好吧，这次我又更新了我的问题。

我已经在 Galaxy Nexus(JB)、Moto-XX(GB)、SAMSUNG(Froyo) 上一一测试了以下代码，出现了不同的问题/异常。

public class MainActivity extends Activity {
    @SuppressLint("NewApi")
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

          ShutterCallback shutterCallback = new ShutterCallback() {
           public void onShutter() {
                  System.out.println("shutterCallback");
           }
          };

          PictureCallback rawCallback = new PictureCallback() {
           public void onPictureTaken(byte[] data, Camera camera) {
                  System.out.println("onPictureTaken");
           }
          };

          PictureCallback jpegCallback = new PictureCallback() {
           public void onPictureTaken(byte[] data, Camera camera) {
                  System.out.println("jpegCallback");
                  FileOutputStream outStream = null;
                  try {
                  System.out.println("jpegCallback begin");
                     camera.startPreview();
                     File storagePath =  new File("/mnt/sdcard/");
                     File myImage = new File(storagePath, "example2.jpg");
                     outStream = new FileOutputStream(myImage); 
                     outStream.write(data);
                     outStream.close();
                    } catch (FileNotFoundException e) {
                          System.out.println("jpegCallback FileNotFoundException");
                     e.printStackTrace();
                    } catch (IOException e) {
                          System.out.println("jpegCallback IOException");
                     e.printStackTrace();
                    } finally {
                     camera.stopPreview();
                     camera.release();
                    }
            }
          };

          if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
              for (int i = 0; i < Camera.getNumberOfCameras(); i++) {
              Camera.CameraInfo info = new Camera.CameraInfo();
              Camera.getCameraInfo(i, info);
              if (info.facing == Camera.CameraInfo.CAMERA_FACING_BACK) {
                     try{
                             Camera camera = Camera.open(i);
                             Camera.Parameters parameters = camera.getParameters();
                             camera.setParameters(parameters);
                              camera.startPreview();
                             camera.setPreviewDisplay(null);
                              System.out.println("takePicture ahead");
                             camera.takePicture(null, rawCallback, jpegCallback);
                              System.out.println("takePicture finish");
                            }
                            catch (Exception e){
                                  System.out.println("printStackTrace");
                                     e.printStackTrace();
                            }
                    }
                }
            }  
    }

具体问题有:

在Android4.1&4.2中，异常分为三部分:
1.由“Camera camera = Camera.open(i);”引起

11-26 00:36:29.144: D/DOMX(132): ERROR: failed check:status >= 0 - returning error: 0x81000 - Can't connect
11-26 00:36:29.144: D/DOMX(132): ERROR: failed check:eRPCError == RPC_OMX_ErrorNone - returning error: 0x80001001 - Error initializing RPC
11-26 00:36:29.144: D/DOMX(132): ERROR: failed check:hRPCCtx != NULL - returning error: 0x81001 - NULL context handle supplied to RPC Deinit
11-26 00:36:29.144: D/DOMX(132): ERROR: rror in Initializing Proxy
11-26 00:36:29.144: E/CameraHAL(132): OMX_GetHandle() failed, error: 0x80001001

2.由“camera.startPreview();”引起

11-26 00:36:30.488: D/DOMX(132): ERROR: failed check:(eError == OMX_ErrorNone) || (eError == OMX_ErrorNoMore) - returning error: 0x80001005 - Error returned from OMX API in ducati
11-26 00:36:30.488: E/CameraHAL(132): Error while configuring rotation 0x80001005

3.由“camera.takePicture()”引起

11-26 00:36:30.495: E/CameraHAL(132): Adapter state switch INTIALIZED_STATE Invalid Op! event = 0x13
11-26 00:36:30.738: D/DOMX(132): ERROR: failed check:(eError == OMX_ErrorNone) || (eError == OMX_ErrorNoMore) - returning error: 0x80001005 - Error returned from OMX API in ducati
11-26 00:36:30.738: E/CameraHAL(132): Exiting function UseBuffersCapture because of ret 0 eError=80001005

因此，结果是照片没有在 Jelly Bean 中拍摄，即使是在像 Galaxy Nexus i9250 这样的普通设备中也是如此。

接下来，在Android2.3中，异常有两部分:
1.由“Camera camera = Camera.open(i);”引起

E/CameraSettings(1235): Param type 53 not supported        
E/CameraSettings(1235): Param type 51 not supported        
E/CameraSettings(1235): Param type 50 not supported  

