CODEWITHSUNDEEP
androidlistviewhashmap
Dim
Dim

Reputation: 4807

Read SD card image into ListView

I managed to use drawable image into my listview, but how can I do the same with image from SD card?

ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();

HashMap<String, String> map = new HashMap<String, String>();
map.put("KEY_IMAGE", Integer.toString(R.drawable.a)); //change to SD card
map.put("KEY_LINK", "link");
map.put("KEY_NAME", "name");
menuItems.add(map);

String[] from = { "KEY_IMAGE", "KEY_NAME", "KEY_LINK" };
int[] to =  {R.id.imageView_cell, R.id.list_headline,R.id.list_info };

SimpleAdapter adapter = new SimpleAdapter(getApplicationContext(), menuItems, R.layout.list_view,from, to);

listview.setAdapter(adapter);

Upvotes: 0

Views: 212

Answers (2)

Michael Litvin
Michael Litvin

Reputation: 4126

You can do this without implementing a custom adapter.

You should implement the SimpleAdapter.ViewBinder interface, and invoke setViewBinder() to tell your adapter how to bind the data.

As mentioned by LordRaydenMK, it's good practice to load the images asynchronously (e.g. using Picasso), inside your implementation of setViewValue().

Upvotes: 1

LordRaydenMK
LordRaydenMK

Reputation: 13321

You will have to create a custom adapter and override the getView method. You can find an example here using the best practices for view recycling and View holders.

Loading images, especially in adapters should be done in a background thread so it doesn't slow down the UI.

For background loading you can use a library like Picasso. 

Picasso.with(context).load(new File(...)).into(imageView2);

Upvotes: 0

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