Android 2.2 SDK - SetParameters fehlgeschlagen für Camera API auf Nexus One

Question

Ich benutze eine leicht modifizierte Version der Camera API Demo und es funktioniert im Emulator. Ich verwende eine Klasse reflektiert ich in einen der Mailing-Gruppen gefunden, aber ich habe immer diese Fehlermeldung erhalten, wenn auf meinem Nexus One (Android 2.2.1) Prüfung:

12-29 13:22:04.027: ERROR/QualcommCameraHardware(2145): Invalid preview size requested: 320x402 
12-29 13:22:04.037: DEBUG/AndroidRuntime(16514): Shutting down VM 
12-29 13:22:04.037: WARN/dalvikvm(16514): threadid=1: thread exiting with uncaught exception (group=0x4001d7f0) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514): FATAL EXCEPTION: main 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514): java.lang.RuntimeException: setParameters failed 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.hardware.Camera.native_setParameters(Native Method) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.hardware.Camera.setParameters(Camera.java:647) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at com.android.iwasthere.Preview.surfaceChanged(Preview.java:78) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.SurfaceView.updateWindow(SurfaceView.java:538) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.SurfaceView.dispatchDraw(SurfaceView.java:339) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.View.draw(View.java:6743) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.drawChild(ViewGroup.java:1640) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.drawChild(ViewGroup.java:1638) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.View.draw(View.java:6743) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.widget.FrameLayout.draw(FrameLayout.java:352) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewRoot.draw(ViewRoot.java:1407) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewRoot.performTraversals(ViewRoot.java:1163) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.os.Handler.dispatchMessage(Handler.java:99) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.os.Looper.loop(Looper.java:123) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at java.lang.reflect.Method.invoke(Method.java:521) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
12-29 13:22:04.047: ERROR/AndroidRuntime(16514):  at dalvik.system.NativeStart.main(Native Method) 

CameraPreview.java

package xxx; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.Window; 

public class CameraPreview extends Activity { 

    private Preview mPreview; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 

     mPreview = new Preview(this); 
     setContentView(mPreview); 

    } 

} 

Preview.java

package xxx; 
import java.io.IOException; 
import java.util.List; 

import android.content.Context; 
import android.hardware.Camera; 
import android.hardware.Camera.Size; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 

class Preview extends SurfaceView implements SurfaceHolder.Callback { 

    SurfaceHolder mHolder; 
    Camera mCamera; 

    Preview(Context context) { 
     super(context); 

     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 

    } 

    public void surfaceCreated(SurfaceHolder holder) { 

     mCamera = Camera.open(); 
     try { 

      mCamera.setPreviewDisplay(holder); 

     } catch (IOException exception) { 

      mCamera.release(); 
      mCamera = null; 

     } 

    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 

     mCamera.stopPreview(); 
     mCamera.release(); 
     mCamera = null; 

    } 


    private Size getOptimalPreviewSize(List<Size> sizes, int w, int h) { 

     final double ASPECT_TOLERANCE = 0.05; 
     double targetRatio = (double) w/h; 
     if (sizes == null) return null; 

     Size optimalSize = null; 
     double minDiff = Double.MAX_VALUE; 

     int targetHeight = h; 

     for (Size size : sizes) { 
      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); 
      } 
     } 

     if (optimalSize == null) { 
      minDiff = Double.MAX_VALUE; 
      for (Size size : sizes) { 
       if (Math.abs(size.height - targetHeight) < minDiff) { 
        optimalSize = size; 
        minDiff = Math.abs(size.height - targetHeight); 
       } 
      } 
     } 

     return optimalSize; 

    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 

     Camera.Parameters parameters = mCamera.getParameters(); 

     //MODIFIED HERE 
     List<Size> sizes = Reflect.getSupportedPictureSizes(parameters); 
     //List<Size> sizes = parameters.getSupportedPreviewSizes(); 
     Size optimalSize = getOptimalPreviewSize(sizes, w, h); 
     parameters.setPreviewSize(optimalSize.width, optimalSize.height); 

     mCamera.setParameters(parameters); 
     mCamera.startPreview(); 

    } 

} 

Reflect.java

package xxx; 
import java.lang.reflect.InvocationTargetException; 
import java.lang.reflect.Method; 
import java.util.List; 

import android.hardware.Camera; 
import android.hardware.Camera.Size; 

public class Reflect { 

    private static Method Parameters_getSupportedPictureSizes; 
    private static Method Parameters_getSupportedPreviewSizes; 

    static { 
     initCompatibility(); 
    }; 

    private static void initCompatibility() { 
     try { 
      Parameters_getSupportedPictureSizes = Camera.Parameters.class 
        .getMethod("getSupportedPictureSizes", new Class[] {}); 
      /* success, this is a newer device */ 
     } catch (NoSuchMethodException nsme) { 
      /* failure, must be older device */ 
     } 
     try { 
      Parameters_getSupportedPreviewSizes = Camera.Parameters.class 
        .getMethod("getSupportedPreviewSizes", new Class[] {}); 
      /* success, this is a newer device */ 
     } catch (NoSuchMethodException nsme) { 
      /* failure, must be older device */ 
     } 
    } 

    @SuppressWarnings("unchecked") 
    public static List<Size> getSupportedPictureSizes(Camera.Parameters p) { 
     try { 
      if (Parameters_getSupportedPictureSizes != null) { 
       return (List<Size>) Parameters_getSupportedPictureSizes 
         .invoke(p); 
      } else { 
       return null; 
      } 
     } catch (InvocationTargetException ite) { 
      /* unpack original exception when possible */ 
      Throwable cause = ite.getCause(); 
      if (cause instanceof RuntimeException) { 
       throw (RuntimeException) cause; 
      } else if (cause instanceof Error) { 
       throw (Error) cause; 
      } else { 
       throw new RuntimeException(ite); 
      } 
     } catch (IllegalAccessException ie) { 
      System.err.println("unexpected " + ie); 
      return null; 
     } 
    } 

    @SuppressWarnings("unchecked") 
    public static List<Size> getSupportedPreviewSizes(Camera.Parameters p) { 
     try { 
      if (Parameters_getSupportedPreviewSizes != null) { 
       return (List<Size>) Parameters_getSupportedPreviewSizes 
         .invoke(p); 
      } else { 
       return null; 
      } 
     } catch (InvocationTargetException ite) { 
      /* unpack original exception when possible */ 
      Throwable cause = ite.getCause(); 
      if (cause instanceof RuntimeException) { 
       throw (RuntimeException) cause; 
      } else if (cause instanceof Error) { 
       throw (Error) cause; 
      } else { 
       /* 
       * unexpected checked exception; wrap and re-throw 
       */ 
       throw new RuntimeException(ite); 
      } 
     } catch (IllegalAccessException ie) { 
      return null; 
     } 
    } 
} 

Answer 1

Ungültige Vorschaugröße angefordert: 320x402

Sie können nicht beliebig Vorschau Größen verwenden. Sie müssen Camera.Parameters.getSupportedPreviewSizes() und Camera.Parameters.getSupportedPictureSizes() verwenden, um die nächste Vorschau und die Bildgröße in der gewünschten Größe zu finden.