java - 安卓拍照失败

Question

我一直在尝试为 android 制作一个相机应用程序，但是当我尝试拍照时，它出现错误，我不得不强行关闭。LogCat 是:

    07-14 12:41:25.195: D/dalvikvm(13549): GC_EXPLICIT freed 51K, 49% free 2694K/5187K, external 3474K/4422K, paused 26ms
    07-14 12:41:25.195: D/AndroidRuntime(13549): Shutting down VM
    07-14 12:41:25.195: W/dalvikvm(13549): threadid=1: thread exiting with uncaught exception (group=0x4001e560)
    07-14 12:41:25.226: E/AndroidRuntime(13549): FATAL EXCEPTION: main
    07-14 12:41:25.226: E/AndroidRuntime(13549): java.lang.RuntimeException: takePicture failed 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.hardware.Camera.native_takePicture(Native Method)
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.hardware.Camera.takePicture(Camera.java:829) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.hardware.Camera.takePicture(Camera.java:793) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at com.mvitsor.camerax.cameraMainActivity.takepic(cameraMainActivity.java:53) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at com.mvitsor.camerax.cameraMainActivity$5.onClick(cameraMainActivity.java:44) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.view.View.performClick(View.java:2485) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.view.View$PerformClick.run(View.java:9089) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.os.Handler.handleCallback(Handler.java:587) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.os.Handler.dispatchMessage(Handler.java:92) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.os.Looper.loop(Looper.java:130) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at android.app.ActivityThread.main(ActivityThread.java:3859) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at java.lang.reflect.Method.invokeNative(Native Method) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at java.lang.reflect.Method.invoke(Method.java:507) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:840) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:598) 
    07-14 12:41:25.226: E/AndroidRuntime(13549):    at dalvik.system.NativeStart.main(Native Method) 

代码如下:

    package com.mvitsor.camerax;

    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;

    import android.app.Activity;
    import android.content.pm.ActivityInfo;
    import android.graphics.PixelFormat;
    import android.hardware.Camera;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.SurfaceHolder;
    import android.view.SurfaceView;
    import android.view.View;
    import android.widget.ImageButton;
    import android.widget.Toast;

    public class cameraMainActivity extends Activity {
        /** Called when the activity is first created. */
        Camera camera;
        SurfaceView preview;
        SurfaceHolder previewHolder;
        ImageButton takePic;

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            setContentView(R.layout.main_camera_layout);

            preview = (SurfaceView) findViewById(R.id.SVpreview);
            previewHolder = preview.getHolder();
            previewHolder.addCallback(surfaceCallback);
            previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
            takePic = (ImageButton) findViewById(R.id.btn_take_pic);

            takePic.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    takepic();              
                }
            });
        }

        public void takepic(){
            camera.stopPreview();
            System.gc();
            camera.takePicture(null, null, photoCallback);
            //camera.takePicture(ShutterCallback, rawCallback, photoCallback);
        }

        private Camera.Size getBestPreviewSize(int width, int height,
                Camera.Parameters parameters) {
            Camera.Size result = null;

            for (Camera.Size size : parameters.getSupportedPreviewSizes()) {
                if (size.width <= width && size.height <= height) {
                    if (result == null) {
                        result = size;
                    } else {
                        int resultArea = result.width * result.height;
                        int newArea = size.width * size.height;

                        if (newArea > resultArea) {
                            result = size;
                        }
                    }
                }
            }

            return (result);
        }

        SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {

            @Override
            public void surfaceCreated(SurfaceHolder holder) {
                camera = Camera.open();

                try {
                    camera.setPreviewDisplay(previewHolder);
                } catch (Throwable t) {
                    Toast toast = Toast.makeText(cameraMainActivity.this,
                            "Exception in setPreviewDisplay", Toast.LENGTH_LONG);
                    toast.show();
                }
            }

            @Override
            public void surfaceChanged(SurfaceHolder holder, int format, int width,
                    int height) {
                Camera.Parameters parameters = camera.getParameters();

