android exercise tracker

Challenge Exercise: Delete Crime records criminalintent references currently do not support deleting existing crimes records, add menu items for Crimefragment, allow users to delete current record, click Delete menu item, Remember to call the finish method of the Crimefragment managed activity to fall back to the previous activity interface.First, add a menu item for crime.Create a layout file named Crimefragment_crime under the menu folder with the f

Exercise caution when developing a UDP data transmission system between Android phones TIPS:1. The communication between mobile UDP and a fixed IP is not a big problem, but it may also cause a slight packet loss. The problem cannot be found here. Do you think there are special considerations for UDP implementation at the android network layer.2. UDP communication

Use and exercise of system Permissions by Android 6.0 developers (Permissions Best Practices) During the installation process, you can easily ignore permission requests. If a user is frustrated with the application or is worried about leaking personal information, the user will not need to use the application or uninstall it. How can we avoid this problem?Consider Using an Intent In many cases, you may make

Android:id= "@+id/click"android:gravity= "Center"Android:text= "Create New Crime"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"/>Then set the global variables for the TextView and Button in the CrimelistfragmentPrivate TextView Mtextview; Private Button Mclick;The two variables are then initialized in the Oncreateview () method and a Click event is set on the button, where the click event is the same as the Click event for the Menu menu item1Mtextview =(TextView)

Oncreateviewholder (viewgroup parent,intViewType) { -Layoutinflater Layoutinflater =Layoutinflater.from (Getactivity ());WuyiView view = Layoutinflater.inflate (R.layout.nerd_launcher_item,parent,false); the return Newactivityholder (view); - } Wu - @Override About Public voidOnbindviewholder (Activityholder Activityholder,intposition) { $ResolveInfo ResolveInfo =Mactivities.get (position); - activityholder.bindactivity (resolveInfo); - } - A @Override +

Android Studio 2.3.2. Reference article: http://blog.csdn.net/like_program/article/details/518136321. New Project Mycalculator, all the way next, the default values are used.2. Modify the contents of the three XML files as required. Many local engineering names are different and changed to their own names.3. Follow the steps to modify the Activity_main. XML file, encountered a problem:Android:singleline= "false" obsoleteTemporary handling: Delete this

Notice that there is only one crime record, and the subtitle showing the total number of records is displayed: 1 crimes. Please correct this careless grammatical error.In the implementation of the idea, you can prepare different string resources in the code to use, but this will give the application localization manufacturing trouble. It is good practice to use complex string resources (also known as quantization strings).First, the complex string resource is defined in the Strings.xml file.Then