Replaced AlertDialog with Snackbar while deleting items

Author: jainkuniya

source-code/app/src/main/java/org/buildmlearn/toolkit/activity/TemplateEditor.java

@@ -3,6 +3,9 @@
 import android.Manifest;
 import android.app.Dialog;
 import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -583,25 +586,19 @@ public boolean onOptionsItemSelected(MenuItem item) {
 
         switch (id) {
             case R.id.action_delete:
-
-                final AlertDialog dialog = new AlertDialog.Builder(this)
-                        .setTitle(R.string.dialog_delete_title)
-                        .setMessage(R.string.dialog_delete_msg)
-                        .setPositiveButton(R.string.dialog_yes, null)
-                        .setNegativeButton(R.string.dialog_no, null)
-                        .create();
-                dialog.show();
-
-                dialog.getButton(DialogInterface.BUTTON_POSITIVE).setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        dialog.dismiss();
-                        selectedTemplate.deleteItem(TemplateEditor.this, selectedPosition);
-                        selectedPosition = -1;
-                        restoreSelectedView();
-                    }
-                });
-
+                final int restorePosition = selectedPosition;
+                final Object object = selectedTemplate.deleteItem(TemplateEditor.this,selectedPosition);
+                selectedPosition = -1;
+                restoreSelectedView();
+                Snackbar.make(findViewById(R.id.relative_layout),
+                        R.string.snackbar_deleted_message,Snackbar.LENGTH_LONG)
+                        .setAction(R.string.snackbar_undo, new View.OnClickListener() {
+                            @Override
+                            public void onClick(View v) {
+                                selectedTemplate.restoreItem(TemplateEditor.this,restorePosition,object);
+                                Snackbar.make(v,R.string.snackbar_restored_message,Snackbar.LENGTH_LONG).show();
+                            }
+                        }).show();
                 break;
             case R.id.action_edit:
                 selectedTemplate.editItem(this, selectedPosition);