Android: "Camera.takePicture failed" Ngoại lệ

Question

Tôi đang gặp phải sự cố lạ. Tôi đang thử nghiệm trên HTC EVO. Tôi đã viết một ứng dụng máy ảnh demo nhắm mục tiêu 2.2 và hầu hết mọi thứ hoạt động chính xác. Vấn đề là sau khi uống ba hoặc bốn hình ảnh, các ứng dụng bị treo và mang lại cho tôi thông báo sau:

D/QualcommCameraHardware( 64): takePicture(479) 
D/QualcommCameraHardware( 64): val_ril_status = 0,val_wimax_status = 0,val_hotspot_status = 0,val_low_temp_limit = 10.000000,val_batt_temp = 29.799999,val_low_temp_limit = 15,val_batt_cap = 96 
D/QualcommCameraHardware( 64): FLASHLIGHT is ENABLED 
D/QualcommCameraHardware( 64): stopPreviewInternal E: 1 
D/QualcommCameraHardware( 64): cancelAutoFocusInternal E 
D/QualcommCameraHardware( 64): cancelAutoFocusInternal X: 0 
I/QualcommCameraHardware( 64): deinitPreview E 
D/QualcommCameraHardware( 64): launch_watchdog_thread: 
D/QualcommCameraHardware( 64): watchdog_thread_id = 369048 
I/QualcommCameraHardware( 64): register_buf: camfd = 35, reg = 1 buffer = 0x4153f000 
I/QualcommCameraHardware( 64): register_buf: camfd = 35, reg = 1 buffer = 0x415bf000 
I/QualcommCameraHardware( 64): register_buf: camfd = 35, reg = 1 buffer = 0x4163f000 
I/QualcommCameraHardware( 64): register_buf: camfd = 35, reg = 1 buffer = 0x416bf000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x4331d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x4351d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x4371d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x4391d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x43b1d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x43d1d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x43f1d000 
I/QualcommCameraHardware( 64): register_buf: camfd = 38, reg = 1 buffer = 0x4411d000 
I/QualcommCameraHardware( 64): deinitPreview X 
D/QualcommCameraHardware( 64): stopPreviewInternal X: 0 
D/QualcommCameraHardware( 64): initRaw E: raw size=3264x2448 
D/QualcommCameraHardware( 64): initRaw: raw ration = 0.750000, display size=768x432 
D/QualcommCameraHardware( 64): initRaw: thumbnail_width=768, thumbnail_height=576, thumbnail_buffer_size=663552 
D/QualcommCameraHardware( 64): native_access_parm: fd 24, type 1, length 32 
D/mm-camera-ov8810_u( 64): andy cam_mode_sel 0 
D/QualcommCameraHardware( 64): initRaw: initializing mRawHeap. 
E/MemoryHeapBase( 64): error opening /dev/pmem_camera: No such file or directory 
E/QualcommCameraHardware( 64): failed to construct master heap for pmem pool /dev/pmem_camera 
E/QualcommCameraHardware( 64): initRaw X failed with pmem_camera, trying with pmem_adsp 
D/QualcommCameraHardware( 64): frame_thread X 
D/QualcommCameraHardware( 64): watchdog_thread_id = 369048 
D/QualcommCameraHardware( 64): release_watchdog_thread: frame_thread_released = 1 
E/MemoryHeapBase( 64): mmap(fd=38, size=11988992) failed (Invalid argument) 
E/QualcommCameraHardware( 64): failed to construct master heap for pmem pool /dev/pmem_adsp 
E/QualcommCameraHardware( 64): initRaw X: error initializing mRawHeap 
E/QualcommCameraHardware( 64): initRaw failed. Not taking picture. 
D/AndroidRuntime(2650): Shutting down VM 
W/dalvikvm(2650): threadid=1: thread exiting with uncaught exception (group=0x400259f8) 
E/AndroidRuntime(2650): FATAL EXCEPTION: main 
E/AndroidRuntime(2650): java.lang.RuntimeException: takePicture failed 
E/AndroidRuntime(2650): at android.hardware.Camera.native_takePicture(Native Method) 
E/AndroidRuntime(2650): at android.hardware.Camera.takePicture(Camera.java:535) 
E/AndroidRuntime(2650): at android.hardware.Camera.takePicture(Camera.java:503) 
E/AndroidRuntime(2650): at spikes.cameraSpike03.MainActivity.takePicture(MainActivity.java:90) 
E/AndroidRuntime(2650): at spikes.cameraSpike03.MainActivity.access$3(MainActivity.java:87) 
E/AndroidRuntime(2650): at spikes.cameraSpike03.MainActivity$3.onClick(MainActivity.java:80) 
E/AndroidRuntime(2650): at android.view.View.performClick(View.java:2408) 
E/AndroidRuntime(2650): at android.view.View$PerformClick.run(View.java:8817) 
E/AndroidRuntime(2650): at android.os.Handler.handleCallback(Handler.java:587) 
E/AndroidRuntime(2650): at android.os.Handler.dispatchMessage(Handler.java:92) 
E/AndroidRuntime(2650): at android.os.Looper.loop(Looper.java:144) 
E/AndroidRuntime(2650): at android.app.ActivityThread.main(ActivityThread.java:4937) 
E/AndroidRuntime(2650): at java.lang.reflect.Method.invokeNative(Native Method) 
E/AndroidRuntime(2650): at java.lang.reflect.Method.invoke(Method.java:521) 
E/AndroidRuntime(2650): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
E/AndroidRuntime(2650): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
E/AndroidRuntime(2650): at dalvik.system.NativeStart.main(Native Method) 
W/ActivityManager( 107): Force finishing activity spikes.cameraSpike03/.MainActivity 
D/QualcommCameraHardware( 64): void* watchdog(void*), frame_thread_released = 1, cnt = 0 
D/QualcommCameraHardware( 64): void* watchdog(void*), exit, frame_thread_released=1 
D/QualcommCameraHardware( 64): void release_watchdog_thread(): pthread_join succeeded on watchdog. 

