Briefly explain the purpose of  the following two lines of code as used in android programming               usrnm=(EditText) findViewById(R.id.edtusername);     usrnm=(EditText) findViewById(R.id.edtpassword);

Write the code for an application, using flutter components, to get product data from a web server and then show the products using ListView. You need to deal with JSON file that describe the products by name, price, description, and image. Requested products are USB cable, Wireless Mouse, microSDXC 128GB, and TB-Link AC750. Note suppose the information about these products and continue writing the code and specify all steps to get the ListView of these products on the mobile application.

Open the application in the folder under the coursework. Open the HTML file and notice that an Invoice Date field has been added. Then, open the HTML file and notice that it includes a getFormattedDate() function that formats the Date object that’s passed to it in MM/DD/YYYY format and then returns the date string. Start the application, enter a subtotal, and click the Calculate button. Note that nothing is displayed in the Invoice Date field. In the click() event handler for the Calculate button, add code that gets the current date and formats it using the getFormattedDate() function. Then, add code that provides a default value of the formatted current date for the invoice date. Note that if an invoice date is entered, that date isn’t validated. Add code that sets the value of the Invoice Date field. If you’ve done this right, the application should display the current date when you click the Calculate button without entering anything in the Invoice Date field.   <!DOCTYPE…