相关疑难解决方法(0)

好吧,我一直在阅读和搜索,现在我正在撞墙,试图解决这个问题.这是我到目前为止所拥有的:

package com.pockdroid.sandbox;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.widget.ImageView;

public class ShadowImageView extends ImageView {

private Rect mRect;
private Paint mPaint;

public ShadowImageView(Context context)
{
    super(context);
    mRect = new Rect();
    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setShadowLayer(2f, 1f, 1f, Color.BLACK);
}

@Override
protected void onDraw(Canvas canvas) 
{
    Rect r = mRect;
    Paint paint = mPaint;

    canvas.drawRect(r, paint);
    super.onDraw(canvas);
}

@Override
protected void onMeasure(int w, int h)
{
    super.onMeasure(w,h);
    int mH, mW;
    mW = getSuggestedMinimumWidth() < …

我想知道如何在android中的任何常规视图中添加阴影图层.例如:假设我有一个布局xml,显示这样的东西..

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout  
    android:layout_height="wrap_content"  
    android:layout_width="wrap_content"  
    <Button....  
    ...  
</LinearLayout>  

现在当它显示时,我希望它周围有一个阴影.

我如何在右侧设置内部阴影LinearLayout？

如下所示:

图片http://www.part.lt/img/de00b7d49da222d110c0b2c5fd23c7f3567.png