auf Canvas zeichnen

1package com.test.graphics;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.graphics.Canvas;
7import android.graphics.Color;
8import android.graphics.Paint;
9import android.graphics.Paint.Style;
10import android.view.MotionEvent;
11import android.view.SurfaceHolder;
12import android.view.SurfaceView;
13import android.view.View;
14
15public class Panel extends SurfaceView
16 implements SurfaceHolder.Callback{
17
18 private DrawThread _thread;
19 private int _x = 20;
20 private int _y = 20;
21
22 Paint paint = new Paint();
23
24
25 public Panel(Context context) {
26 super(context);
27 getHolder().addCallback(this);
28 _thread = new DrawThread(getHolder(),this);
29 setFocusable(true);
30
31
32 }
33
34
35
36 public boolean onTouchEvent (MotionEvent event){
37 _x = (int) event.getX();
38 _y = (int) event.getY();
39 return true;
40
41 }
42
43 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height){
44
45 }
46
47 public void surfaceCreated (SurfaceHolder holder){
48 _thread.setRunning(true);
49 _thread.start();
50
51 }
52
53 public void surfaceDestroyed(SurfaceHolder holder){
54 boolean retry = true;
55 _thread.setRunning(false);
56
57 while(retry){
58 try{
59 _thread.join();
60 retry = false;
61 }catch(InterruptedException e){
62 }
63
64
65 }
66
67 }
68
69
70 @Override
71 public void onDraw(Canvas canvas) {
72
73 Bitmap _scratch = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
74 canvas.drawColor(Color.BLACK);
75 canvas.drawBitmap(_scratch, _x-(_scratch.getWidth()/2), _y-(_scratch.getHeight()/2), null);
76
77 }
78
79}

1package com.test.graphics;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.graphics.Canvas;
7import android.graphics.Color;
8import android.graphics.Paint;
9import android.graphics.Paint.Style;
10import android.view.MotionEvent;
11import android.view.SurfaceHolder;
12import android.view.SurfaceView;
13import android.view.View;
14
15public class Panel extends SurfaceView
16 implements SurfaceHolder.Callback{
17
18 private DrawThread _thread;
19 private int _x = 20;
20 private int _y = 20;
21
22 Paint paint = new Paint();
23 Bitmap bitmap;
24 Canvas bitmapCanvas;
25 boolean isInitialized;
26
27
28 public Panel(Context context) {
29 super(context);
30 getHolder().addCallback(this);
31 _thread = new DrawThread(getHolder(),this);
32 setFocusable(true);
33
34
35 }
36
37
38 private void init()
39 {
40 bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.RGB_565);
41
42 bitmapCanvas = new Canvas();
43 bitmapCanvas.setBitmap(bitmap);
44 bitmapCanvas.drawColor(Color.BLACK);
45
46 isInitialized = true;
47
48 }
49
50
51
52
53
54 public boolean onTouchEvent (MotionEvent event){
55 // _x = (int) event.getX();
56 // _y = (int) event.getY();
57
58
59 bitmapCanvas.drawPoint(event.getX(), event.getY(), paint);
60
61 invalidate();
62
63
64
65 return true;
66
67 }
68
69 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height){
70
71 }
72
73 public void surfaceCreated (SurfaceHolder holder){
74 _thread.setRunning(true);
75 _thread.start();
76
77 }
78
79 public void surfaceDestroyed(SurfaceHolder holder){
80 boolean retry = true;
81 _thread.setRunning(false);
82
83 while(retry){
84 try{
85 _thread.join();
86 retry = false;
87 }catch(InterruptedException e){
88 }
89
90
91 }
92
93 }
94
95
96 @Override
97 public void onDraw(Canvas canvas) {
98
99 if (!isInitialized)
100 init();
101
102 canvas.drawBitmap(bitmap, 0, 0, paint);
103
104 /* Bitmap _scratch = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
105 canvas.drawColor(Color.BLACK);
106 canvas.drawBitmap(_scratch, _x-(_scratch.getWidth()/2), _y-(_scratch.getHeight()/2), null); */
107
108 }
109
110}