Drawable[] from ArrayList with for loop

Question

Is it possible to generate a Drawable[] with a for loop?

ArrayList:

List<String> list = new ArrayList<String>();
list.add(Environment.getExternalStorageDirectory() + "/App/posters/80348-16.jpg");
list.add(Environment.getExternalStorageDirectory() + "/App/posters/83462-8.jpg");

to

   private Drawable[] mThumbIds = {
        Drawable.createFromPath(Environment.getExternalStorageDirectory() + "/Treevo/posters/80348-16.jpg"), Drawable.createFromPath(Environment.getExternalStorageDirectory() + "/Treevo/posters/83462-8.jpg")
};

My idea:

for (int i = 0; i < list.size(); i++)
{

      //But what I need to do here?

}

My goal is to generate the Items for a GridView .

Answer 1

You can do this:

File dir = Environment.getExternalStorageDirectory();
List<File> list = new ArrayList<File>();
list.add(new File(dir, "App/posters/80348-16.jpg"));
list.add(new File(dir, "App/posters/83462-8.jpg"));

List<Drawable> mThumbs = new ArrayList<Drawable>();
for (File file : list) {
    mThumbs.add(Drawable.createFromPath(file.getPath());
}

If you want to retrieve a list of all .jpg files in the folder, you can construct list like this:

File posterDir = new File(Environment.getExternalStorageDirectory(),
    "App/posters");
List<File> list = new ArrayList<File>();
for (File file : posterDir.listFiles()) {
    if (file.isFile() && file.getName().endsWith(".png")) {
        list.add(file);
    }
}

Answer 2

No sure what kind of path it expects, but you could try Drawable.createFromPath method. Assuming you store in the first list the right paths, you're loop would look like this.-

Drawable[] drawables = new Drawable[list.size()]();

for (int i = 0; i < list.size(); i++) {
    drawables[i] = Drawable.createFromPath(list.get(i));
}

Answer 3

What you need to do is a for each loop. It goes something like this.

List<String> list = new ArrayList<String>();
String[] imgPathList = ... // Add all of the "/App/poster..." strings here

for(String x : imgPathList) {
  list.add(Enviroment.getExternalStorageDirectory() + x);
}

Here is an example with different things.

List<String> list = new ArrayList<String>();
String[] data = {
    "123",
    "456",
    "789"
};

for(String x : data) {
    list.add("Number: " + x);
}

System.out.println(list.toString());

Prints: "[Number: 123, Number: 456, Number: 789]"