                Camera.Size bestSize = getBestPreviewSize(width, height, parameters);
                parameters.setPreviewSize(bestSize.width, bestSize.height);

                parameters.setPictureFormat(PixelFormat.JPEG);
                camera.setParameters(parameters);
                camera.startPreview();
            }

            @Override
            public void surfaceDestroyed(SurfaceHolder holder) {
                camera.stopPreview();
                camera.release();
                camera = null;
            }

        };

        /*
        Camera.ShutterCallback ShutterCallback = new Camera.ShutterCallback() {
            public void onShutter() {
            }
        };

        PictureCallback rawCallback = new PictureCallback() {
            public void onPictureTaken(byte[] data, Camera camera) {
            }
        };
        */

        Camera.PictureCallback photoCallback = new Camera.PictureCallback() {
            public void onPictureTaken(byte[] data, Camera camera) {
                // Save the image JPEG data to the SD card
                FileOutputStream outStream = null;
                try {
                  outStream = new FileOutputStream("/sdcard/test.jpg");
                  outStream.write(data);
                  outStream.close();
                } catch (FileNotFoundException e) {
                  Log.d("CAMERA", e.getMessage());
                } catch (IOException e) {
                  Log.d("CAMERA", e.getMessage());
                }
                camera.startPreview();
                /*new SavePhotoTask().execute(data);
                camera.startPreview();*/
            }
        };
    }

我已经尝试了 camera.takePicture(null, null, photoCallback); 和 camera.takePicture(ShutterCallback, rawCallback, photoCallback);，如您所见，我还在某处读到 System.gc(); 可以工作，但没有。另外，我读到一个常见的问题是拍照后忘记重新启动预览，但我在调用 camera.startPreview(); 之后，所以我真的不知道发生了什么!

我运行的是 Android 2.3.3 (Motorola Razr)。 (看起来很多人在 Android 2.3.3 上遇到相机问题...)。

如果有人能提供帮助，我将不胜感激!

维托马尔特斯特恩利希特

I'VE UPLOADED THE WHOLE PROJECT TO http://www.4shared.com/rar/meSWrQPm/CameraTest.html

我下载了一个显示此日志的应用程序...也许这里有什么可以提供帮助:问题似乎是在创建文件目录时出现的。我该如何解决这个问题？

    07-15 12:43:36.578 27203 27487 W ActivityManager:   Force finishing activity com.mvitsor.camerax/.cameraMainActivity
    07-15 12:43:36.601 27203 27221 W ApplicationContext: Unable to create files directory

