SurfaceView.getDrawingCache() from Camera

1package com.example.surfaceviewscreen;
2
3import java.io.File;
4import java.io.FileOutputStream;
5
6import android.app.Activity;
7import android.graphics.Bitmap;
8import android.hardware.Camera;
9import android.hardware.Camera.PreviewCallback;
10import android.os.Bundle;
11import android.os.Environment;
12import android.view.Menu;
13import android.view.SurfaceHolder;
14import android.view.SurfaceView;
15import android.view.View;
16import android.view.View.OnClickListener;
17import android.widget.Button;
18
19public class MainActivity extends Activity implements SurfaceHolder.Callback,
20 OnClickListener, PreviewCallback {
21
22 private Button open, capture;
23 private Camera camera;
24 private SurfaceView surfaceView;
25 private SurfaceHolder surfaceHolder;
26 private boolean previewing = false;
27
28 private String mScreenshotPath = Environment.getExternalStorageDirectory()
29 + "/aaaSurface";
30
31 @Override
32 public void onCreate(Bundle savedInstanceState) {
33 super.onCreate(savedInstanceState);
34 setContentView(R.layout.main);
35
36 open = (Button) findViewById(R.id.open);
37 capture = (Button) findViewById(R.id.capture);
38
39 open.setOnClickListener(this);
40 capture.setOnClickListener(this);
41
42 surfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
43
44 surfaceHolder = surfaceView.getHolder();
45 surfaceHolder.addCallback(this);
46 surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
47 createFolder();
48
49
50 }
51
52 private void createFolder() {
53 File dir = Environment.getExternalStorageDirectory();
54 File myDir = new File(dir, "aaaSurface");
55 if (myDir.exists() && myDir.isDirectory()) {
56
57 } else {
58 boolean created = myDir.mkdir();
59 System.out.println("Folder created : " + created);
60
61 }
62 }
63
64 @Override
65 public void onClick(View v) {
66 long ce = v.getId();
67
68 if (ce == R.id.open) {
69 if (!previewing) {
70 previewing = true;
71 camera = Camera.open();
72 if (camera != null) {
73 try {
74 camera.setPreviewDisplay(surfaceHolder);
75 camera.setDisplayOrientation(90);
76 camera.startPreview();
77 } catch (Exception e) {
78 e.printStackTrace();
79 }
80 }
81 }
82 } else if (ce == R.id.capture) {
83 saveScreenshot();
84 }
85
86 }
87
88 @Override
89 public void onPreviewFrame(byte[] data, Camera camera) {
90 int[] rgb = decodeYUV420SP(data, 400, 240);
91 Bitmap bmp = Bitmap.createBitmap(rgb, 400, 240, Bitmap.Config.ARGB_8888);
92
93 }
94
95 public int[] decodeYUV420SP(byte[] yuv420sp, int width, int height) {
96 final int frameSize = width * height;
97 int rgb[] = new int[width * height];
98 for (int j = 0, yp = 0; j < height; j++) {
99 int uvp = frameSize + (j >> 1) * width, u = 0, v = 0;
100 for (int i = 0; i < width; i++, yp++) {
101 int y = (0xff & ((int) yuv420sp[yp])) - 16;
102 if (y < 0)
103 y = 0;
104 if ((i & 1) == 0) {
105 v = (0xff & yuv420sp[uvp++]) - 128;
106 u = (0xff & yuv420sp[uvp++]) - 128;
107 }
108 int y1192 = 1192 * y;
109 int r = (y1192 + 1634 * v);
110 int g = (y1192 - 833 * v - 400 * u);
111 int b = (y1192 + 2066 * u);
112 r = r < 0 ? 0 : (r > 262143 ? 262143 : r);
113 g = g < 0 ? 0 : (g > 262143 ? 262143 : g);
114 b = b < 0 ? 0 : (b > 262143 ? 262143 : b);
115 rgb[yp] = 0xff000000 | ((r << 6) & 0xff0000)
116 | ((g >> 2) & 0xff00) | ((b >> 10) & 0xff);
117 }
118 }
119 return rgb;
120 }
121
122 public void saveScreenshot() {
123 /*System.out.println("Preview");
124 surfaceView.buildDrawingCache();
125 Bitmap bmp = Bitmap.createBitmap(surfaceView.getDrawingCache());
126 ByteArrayOutputStream baos = new ByteArrayOutputStream();*/
127
128 View view = findViewById(R.id.rootlayout);
129 View v1 = view.getRootView();
130 v1.setDrawingCacheEnabled(true);
131 Bitmap sourceScreenBmp = v1.getDrawingCache();
132
133 File file = new File(mScreenshotPath + "/" + System.currentTimeMillis()
134 + ".jpg");
135 FileOutputStream fos;
136 try {
137 fos = new FileOutputStream(file);
138 sourceScreenBmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
139 fos.close();
140 } catch (Exception e) {
141 // TODO: handle exception
142 }
143 }
144
145 @Override
146 public boolean onCreateOptionsMenu(Menu menu) {
147 getMenuInflater().inflate(R.menu.main, menu);
148 return true;
149 }
150
151 @Override
152 public void surfaceChanged(SurfaceHolder holder, int format, int width,
153 int height) {
154 // TODO Auto-generated method stub
155
156 }
157
158 @Override
159 public void surfaceCreated(SurfaceHolder holder) {
160 // TODO Auto-generated method stub
161
162 }
163
164 @Override
165 public void surfaceDestroyed(SurfaceHolder holder) {
166 // TODO Auto-generated method stub
167
168 }
169
170}

