ComprehensionTemplate time bug fixed.

Author: free4murad

source-code/app/src/main/java/org/buildmlearn/toolkit/templates/ComprehensionTemplate.java

@@ -67,7 +67,7 @@ private static boolean validated( Context context, EditText title, EditText pass
         }else if (timerText.length() > 9) {
             timer.setError(context.getString(R.string.comprehension_template_timer_correct_hint));
             return false;
-        }else if ("0".equals(timerText)) {
+        }else if (timerText.matches("[0]+")) {
             timer.setError((context.getString(R.string.time_zero_error)));
             return false;
         } else if ("".equals(timerText)) {
@@ -253,7 +253,7 @@ public void onClick(View v) {
                         option.setText("");
                         continue;
                     }
-                    if (option.getText().toString()!= null && "".equals(option.getText().toString().trim())) {
+                    if ("".equals(option.getText().toString().trim())) {
                         option.getText().clear();
                         option.setError(activity.getString(R.string.comprehension_template_valid_option));
                         isValidated = false;
@@ -484,7 +484,7 @@ public void onClick(View v) {
                             option.setText("");
                             continue;
                         }
-                        if (option.getText().toString()!= null && "".equals(option.getText().toString().trim())) {
+                        if ("".equals(option.getText().toString().trim())) {
                             option.getText().clear();
                             option.setError(activity.getString(R.string.comprehension_template_valid_option));
                             isValidated = false;