1 獲取當前可見的View的圖片，類似於手機截圖

View dView = getWindow().getDecorView();//獲取DecorView
dView.setDrawingCacheEnabled(true);//生成View的副本，是一個BitmapBitmap bmp = dView.getDrawingCache();//獲取View的副本，就是這個View上面所顯示的任何內容


2 獲取任意View的內容圖片

Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888
 
);
Canvas c = new Canvas(b);//使用bitmap構建一個Canvas，繪製的所有內容都是繪製在此Bitmap上的
Drawable bgDrawable = v.getBackground();
bgDrawable.draw(c);//繪製背景view.draw(c);//繪製前景
return bitmap;

如果是ListView，ScrollView，Webview等高度不固定的View，還需要手動計算出來高度來建立Bitmap，其他步驟相同

for (int i = 0; i < listView.getChildCount(); i++) {
    h += listView.getChildAt(i).getHeight();
}
// 建立對應大小的bitmap
 
bitmap = Bitmap.createBitmap(listView.getWidth(), h,
        Bitmap.Config.ARGB_8888);

//組合view
private Bitmap combineView(View topView, WebView centerView, View bottomView) {

    float topWidth = topView.getWidth();
    float topHeight = topView.getHeight();

    float centerWidth = centerView.getWidth();
    float 
 
centerHeight = centerView.getContentHeight() * centerView.getScale();

    float bottomWidth = bottomView.getWidth();
    float bottomHeight = bottomView.getHeight();

    float width = Math.max(topWidth, Math.max(centerWidth, bottomWidth));//取最大的寬度作為最終寬度
float height = topHeight + centerHeight + bottomHeight;//計算總高度
Bitmap topBitmap = Bitmap.createBitmap((int) width, (int) topHeight, Bitmap.Config
            .ARGB_8888);//頂部圖片
topView.draw(new Canvas(topBitmap));

    Bitmap centerBitmap = Bitmap.createBitmap((int) width, (int) centerHeight, Bitmap.Config
            .ARGB_8888);//中部圖片
centerView.draw(new Canvas(centerBitmap));

    Bitmap bottomBitmap = Bitmap.createBitmap((int) width, (int) bottomHeight, Bitmap.Config
            .ARGB_8888);//底部圖片
bottomView.draw(new Canvas(bottomBitmap));

    Bitmap bitmap = Bitmap.createBitmap((int) width, (int) height, Bitmap.Config.ARGB_8888);//底圖
Canvas canvas = new Canvas(bitmap);//畫布
Paint paint = new Paint();

    canvas.drawBitmap(topBitmap, 0, 0, paint);//畫頂部
canvas.drawBitmap(centerBitmap, 0, topHeight, paint);//畫中間
canvas.drawBitmap(bottomBitmap, 0, topHeight + centerHeight, paint);//畫底部
return bitmap;
}