codeswimmer’s gists

codeswimmer / Android: Determine If You're Running on the Main UI Thread

Created February 17, 2011 21:45

Android: determine if you're running on the main UI thread

	package com.codeswimmer.android.util;

	import android.os.Looper;

	public class ThreadUtil {

	public static final boolean isRunningOnUiThread() {
	return Looper.getMainLooper().getThread() == Thread.currentThread();
	}
	}

codeswimmer / Android.Bitmap.Rotate

Created March 7, 2011 17:25

Android: rotate a bitmap

	public Bitmap rotateBitmap(Bitmap original, float degrees) {
	int width = original.getWidth();
	int height = original.getHeight();

	Matrix matrix = new Matrix();
	matrix.preRotate(degrees);

	Bitmap rotatedBitmap = Bitmap.createBitmap(original, 0, 0, width, height, matrix, true);
	Canvas canvas = new Canvas(rotatedBitmap);
	canvas.drawBitmap(original, 5.0f, 0.0f, null);

codeswimmer / Android.Set.Orientation

Created March 10, 2011 01:19

Android: programmatically set screen orientation

	Use this to make it landscape:
	setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

	...and this to make it portrait:
	setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

codeswimmer / Android.getDeviceSerialNumber()

Created March 10, 2011 01:40

Android: get a device's serial number

	public static String getDeviceSerialNumber(Context context) {
	TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
	return telephonyManager.getDeviceId();
	}

codeswimmer / Android determine screen orientation

Created March 11, 2011 21:09

Android: determine current screen orientation

	public static final int determineCurrentScreenOrientation(Context context) {
	Display display = ((WindowManager) context.getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
	int orientation = display.getOrientation();
	}

codeswimmer / Android Horizontal Scrollable GridView

Created March 14, 2011 19:16

Android: GridView that scrolls horizontally and vertically

	public class Test extends Activity {
	GridView gv;
	Gallery g[] = new Gallery[3];
	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);
	gv = (GridView)findViewById(R.id.gridview);
	gv.setAdapter(new GAdapter());
	for (int i = 0; i < g.length; i++) {

codeswimmer / Android: AsyncTaskLoader<D> Skeleton

Created March 24, 2011 04:42

Android: AsyncTaskLoader Fragment

	public class RetrievedDataFragment extends Fragment implements LoaderManager.LoaderCallbacks<D> {

	public RetrievedDataFragment() {
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);

	getLoaderManager().initLoader(0, null, this);

codeswimmer / Android: Determine if the Device Currently Has Network Connectivity

Created March 30, 2011 16:46

Android: determine if the device currently has any network connectivity (mobile internet or wifi).

	public static final boolean hasNetworkConnectivity(Context context) {
	ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
	NetworkInfo wifi = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
	NetworkInfo mobile = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
	return (wifi.isAvailable() \|\| mobile.isAvailable())
	}

codeswimmer / Android: MotionEvent.ACTION converted to String

Created April 3, 2011 20:34

Android: covert the given MotionEvent.getAction() result into a String.

	public static String eventActionToString(int eventAction) {
	switch (eventAction) {
	case MotionEvent.ACTION_CANCEL: return "Cancel";
	case MotionEvent.ACTION_DOWN: return "Down";
	case MotionEvent.ACTION_MOVE: return "Move";
	case MotionEvent.ACTION_OUTSIDE: return "Outside";
	case MotionEvent.ACTION_UP: return "Up";
	case MotionEvent.ACTION_POINTER_DOWN: return "Pointer Down";
	case MotionEvent.ACTION_POINTER_UP: return "Pointer Up";
	}

codeswimmer / Android: How to Determine Current Speed

Created April 4, 2011 13:58

Android: determine the current speed

	public static final float getCurrentSpeed(double location, int formatType) {
	Location location = Location.convert(location, formatType)
	return location.getSpeed();
	}

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