDrop实现了圆形图标功能、继承ImageView的CircleImageView圆形图片功能、效果非常不错、很适合有圆形设计的哥们、效果图片如下

CircleImageView核心代码

private void updateShaderMatrix() {
    float scale;
    float dx = 0;
    float dy = 0;
    mShaderMatrix.set(null);
    if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width()
            * mBitmapHeight) {
        scale = mDrawableRect.height() / (float) mBitmapHeight;
        dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;
    } else {
        scale = mDrawableRect.width() / (float) mBitmapWidth;
        dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;
    }
    mShaderMatrix.setScale(scale, scale);
    mShaderMatrix.postTranslate((int) (dx   0.5f)   mBorderWidth,
        (int) (dy   0.5f)   mBorderWidth);

    mBitmapShader.setLocalMatrix(mShaderMatrix);
}

WaterDrop核心代码

public boolean onTouchEvent(MotionEvent event) {
    ViewGroup parent = getScrollableParent();
    switch (event.getAction()) {
    case MotionEvent.ACTION_DOWN:
        mHolderEventFlag = !CoverManager.getInstance().isRunning();
        if (mHolderEventFlag) {
            parent.requestDisallowInterceptTouchEvent(true);
            CoverManager.getInstance().start(this, event.getRawX(), 
                event.getRawY(), mOnDragCompeteListener);
        }
        break;
    case MotionEvent.ACTION_MOVE:
        if (mHolderEventFlag) {
            CoverManager.getInstance().update(event.getRawX(),
                event.getRawY());
        }
        break;
    case MotionEvent.ACTION_UP:
    case MotionEvent.ACTION_CANCEL:
        if (mHolderEventFlag) {
            parent.requestDisallowInterceptTouchEvent(false);
            CoverManager.getInstance().finish(this, event.getRawX(),
                event.getRawY());
        }
        break;
    }

    return true;
}

最后给贴上Demo的源代码、希望对大家有用、有兴趣的哥们可以下载看看

源代码下载链接: http://dwtedx.com/download.html?bdkey=s/1sjtDrhN 密码: ej8c