thoerup/friendradar/RadarView.java

package dk.thoerup.friendradar;


import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.location.Location;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

//public class RadarView extends View {
public class RadarView extends SurfaceView implements SurfaceHolder.Callback, Runnable {
        
        static final float VERT_CORECTION = 5;
        
        int angle = 0;
        Paint p = new Paint();
        Paint p2 = new Paint();
        Paint p3 = new Paint();
        
        SurfaceHolder surfaceHolder;
        int distanceBase = 500;
        
        String distanceText1;
        String distanceText2;
        String distanceText3;
        String distanceText4;
        
        float textWidth1;
        float textWidth2;
        float textWidth3;
        float textWidth4;
        
        String gpsText = "-";   
        Location currentLocation;
        
        int heading;
        String headingText = "-";
        

        int width; 
        int height; 
        int hcenter; 
        int vcenter; 
        

        boolean mRun = true;
        
        Thread t;
        
        public RadarView(Context context) {
                super(context);
                init();
        }

        
        public RadarView(Context context, AttributeSet attr) {
                super(context,attr);
                init();
        }
        
        public RadarView(Context context, AttributeSet attr, int defstyle) {
                super(context,attr, defstyle);
                init();
        }
        

        void init() {
                p.setColor(0xaa00aa00);//Dark green
                p.setStrokeWidth(2);
                p.setStyle(Paint.Style.STROKE);
                p.setAntiAlias(true);
                p.setTextSize(1);
                
                p2.setStrokeWidth(2);
                p2.setColor(0xff00cc00);//Dark green
                p2.setStyle(Paint.Style.STROKE);
                //p2.setAntiAlias(true);

                
                p3.setStrokeWidth(2);
                p3.setColor(0xff00cc00);//Dark green
                p3.setStyle(Paint.Style.FILL);          

                surfaceHolder = this.getHolder();
                surfaceHolder.addCallback(this);
                
                t = new Thread(this);
                
                updateDistanceTexts();
        }
        
        protected void myDraw(Canvas canvas) {
        
                canvas.drawColor(0xff000000);
                canvas.drawLine(hcenter-5, vcenter-5, hcenter+5, vcenter+5, p);
                canvas.drawLine(hcenter-5, vcenter+5, hcenter+5, vcenter-5, p);
                canvas.drawCircle(hcenter, vcenter+5, 40, p);
                canvas.drawCircle(hcenter, vcenter+5, 80, p);
                canvas.drawCircle(hcenter, vcenter+5, 115, p);
                canvas.drawCircle(hcenter, vcenter+5, 150, p);
                
                canvas.drawText(distanceText1, (width-textWidth1)/2, vcenter+40+6, p3);
                canvas.drawText(distanceText2, (width-textWidth2)/2, vcenter+80+6, p3);
                canvas.drawText(distanceText3, (width-textWidth3)/2, vcenter+115+6, p3);
                canvas.drawText(distanceText4, (width-textWidth4)/2, vcenter+150+6, p3);

                
                final float lineLength = 150;
                angle -= 6;
                
                
                double base = (Math.sin(angle/360.0)*lineLength) + (float)hcenter;
                double height = (Math.cos(angle/360.0)*lineLength) + (float)vcenter;
                height += VERT_CORECTION;
                
                
                canvas.drawLine(hcenter, vcenter, (float)base, (float)height, p2);
                
                
                //left,top,right,bottom
                canvas.drawRoundRect( new RectF(20,360,180,400), 10, 10, p);
                canvas.drawLine(100, 360, 100, 400, p);
                
                canvas.drawLine(45, 380, 75, 380, p); // Minus
                canvas.drawLine(125, 380, 155, 380, p); // Plus
                canvas.drawLine(140, 365, 140, 395, p); // Plus

                // Gps status
                canvas.drawText("Gps accuracy", 10, 20,p3);
                canvas.drawText(gpsText, 10, 40, p3);
                
                // Heading
                canvas.drawText("Heading", 270, 20, p3);
                canvas.drawText(headingText, 280, 40, p3);
                                
                
                drawLocations(canvas);
        }


        @Override //surfaceholder.CallBack
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
                Log.i("surfacChaned()","-");
        }


