将动态添加的项目保存在布局中

Question

How do I save dynamicaly (through code) added items in layout? I mean, I added two imageViews into layout through code, but when I switch to another layout, and then get back to this one, imageViews are gone (they aren't here).

Code:

LinearLayout layout = (LinearLayout) findViewById(R.id.linear);

ImageView imageView = new ImageView(this);
imageView.setId(i);
imageView.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher));

layout.addView(imageView);

Answer 1

When you say a second layout, do you mean a second activity ?

If yes, you can use the intent to transmit the images to the second layout, and then transmit it back to the first activity.

ArrayList<Bitmap> bitmaps = new ArrayList<Bitmap>();
bitmaps.add(yourimage);
Intent intent = new Intent(A1.this, A2.class);
intent.putParcelableArrayListExtra("bitmaps", bitmaps);
startActivity(intent);

You can take it in the second Activity with :

 Intent intent = getIntent();
 if(intent.hasExtra("bitmaps")){
            ArrayList<Bitmap> bitmaps=  intent.getExtras().getParcelableArrayList("bitmaps");
        }