1camera.setPreviewCallback(new PreviewCallback() {
2
3 @Override
4 public void onPreviewFrame(byte[] data, Camera camera) {
5 System.out.println("Bin drin");
6 int[] rgb = decodeYUV420SP(data, 400, 240);
7 Bitmap bmp = Bitmap.createBitmap(rgb, 400, 240, Bitmap.Config.ARGB_8888);
8
9 }
10 });

1public void saveScreenshot() {
2
3
4 View view = findViewById(R.id.rootlayout);
5 View v1 = view.getRootView();
6 v1.setDrawingCacheEnabled(true);
7 Bitmap bmp = v1.getDrawingCache();
8
9 File file = new File(mScreenshotPath + "/" + System.currentTimeMillis()
10 + ".jpg");
11 FileOutputStream fos;
12 try {
13 fos = new FileOutputStream(file);
14 bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
15 fos.close();
16 } catch (Exception e) {
17 // TODO: handle exception
18 }
19 }

1@Override
2 public void onClick(View v) {
3 long ce = v.getId();
4
5 if (ce == R.id.open) {
6 if (!previewing) {
7 previewing = true;
8 camera = Camera.open();
9 if (camera != null) {
10 try {
11 camera.setPreviewDisplay(surfaceHolder);
12 camera.setDisplayOrientation(90);
13 camera.setPreviewCallback(new PreviewCallback() {
14
15 @Override
16 public void onPreviewFrame(byte[] data, Camera camera) {
17 System.out.println("Bin drin");
18 int[] rgb = decodeYUV420SP(data, 400, 240);
19 bmp = Bitmap.createBitmap(rgb, 400, 240, Bitmap.Config.ARGB_8888);
20 //saveScreenshot(bmp);
21 }
22 });
23 camera.startPreview();
24 } catch (Exception e) {
25 e.printStackTrace();
26 }
27 }
28 }
29 } else if (ce == R.id.capture) {
30 saveScreenshot();
31 }
32
33 }

1public void saveScreenshot() {
2
3 File file = new File(mScreenshotPath + "/" + System.currentTimeMillis()
4 + ".jpg");
5 FileOutputStream fos;
6 try {
7 fos = new FileOutputStream(file);
8 bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
9 fos.close();
10 } catch (Exception e) {
11 // TODO: handle exception
12 }
13 }

1surfaceView.setDrawingCacheEnabled(true);
2 surfaceView.buildDrawingCache();
3 Bitmap bmp = surfaceView.getDrawingCache();

1Alles klar, werde mal morgen nochmal nachschauen. Evlt. über ICQ oder MSN unterhalten!

1int width = camera.getParameters().getPreviewSize().width;
2 int height = camera.getParameters().getPreviewSize().height;