讲解：Android List、App、Java，c/c++C/C++|Java

Android List AppInstall Android Studio and use it to create an Android app that allows a user to create and view a list ofstrings. Then submit at Blackboard a .zip file of the folder containing your Android project (see CreateAndroid Project screen shot further below for how to find the correct folder). The one who submits theapp for your team should tell me in your submission who your teammate is.Detailed Requirements When you create the Android project for your app (see figure below), as the beginning threesegments of the Package name use your edu.duq followed by your Multipass username. Forinstance, the beginning of my Package name is edu.duq.jacksonj. The last segment of thePackage name will be generated automatically from the project Name. Also, note the Savelocation for your project, which you can change if you like. This is the folder you will need to zipand submit. The app must consist of two activities, one for entering strings one at a time, the other forviewing the list of strings.o The activity for entering strings is the one that should be displayed when the app beginsexecution. The activity for entering must have one text box and two buttons, one clicked to add the textbox contents to the list being created, the other clicked to view the list.o The text box and first button (the button for adding to the list) should be laid out as inthe Android Build your first app tutorial. The margins should be 16dp The text box should stretch horizontally to fit the available space. The baselines of the button and text box should be constrained to align.o Use the strings.xml file to set the hint for the text box and the text for the buttons, andgive an appropriate string for each.o When the first button is clicked, the string from the text box should be saved for laterdisplay and the text box should be cleared.o The second button (the button for displaying the list) should be 16dp below the firstbutton and should be centered horizontally. The activity for displaying the list should:o display a list with three newlines (\n) between strings (as in the Udacity example)o allow the user to scroll through the listo include an up (back) button allowing the user to return to the first activity where theycan create another list. Use an appropriate string, based onAndroid List作业代写、代做App留学生作业、代写Java，c/c++程序设计作业 帮做C/C++编程|帮做J the domain you specify when you create the app, whencalling the putExtra() method on an Intent object.Hints/Suggestions This assignment is more-or-less a merge of the projects that you will build if you work throughthe Android Build your first app tutorial and Udacity Developing Android Apps Lesson 1 (CreateProject Sunshine). I recommend that you begin by working through both the tutorial and lesson.o For the Android tutorial Build a simple user interface section Make the text box sizeflexible Item 2: You can see all the attributes for a view by clicking . Then selectLayout_Margin and assign 16 to right. Item 3: Return to viewing fewer attributes. Use the layout_width dropdown toselect match_constraint.o For the Udacity course, you can skip lesson 18, since newer versions of Android Studiouse ConstraintLayout in an empty activity by default. The Android EditText class has a setText() method that sets a text box to the value of thestring argument passed to setText(). I used this method to clear the text box (set it to theempty string). The Android Intent class has a getStringArrayExtra() method that returns an extravalue that is of type String[]. I used this method as part of passing the list of strings enteredin the main activity to the activity that displays the list. If your app crashes, you can click at the bottom of the Android Studio window inorder to see exceptions thrown by your app (this works with the emulator; I havent tested itwith an Android device). Click to return to the default pane that shows the progress ofthe compiler.Grading No points for an app that does not start up. 2 pts: Following directions (e.g., submit .zip, zip the correct folder, use specified domain name) First (add-to-list) activity: 13 pts broken down as followso 2 pts: Layout as specifiedo 2 pts: Correct use of strings.xmlo 2 pts: Buttons connected to methodso 3 pts: Functionality of button for adding a string to the listo 3 pts: Functionality of button for displaying the list (starting the second activity)o 1 pt: Appropriate putExtra() string Second (display-list) activity: 5 pts broken down as followso 3 pts: Display list with newline characters between stringso 1 pt: Allow scrollingo 1 pt: Provide up (back) button to return to first activity转自：http://ass.3daixie.com/2019011930482358.html