这是完整的日志

    07-15 13:09:08.226 27203 27582 W ActivityManager:   Force finishing activity com.mvitsor.camerax/.cameraMainActivity
    07-15 12:43:36.601 27203 27221 W ApplicationContext: Unable to create files directory
    07-15 13:09:08.414 27203 27221 I ActivityManager: Config changed: { scale=1.0 imsi=724/10 loc=pt_BR touch=3 keys=1/1/2 nav=1/1 orien=1 layout=268435490 uiMode=17 seq=139}
    07-15 13:09:08.726 27203 27219 W ActivityManager: Activity pause timeout for HistoryRecord{40562350 com.mvitsor.camerax/.cameraMainActivity}
    07-15 13:09:09.132 27203 27219 I ActivityManager: No longer want android.process.media (pid 11091): hidden #21
    07-15 13:09:09.515 27203 27488 I WindowManager: WIN DEATH: Window{40d859a8 com.mvitsor.camerax/com.mvitsor.camerax.cameraMainActivity paused=false}
    07-15 13:09:09.515 27203 27499 I ActivityManager: Process com.mvitsor.camerax (pid 11848) has died.
    07-15 13:09:09.515 27203 27426 I WindowManager: WIN DEATH: Window{40ef8c70 SurfaceView paused=false}
    07-15 13:09:09.539 27203 27210 I MotOverlay: disable_streaming_locked
    07-15 13:09:09.539 27203 27210 I MotOverlay: Destroying overlay/fd=300/obj=4650c000
    07-15 13:09:09.539 27498 24620 D IMirrorIpc: onTransact (2)
    07-15 13:09:09.539 27498 24620 D MirrorIpc: unregisterCallback: client 0
    07-15 13:09:09.539 27498 24620 D MirrorUCMgrIpcCB: ipcInit - Client already exists
    07-15 13:09:09.539 27498 24620 D MirrorEngine: hdmiMirrorActiveOverlay/0
    07-15 13:09:09.539 27174 11890 D OverlayDisplayAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OverlayDisplayAdapter.cpp:714 processHalMsg - Display thread received DISPLAY_EXIT command from Camera HAL.
    07-15 13:09:09.539 27174 11890 D OverlayDisplayAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OverlayDisplayAdapter.cpp:715 processHalMsg - Stopping display thread...
    07-15 13:09:09.539 27174 11890 D OverlayDisplayAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OverlayDisplayAdapter.cpp:735 processHalMsg - +Signalling display semaphore
    07-15 13:09:09.539 27174 11890 D OverlayDisplayAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OverlayDisplayAdapter.cpp:740 processHalMsg - -Signalling display semaphore
    07-15 13:09:09.539 27174 27672 E CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:1517 stop - AppCallbackNotifier already in stopped state
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:161 notificationThread - Notification Thread received message from Camera HAL
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:848 processMessage - +Msg get...
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:850 processMessage - -Msg get...
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:869 processMessage - Received NOTIFIER_EXIT command from Camera HAL
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:880 processMessage - +Signalling semaphore from CameraHAL..
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:883 processMessage - -Signalling semaphore from CameraHAL..
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:165 notificationThread - Notification Thread exiting.
    07-15 13:09:09.539 27174 11876 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:190 notificationThread - Notification Thread exited.
    07-15 13:09:09.539 27174 27672 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:938 ~AppCallbackNotifier - Stopping Event Provider
    07-15 13:09:09.539 27174 27672 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/AppCallbackNotifier.cpp:946 ~AppCallbackNotifier - Stopping Frame Provider
    07-15 13:09:09.539 27174 27672 D CameraHal: hardware/ti/omap4/omap3/camera-omap4/src/BaseCameraAdapter.cpp:476 sendCommand - Set time out
    07-15 13:09:09.539 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.539 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.539 27174 27672 D OMXCameraAdapter: **** ~OMXCameraAdapter called() ! ****
    07-15 13:09:09.539 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.585 27174 27672 E DOMX_RPC: Closing IPC
    07-15 13:09:09.585 27174 11875 D OMXCameraAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OMXCameraAdapter/OMXCameraAdapter.cpp:9462 Handler - msg.command = -1
    07-15 13:09:09.585 27174 11875 E OMXCameraAdapter: hardware/ti/omap4/omap3/camera-omap4/src/OMXCameraAdapter/OMXCameraAdapter.cpp:9476 Handler - Exiting command handler
    07-15 13:09:09.585 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.585 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.585 27174 27672 D OMXCameraAdapter: **** ~OMXCameraAdapter exiting ! ****
    07-15 13:09:09.585 27174 27672 D OMXCameraAdapter: 
    07-15 13:09:09.601 27174 27672 D CameraHal: 
    07-15 13:09:09.601 27174 27672 D CameraHal: 
    07-15 13:09:09.601 27174 27672 D CameraHal: **** ~CameraHal() ****
    07-15 13:09:09.601 27174 27672 D CameraHal: 
    07-15 13:09:09.601 27174 27672 D CameraHal: 
    07-15 13:09:11.523 27203 27552 I ActivityManager: Starting: Intent { act=android.intent.action.MAIN flg=0x10500000 cmp=de.softxperience.android.nedebug/.LogcatActivity } from pid 27542

Answer 1

尝试添加以下权限，因为在捕获时不允许存储图像...

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />