Android SDK code snippets

Google docs page

Button init/listener

Button btn1 = (Button)findViewById(R.id.btn1); //locates it from xml file

btn1.setOnClickListener(new Button.OnClickListener() { public void onClick (View v){ btn1_method(); }}); //calls btn1_method() method

Simple short duration message a.k.a toast

public static void toaster(Context context, String message, int length){

  //Toast.LENGTH_SHORT or Toast.LENGTH_LONG

  Toast.makeText(context, message, length).show();

}

Send sms/text message

<uses-permission android:name="android.permission.SEND_SMS"></uses-permission>

public static void sms(String to, String text){

  SmsManager.getDefault().sendTextMessage(to, null, text, null, null);

}

Get lat/longitude

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

Location loc = lm.getLastKnownLocation("gps");

tvLat.setText("init lat: "+Double.toString(loc.getLatitude()));

tvLong.setText("init long: "+Double.toString(loc.getLongitude()));