csdear’s gists

csdear / Sensor : Basic : Accelerometer

Created March 14, 2014 18:28

Sensors Reference CodeRepo >> Sensor>>Sensor Raw Accelerometer Sensor Basic 1. In main class, implements SensorEventListener interface. 2. onCreate, get a reference to the SensorManager. 3. Get a reference to the sensor device component -- in this case the accelerometer. 4. Register the listener by calling the registerListener() and set polling …

	package course.examples.Sensors.ShowValues;

	import android.app.Activity;
	import android.hardware.Sensor;
	import android.hardware.SensorEvent;
	import android.hardware.SensorEventListener;
	import android.hardware.SensorManager;
	import android.os.Bundle;
	import android.widget.TextView;

csdear / Providers

Created March 14, 2014 21:19

Providers Acquiring and Displaying location information from many providers


	package course.examples.Location.GetLocation;

	import java.text.SimpleDateFormat;
	import java.util.Date;
	import java.util.List;
	import java.util.Locale;
	import java.util.concurrent.Executors;
	import java.util.concurrent.TimeUnit;

csdear / ListView and Adapter Creation

Created March 16, 2014 23:24

ListView and Adapter Creation Reference Coursera Wk7 Location Lab

	mAdapter = new PlaceViewAdapter (getApplicationContext());
	ListView listview = getListView();
	listview.setAdapter(mAdapter);

csdear / TextView Creating and Adding to a ListView

Created March 16, 2014 23:28

TextView Creating and Adding to a ListView Reference Coursera Wk7, Location Lab

	TextView footer = (TextView) getLayoutInflater().inflate(R.layout.footer_view, null);
	listView.addFooterView(footer);

csdear / onCreate

Created March 17, 2014 04:13

onCreate() With a Listview Adapter Note : Always put addFooterView before the setAdapter method -- my footerView was not displaying because of this. I assume this goes for any add###View method, bust come after the setAdapter() or error or won't display.

	***basic onCreate

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);


	***
	//onCreate, with adapters and adding view

csdear / SharedPreferences

Created March 20, 2014 15:52

SharedPreferences 1. Restoring preferences 2. Making preference changes through the SharedPreferences editor object 3. Commiting new preference changes

	public class Calc extends Activity {
	public static final String PREFS_NAME = "MyPrefsFile";

	@Override
	protected void onCreate(Bundle state){
	super.onCreate(state);
	. . .

	// Restore preferences
	SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0);

csdear / Extending a Class

Created March 20, 2014 19:53

Extending a Class

	//Use the Extends keyword to extend from superclass.
	class MountainBike extends Bicycle {

	// new fields and methods defining
	// a mountain bike would go here

	}

csdear / Implementing An Interface

Created March 20, 2014 20:26

Implementing An Interface

	interface Bicycle {
	// wheel revolutions per minute
	void changeCadence(int newValue);
	void changeGear(int newValue);
	void speedUp(int increment);
	void applyBrakes(int decrement);
	}

	class ACMEBicycle implements Bicycle {

csdear / RandomNumber

Created March 23, 2014 17:05

Random Number Generation See CodeRepo Android>> SharedPreferenceReadWriteActivity.java

	//Import util random class
	import java.util.Random;

	//Sample method for a buttons on click listener.
	@Override
	public void onClick(View v) {

	//Create a new instance of a Random Object
	Random r = new Random();
	//Create a var 'val' to hold the new random number

csdear / Reset Button

Created March 23, 2014 17:07

Reset Button Uses SharedPreferences Editor to edit the highscore and then set both values to zero. See code Repo SharedPReferenceREadWriteActivity.java


	// Reset Button
	final Button resetButton = (Button) findViewById(R.id.reset_button);
	resetButton.setOnClickListener(new OnClickListener() {

	@Override
	public void onClick(View v) {

	// Set high score to 0
	SharedPreferences.Editor editor = prefs.edit();

Stuart Dear csdear