        @Override
        public void surfaceCreated(SurfaceHolder holder) { //surfaceholder.CallBack
                Log.i("surfacCreated()","-");
                                
                width = this.getWidth();
                height = this.getHeight();
                hcenter = width / 2;
                vcenter = hcenter + 20;
                
                t.start();
        }


        @Override
        public void surfaceDestroyed(SurfaceHolder holder) { //surfaceholder.CallBack
                Log.i("surfacDestroyed()","-");
        mRun = false;
        }
        
    public void run() {
        while (mRun) {
            Canvas c = null;
            try {
                c = surfaceHolder.lockCanvas(null);
                synchronized (surfaceHolder) {
                    //if (mMode == STATE_RUNNING) 
                    //  updatePhysics();
                    myDraw(c);
                }
            } finally {
                // do this in a finally so that if an exception is thrown
                // during the above, we don't leave the Surface in an
                // inconsistent state
                if (c != null) {
                    surfaceHolder.unlockCanvasAndPost(c);
                }
            }
            try {
                Thread.sleep(20);
            } catch (InterruptedException e) {}
        }
    }

    
        @Override
        public boolean onTouchEvent(MotionEvent event) {
                float x = event.getX();
                float y = event.getY(); 
                Log.i("TouchEvent", "Coords: " + x + "," + y );
                if (x>25 && x<95 && y>360 && y<400) { //zoom out
                        Log.i("Button", "Zoom Out");
                        if (distanceBase < 16000) {
                                distanceBase *= 2;
                                updateDistanceTexts();
                        }
                }
                
                if (x>105 && x<175 && y>360 && y<400) {
                        Log.i("Button", "Zoom In"); // zoom in
                        if (distanceBase > 125) {
                                distanceBase /= 2;
                                updateDistanceTexts();
                        }
                }

        
                return false;
        }
        
        void updateDistanceTexts() {
                distanceText1 = formatLength(distanceBase);
                distanceText2 = formatLength(distanceBase*2);
                distanceText3 = formatLength(distanceBase*3);
                distanceText4 = formatLength(distanceBase*4);
                
                textWidth1 = textWidth(distanceText1);
                textWidth2 = textWidth(distanceText2);
                textWidth3 = textWidth(distanceText3);
                textWidth4 = textWidth(distanceText4);
                
        }
        
        float textWidth(String text) {
                float[] width = { 0.0f };
                p3.breakText(text, true, 200, width);
                return width[0];
                
        }
        
        String formatLength(int meters) {
                if (meters == 1500) //yuck, special cases !!!
                        return "1.5 km";
                
                if (meters>=1000)
                        return "" + (meters/1000) + " km";
                else
                        return "" + meters + " m";
        }
        
        void setCurrentLocation(Location loc) {
                currentLocation = loc;
                gpsText = formatLength( (int)loc.getAccuracy());
        }
        
        void setHeading(int head) {
                heading = head;
                headingText = "" + head;
        }
        
        void drawLocations(Canvas canvas) {
                if (currentLocation != null) {
                        Location loc = new Location("gps");
                        loc.setLatitude(56.394908); //Hedemøllevej
                        loc.setLongitude(9.666356); 
                        
        //              loc.setLatitude(56.298307); //Kongensbro
        //              loc.setLongitude(9.669293);
                        
                        loc.setLatitude(56.398577); //Langå
                        loc.setLongitude(9.899515);
                        
                        
                        drawLocation(canvas, loc);
                }
        }
        
        void drawLocation(Canvas canvas, Location location) {
                
                float bearing = currentLocation.bearingTo(location);
                float distance = currentLocation.distanceTo(location);
                
                //Log.e("Bearing to", ""+bearing);
                //Log.e("Distance to", ""+distance);
                
                bearing -= (float) heading;
                
                if (distance <= (distanceBase*4)) {
                        
                        //convert from degrees to radians
                        double bearingRad = Math.toRadians(bearing-90);
                        
                        double hypotenuse = (distance / (distanceBase*4.0)) * 150.0;
                        double vertCathesis = Math.sin(bearingRad)*hypotenuse;
                        double horzCathesis = Math.cos(bearingRad)*hypotenuse;
                        

                        //vertCathesis *= -1.0;
                        
                        vertCathesis += vcenter;
                        horzCathesis += hcenter;
                        
                        vertCathesis += VERT_CORECTION;
                        
                        canvas.drawCircle( (float)horzCathesis, (float)vertCathesis, 3, p3);
                        
