Android Hide App Icon on Launcher

On AndroidManifest.xml remove:
 <category android:name="android.intent.category.LAUNCHER" />

Prevent Launch Browser When Calling loadurl on Webview

WebView myWebView = (WebView) findViewById(R.id.webview);
myWebView.setWebViewClient(new MyWebViewClient());
myWebView.loadUrl("http://www.example.com");



private class HelloWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        view.loadUrl(url);
        return true;
    }
}

Show in Finder in Eclipse

http://www.dansshorts.com/post/show-in-finder-in-eclipse

Filtering data in EditText component in Android

dialogNric.setKeyListener(new NumberKeyListener()
{
@Override
public int getInputType()
{
return InputType.TYPE_MASK_VARIATION;
}
@Override
protected char[] getAcceptedChars()
{
return new char[]{'i','o','p','a','s','d','f','g','h','j','k','l','z','x','q','w','e','r','t','y','u','c','v','b','n','m','1','2','3','4','5','6','7','8','9','0'};
}
});

validate an phone number on Android

public final static boolean isValidPhone(CharSequence target) {
   if (target == null) {
       return false;
   } else {
       return android.util.Patterns.PHONE.matcher(target).matches();
   }
}

Validate an e-mail address on Android

public final static boolean isValidEmail(CharSequence target) {
    if (target == null) {
        return false;
    } else {
        return android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
    }
}

Full Screen Dialog

final Dialog instructionDialog = new Dialog(getParent(), android.R.style.Theme);
instructionDialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
instructionDialog.setContentView(getLayoutInflater().inflate(R.layout.dialog_instruction
       , null));
instructionDialog.getWindow().setLayout(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
Button btn = (Button) instructionDialog.findViewById(R.id.btn_instruction);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
instructionDialog.dismiss();
}
});
instructionDialog.show();

Android's NSUserDefaults

//--Init
int myvar = 12;


//--SAVE Data
SharedPreferences preferences = context.getSharedPreferences("MyPreferences", MODE_PRIVATE);  
SharedPreferences.Editor editor = preferences.edit();
editor.putInt("var1", myvar);
editor.commit();


//--READ data       
myvar = preferences.getInt("var1", 0);