Java 无法更新调用FromErrorThreadException的用户界面(使用openCV)
我正在用OpenCV库实现一个应用程序。处理完相机的输入帧后,我想更新我的文本视图。但是,我得到以下错误:Java 无法更新调用FromErrorThreadException的用户界面(使用openCV),java,android,multithreading,opencv,user-interface,Java,Android,Multithreading,Opencv,User Interface,我正在用OpenCV库实现一个应用程序。处理完相机的输入帧后,我想更新我的文本视图。但是,我得到以下错误: 08-01 17:01:45.085: E/AndroidRuntime(16284): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 以下是我的应用程序的简化代码:
08-01 17:01:45.085: E/AndroidRuntime(16284): android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.
以下是我的应用程序的简化代码:
(...IMPORTS...)
public class ObjectTracker extends Activity implements CvCameraViewListener2, OnClickListener {
TextView resultTextView;
private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
myJavaCameraView.enableView();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public ObjectTracker() {
Log.i(TAG, "Instantiated new " + this.getClass());
}
@Override
public void onCreate(Bundle savedInstanceState) {
(...)
resultTextView = (TextView)
findViewById(R.id.activity_object_tracker_native_textview_result);
}
@Override
public void onPause()
{
super.onPause();
if (myJavaCameraView != null)
myJavaCameraView.disableView();
}
@Override
public void onResume()
{
super.onResume();
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_6, this, mLoaderCallback);
}
public void onDestroy() {
super.onDestroy();
if (myJavaCameraView != null)
myJavaCameraView.disableView();
}
public void onCameraViewStarted(int width, int height) {
}
public void onCameraViewStopped() {
}
public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
(...)
return trackFilteredObject(filteredFrame, newInputFrame);
}
public Mat trackFilteredObject(Mat filteredFrame, Mat inputFrame)
{
(...)
//HERE I WANT TO UPDATE MY TEXT VIEW
return inputImage;
}
}
我不知道我应该把更新代码放在哪里来消除这个错误。有人能帮我吗?只能从主UI线程修改UI内容。回调的
trackFilteredObject
方法(更新TextView
)显然是从后台线程调用的
为了解决这个问题,您可以使用这个方法,它允许您发布要在UI线程上执行的runnable
试着替换
//HERE I WANT TO UPDATE MY TEXT VIEW
借
只能从主UI线程修改UI内容。回调的
trackFilteredObject
方法(更新TextView
)显然是从后台线程调用的
为了解决这个问题,您可以使用这个方法,它允许您发布要在UI线程上执行的runnable
试着替换
//HERE I WANT TO UPDATE MY TEXT VIEW
借
我找到了一个解决方案:
public Mat trackFilteredObject(Mat filteredFrame, Mat inputFrame)
{
(...)
runOnUiThread(new Runnable() {
public void run() {
//HERE I UPDATE TEXT VIEW
}
});
return inputImage;
}
感谢@fiddler的帮助我找到了一个解决方案:
public Mat trackFilteredObject(Mat filteredFrame, Mat inputFrame)
{
(...)
runOnUiThread(new Runnable() {
public void run() {
//HERE I UPDATE TEXT VIEW
}
});
return inputImage;
}
谢谢@fiddler的帮助您的解决方案无效。我仍然会遇到相同的异常…可能问题出在onResume()方法中?还有其他想法吗?你的解决方案不起作用。我仍然会遇到相同的异常…可能问题出在onResume()方法中?还有其他想法吗?