                }
        }
        
}
1	package dk.thoerup.friendradar;
2
3
4	import android.content.Context;
5	import android.graphics.Canvas;
6	import android.graphics.Paint;
7	import android.graphics.RectF;
8	import android.location.Location;
9	import android.util.AttributeSet;
10	import android.util.Log;
11	import android.view.MotionEvent;
12	import android.view.SurfaceHolder;
13	import android.view.SurfaceView;
14
15	//public class RadarView extends View {
16	public class RadarView extends SurfaceView implements SurfaceHolder.Callback, Runnable {
17
18	static final float VERT_CORECTION = 5;
19
20	int angle = 0;
21	Paint p = new Paint();
22	Paint p2 = new Paint();
23	Paint p3 = new Paint();
24
25	SurfaceHolder surfaceHolder;
26	int distanceBase = 500;
27
28	String distanceText1;
29	String distanceText2;
30	String distanceText3;
31	String distanceText4;
32
33	float textWidth1;
34	float textWidth2;
35	float textWidth3;
36	float textWidth4;
37
38	String gpsText = "-";
39	Location currentLocation;
40
41	int heading;
42	String headingText = "-";
43
44
45	int width;
46	int height;
47	int hcenter;
48	int vcenter;
49
50
51	boolean mRun = true;
52
53	Thread t;
54
55	public RadarView(Context context) {
56	super(context);
57	init();
58	}
59
60
61	public RadarView(Context context, AttributeSet attr) {
62	super(context,attr);
63	init();
64	}
65
66	public RadarView(Context context, AttributeSet attr, int defstyle) {
67	super(context,attr, defstyle);
68	init();
69	}
70
71
72	void init() {
73	p.setColor(0xaa00aa00);//Dark green
74	p.setStrokeWidth(2);
75	p.setStyle(Paint.Style.STROKE);
76	p.setAntiAlias(true);
77	p.setTextSize(1);
78
79	p2.setStrokeWidth(2);
80	p2.setColor(0xff00cc00);//Dark green
81	p2.setStyle(Paint.Style.STROKE);
82	//p2.setAntiAlias(true);
83
84
85	p3.setStrokeWidth(2);
86	p3.setColor(0xff00cc00);//Dark green
87	p3.setStyle(Paint.Style.FILL);
88
89	surfaceHolder = this.getHolder();
90	surfaceHolder.addCallback(this);
91
92	t = new Thread(this);
93
94	updateDistanceTexts();
95	}
96
97	protected void myDraw(Canvas canvas) {
98
99	canvas.drawColor(0xff000000);
100	canvas.drawLine(hcenter-5, vcenter-5, hcenter+5, vcenter+5, p);
101	canvas.drawLine(hcenter-5, vcenter+5, hcenter+5, vcenter-5, p);
102	canvas.drawCircle(hcenter, vcenter+5, 40, p);
103	canvas.drawCircle(hcenter, vcenter+5, 80, p);
104	canvas.drawCircle(hcenter, vcenter+5, 115, p);
105	canvas.drawCircle(hcenter, vcenter+5, 150, p);
106
107	canvas.drawText(distanceText1, (width-textWidth1)/2, vcenter+40+6, p3);
108	canvas.drawText(distanceText2, (width-textWidth2)/2, vcenter+80+6, p3);
109	canvas.drawText(distanceText3, (width-textWidth3)/2, vcenter+115+6, p3);
110	canvas.drawText(distanceText4, (width-textWidth4)/2, vcenter+150+6, p3);
111
112
113	final float lineLength = 150;
114	angle -= 6;
115
116
117	double base = (Math.sin(angle/360.0)*lineLength) + (float)hcenter;
118	double height = (Math.cos(angle/360.0)*lineLength) + (float)vcenter;
119	height += VERT_CORECTION;
120
121
122	canvas.drawLine(hcenter, vcenter, (float)base, (float)height, p2);
123
124
125
126	//left,top,right,bottom
127	canvas.drawRoundRect( new RectF(20,360,180,400), 10, 10, p);
128	canvas.drawLine(100, 360, 100, 400, p);
129
130	canvas.drawLine(45, 380, 75, 380, p); // Minus
131	canvas.drawLine(125, 380, 155, 380, p); // Plus
132	canvas.drawLine(140, 365, 140, 395, p); // Plus
133
134	// Gps status
135	canvas.drawText("Gps accuracy", 10, 20,p3);
136	canvas.drawText(gpsText, 10, 40, p3);
137
138	// Heading
139	canvas.drawText("Heading", 270, 20, p3);
140	canvas.drawText(headingText, 280, 40, p3);
141
142
143	drawLocations(canvas);
144	}
145
146
147	@Override //surfaceholder.CallBack
148	public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
149	Log.i("surfacChaned()","-");
150	}
151
152
153	@Override