này có thể là một vấn đề quản lý bộ nhớ?

Dưới đây là tất cả mã tôi đang sử dụng.

[AndroidManifest.xml]

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="spikes.cameraSpike03" 
     android:versionCode="1" 
     android:versionName="1.0"> 
    <application android:icon="@drawable/icon" android:label="@string/app_name" android:debuggable="true"> 
     <activity android:name=".MainActivity" android:label="@string/app_name" android:screenOrientation="portrait"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
    </application> 

    <uses-sdk android:minSdkVersion="8" /> 

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

<uses-feature android:name="android.hardware.camera" /> 
<uses-feature android:name="android.hardware.camera.autofocus" /> 
<uses-feature android:name="android.hardware.camera.flash" /> 
</manifest> 

[main.xml]

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> 
<SurfaceView android:id="@+id/svCameraView" android:layout_width="fill_parent" android:layout_height="fill_parent" /> 
<LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:background="#3000" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:gravity="center_horizontal"> 
    <Button android:id="@+id/btnCapture" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="capture" /> 
    <CheckBox android:id="@+id/chkAutofocus" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Autofocus" /> 
</LinearLayout> 
</RelativeLayout> 

[MainActivity.java]

package spikes.cameraSpike03; 

import java.util.List; 

import android.app.Activity; 
import android.content.pm.ActivityInfo; 
import android.content.res.Configuration; 
import android.graphics.PixelFormat; 
import android.hardware.Camera; 
import android.hardware.Camera.AutoFocusCallback; 
import android.hardware.Camera.Parameters; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.hardware.Camera.Size; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.view.View; 
import android.view.Window; 
import android.view.WindowManager; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.CheckBox; 

public class MainActivity extends Activity implements SurfaceHolder.Callback { 
private static final String LOG_TAG = MainActivity.class.getName(); 
private static final String LOG_LINE = "---------------------------------"; 

private Camera _camera; 
private boolean _previewIsRunning = false; 

private SurfaceView _svCameraView; 
private SurfaceHolder _surfaceHolder; 
private Button _btnCapture; 
private CheckBox _chkAutofocus; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     getWindow().setFormat(PixelFormat.TRANSLUCENT); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 
     getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 

     setContentView(R.layout.main); 

     _svCameraView = (SurfaceView)findViewById(R.id.svCameraView); 

     _surfaceHolder = _svCameraView.getHolder(); 
     _surfaceHolder.addCallback(this); 
     _surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 

     _chkAutofocus = (CheckBox)findViewById(R.id.chkAutofocus); 

     _btnCapture = (Button)findViewById(R.id.btnCapture); 
     _btnCapture.setOnClickListener(new OnClickListener() { 
    @Override 
    public void onClick(View v) { 
    if(_camera != null){ 
    //Decide whether or not to use autofocus 
    if(_chkAutofocus.isChecked()){ 
     Log.d(LOG_TAG, LOG_LINE + "Preparing to take the picture using autofocus..."); 

     _camera.autoFocus(new AutoFocusCallback() { 
     @Override 
     public void onAutoFocus(boolean success, Camera camera) { 
     Log.d(LOG_TAG, LOG_LINE + "_camera.autoFocus.onAutoFocus(...) entered."); 

     takePicture(); 

     Log.d(LOG_TAG, LOG_LINE + "_camera.autoFocus.onAutoFocus(...) finished."); 
     } 
     }); 
    } 
    else{ 
     Log.d(LOG_TAG, LOG_LINE + "Preparing to take the picture without autofocus..."); 

     takePicture(); 
    } 
    } 
    } 
    }); 
    } 

    private void takePicture(){ 
    Log.d(LOG_TAG, LOG_LINE + "takePicture() entered."); 

