Android获取所有ListView项目的屏幕截图

  • Z时代
  • 2024-01-10
  • 分类：问答

View v = rootView.findViewById(R.id.layout1);
if (v != null) {
    v.buildDrawingCache();
    Bitmap bitmap = v.getDrawingCache();
    canvas.drawBitmap(bitmap, dummyMatrix, null);
    v.destroyDrawingCache();   
}

我有这个代码。但是我需要对所有ListView项进行屏幕截图，但是如果我的Listview的项多于屏幕上的可见项，则当这些项大于可见的rect时，不会捕获此代码。

如何正确捕获我的ListView？

我创建的新工作代码

public static Bitmap getWholeListViewItemsToBitmap() {
    ListView listview    = MyActivity.mFocusedListView;
    ListAdapter adapter  = listview.getAdapter(); 
    int itemscount       = adapter.getCount();
    int allitemsheight   = 0;
    List<Bitmap> bmps    = new ArrayList<Bitmap>();
    for (int i = 0; i < itemscount; i++) {
        View childView      = adapter.getView(i, null, listview);
        childView.measure(MeasureSpec.makeMeasureSpec(listview.getWidth(), MeasureSpec.EXACTLY), 
                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight());
        childView.setDrawingCacheEnabled(true);
        childView.buildDrawingCache();
        bmps.add(childView.getDrawingCache());
        allitemsheight+=childView.getMeasuredHeight();
    }
    Bitmap bigbitmap    = Bitmap.createBitmap(listview.getMeasuredWidth(), allitemsheight, Bitmap.Config.ARGB_8888);
    Canvas bigcanvas    = new Canvas(bigbitmap);
    Paint paint = new Paint();
    int iHeight = 0;
    for (int i = 0; i < bmps.size(); i++) {
        Bitmap bmp = bmps.get(i);
        bigcanvas.drawBitmap(bmp, 0, iHeight, paint);
        iHeight+=bmp.getHeight();
        bmp.recycle();
        bmp=null;
    }
    return bigbitmap;
}

回答：

工作代码：

public static Bitmap getWholeListViewItemsToBitmap() {
    ListView listview    = MyActivity.mFocusedListView;
    ListAdapter adapter  = listview.getAdapter(); 
    int itemscount       = adapter.getCount();
    int allitemsheight   = 0;
    List<Bitmap> bmps    = new ArrayList<Bitmap>();
    for (int i = 0; i < itemscount; i++) {
        View childView      = adapter.getView(i, null, listview);
        childView.measure(MeasureSpec.makeMeasureSpec(listview.getWidth(), MeasureSpec.EXACTLY), 
                MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
        childView.layout(0, 0, childView.getMeasuredWidth(), childView.getMeasuredHeight());
        childView.setDrawingCacheEnabled(true);
        childView.buildDrawingCache();
        bmps.add(childView.getDrawingCache());
        allitemsheight+=childView.getMeasuredHeight();
    }
    Bitmap bigbitmap    = Bitmap.createBitmap(listview.getMeasuredWidth(), allitemsheight, Bitmap.Config.ARGB_8888);
    Canvas bigcanvas    = new Canvas(bigbitmap);
    Paint paint = new Paint();
    int iHeight = 0;
    for (int i = 0; i < bmps.size(); i++) {
        Bitmap bmp = bmps.get(i);
        bigcanvas.drawBitmap(bmp, 0, iHeight, paint);
        iHeight+=bmp.getHeight();
        bmp.recycle();
        bmp=null;
    }
    return bigbitmap;
}

以上是 Android获取所有ListView项目的屏幕截图 的全部内容， 来源链接： utcz.com/qa/413692.html

回到顶部