adding ProgressDialogBox for Downloading data

Author: RITUait

.idea/vcs.xml

@@ -81,6 +81,7 @@ private class fetchData extends AsyncTask<Void, Void, String> {
         @Override
         protected void onPreExecute() {
             super.onPreExecute();
+            UIUtil.startProgressDialog(MainActivity.this, "Downloading data....");
         }
 
         @Override
@@ -154,6 +155,7 @@ protected String doInBackground(Void... params) {
         protected void onPostExecute(String s) {
             super.onPostExecute(s);
             adapter.notifyDataSetChanged();
+            UIUtil.stopProgressDialog(MainActivity.this);
         }
     }
 

app/src/main/java/com/example/ritu/database1app/activity/MainActivity.java

@@ -0,0 +1,41 @@
+package com.example.ritu.database1app.activity;
+
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.util.Log;
+
+/**
+ * Created by ritu on 1/9/2018.
+ */
+//it has reusable code (class UIUtil )
+public class UIUtil {
+    private static ProgressDialog mProgressDialog;
+    private static Object mObject = new Object();
+
+    public static void startProgressDialog(Context context, String message) {
+        try {
+            synchronized (mObject) {
+                if (mProgressDialog == null) {
+                    mProgressDialog = ProgressDialog.show(context, "", message);
+                    mProgressDialog.setIndeterminate(true);
+                }
+            }
+        } catch (Exception e) {
+            Log.e("Exception", "startProgressDialog ------------------------------: " + e.toString());
+            e.printStackTrace();
+        }
+    }
+
+    public static void stopProgressDialog(Context context) {
+        try {
+            synchronized (mObject) {
+                if (mProgressDialog != null && mProgressDialog.isShowing()) {
+                    mProgressDialog.dismiss();
+                    mProgressDialog = null;
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}