How Android ScrollView screenshots and pictures are saved to the album

1.1 First, let’s look at your screen capture. This code is flawed and can only be captured once.

 

getWindow().getDecorView().setDrawingCacheEnabled(true);
Bitmap screenBitmap = getWindow().getDecorView().getDrawingCache();
img_display.setImageBitmap(screenBitmap);

 

 

1.2 The following can be intercepted every time (only the visible screen part can be intercepted, the invisible part cannot be intercepted)

 

View decorView = getWindow().getDecorView();
Bitmap screenBitmap = Bitmap.createBitmap(decorView.getWidth(), decorView.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(screenBitmap);
decorView.draw(canvas);

 

 

1.3 Intercept visible and invisible screen parts (except ListView and GridView, only ScrollView and HorizontalScrollView can be intercepted), the reason is that the adaptation mechanism of ListView and GridView is constantly remove and add

Note: The screenshot here is the View instead of the screen

ScrollView and HorizontalScrollView must have only one sub-layout, that is, his sub-layout is used as a container, and it is used as a scroll control

View decorView = getWindow().getDecorView();
ScrollView sv = (ScrollView)findViewById(R.id.scrollbox);
LinearLayout panel= (LinearLayout)sv.findViewById(R.id.scrollbox_panel);
int sumHeight = 0;
for(int i=0;i<panel.getChildCount();i++)
{
  sumHeight += panel.getChildAt(i).getHeight();
}

Bitmap bmp = Bitmap.createBitmap(panel.getWidth(),sumHeight,Config.ARGB_8888);
Canvas canvas = new Canvas(bmp);
decorView.draw(panel);

 

 

The picture is saved using the interface provided by ContentProvider, and the following is the Uri positioning of the album

Images.Media.EXTERNAL_CONTENT_URI

Easiest way to save

//The return value is the Uri protocol string
String uriString = MediaStore.Images.Media.insertImage(context.getContentResolver(), bmp, "screenshot-20141121", "this is my screenshot");

 

/** //Save to a path
        File dir = new File("/sdcard/t/");
        if (!dir.exists()) {
            dir.mkdirs();
        }
        final String photoUrl = "/sdcard/t/" + System.currentTimeMillis() + ".png";//Replace with your own image save path
        final File file = new File(photoUrl);
        try {
            FileOutputStream out = new FileOutputStream(file);
            bm.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace ();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace ();
        }
 **/