    _camera.takePicture(_shutterCallback, null, _jpegCallback); 
    _previewIsRunning = false; 

    Log.d(LOG_TAG, LOG_LINE + "takePicture() finished."); 
    } 

    private ShutterCallback _shutterCallback = new ShutterCallback() { 
    @Override 
    public void onShutter() { 
    Log.d(LOG_TAG, LOG_LINE + "_shutterCallback.onShutter() called."); 
    } 
}; 

private PictureCallback _jpegCallback = new PictureCallback() { 
    @Override 
    public void onPictureTaken(byte[] data, Camera camera) { 
    Log.d(LOG_TAG, LOG_LINE + "_jpegCallback.onPictureTaken() called."); 

    _camera.startPreview(); 
    _previewIsRunning = true; 
    } 
}; 

@Override 
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { 
    if(_previewIsRunning){ 
    Log.d(LOG_TAG, LOG_LINE + "About to stop preview..."); 

    _camera.stopPreview(); 

    Log.d(LOG_TAG, LOG_LINE + "Stopped preview."); 
    } 

    try{ 
    Log.d(LOG_TAG, LOG_LINE + "About to set up camera parameters..."); 

    Camera.Parameters parameters = _camera.getParameters(); 

    //Get the optimal preview size so we don't get an exception when setting the parameters 
    List<Size> supportedPreviewSizes = parameters.getSupportedPreviewSizes(); 
    Size optimalPreviewSize = CameraUtil.getOptimalPreviewSize(supportedPreviewSizes, width, height); 

    parameters.setPreviewSize(optimalPreviewSize.width, optimalPreviewSize.height); 
    parameters.setFocusMode(Parameters.FOCUS_MODE_AUTO); 
    parameters.setFlashMode(Parameters.FLASH_MODE_AUTO); 

    _camera.setDisplayOrientation(90); 

    _camera.setParameters(parameters); 

    _camera.setPreviewDisplay(holder); 

    Log.d(LOG_TAG, LOG_LINE + "Finished setting up camera parameters."); 
    } 
    catch(Exception ex){ 
    ex.printStackTrace(); 
    Log.e(LOG_TAG, ex.toString()); 
    } 

    Log.d(LOG_TAG, LOG_LINE + "About to start preview..."); 

    _camera.startPreview(); 
    _previewIsRunning = true; 

    Log.d(LOG_TAG, LOG_LINE + "Started preview."); 
} 

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

@Override 
public void surfaceDestroyed(SurfaceHolder holder) { 
    Log.d(LOG_TAG, LOG_LINE + "Tearing down camera because surface was destroyed..."); 

    _camera.stopPreview(); 
    _previewIsRunning = false; 
    _camera.release(); 

    Log.d(LOG_TAG, LOG_LINE + "Finished tearing down camera because surface was destroyed."); 
} 

@Override 
public void onConfigurationChanged(Configuration newConfig){ 
    Log.d(LOG_TAG, LOG_LINE + "About to set request orientation to SCREEN_ORIENTATION_PORTRAIT..."); 

    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 

    Log.d(LOG_TAG, LOG_LINE + "Successfully set request orientation to SCREEN_ORIENTATION_PORTRAIT."); 
} 
} 

[CameraUtil.java]

package spikes.cameraSpike03; 

import java.util.List; 

import android.hardware.Camera.Size; 

public class CameraUtil { 
private CameraUtil(){} 

/** 
    * Returns a Size object containing the dimensions for an optimal preview size for the current hardware. 
    * This code is based on that found at: http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/graphics/CameraPreview.html 
    * 
    * @param supportedSizes 
    * A list of Size objects representing all the known preview sizes supported by this hardware. 
    * 
    * @param w 
    * The surface width. 
    * 
    * @param h 
    * The surface height. 
    * 
    * @return 
    * Returns a Size object containing the dimensions for an optimal preview size for the current hardware. 
    */ 
public static Size getOptimalPreviewSize(List<Size> supportedSizes, int w, int h) { 
     final double ASPECT_TOLERANCE = 0.05; 
     double targetRatio = (double) w/h; 
     if (supportedSizes == 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 : supportedSizes) { 
      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 : supportedSizes) { 
       if (Math.abs(size.height - targetHeight) < minDiff) { 
        optimalSize = size; 
        minDiff = Math.abs(size.height - targetHeight); 
       } 
      } 
     } 
     return optimalSize; 
    } 
} 

Mọi đề xuất sẽ được đánh giá cao.

Cảm ơn bạn.

Answer 1

Tôi cũng gặp vấn đề tương tự. sau đó tôi tìm thấy startPreview là rất quan trọng.

_camera.startPreview() là rất quan trọng trước khi takePicutre kiểm tra điểm 5 và 6 trong liên kết này.

http://developer.android.com/reference/android/hardware/Camera.html