Lab04

Creating a Webview

Create a branch called webview
- git checkout -b webview
In MainActivity.java add the following lines of code inside the onCreate() method:

WebView webview = new WebView(this);
setContentView(webview);

Load any URL of your choice (that's appropriate) by calling webview.loadURL("yourURL.com")
Run on your Android device or emulator. Challenge: How would you go to your Webview from MainActivity, i.e. Launch from a button click?
Commit and push into Github
- git add .
- git commit -m "webview lab"
- git push origin webview

Once your webview branch is pushed up to Github, checkout branch master
- git checkout master
Create a branch called urlconnection
- git checkout -b urlconnection
In MainActivity.java create a method that passes in a String and returns a String
- The parameter will (eventually) be the URL https://jsonplaceholder.typicode.com/users
- The resulting String will be a JSON list of users
- Inside the method, create a URL with the input string
- Open a URLConnection with the call openConnection()
- Create an InputStreamReader and channel through a BufferedReader as discussed in class
- The output of the BufferedReader.readLine() will be a String. Put that in a variable
- Print the String with Log.i() and check the contents
- Compare that with typing the URL into a web browser Challenge: Use past JsonUtils and edit create a JSONObject
Commit and push into Github
- git add .
- git commit -m "url connection lab"
- git push origin urlconnection

Once your urlconnection branch is pushed to Github create a branch called asyncTask
- git checkout -b asyncTask
Create a new class that extends AsyncTask<String, Void, String> and @Override the doInBackground() and onPostExecute()
Create a TextView element on your UI and pass that in the constructor to your AsyncTask class
In MainActivity.java create an instance of your AsyncTask class
Move your URL code from last lab to the doInBackground() task
In the onPostExecute() set your TextView to a subString of the json that is returned. The subString should be from 10-23
Commit and push into Gitub
- git add .
- git commit -m "async task"
- git push origin async