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