Я студент и занимаюсь разработкой Android 2.2 для проекта.Для своих тестов и выполнения приложений я использую HTC Desire HD (с Android 2.2).
Я просто хочу создать композит (класс) для съемки с помощью мобильного устройства.У меня есть класс Android, который я использую для метода getOptimalPreviewSize () (этот метод в ApiDemos 2.2).Этот метод используется для исправления этого типа ошибки:
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): java.lang.RuntimeException: Fail to connect to camera service
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.hardware.Camera.native_setup(Native Method)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.hardware.Camera.<init>(Camera.java:118)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.hardware.Camera.open(Camera.java:91)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at com.example.android.apis.graphics.Preview.surfaceCreated(CameraPreview.java:69)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.SurfaceView.updateWindow(SurfaceView.java:540)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:339)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewGroup.drawChild(ViewGroup.java:1660)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1389)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.View.draw(View.java:6764)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.widget.FrameLayout.draw(FrameLayout.java:352)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewGroup.drawChild(ViewGroup.java:1662)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1389)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.View.draw(View.java:6764)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.widget.FrameLayout.draw(FrameLayout.java:352)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1887)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewRoot.draw(ViewRoot.java:1422)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewRoot.performTraversals(ViewRoot.java:1167)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.view.ViewRoot.handleMessage(ViewRoot.java:1744)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.os.Handler.dispatchMessage(Handler.java:99)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.os.Looper.loop(Looper.java:143)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at android.app.ActivityThread.main(ActivityThread.java:5068)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at java.lang.reflect.Method.invokeNative(Native Method)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at java.lang.reflect.Method.invoke(Method.java:521)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
02-14 21:38:05.818: ERROR/AndroidRuntime(2884): at dalvik.system.NativeStart.main(Native Method)
Итак, я исправил эту проблему с помощью этого кода:
public class CameraView extends Activity implements SurfaceHolder.Callback {
private SurfaceView mSurfaceView = null;
private SurfaceHolder mSurfaceHolder = null;
private Camera mCamera = null;
private boolean mPreviewRunning = false;
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
//requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.camera_surface);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
if (!(android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)))
{
Toast
.makeText(CameraView.this, R.string.msgNoSdCard, Toast.LENGTH_LONG)
.show();
}
else
{
Toast
.makeText(CameraView.this, R.string.msgPressBackBt, Toast.LENGTH_LONG)
.show();
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
mCamera = Camera.open();
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException exception) {
mCamera.release();
mCamera = null;
// TODO: add more exception handling logic here
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mPreviewRunning = false;
mCamera.release();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
//Handle the back button
if ((keyCode == KeyEvent.KEYCODE_DPAD_CENTER) || (keyCode == KeyEvent.KEYCODE_CAMERA)){
mCamera.takePicture(shutterCallback, rawCallback, jpegCallback);
return true;
}
else {
return super.onKeyDown(keyCode, event);
}
}
ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
}
};
/** Handles data for raw picture */
PictureCallback rawCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
}
};
/** Handles data for jpeg picture */
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
// write to local sandbox file system
//outStream =
//CameraView.this.openFileOutput(String.format("%d.jpg",
//System.currentTimeMillis()), 0);
// Or write to sdcard
long fileName = System.currentTimeMillis();
outStream = new FileOutputStream(String.format(
"/sdcard/%d.jpg", fileName));
outStream.write(data);
outStream.close();
Intent resultIntent = new Intent();
String imageFileName = String.format("/sdcard/%d.jpg", fileName);
resultIntent.putExtra("MyAvatar", imageFileName);
setResult(Activity.RESULT_OK, resultIntent);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
finally {
}
}
};
private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) {
final double ASPECT_TOLERANCE = 0.05;
double targetRatio = (double) w / h;
if (sizes == null) return null;
Size optimalSize = null;
double minDiff = Double.MAX_VALUE;
int targetHeight = h;
// Try to find an size match aspect ratio and size
for (Size size : sizes) {
double ratio = (double) size.width / size.height;
if (Math.abs(ratio - targetRatio) > ASPECT_TOLERANCE) continue;
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
// Cannot find the one match the aspect ratio, ignore the requirement
if (optimalSize == null) {
minDiff = Double.MAX_VALUE;
for (Size size : sizes) {
if (Math.abs(size.height - targetHeight) < minDiff) {
optimalSize = size;
minDiff = Math.abs(size.height - targetHeight);
}
}
}
return optimalSize;
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
Camera.Parameters parameters = mCamera.getParameters();
List<Size> sizes = parameters.getSupportedPreviewSizes();
Size optimalSize = getOptimalPreviewSize(sizes, w, h);
parameters.setPreviewSize(optimalSize.width, optimalSize.height);
mCamera.setParameters(parameters);
mCamera.startPreview();
}
}
Последняя проблема: если устройство отображаетCamera View, устройство полностью дезориентировано.Если я указываю камеру на верхнюю часть комнаты (сцена, которая снимается), экран уходит влево, если я кладу камеру на землю, экран уходит вправо.Та же проблема с альбомным экраном с неправильной высотой и шириной и ориентацией камеры.
Есть ли решение, чтобы решить эту проблему с API камеры с HTC Desire HD?
Спасибо,
Ссылки по теме:
Android 2.2 SDK - не удалось задать параметры для API камеры на Nexus One
http://code.google.com/p/android/issues/detail?id=7909