Xamarin

问题 My question is similar to this question Android - Switch ActionBar Back Button to Navigation Button, but I have problems using the Java code that I changed to c#. import android.support.v7.app.ActionBarDrawerToggle import android.support.v4.widget.DrawerLayout ActionBarDrawerToggle mDrawerToggle; DrawerLayout drawerLayout; private boolean mToolBarNavigationListenerIsRegistered = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

问题 My question is similar to this question Android - Switch ActionBar Back Button to Navigation Button, but I have problems using the Java code that I changed to c#. import android.support.v7.app.ActionBarDrawerToggle import android.support.v4.widget.DrawerLayout ActionBarDrawerToggle mDrawerToggle; DrawerLayout drawerLayout; private boolean mToolBarNavigationListenerIsRegistered = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);

问题 I am defining a custom Shell.TitleView in a way to preserve the Tab/Page title of my ContentPage as follow: <Shell.TitleView> <Label Text="Page2" FontSize="20" VerticalTextAlignment="Center"/> <!-- rest of my TitleView irrelevant in this question--> </Shell.TitleView> The issue here is that the generated title by the default Shell.TitleView (in the second Tab) is different from mine (the difference is more noticeable when you navigate from one tab to the other than in screenshots), at first I

问题 I am defining a custom Shell.TitleView in a way to preserve the Tab/Page title of my ContentPage as follow: <Shell.TitleView> <Label Text="Page2" FontSize="20" VerticalTextAlignment="Center"/> <!-- rest of my TitleView irrelevant in this question--> </Shell.TitleView> The issue here is that the generated title by the default Shell.TitleView (in the second Tab) is different from mine (the difference is more noticeable when you navigate from one tab to the other than in screenshots), at first I

问题 I need some help. I am new to Events and handlers and I would like to begin using events for decoupling purposes but I am confused. I have a class where I have a list view that is populated on OnAppearing. However to prevent onAppearing to happen each time the page is clicked I load the list once and then I would like to have items to get added or deleted to the list upon being added or removed from the server through the use of events. The ListView page is a list of my favorite newspaper

问题 I have successfully updated an app from Xamarin.Forms v2 to version 4.5. Unfortunately I am unable to install the app on the Android emulator, receiving the following error: Exception occurred while executing: java.lang.IllegalArgumentException: Error: Failed to parse APK file: /data/local/tmp/com.myapp.name-Signed.apk at com.android.server.pm.PackageManagerShellCommand.setParamsSize(PackageManagerShellCommand.java:338) at com.android.server.pm.PackageManagerShellCommand.runInstall

问题 I recently updated the Xamarin.Android.Support libraries from 24.2.1 to 25.3.1, so I was able to get Push Notifications to work on Android. While that made the Push Notifications work, it has now introduced an issue that only occurs when I build the project in Release mode, with ProGuard enabled. The final error is the very generic "java.exe" exited with code 1. The most meaningful I can extract from the Output window (when the Output setting has been set to Diagnostics) is Exception in

问题 I recently updated the Xamarin.Android.Support libraries from 24.2.1 to 25.3.1, so I was able to get Push Notifications to work on Android. While that made the Push Notifications work, it has now introduced an issue that only occurs when I build the project in Release mode, with ProGuard enabled. The final error is the very generic "java.exe" exited with code 1. The most meaningful I can extract from the Output window (when the Output setting has been set to Diagnostics) is Exception in

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would

问题 I have created a database using SQLite which store student details including Student Name (String) Student Password (String) Student ID (String) Student Attendance(Boolean) In my solution, there are 3 view controller as describe below: ViewController1 : Table View, Display List of Students. ViewController2 : Normal View Controller with 3 text field and 1 switch button to get all 4 user detail. ViewController3 : A button that enable user to tap, and turn the attendance (boolean) to on. I would