android - 无法在Android Camera对象上设置自动闪光

我正在运行一个使用surfaceView来显示Camera对象输出的应用程序，并且在拍照时需要设置自动闪光。我以为这可能很简单，但是我错了！
这是我的代码：

public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    Camera.Parameters params = mCamera.getParameters();
    Camera.Size result = getBestPreviewSize(params, width, height);
    params.setPreviewSize(result.width, result.height);
    params.setPictureFormat(ImageFormat.JPEG);
    params.setJpegQuality(100);
    params.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
    params.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
    params.setPictureSize(dpWidth, dpWidth);
    params.setRotation(90);
    mCamera.setParameters(params);

    mCamera.startPreview();

}

并且清单具有正确的权限。当我启动代码时，这是错误：

06-17 13:54:48.260: E/AndroidRuntime(19901): FATAL EXCEPTION: main
06-17 13:54:48.260: E/AndroidRuntime(19901): Process: it.giozh.app, PID: 19901
06-17 13:54:48.260: E/AndroidRuntime(19901): java.lang.RuntimeException: setParameters failed
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.hardware.Camera.native_setParameters(Native Method)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.hardware.Camera.setParameters(Camera.java:1651)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at it.ictinnova.hipstamemostylist.ScattaFoto.surfaceChanged(TakePic.java:144)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.SurfaceView.updateWindow(SurfaceView.java:583)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.SurfaceView.access$000(SurfaceView.java:86)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:175)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:847)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1867)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:996)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5600)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.Choreographer.doCallbacks(Choreographer.java:574)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.Choreographer.doFrame(Choreographer.java:544)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.os.Handler.handleCallback(Handler.java:733)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.os.Handler.dispatchMessage(Handler.java:95)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.os.Looper.loop(Looper.java:136)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at android.app.ActivityThread.main(ActivityThread.java:5001)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at java.lang.reflect.Method.invokeNative(Native Method)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at java.lang.reflect.Method.invoke(Method.java:515)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
06-17 13:54:48.260: E/AndroidRuntime(19901):    at dalvik.system.NativeStart.main(Native Method)

怎么了？

最佳答案

从您的编码角度来看，这没什么错。其特定于供应商的问题。在某些设备中，设置参数在某些设备中无效。我发现附带的解决方案放在try catch块的代码行下面。我也建议您检查一下您要设置的所有参数，以检查相机不允许设置哪些参数。对我来说，设置高度和宽度失败。

mCamera.setParameters(params);

检查您是否在清单中设置了这些功能

android.hardware.camera.autofocus

android.hardware.camera.flash

如果找到其他解决方案，请添加评论。