您好我正在使用API来控制Android中的相机。我正在做一个getImages函数，但是当我尝试takePicture时，我在logcat中出现了这个错误：
06-18 09:25:44.319: E/AndroidRuntime(2918): FATAL EXCEPTION: main
06-18 09:25:44.319: E/AndroidRuntime(2918): Process: org.gradiant.democamera, PID: 2918
06-18 09:25:44.319: E/AndroidRuntime(2918): java.lang.IllegalStateException: Could not execute method of the activity
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.view.View$1.onClick(View.java:3823)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.view.View.performClick(View.java:4438)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.view.View$PerformClick.run(View.java:18422)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.os.Handler.handleCallback(Handler.java:733)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.os.Handler.dispatchMessage(Handler.java:95)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.os.Looper.loop(Looper.java:136)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.app.ActivityThread.main(ActivityThread.java:5001)
06-18 09:25:44.319: E/AndroidRuntime(2918): at java.lang.reflect.Method.invokeNative(Native Method)
06-18 09:25:44.319: E/AndroidRuntime(2918): at java.lang.reflect.Method.invoke(Method.java:515)
06-18 09:25:44.319: E/AndroidRuntime(2918): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
06-18 09:25:44.319: E/AndroidRuntime(2918): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
06-18 09:25:44.319: E/AndroidRuntime(2918): at dalvik.system.NativeStart.main(Native Method)
06-18 09:25:44.319: E/AndroidRuntime(2918): Caused by: java.lang.reflect.InvocationTargetException
06-18 09:25:44.319: E/AndroidRuntime(2918): at java.lang.reflect.Method.invokeNative(Native Method)
06-18 09:25:44.319: E/AndroidRuntime(2918): at java.lang.reflect.Method.invoke(Method.java:515)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.view.View$1.onClick(View.java:3818)
06-18 09:25:44.319: E/AndroidRuntime(2918): ... 11 more
06-18 09:25:44.319: E/AndroidRuntime(2918): Caused by: java.lang.RuntimeException: takePicture failed
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.hardware.Camera.native_takePicture(Native Method)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.hardware.Camera.takePicture(Camera.java:1245)
06-18 09:25:44.319: E/AndroidRuntime(2918): at android.hardware.Camera.takePicture(Camera.java:1190)
06-18 09:25:44.319: E/AndroidRuntime(2918): at org.gradiant.camara.CameraAcquisition.GetImage(CameraAcquisition.java:146)
06-18 09:25:44.319: E/AndroidRuntime(2918): at org.gradiant.democamera.MainActivity.getFrame(MainActivity.java:30)
06-18 09:25:44.319: E/AndroidRuntime(2918): ... 14 more
这是我的代码：
public void GetImage() {
mCamera = StartCapture();
mCamera.startPreview();
mCamera.takePicture(null, null, new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
}
});
}
public Camera StartCapture() {
int cameraCount = 0;
Camera cam = null;
Camera.CameraInfo cameraInfo = new Camera.CameraInfo();
cameraCount = Camera.getNumberOfCameras();
for (int camIdx = 0; camIdx < cameraCount; camIdx++) {
Camera.getCameraInfo(camIdx, cameraInfo);
if (cameraInfo.facing == camera_used) {
try {
cam = Camera.open(camIdx);
android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
android.hardware.Camera.getCameraInfo(camIdx, info);
int rotation = ((Activity) context_class)
.getWindowManager().getDefaultDisplay()
.getRotation();
int degrees = 0;
switch (rotation) {
case Surface.ROTATION_0:
degrees = 0;
break;
case Surface.ROTATION_90:
degrees = 90;
break;
case Surface.ROTATION_180:
degrees = 180;
break;
case Surface.ROTATION_270:
degrees = 270;
break;
}
int result;
if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
result = (info.orientation + degrees) % 360;
result = (360 - result) % 360; // compensate the mirror
} else { // back-facing
result = (info.orientation - degrees + 360) % 360;
}
cam.setDisplayOrientation(result);
// other options, as resolution, format, etc
Camera.Parameters params = mCamera.getParameters();
mCamera.setParameters(params);
} catch (RuntimeException e) {
}
}
}
return cam;
}
问题出在哪里？我做错了什么？
由于
编辑：
根据评论意见，这些是两条相互矛盾的界限：
在MainActivity中：
camera.GetImage();
在调用方法时，在方法中：
mCamera.takePicture(null, null, new PictureCallback()