Android 实现最新版QQ图像裁剪功能

这是根据翔神那篇高仿微信图像截取改的 可以先去看 Android 高仿微信头像截取 打造不一样的自定义控件 这篇文章。

目前还有个小问题，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。





修改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_S***E_FLAG | Canvas.CLIP_S***E_FLAG | Canvas.HAS_ALPHA_LAYER_S***E_FLAG | Canvas.FULL_COLOR_LAYER_S***E_FLAG | Canvas.CLIP_TO_LAYER_S***E_FLAG | Canvas.ALL_S***E_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);

	}

修改 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;
	}

更改后的源码下载