android 自定义LinearLayout 60dp的圆角矩形水印图片

您可以继承LinearLayout类，重写onDraw方法，在该方法中绘制圆角矩形和水印图片。以下是一个示例代码：

public class WatermarkLayout extends LinearLayout {

    private Paint mPaint;
    private Bitmap mWatermarkBitmap;

    public WatermarkLayout(Context context) {
        super(context);
        init();
    }

    public WatermarkLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public WatermarkLayout(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        mPaint = new Paint();
        mPaint.setColor(Color.parseColor("#80000000")); //设置圆角矩形颜色
        mPaint.setAntiAlias(true); //抗锯齿
        mPaint.setStyle(Paint.Style.FILL);

        mWatermarkBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.watermark); //加载水印图片
    }

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

        int radius = dp2px(30); //圆角半径
        int width = getWidth();
        int height = getHeight();

        //绘制圆角矩形
        RectF rectF = new RectF(0, 0, width, height);
        canvas.drawRoundRect(rectF, radius, radius, mPaint);

        //绘制水印图片
        int watermarkWidth = mWatermarkBitmap.getWidth();
        int watermarkHeight = mWatermarkBitmap.getHeight();
        int x = (width - watermarkWidth) / 2; //水印图片在LinearLayout中的水平位置
        int y = (height - watermarkHeight) / 2; //水印图片在LinearLayout中的垂直位置
        canvas.drawBitmap(mWatermarkBitmap, x, y, null);
    }

    private int dp2px(int dpValue) {
        float scale = getContext().getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }
}

使用时，将该自定义布局作为父布局，设置宽高为60dp即可：

<com.example.WatermarkLayout
    android:layout_width="60dp"
    android:layout_height="60dp"
    android:gravity="center"
    android:orientation="horizontal">

    <!-- 子控件 -->

</com.example.WatermarkLayout>