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android - Android 上的相机方向

转载 作者：塔克拉玛干 更新时间：2023-11-02 23:30:04 26 4
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friend 们好。我正在创建一个使用相机代码的 Android 应用程序。我用过 android-API 2.1 。我已经在戴尔移动设备上安装了我的应用程序，相机的方向是正确的。但是，我在三星 Galaxy S2 等其他安卓手机上安装了我的应用程序。这里的问题是相机方向，即使在纵向模式下相机也会旋转 90 度。任何人都可以建议我是否需要更改任何相机参数以便相机方向在所有手机上都能正常工作......？这是我的代码:

//class CameraDemo
public class CameraDemo extends Activity {
private static final String TAG = "CameraDemo";
Camera camera;
Preview preview;
Button buttonClick;
Button next;


/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
try
{

super.onCreate(savedInstanceState);
setContentView(R.layout.camdemo);

preview = new Preview(this);
((FrameLayout) findViewById(R.id.preview)).addView(preview);

buttonClick = (Button) findViewById(R.id.buttonClick);
next = (Button) findViewById(R.id.next);
buttonClick.setOnClickListener( new OnClickListener() {
public void onClick(View v) {

preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback);

try{

Constants.takepic=1;

buttonClick.setEnabled(false); //once click is clicked, its disable
}
catch(Exception e)
{
e.printStackTrace();
}
}


});
next.setOnClickListener( new OnClickListener() {
public void onClick(View v) {
//preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback);
if(Constants.takepic==1)
{
Intent intent_new=new Intent(CameraDemo.this,NotesAndUpload.class);
startActivity(intent_new);
}
else
{
Toast.makeText(CameraDemo.this, "Take a picture",5);
}

}


});

Log.d(TAG, "onCreate'd");
}
catch(Exception e ){}
}


ShutterCallback shutterCallback = new ShutterCallback() {
public void onShutter() {
Log.d(TAG, "onShutter'd");
}
};

/** Handles data for raw picture */
PictureCallback rawCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
Log.d(TAG, "onPictureTaken - raw");
}
};

/** Handles data for jpeg picture */
PictureCallback jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
//taking time and date
Constants.dateValue=dateAndTime("yyyy-MM-dd");
Constants.timeValue=dateAndTime("HH:mm:ss");
FileOutputStream outStream = null;
try {
// write to local sandbox file system
// outStream =
CameraDemo.this.openFileOutput(String.format("%d.j pg",
System.currentTimeMillis()), 0);
// Or write to sdcard
long imageNameLong=System.currentTimeMillis();
Constants.imageName=new Long(imageNameLong).toString();
outStream = new
FileOutputStream(String.format("/sdcard/%d.jpg",imageNameLong));
outStream.write(data);
Constants.takepic=1;
outStream.close();

Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Log.d(TAG, "onPictureTaken - jpeg");
}
};

}


//Preview Class
class Preview extends SurfaceView implements SurfaceHolder.Callback {
private static final String TAG = "Preview";

SurfaceHolder mHolder;
public Camera camera;

Preview(Context context) {
super(context);

// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BU FFERS);
}

public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, acquire the camera and tell it where
// to draw.
camera = Camera.open();
try {
camera.setPreviewDisplay(holder);


camera.setPreviewCallback(new PreviewCallback() {

public void onPreviewFrame(byte[] data, Camera arg1) {
/*FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg",
System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d(TAG, "onPreviewFrame - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}*/
Preview.this.invalidate();
}
});
} catch (IOException e) {
e.printStackTrace();
}
}

public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
// Because the CameraDevice object is not a shared resource, it's very
// important to release it when the activity is paused.
camera.stopPreview();
camera = null;
}

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 NEED TO BE CHANGED :-
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewSize(w, h);
if(getResources().getConfiguration().orientation ==
Configuration.ORIENTATION_PORTRAIT)
{
parameters.set("rotation",90);
parameters.set("orientation", "portrait");
}
if (getResources().getConfiguration().orientation ==
Configuration.ORIENTATION_LANDSCAPE)
{
parameters.set("rotation", 90);
parameters.set("orientation", "landscape");

}
parameters.set("jpeg-quality", 50);
camera.setParameters(parameters);
camera.startPreview();
}

@Override
public void draw(Canvas canvas) {
super.draw(canvas);
Paint p= new Paint(Color.RED);
Log.d(TAG,"draw");
canvas.drawText("PREVIEW", canvas.getWidth()/2, canvas.getHeight()/2, p );
}
}

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