The reason you are getting the error is that some execution paths in your code do not set a value to hours. It is difficult to see this problem because you are mixing input validation with result calculation logic. You could just initialize hours to 0, but I suspect that your program still won’t work … Read more
you need to use activity or context, for example, please refer below code AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(activity) .setCancelable(false) .setPositiveButton(“Ok”, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { activity.startActivity(new Intent(activity, DetailView.class)); } }).setNegativeButton(“Cancel”, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alertDialog = alertDialogBuilder.create(); alertDialog.show(); you can … Read more
Java Compilation error 12 : error: expected : Initializing and declaring of variable in separate statement . [duplicate] solved Java Compilation error 12 : error: expected : Initializing and declaring of variable in separate statement . [duplicate]
You’ve mentioned the layout file names instead of name of the activities Your code: Intent in = new Intent(activity_menu.this,activity_dishes.class); It should be: Intent in = new Intent(Menu.this,Dishes.class); Mention the name of the activity, not layout files. 0 solved Cannot resolve symbol ‘x’
You can’t. While in native Win32 various handles are basically an integer type, they are not pointers and they are not really indexes, and you are not suppose to brute force unhooking the way you are trying to do. In any case, in the JNA, the HHOOK type is an object, and it has no … Read more
how are you? I have made 3 alterations in 2 classes. have a look to see if it will work for you. //Computers turn to roll the dice. public void computerTurn() { computerTurnNumber = 0; // here turnScore = 0; System.out.println(“Computer’s turn: “); while (computerTurnNumber < 20) { // here is the amount of time … Read more
CompareTo method does have an implementation. The method is implemented in all the classes such as Integer, Double etc. In your case you are using String’s compareTo method. If you want it to be customized as per your class, you do so by overriding the compareTo method. 1 solved how comparable interface return int value, … Read more
I guess you are looking for something like this: public class TestClass { public final String hallo; public static final String halloSecond = “Saluto!”; TestClass(String hello){ String hallo = hello; } public static void main(String[] args) { TestClass test = new TestClass(“Tjena!”); System.out.println(“I want “Tjena!”: ” + test.hallo); TestClass testSecond = new TestClass(“1”); System.out.println(“I want … Read more
You should have at least one attribute in your Grades class. You cant cast Grade to Integer. Calculate grades in your main/test or other class via get method. solved Cast a special java object to an integer [closed]
Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference solved Attempt to invoke virtual method ‘void android.widget.Button.setOnClickListener(android.view.View$OnClickListener)’ on a null object reference
You can initialize the variable either inside the constructor or outside, both have their benefits and drawbacks. There are a few reasons as explained in the following threads: Should I initialize variable within constructor or outside constructor Should I instantiate instance variables on declaration or in the constructor? 2 solved Java declaring private member variables … Read more
The thing is you can not access Ui element in a non-Ui thread. So you must be getting a Runtime exception. You can use runOnUi() or a Handler to do it on Main Thread . Where runOnUi() is a method of Activity class and A Handler allows you to send and process Message and Runnable … Read more
I think you are only missing a small piece: String restoredText; String restoredname; public void addNotification(Context context) { getPref(context); String myString = restoredText + ” ” + restoredname; … .setContentText(myString) … } public void getPref(Context context) { restoredText = sp.getString(“purpose”, “”); restoredname = sp.getString(“name”, “”); } solved Android programming broadcastreceiver
First: In your case, you have a mistype with that line. Instead of: MediaPlayer cheer = MediaPlayer.create(MainActivity, this, R.raw.fischkarte); Use: MediaPlayer cheer = MediaPlayer.create(MainActivity.this, R.raw.fischkarte); MediaPlayer static method create() takes two arguments, not three. Also, you can’t just send only the activity name. Second: I think you’ll face another problem if you interrupt a Main … Read more
Jeru’s answer is correct for this case. If you have a case with bigger noise where morpholigocal operations won’t take them out, you can make a cutoff with the contour size, something like for contour in contours if cv2.contourArea(contour) > minimal_length before counting 1 solved How to calculate the number of shapes detected after thresholding