Rotate the image at center axis, by using Rotate Animation. RotateAnimation anim = new RotateAnimation(0.0f, 360.0f, Animation.RELATIVE_TO_SELF, 0.5f,Animation.RELATIVE_TO_SELF, 0.5f);         anim.setInterpolator(new LinearInterpolator());         anim.setRepeatCount(Animation.INFINITE);         anim.setDuration(1500); and set into image like this imageView.startAnimation(anim);

Using ActionBar in lower version of android is big task for developers. Action bar is not compatible in API level 9. Action bar is supporting from HoneyComb version. If developers want to action bar is lower versions, Use the sherlock library. That's best way. Sherlock Library

Change the font of ActionBar title using SpannableString. Just follow the code. SpannableString s = new SpannableString("It's a new font"); s.setSpan(new TypefaceSpan(this, "arial.ttf"), 0, s.length(),        Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); getActionBar().setTitle(s);

Sometimes most of developers now using ActionBar. They need to navigate button on top, if they need just add few lines in the code. getActionBar().setDisplayHomeAsUpEnabled(true); and public boolean onOptionsItemSelected(MenuItem item) { // Take appropriate action for each action item click switch (item.getItemId()) { case android.R.id.home: onBackPressed(); return true; default: return super.onOptionsItemSelected(item); } }

This is transparent level codes of hex codes. 100% — FF 95% — F2 90% — E6 85% — D9 80% — CC 75% — BF 70% — B3 65% — A6 60% — 99 55% — 8C 50% — 80 45% — 73 40% — 66 35% — 59 30% — 4D 25% — 40 20% — 33 15% — 26 10% — 1A 5% — 0D 0% — 00 If you provide 6 hex digits, that means RGB (2 hex digits for each value of red, green and blue). If you provide 8 hex digits, it's an ARGB (2 hex digits for each value of alpha, red, green and blue respectively). So actually you're changing from R=B4, G=55, B=55 to A=B5, R=55, G=55, B=55 which is why it's a mostly-transparent grey colour. http://en.wikipedia.org/wiki/ARGB http://developer.android.com/guide/topics/resources/more-resources.html#Color if you want to some transparent level of color using in layout or widgets, just use like that android:background:"#80FFFFFF"

I'm so happy today, because today is my first web based application released in google play. previously i'm developed the some web based applications, but that's not in google play or any public markets. all are third party usage applications. Now it's time to move some small steps. Current Weather Demo Get the Current Weather Status by City ID and City Name Before that, just signup and get the APPID from http://openweathermap.org/register Get the City ID and City name information from http://openweathermap.org/help/city_list.txt This is just a demo application, soon release the full functionality app. You can download the source from Github Download the App from Google Play  

In EditText, if you want to set the filter, android:inputType="textNoSuggestions|textUri" edittext.setInputType(InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);

Many of web based applications, check the internet connections, before done the web services. You can set the permission for network state, like this <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> Code: public boolean networkAvailability() { ConnectivityManager connectivity = (ConnectivityManager) context .getSystemService(Context.CONNECTIVITY_SERVICE); if (connectivity != null) { NetworkInfo[] info = connectivity.getAllNetworkInfo(); if (info != null) for (int i = 0; i < info.length; i++) if (info[i].getState() == NetworkInfo.State.CONNECTED) { return true; } } return false; }

In java based applications, if you can add the degree symbol in your applications. Just add "\u00b0". Example: String Celsius= "35 \u00b0 C"; 35 °C

celsius= kelvin-273.15; subtract 273.15 from kelvin value, you got the celsius value. public String kevinToCelsius(String kelvin) { double kel, celsius; kel = Double.parseDouble(kelvin); celsius = kel - 273.15; return String.valueOf(celsius).substring(0, 4); }

It's very interesting. Sometimes you got the result as unix timestamp from any backend apis or some results. It's simple method to convert the unix timestamp into date format. // Unix timestamp into time format public String getDateFormat(String dateformat) { long dt = Long.parseLong(dateformat); Date date = new Date(dt * 1000L); // *1000 is to convert seconds to // milliseconds SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm"); // the sdf.setTimeZone(TimeZone.getTimeZone("GMT-4")); String formattedDate = sdf.format(date); return formattedDate; }

Slide Navigation Most of new android applications uses the slide navigation. you can do left to right and right to left slide navigations. Like an gmail or facebook app. I develop the slide navigation app demo. Click Here to download from Google Play Also you can get the source from GitHub App and Source include the Colored ListView, Numbers to Words, Coloring textview examples..

Have a nice day. Now i write the code for changing the textview continuosly using UIThread. Just try out. handler = new Handler(); new Thread(new Runnable() { @Override public void run() { final int totalCount=1000; // TODO Auto-generated method stub for(int i=0;i<totalCount;i++){ try { runOnUiThread(new Runnable() {                        public void run() {                                                 Random r = new Random();                         colorText.setTextColor(Color.rgb(r.nextInt(256),     r.nextInt(256), r.nextInt(256)));                                      ...

To set the other fonts into textview, using Typeface. Copy the fonts into assets folder, Typeface type = Typeface.createFromAsset(getAssets(),"fonts/consolas.ttf"); textInfo.setTypeface(type);

To copy the Database into SDCARD, you can use following code to do that, InputStream myInput = new FileInputStream("/data/data/pack_name/databases/databasename.db"); File directory = new File("/sdcard/some_folder"); if (!directory.exists()) {     directory.mkdirs(); } OutputStream myOutput = new FileOutputStream(directory.getPath() + "/AppName.backup"); byte[] buffer = new byte[1024]; int length; while ((length = myInput.read(buffer)) > 0) {     myOutput.write(buffer, 0, length); } myOutput.flush(); myOutput.close(); myInput.close();

  public class MyDataBase extends SQLiteOpenHelper {     MyDataBase (final Context context) {        super(context, Environment.getExternalStorageDirectory()                 + File.separator + "/DataBase/" + File.separator                 + DATABASE_NAME, null, DATABASE_VERSION);     } Set the permission for READ and WRITE ACCESS.     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

JSON - J ava S cript O bject N otation is lightweight interchange format. JSON is more comfortable than XML. Also fast than the parsing. Most of web services is achieved through this JSON. Some peoples are struggling to create and formatting the JSON strings and arrays. Here i give the links, its very useful for formatting and creating JSON. Just try it and give your feedback. http://jsonviewer.stack.hu/  --> My Best Option. http://jsonformat.com/ http://www.jsoneditoronline.org/ http://jsonformatter.curiousconcept.com/