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我一直试图在使用相机实时预览作为背景的某个条件之后调用同一个类。但是我得到一个错误。调用相同的活动并在surfaceview中创建相机
的logcat：
02-03 19:52:42.274: E/AndroidRuntime(454): FATAL EXCEPTION: main
02-03 19:52:42.274: E/AndroidRuntime(454): java.lang.RuntimeException: Fail to connect to camera service
02-03 19:52:42.274: E/AndroidRuntime(454): at android.hardware.Camera.native_setup(Native Method)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.hardware.Camera.<init>(Camera.java:258)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.hardware.Camera.open(Camera.java:235)
02-03 19:52:42.274: E/AndroidRuntime(454): at com.example.gems.GamePlay.surfaceCreated(GamePlay.java:996)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.SurfaceView.updateWindow(SurfaceView.java:543)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:348)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.drawChild(ViewGroup.java:1644)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.View.draw(View.java:6883)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.widget.FrameLayout.draw(FrameLayout.java:357)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.drawChild(ViewGroup.java:1646)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.View.draw(View.java:6883)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.widget.FrameLayout.draw(FrameLayout.java:357)
02-03 19:52:42.274: E/AndroidRuntime(454): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1862)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewRoot.draw(ViewRoot.java:1522)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewRoot.performTraversals(ViewRoot.java:1258)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.os.Handler.dispatchMessage(Handler.java:99)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.os.Looper.loop(Looper.java:123)
02-03 19:52:42.274: E/AndroidRuntime(454): at android.app.ActivityThread.main(ActivityThread.java:3683)
02-03 19:52:42.274: E/AndroidRuntime(454): at java.lang.reflect.Method.invokeNative(Native Method)
02-03 19:52:42.274: E/AndroidRuntime(454): at java.lang.reflect.Method.invoke(Method.java:507)
02-03 19:52:42.274: E/AndroidRuntime(454): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-03 19:52:42.274: E/AndroidRuntime(454): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-03 19:52:42.274: E/AndroidRuntime(454): at dalvik.system.NativeStart.main(Native Method)
我创建我的相机这样。
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
boolean previewing = false;
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.camerapreview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height)
{
// TODO Auto-generated method stub
if(previewing){
camera.stopPreview();
previewing = false;
}
if (camera != null){
Parameters parameters = camera.getParameters();
Display display = ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
if(display.getRotation() == Surface.ROTATION_0)
{
parameters.setPreviewSize(height, width);
camera.setDisplayOrientation(90);
}
if(display.getRotation() == Surface.ROTATION_90)
{
parameters.setPreviewSize(width, height);
}
if(display.getRotation() == Surface.ROTATION_180)
{
parameters.setPreviewSize(height, width);
}
if(display.getRotation() == Surface.ROTATION_270)
{
parameters.setPreviewSize(width, height);
camera.setDisplayOrientation(180);
}
camera.setParameters(parameters);
try
{
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
}
catch(Exception e)
{
Log.d("Error", "Cannot start preview", e);
}
}
}
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub
try {
camera = Camera.open();
camera.setPreviewDisplay(surfaceHolder);
} catch (IOException e) { }
}
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
if (null == camera)
return;
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
当我尝试打电话完成，然后再次回忆这个同样的类我得到的错误在顶部。有任何想法吗？