android中Imageview的圆角

Rounded corners for an Imageview in android(android中Imageview的圆角)

问题描述

我在线性布局中有一个 textview 和 imageview.Textview 在顶部，imageview 在底部.我使用下面的线为线性布局设置圆角.但是 imageview 的角不是圆角的.我看到只有线性布局的顶角是四舍五入的.我怎样才能使 imageview 的底角变圆?(如果我删除 imageview，我看到所有的角都是圆角的)

I have a textview and imageview inside a linearlayout. Textview is at top and imageview at bottom. I used below lines to have rounded corners for linearlayout. But imageview corners are not rounding. I see only top corners of linearlayout are rounding. How can i have rounded bottom corners of imageview? ( I see all the corners are rounded if i remove imageview)

rounded_corners.xml

rounded_corners.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >

<solid android:color="#ffffff" />


<corners
    android:bottomLeftRadius="8dp"
    android:bottomRightRadius="8dp"
    android:topLeftRadius="8dp"
    android:topRightRadius="8dp" />

</shape>

main.xml

  <LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_marginBottom="50dp"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="50dp"
    android:background="@xml/rounded_corners"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="xxxxxxxx" />

    <ImageView     
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:scaleType="centerCrop"
        android:src="@drawable/my_image_view" />
</LinearLayout>

屏幕截图:

推荐答案

可以把图片的左下角和右下角弄圆，像这样:

you can make the image's left bottom and right bottom corner rounded,like this:

代码:

public static Bitmap getRoundCornerBitmap(Bitmap bitmap, int radius) {
    int w = bitmap.getWidth();
    int h = bitmap.getHeight();
    Bitmap output = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    final RectF rectF = new RectF(0, 0, w, h);

    canvas.drawRoundRect(rectF, radius, radius, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, null, rectF, paint);

    /**
     * here to define your corners, this is for left bottom and right bottom corners
     */
    final Rect clipRect = new Rect(0, 0, w, h - radius);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC));
    canvas.drawRect(clipRect, paint);

    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, null, rectF, paint);

    bitmap.recycle();

    return output;
}

这种方法可以给你一个左下角和右下角圆角的图像.

this method can give you a image with left bottom and right bottom corner rounded.

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