Membuat Aplikasi Arah Kiblat Sederhana

   Untuk tutorial kali ini kita akan mencoba membuat aplikasi arah kiblat sederhana untuk android. Yang sebenarnya sudah saya gunakan dibeberapa aplikasi. Tapi untuk yang cuman aplikasi arah kiblat aja kebetulan barusan saya upload ke Google Play, linknya ada disini : Simple Qibla Locator.

Bagaimana cara membuatnya? Silahkan ikuti step by step tutorialnya :

1. Buat projek baru dengan nama 'SimpleQiblaLocator' atau terserah teman-teman.

2. Buat kode program pada 'MainActivity.java' dan jangan lupa masukkan background di folder res ->Drawable : bg_kiblat3.png karena kebetulan pada projek ini background-nya saya namain seperti itu di kodingannya.

import android.app.Activity;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.content.Context;
import android.content.pm.LabeledIntent;
import android.content.res.Resources;
import android.graphics.*;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.Config;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;


public class Kiblat extends Activity {


private static final String TAG = "Compass";

private SensorManager mSensorManager;
private Sensor mSensor;
private SampleView kiblat;
private float[] mValues;
private double lonMosque;
private double latMosque;
private LocationManager lm;
private LocationListener locListenD;


//for finding north direction
private final SensorEventListener mListener = new SensorEventListener() {
public void onSensorChanged(SensorEvent event) {
if (Config.DEBUG) Log.d(TAG,
"sensorChanged (" + event.values[0] + ", " + event.values[1] + ", " + event.values[2] + ")");
mValues = event.values;
if (kiblat != null) {
kiblat.invalidate();
}
}


public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
};


@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);
mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ORIENTATION);
kiblat = new SampleView(this);
setContentView(kiblat);

// for calling the gps
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location loc = lm.getLastKnownLocation("gps");

// ask the Location Manager to send us location updates
locListenD = new DispLocListener();
lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);

locListenD = new DispLocListener();
lm.requestLocationUpdates("gps", 30000L, 10.0f, locListenD);
}

//finding kabah location
private double QiblaCount(double lngMasjid, double latMasjid) {
double lngKabah=39.82616111;
double latKabah=21.42250833;
double lKlM=(lngKabah-lngMasjid);
double sinLKLM= Math.sin(lKlM*2.0*Math.PI/360);
double cosLKLM= Math.cos(lKlM*2.0*Math.PI/360);
double sinLM = Math.sin(latMasjid *2.0 * Math.PI/360);
double cosLM = Math.cos(latMasjid *2.0 * Math.PI/360);
double tanLK = Math.tan(latKabah*2*Math.PI/360);
double denominator= (cosLM*tanLK)-sinLM*cosLKLM;

double Qibla;
double direction;

Qibla = Math.atan2(sinLKLM, denominator)*180/Math.PI;
direction= Qibla<0 ? Qibla+360 : Qibla;
return direction;

}


//resume location update when we are resume
@Override
protected void onResume()
{
if (Config.DEBUG) Log.d(TAG, "onResume");
super.onResume();


mSensorManager.registerListener(mListener, mSensor,
SensorManager.SENSOR_DELAY_GAME);
}


//stop location update when we are stop
@Override
protected void onStop()
{
if (Config.DEBUG) Log.d(TAG, "onStop");
mSensorManager.unregisterListener(mListener);
super.onStop();
}


private class SampleView extends View {
private Paint mPaint = new Paint();
private Path mPath = new Path();
private boolean mAnimate;



public SampleView(Context context) {
super(context);


// Construct a wedge-shaped path
mPath.moveTo(0, -100);
mPath.lineTo(20, 120);
mPath.lineTo(0, 100);
mPath.lineTo(-20, 120);
mPath.close();
}


//make an arrow for pointing direction

protected void onDraw(Canvas canvas) {
Paint paint = mPaint;

this.setBackgroundResource(R.drawable.bg_kiblat3);

paint.setAntiAlias(true);
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.FILL_AND_STROKE);


int w = canvas.getWidth();
int h = canvas.getHeight();
int cx = w / 2;
int cy = h / 2;
float Qibla=(float) QiblaCount(lonMosque,latMosque);
// float Qiblat = mValues [0] + Qibla;
canvas.translate(cx, cy);
if (mValues != null) {
canvas.rotate(-(mValues[0]+ Qibla));
}
canvas.drawPath(mPath, mPaint);
}


@Override
protected void onAttachedToWindow() {
mAnimate = true;
if (Config.DEBUG) Log.d(TAG, "onAttachedToWindow. mAnimate=" +mAnimate);
super.onAttachedToWindow();
}


@Override
protected void onDetachedFromWindow() {
mAnimate = false;
if (Config.DEBUG) Log.d(TAG, "onDetachedFromWindow. mAnimate=" +mAnimate);
super.onDetachedFromWindow();
}

}

private class DispLocListener implements LocationListener {
public void onLocationChanged(Location loc) {
// update TextViews
latMosque = loc.getLatitude();
lonMosque = loc.getLongitude();
}

public void onProviderDisabled(String provider) {
}

public void onProviderEnabled(String provider) {
}

public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
}
3. Jangan lupa tambahin Permission di AndroidManifest.xml

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

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

4. RUN dan lihat hasilnya

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