Droideez

A collection of Android utility classes for things I use frequently.

BitmapUtils

Downsample a bitmap to 100x100 from a Uri or resource id.

Bitmap bm = BitmapUtils.with(context).decodeFromUri(someUri, 100, 100);
Bitmap bm = BitmapUtils.with(context).decodeFromResource(R.drawable.someBm, 100, 100);

TypefaceUtils

Create a cache of custom typefaces. Android currently doesn't release or reuse custom typefaces, so if you use them a lot without caching them you're leaking a lot of memory.

// Using 'fonts' as the default assets directory where your fonts live.
MY_STATIC_CACHE = TypefaceUtils.with(context).build();
Typeface myTypeface = MY_STATIC_CACHE.getTypeface("Droideez.ttf");

ViewUtils

Shorthand for commonly used view methods. Use static imports for even shorter-hand.

// No casting required
TextView tv = ViewUtils.view(parentView, R.id.my_text_view);
MyCustomView mcv = ViewUtils.view(parentActivity, R.id.my_custom_view);
ViewUtils.hide(tv);
ViewUtils.show(mcv, this > that);
TextView tv2 = ViewUtils.setText(parentView, R.id.my_other_text_view, "Droideez");

IntentUtils

Tell your home activity to logout. This is a useful way to logout if you have an activity hierarchy that contains a top-level home activity that uses the launch mode "singleTop".

// Set on app launch
IntentUtils.setHomeActivity(HomeActivity.class);
IntentUtils.setLogoutActivity(LoginActivity.class);

// From a child activity
startActivity(IntentUtils.createLogoutIntent(this));
finish();

Check if you should log out in your home activity.

@Override
protected void onNewIntent(Intent i) {
    super.onNewIntent(i);

    if (IntentUtils.logoutIfTold(this, i))
        return;
}

Listen for logouts, maybe clean things up.

// Set on app launch
IntentUtils.setOnLogoutListener(myLogoutListener);

// Some class
public class SomeClass implements OnLogoutListener {
    @Override
    public void onLogout() {
        getSharedPreferences("my.prefs").edit().clear().commit();
        ACTIVE_USER = null;
    }
}

StreamUtils

Close an InputStream quietly:

StreamUtils.closeQuietly(stream);

instead of:

try {
} finally {
    try {
        stream.close()
    } catch (IOException e) {}
}

WindowUtils

Get the dimensions of the default display.

Point dimensions = WindowUtils.with(context).getDimensions();
Bitmap bm = BitmapUtils.with(context).decodeFromUri(someUri, dimensions.x, dimensions.y);

FileUtils

Recursively calculate the size of a directory.

File directory = context.getFilesDir();
long size = FileUtils.calculateSize(directory);

Recursively delete a directory.

FileUtils.deleteDirectory(directory);