Android 实现最新版QQ图像裁剪功能

这是依据翔神那篇高仿微信图像截取改的 能够先去看 Android 高仿微信头像截取 打造不一样的自己定义控件 这篇文章。

眼下还有个小问题。就是截取成圆形图片之后 会有黑色的边框填充。不知道怎么解决。知道怎么解决的大神麻烦告知一声。





改动ClipImageBorderView

@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);

// // 计算矩形区域的宽度
// mWidth = getWidth() - 2 * mHorizontalPadding;
// // 计算距离屏幕垂直边界 的边距
// mVerticalPadding = (getHeight() - mWidth) / 2;
// mPaint.setColor(Color.parseColor("#aa000000"));
// mPaint.setStyle(Style.FILL);
// // 绘制左边1
// canvas.drawRect(0, 0, mHorizontalPadding, getHeight(), mPaint);
// // 绘制右边2
// canvas.drawRect(getWidth() - mHorizontalPadding, 0, getWidth(),
// getHeight(), mPaint);
// // 绘制上边3
// canvas.drawRect(mHorizontalPadding, 0, getWidth() -
// mHorizontalPadding, mVerticalPadding, mPaint);
// // 绘制下边4
// canvas.drawRect(mHorizontalPadding, getHeight() - mVerticalPadding,
// getWidth() - mHorizontalPadding, getHeight(), mPaint);
// // 绘制外边框
// mPaint.setColor(mBorderColor);
// mPaint.setStrokeWidth(mBorderWidth);
// mPaint.setStyle(Style.STROKE);
// canvas.drawRect(mHorizontalPadding, mVerticalPadding, getWidth() -
// mHorizontalPadding, getHeight() - mVerticalPadding, mPaint);

if (rf == null || rf.isEmpty())
{
r = new Rect(0, 0, getWidth(), getHeight());
rf = new RectF(r);
}

mPaint.setStyle(Style.STROKE);

// 在imageview上面画入背景和 圆形
int sc = canvas.saveLayer(rf, null, Canvas.MATRIX_SAVE_FLAG | Canvas.CLIP_SAVE_FLAG | Canvas.HAS_ALPHA_LAYER_SAVE_FLAG | Canvas.FULL_COLOR_LAYER_SAVE_FLAG | Canvas.CLIP_TO_LAYER_SAVE_FLAG | Canvas.ALL_SAVE_FLAG);
mPaint.setColor(Color.parseColor("#aa000000"));
mPaint.setStyle(Style.FILL);
canvas.drawRect(r, mPaint);
mPaint.setXfermode(cur_xfermode);

// mPaint.setStyle(Style.STROKE);
// 绘制圆形
canvas.drawCircle(getWidth() / 2, getHeight() / 2, mRadius, mPaint);
// 绘制边框
canvas.drawCircle(getWidth() / 2, getHeight() / 2, mRadius, mBoderPaint);
canvas.restoreToCount(sc);
mPaint.setXfermode(null);

}

改动 ClipZoomImageView

public Bitmap onClip()
{
// 获取imageview的bitmap

Paint paint = new Paint();

invalidate();
setDrawingCacheEnabled(true);
Bitmap bitmap = getDrawingCache().copy(getDrawingCache().getConfig(), false);
setDrawingCacheEnabled(false);
// 创建你要截取的位图
Bitmap bitmap2 = Bitmap.createBitmap(2 * mRadius, 2 * mRadius, Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap2);

canvas.drawRoundRect(new RectF(0, 0, 2 * mRadius, 2 * mRadius), mRadius, mRadius, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
RectF dst = new RectF(-bitmap.getWidth() / 2 + mRadius, -getHeight() / 2 + mRadius, bitmap.getWidth() - bitmap.getWidth() / 2 + mRadius, getHeight() - getHeight() / 2 + mRadius);
canvas.drawBitmap(bitmap, null, dst, paint);

return bitmap2;
}

更改后的源代码下载