public class MainActivity extends Activity implements SurfaceHolder.Callback {
protected static final int TAKE_PHOTO_WITH_DATA = 0;
private Button takeButton = null;
private Button identifyButton = null;
private SurfaceView cSurfaceView;
private SurfaceHolder sfh;
Camera camera;
@Override
protected void onDestroy() {
camera.startPreview();
camera.release();
super.onDestroy();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
cSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
sfh = cSurfaceView.getHolder();
sfh.addCallback(this);
sfh.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
takeButton = (Button) findViewById(R.id.take_picture);
takeButton.setOnClickListener(new ButtonListner());
identifyButton = (Button) findViewById(R.id.identify_picture);
identifyButton.setOnClickListener(new ButtonListner());
}
public void onPictureTaken(byte[] data, Camera camera) {
System.out.println(camera);
}
class ButtonListner implements OnClickListener, Camera.PictureCallback {
public void onClick(View v) {
switch (v.getId()) {
case R.id.take_picture:
camera.takePicture(null, this, this, this);
break;
case R.id.identify_picture:
break;
}
}
public void onPictureTaken(byte[] data, Camera camera) {
System.out.println("takenpicture");
}
}
public void surfaceCreated(SurfaceHolder holder) {
camera = Camera.open();
try {
Camera.Parameters parameters = camera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
// 这是一个众所周知但未文档化的特性
parameters.set("orientation", "portrait");
// 对于Android 2.2及以上版本
camera.setDisplayOrientation(90);
parameters.setRotation(90);
} else {
parameters.set("orientation", "landscape");
camera.setDisplayOrientation(0);
parameters.setRotation(0);
}
camera.setParameters(parameters);
camera.setPreviewDisplay(holder);
} catch (IOException exception) {
camera.release();
}
camera.startPreview();
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
camera.startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder) {
}
}