2.尽管如此，camera.takePicture() 仍然可以执行。结果显示照片已拍摄。除了一个问题:“E/MemoryHeapBase(1235): mmap(fd=50, size=0) failed (Invalid argument)”

11-26 01:28:33.835: I/AwesomePlayer(1235): prepareAsync_l
11-26 01:28:33.835: D/CameraHal(1235): Capture size 2048x1536, res enum 3
11-26 01:28:33.835: I/AwesomePlayer(1235): prepareAsync_l
11-26 01:28:33.835: D/CameraHal(1235): Setting capture format 0 header 2
11-26 01:28:33.835: I/HPAndroidHAL(1235): APILOG: SetCaptureDataFormat (1 2 0)
11-26 01:28:33.835: D/CameraHal(1235): Thumbnail enabled
11-26 01:28:33.843: E/MemoryHeapBase(1235): mmap(fd=50, size=0) failed (Invalid argument)
11-26 01:28:33.843: D/CameraHal(1235): Initializing capture memory raw: 0x42ee6000 (6295552), jpg: 0x434e7000 (3147776), pv 0xffffffff (0)
11-26 01:28:33.843: I/HPAndroidHAL(1235): APILOG: InitializeCaptureMemory(3 3147776 0x434e7000 6295552 0x42ee6000 0 0xffffffff)
11-26 01:28:33.843: I/HPAndroidHAL(1235): APILOG: InitializeCaptureMemoryBuffers(3 1 0_0x42de5d9c 6295552_0x42de5dc0 3147776_0x42de5d94 0_0x42de5dc8)
11-26 01:28:33.843: I/HPAndroidHAL(1235): APILOG: SetCaptureS2 with finish3A = 1
11-26 01:28:33.843: I/VorbisDecoder(1235): mNumChannels=1, mSampleRate=44100
11-26 01:28:33.843: E/OMXCodec(1235): Successfully allocated software codec 'VorbisDecoder'
11-26 01:28:33.843: I/VorbisDecoder(1235): mNumChannels=1, mSampleRate=44100
11-26 01:28:33.843: E/OMXCodec(1235): Successfully allocated software codec 'VorbisDecoder'
11-26 01:28:33.851: I/AwesomePlayer(1235): play_l
11-26 01:28:33.851: I/AwesomePlayer(1235): play_l
11-26 01:28:33.874: I/AwesomePlayer(1235): pause_l 1
11-26 01:28:33.874: I/AwesomePlayer(1235): reset_l
11-26 01:28:33.874: I/ExtendFileSource(1235): release pFilename = 0xfb690
11-26 01:28:33.874: I/AwesomePlayer(1235): reset_l
11-26 01:28:33.874: I/AwesomePlayer(1235): reset_l
11-26 01:28:33.882: I/AwesomePlayer(1235): pause_l 1
11-26 01:28:33.882: I/AwesomePlayer(1235): reset_l
11-26 01:28:33.882: I/ExtendFileSource(1235): release pFilename = 0xf9098
11-26 01:28:33.882: I/AwesomePlayer(1235): reset_l
11-26 01:28:33.882: I/AwesomePlayer(1235): reset_l

因此，在Android2.3中，shutterCallback、rawCallback、jpegCallback都不会在拍照后被调用。

之后，在Android2.2中，shutterCallback和rawCallback在拍照后调用。但是他们都不能给我提供数据(字节流)。如 http://developer.android.com/reference/android/hardware/Camera.html#takePicture(android.hardware.Camera.ShutterCallback, android.hardware.Camera.PictureCallback, android.hardware.Camera.PictureCallback) 中所述 ，如果没有可用的原始图像回调缓冲区或原始图像回调缓冲区不够大，无法容纳原始图像，则数据将为空。我确实在 rawCallback 中得到空数据。

这都是硬件不兼容造成的还是代码有问题？
请帮忙

最佳答案

希望你现在已经解决了你的问题，但我认为你遇到的问题是你将相机预览设置为空，它需要一个有效的 SurfaceView 作为预览打开闪光灯(至少在 Galaxy Nexus 和其他一些三星设备上...)

罪魁祸首:

 camera.setPreviewDisplay(null);

可能的解决方案:

将 SurfaceView 添加到您的布局并将其大小指定为 1px x 1px。看起来它必须至少有那么大(0 的大小给出不同的错误)。将 SurfaceView 关闭屏幕(滚动关闭或 RelativeLayout 或其他东西)可能会奏效

关于android - camera.takePicture() 在我的 JB & GB & Froyo 手机上不工作，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13546788/