对焦后Android相机takePicture失败

Question

Following code uses to get jpeg-photo from camera

public void getPhoto(final PictureCallback callback, final Runnable focusFailCallback) {
    if(!Camera.Parameters.FOCUS_MODE_FIXED.equals(mCamera.getParameters().getFocusMode()) &&
            !Camera.Parameters.FOCUS_MODE_INFINITY.equals(mCamera.getParameters().getFocusMode())) {
        mCamera.autoFocus(new AutoFocusCallback() {
            @Override
            public void onAutoFocus(boolean success, Camera camera) {
                if(success) {
                    camera.takePicture(null, null, null, callback);
                } else {
                    camera.cancelAutoFocus();
                    focusFailCallback.run();
                }
            }
        });
    } else {
        mCamera.takePicture(null, null, null, callback);
    }
}

Mostly it works fine. It calls between startPreview and stopPreview calls, so I have not problems about that. But at random moments it can throw exception.

java.lang.RuntimeException: takePicture failed
android.hardware.Camera.native_takePicture(Native Method)
android.hardware.Camera.takePicture(Camera.java:1828)
org.opencv.android.JavaCameraView$2.onAutoFocus(JavaCameraView.java:463)
android.hardware.Camera$EventHandler.handleMessage(Camera.java:1273)
android.os.Handler.dispatchMessage(Handler.java:111)
android.os.Looper.loop(Looper.java:194)
android.app.ActivityThread.main(ActivityThread.java:5534)
java.lang.reflect.Method.invoke(Native Method)
java.lang.reflect.Method.invoke(Method.java:372)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)

I have no idea what could happen that I didn't provide for.

Answer 1

我曾在一个摩托E3和其他一些设备，并调用了同样的问题cancelAutoFocus权利之前camera.takePicture作出的崩溃消失。