154	public void surfaceCreated(SurfaceHolder holder) { //surfaceholder.CallBack
155	Log.i("surfacCreated()","-");
156
157	width = this.getWidth();
158	height = this.getHeight();
159	hcenter = width / 2;
160	vcenter = hcenter + 20;
161
162	t.start();
163	}
164
165
166	@Override
167	public void surfaceDestroyed(SurfaceHolder holder) { //surfaceholder.CallBack
168	Log.i("surfacDestroyed()","-");
169	mRun = false;
170	}
171
172	public void run() {
173	while (mRun) {
174	Canvas c = null;
175	try {
176	c = surfaceHolder.lockCanvas(null);
177	synchronized (surfaceHolder) {
178	//if (mMode == STATE_RUNNING)
179	// updatePhysics();
180	myDraw(c);
181	}
182	} finally {
183	// do this in a finally so that if an exception is thrown
184	// during the above, we don't leave the Surface in an
185	// inconsistent state
186	if (c != null) {
187	surfaceHolder.unlockCanvasAndPost(c);
188	}
189	}
190	try {
191	Thread.sleep(20);
192	} catch (InterruptedException e) {}
193	}
194	}
195
196
197
198	@Override
199	public boolean onTouchEvent(MotionEvent event) {
200	float x = event.getX();
201	float y = event.getY();
202	Log.i("TouchEvent", "Coords: " + x + "," + y );
203	if (x>25 && x<95 && y>360 && y<400) { //zoom out
204	Log.i("Button", "Zoom Out");
205	if (distanceBase < 16000) {
206	distanceBase *= 2;
207	updateDistanceTexts();
208	}
209	}
210
211	if (x>105 && x<175 && y>360 && y<400) {
212	Log.i("Button", "Zoom In"); // zoom in
213	if (distanceBase > 125) {
214	distanceBase /= 2;
215	updateDistanceTexts();
216	}
217	}
218
219
220	return false;
221	}
222
223	void updateDistanceTexts() {
224	distanceText1 = formatLength(distanceBase);
225	distanceText2 = formatLength(distanceBase*2);
226	distanceText3 = formatLength(distanceBase*3);
227	distanceText4 = formatLength(distanceBase*4);
228
229	textWidth1 = textWidth(distanceText1);
230	textWidth2 = textWidth(distanceText2);
231	textWidth3 = textWidth(distanceText3);
232	textWidth4 = textWidth(distanceText4);
233
234	}
235
236	float textWidth(String text) {
237	float[] width = { 0.0f };
238	p3.breakText(text, true, 200, width);
239	return width[0];
240
241	}
242
243	String formatLength(int meters) {
244	if (meters == 1500) //yuck, special cases !!!
245	return "1.5 km";
246
247	if (meters>=1000)
248	return "" + (meters/1000) + " km";
249	else
250	return "" + meters + " m";
251	}
252
253	void setCurrentLocation(Location loc) {
254	currentLocation = loc;
255	gpsText = formatLength( (int)loc.getAccuracy());
256	}
257
258	void setHeading(int head) {
259	heading = head;
260	headingText = "" + head;
261	}
262
263	void drawLocations(Canvas canvas) {
264	if (currentLocation != null) {
265	Location loc = new Location("gps");
266	loc.setLatitude(56.394908); //Hedemøllevej
267	loc.setLongitude(9.666356);
268
269	// loc.setLatitude(56.298307); //Kongensbro
270	// loc.setLongitude(9.669293);
271
272	loc.setLatitude(56.398577); //Langå
273	loc.setLongitude(9.899515);
274
275
276	drawLocation(canvas, loc);
277	}
278	}
279
280	void drawLocation(Canvas canvas, Location location) {
281
282	float bearing = currentLocation.bearingTo(location);
283	float distance = currentLocation.distanceTo(location);
284
285	//Log.e("Bearing to", ""+bearing);
286	//Log.e("Distance to", ""+distance);
287
288	bearing -= (float) heading;
289
290	if (distance <= (distanceBase*4)) {
291
292	//convert from degrees to radians
293	double bearingRad = Math.toRadians(bearing-90);
294
295	double hypotenuse = (distance / (distanceBase4.0)) 150.0;
296	double vertCathesis = Math.sin(bearingRad)*hypotenuse;
297	double horzCathesis = Math.cos(bearingRad)*hypotenuse;
298
299
300	//vertCathesis *= -1.0;
301
302	vertCathesis += vcenter;
303	horzCathesis += hcenter;
304
305	vertCathesis += VERT_CORECTION;
306
307	canvas.drawCircle( (float)horzCathesis, (float)vertCathesis, 3, p3);
308
309	}
310	}
311
312	}