Android add border image to ImageView

问题

Is it possible to add a bitmap as border of an ImageView in android dynamically in Java?

I have already tried the following:

Image view in XML and border as shape the result is wrong I want to add bitmap in border.

回答1:

You have got multiple options:

1. Place an other View with the border (also imageview) above your Imageview. Thay might be the simples solution. Just add an other view to your xml and make sure they are overlapping. (Use for example a Relative or FrameLayout as container)

2. Use a Layer List and draw a shape above a Bitmap and add that to your ImageView

3. Write a custom ImageView and use the Canvas to draw the Border in the overwritten onDraw method. E.g. canvas.drawRect(...) its pretty straightforward.

回答2:

The simple way：

A drawable for ImageView's attr that android:foreground

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">


    <stroke android:width="1px" android:color="#ff0000" />

    <solid android:color="@android:color/transparent"/>

</shape>

Then XML,

<ImageView
    android:id="@+id/unreserved_head_image"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:foreground="@drawable/shape_border"
    />

来源：https://stackoverflow.com/questions/34268535/android-add-border-image-to-imageview