download dialog

app/src/main/java/com/udacity/gradle/builditbigger/DownloadDialogFragment.java

@@ -0,0 +1,45 @@
+package com.udacity.gradle.builditbigger;
+
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v4.app.DialogFragment;
+
+import net.headlezz.jokesbackend.myApi.model.Joke;
+
+public class DownloadDialogFragment extends DialogFragment {
+
+    public static final String TAG = DownloadDialogFragment.class.getSimpleName();
+
+    @NonNull
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        ProgressDialog dialog = new ProgressDialog(getContext());
+        dialog.setCancelable(false);
+        dialog.setCanceledOnTouchOutside(false);
+        dialog.setIndeterminate(true);
+        dialog.setMessage(getContext().getString(R.string.dialog_loading));
+        return dialog;
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        MyBus.getInstance().register(this);
+    }
+
+    @Override
+    public void onPause() {
+        MyBus.getInstance().unregister(this);
+        super.onPause();
+    }
+
+    public void onEvent(Joke joke) {
+        dismiss();
+    }
+
+    public void onEvent(JokeLoaderTask.JokeDownloadException e) {
+        dismiss();
+    }
+}

app/src/main/java/com/udacity/gradle/builditbigger/MainActivityFragment.java

@@ -44,19 +44,26 @@ public abstract class MainActivityFragment extends Fragment implements View.OnCl
      * cancels old downloads if theres already a running one
      */
     private void downloadNewJoke() {
-        if(mJokeLoaderTask != null) {
-            mJokeLoaderTask.cancel(true);
-        }
         mJokeLoaderTask = new JokeLoaderTask();
         mJokeLoaderTask.execute();
+        DownloadDialogFragment frag = new DownloadDialogFragment();
+        frag.show(getFragmentManager(), DownloadDialogFragment.TAG);
     }
 
+    /**
+     * Shows the joke activity with the given joke
+     * @param joke Joke to show
+     */
     public void onEvent(Joke joke) {
         Intent i = new Intent(getContext(), JokePresenterActivity.class);
         i.putExtra(JokePresenterActivity.BUNDLE_ARG_JOKE, joke.getJoke());
         startActivity(i);
     }
 
+    /**
+     * Prints an error message on the screen if we have a problem with the download
+     * @param e Exception
+     */
     public void onEvent(JokeLoaderTask.JokeDownloadException e) {
         if (getActivity() != null)
             Snackbar.make(getActivity().findViewById(android.R.id.content), R.string.joke_download_error, Snackbar.LENGTH_LONG)

app/src/main/res/values/strings.xml

@@ -6,4 +6,5 @@
     <string name="banner_ad_unit_id">ca-app-pub-3940256099942544/6300978111</string>
     <string name="joke_download_error">Failed to load joke</string>
     <string name="retry">Retry</string>
+    <string name="dialog_loading">Loading ...</string>
 </resources>