android - android中Imageview的圆角

Question

我在线性布局中有一个 TextView 和一个 ImageView 。 Textview 在顶部，imageview 在底部。我使用下面的线条为线性布局设置圆角。但是 imageview 角不是圆的。我只看到 linearlayout 的顶角是圆角的。 我怎样才能使 imageview 的底角变圆？(如果我删除 imageview，我会看到所有的角都是圆的)

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>

主.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:

Answer 1

你可以把图片的左下角和右下角做成圆角，像这样:

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;
}

此方法可以为您提供左下角和右下角圆角的图像。