在android相机“camera.setParameters”失败

at android.hardware.Camera.native_setParameters(Native Method) at     
android.hardware.Camera.setParameters(Camera.java:647) at com.CameraApp.Preview.surfaceChanged(Preview.java:67) at  
android.view.SurfaceView.updateWindow(SurfaceView.java:538) at 
android.view.SurfaceView.dispatchDraw(SurfaceView.java:339) at 
android.view.ViewGroup.drawChild(ViewGroup.java:1638) at 
android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) at 
android.view.ViewGroup.drawChild(ViewGroup.java:1638) at 
android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) at 
android.view.ViewGroup.drawChild(ViewGroup.java:1638) at 
android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) at 
android.view.View.draw(View.java:6743) at 
android.widget.FrameLayout.draw(FrameLayout.java:352) at 
android.view.ViewGroup.drawChild(ViewGroup.java:1640) at 
android.view.ViewGroup.dispatchDraw(ViewGroup.java:1367) at 
android.view.View.draw(View.java:6743) at 
android.widget.FrameLayout.draw(FrameLayout.java:352) at 
com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1842) at 
android.view.ViewRoot.draw(ViewRoot.java:1407) at 
android.view.ViewRoot.performTraversals(ViewRoot.java:1163) at 
android.view.ViewRoot.handleMessage(ViewRoot.java:1727) at 
android.os.Handler.dispatchMessage(Handler.java:99) at 
android.os.Looper.loop(Looper.java:123) at 
android.app.ActivityThread.main(ActivityThread.java:4627) at 
java.lang.reflect.Method.invokeNative(Native Method) at 
java.lang.reflect.Method.invoke(Method.java:521) at

我在2.2模拟器上运行应用程序也检查它。但它工作正常。任何人都可以请告诉我为什么错误发生？在android相机“camera.setParameters”失败

此代码，我用

SurfaceHolder mHolder; 
    public Camera camera; 

    Preview(Context context) { 
     super(context); 

     // Install a SurfaceHolder.Callback so we get notified when the 
     // underlying surface is created and destroyed. 
     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 



    public void surfaceCreated(SurfaceHolder holder) { 
     // The Surface has been created, acquire the camera and tell it where 
     // to draw. 
     camera = Camera.open(); 
     try { 
      camera.setPreviewDisplay(holder); 
     } catch (IOException exception) { 
      camera.release(); 
      camera = null; 
      // TODO: add more exception handling logic here 
     } 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
     // Surface will be destroyed when we return, so stop the preview. 
     // Because the CameraDevice object is not a shared resource, it's very 
     // important to release it when the activity is paused. 
     camera.stopPreview(); 
     camera.release(); 
     camera = null; 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
     // Now that the size is known, set up the camera parameters and begin 
     // the preview. 

     Camera.Parameters parameters = camera.getParameters(); 
     parameters.setPreviewSize(w, h); 
     camera.setParameters(parameters); 
     camera.startPreview(); 
    } 

@Override 
public void draw(Canvas canvas) { 
     super.draw(canvas); 
     Paint p= new Paint(Color.RED); 
     Log.d(TAG,"draw"); 
     canvas.drawText("PREVIEW", canvas.getWidth()/2, canvas.getHeight()/2, p); 
}

来源

2011-11-05 Ansh Patel

变化这在你的代码。

public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
    Camera.Parameters parameters = camera.getParameters(); 
    List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes(); 

    // You need to choose the most appropriate previewSize for your app 
    Camera.Size previewSize = // .... select one of previewSizes here 

    parameters.setPreviewSize(previewSize.width, previewSize.height); 
    camera.setParameters(parameters); 
    camera.startPreview(); 
}

感谢..

如果任何查询剩余然后告诉我

来源

2011-11-05 11:44:38

在android相机“camera.setParameters”失败

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