我正在尝试通过我的APP拍照，但在某些设备上拍照却失败了一些设备。 我很确定我做得对，但android不接受setParameters。这真的很烦人，不确定为什么在Android平台上开发一些东西太难了。在公司我们正在构建每个应用程序的Android和iPhone版本，但iPhone团队总是在Android之前最多3周完成项目。 我尝试了很多代码，我找到了SOF或其他来源但没有正常工作。
无论如何，这是我拍照的代码
public class TakePicturePortrait extends Activity
{
private int screenW;
private int screenH;
@Override
public void onCreate(Bundle b)
{
super.onCreate(b);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_fullscreen);
// Get Screen dimention first.
getScreenSize();
picture_guide_layout = (RelativeLayout) findViewById(R.id.picture_guide_layout);
mySurfaceView = (SurfaceView) findViewById(R.id.surface_view);
holder = mySurfaceView.getHolder();
holder.addCallback(mSurfaceListener);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
protected void onResume()
{
if (myCamera == null)
myCamera = getCameraInstance();
super.onResume();
}
@Override
public void onPause()
{
super.onPause();
releaseCamera();
}
private void releaseCamera()
{
if (myCamera != null)
{
myCamera.setPreviewCallback(null);
myCamera.release();
myCamera = null;
}
}
private static Camera getCameraInstance()
{
Camera c = null;
try
{
c = Camera.open();
}
catch (Exception e)
{
System.out.println(e.toString());
}
return c;
}
private final ShutterCallback shutterCallback = new ShutterCallback()
{
public void onShutter()
{
AudioManager mgr = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mgr.playSoundEffect(AudioManager.FLAG_PLAY_SOUND);
}
};
private SurfaceHolder.Callback mSurfaceListener = new SurfaceHolder.Callback()
{
public void surfaceCreated(SurfaceHolder holder)
{
try
{
myCamera.setPreviewDisplay(holder);
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void surfaceDestroyed(SurfaceHolder holder)
{
}
@SuppressLint("InlinedApi")
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
Parameters mParam = myCamera.getParameters();
int w = 0;
int h = 0;
List<Size> getPictureSize = mParam.getSupportedPictureSizes();
for(Size s: getPictureSize)
{
if(s.width < 1280)
break;
w = s.width;
h = s.height;
}
mParam.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
mParam.setPictureFormat(ImageFormat.JPEG);
mParam.setJpegQuality(90);
mParam.setPictureSize(w, h);
mParam.setRotation(fixPictureOrientation());
myCamera.stopPreview();
myCamera.setParameters(mParam);
Display display = getWindowManager().getDefaultDisplay();
if (display.getRotation() == Surface.ROTATION_0)
myCamera.setDisplayOrientation(90);
}
};
private int fixPictureOrientation()
{
Camera.CameraInfo info = new Camera.CameraInfo();
Camera.getCameraInfo(Camera.CameraInfo.CAMERA_FACING_BACK, info);
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int degrees = 0;
switch (rotation)
{
case Surface.ROTATION_0 :
degrees = 0;
break; // Natural orientation
case Surface.ROTATION_90 :
degrees = 90;
break; // Landscape left
case Surface.ROTATION_180 :
degrees = 180;
break;// Upside down
case Surface.ROTATION_270 :
degrees = 270;
break;// Landscape right
}
int rotate = (info.orientation - degrees + 360) % 360;
return rotate;
}
private PictureCallback mPictureListener = new PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
data = getRotatedData(data);
String fileName = (System.currentTimeMillis() / 1000) + ".jpg";
try
{
File file = new File(PATH + "/" + fileName);
FileOutputStream out = new FileOutputStream(file);
out.write(data);
if (out != null)
out.close();
}
catch (Exception e)
{
}
myCamera.stopPreview();
}
};
public void takePicture(View v)
{
if (myCamera != null)
myCamera.takePicture(shutterCallback, null, mPictureListener);
}
private void getScreenSize()
{
screenW = getResources().getDisplayMetrics().widthPixels;
screenH = getResources().getDisplayMetrics().heightPixels;
}
private byte[] getRotatedData(byte[] data)
{
byte[] rotatedData = data;
Bitmap originalBmp = BitmapFactory.decodeByteArray(data, 0, data.length, null);
int originalW = originalBmp.getWidth();
int originalH = originalBmp.getHeight();
Matrix mat = new Matrix();
mat.postRotate(0);
Bitmap rotetedBmp = Bitmap.createBitmap(originalBmp, 0, 0, originalW, originalH, mat, true);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
rotetedBmp.compress(CompressFormat.JPEG, 90, bos);
try
{
bos.flush();
}
catch (IOException e1)
{
e1.printStackTrace();
}
rotatedData = bos.toByteArray();
try
{
bos.close();
}
catch (IOException e1)
{
e1.printStackTrace();
}
return rotatedData;
}
}
在这个代码完美地工作三星S3，但在三星S4失败。 LogCat说问题是myCamera.setParameters（mParam）;
这是ErrLog输出
11-25 10:01:40.737: E/AndroidRuntime(4257): FATAL EXCEPTION: main
11-25 10:01:40.737: E/AndroidRuntime(4257): java.lang.RuntimeException: setParameters failed
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.hardware.Camera.native_setParameters(Native Method)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.hardware.Camera.setParameters(Camera.java:1003)
11-25 10:01:40.737: E/AndroidRuntime(4257): at main_app.TakePictureLandscape$2.surfaceChanged(TakePictureLandscape.java:284)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.SurfaceView.updateWindow(SurfaceView.java:619)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:398)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.drawChild(ViewGroup.java:1669)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1398)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.drawChild(ViewGroup.java:1669)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1398)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.View.draw(View.java:6883)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.widget.FrameLayout.draw(FrameLayout.java:357)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.drawChild(ViewGroup.java:1671)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1398)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.View.draw(View.java:6883)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.widget.FrameLayout.draw(FrameLayout.java:357)
11-25 10:01:40.737: E/AndroidRuntime(4257): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2371)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewRoot.draw(ViewRoot.java:1531)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewRoot.performTraversals(ViewRoot.java:1261)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.view.ViewRoot.handleMessage(ViewRoot.java:1868)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.os.Handler.dispatchMessage(Handler.java:99)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.os.Looper.loop(Looper.java:130)
11-25 10:01:40.737: E/AndroidRuntime(4257): at android.app.ActivityThread.main(ActivityThread.java:3705)
11-25 10:01:40.737: E/AndroidRuntime(4257): at java.lang.reflect.Method.invokeNative(Native Method)
11-25 10:01:40.737: E/AndroidRuntime(4257): at java.lang.reflect.Method.invoke(Method.java:507)
11-25 10:01:40.737: E/AndroidRuntime(4257): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-25 10:01:40.737: E/AndroidRuntime(4257): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-25 10:01:40.737: E/AndroidRuntime(4257): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
相机应用程序总是很烦人，因为它真的取决于每个硬件。所以，我认为这篇文章的问题
mParam.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
mParam.setPictureFormat(ImageFormat.JPEG);
mParam.setJpegQuality(90);
mParam.setPictureSize(w, h);
mParam.setRotation(fixPictureOrientation());
例如，如果设备不支持对焦模式图片，那么setFocusMode（）会使setParameter失败。因此，请确保设备在setParameter之前支持它，
那样：if(focusModes.contains(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO)) { //set }
尝试评论并运行上面的每一行，看看哪条线路出问题。