Save instance state on grade detail activity in edit mode

Author: tilmanginzel

app/src/main/java/de/mygrades/view/activity/GradeDetailedActivity.java

@@ -60,6 +60,7 @@ public class GradeDetailedActivity extends AppCompatActivity {
     private static final String GRADE_HASH_STATE = "grade_hash";
     private static final String EDIT_MODE_ENABLED_STATE = "edit_mode_enabled";
     private static final String ADD_NEW_GRADE_ENTRY = "add_new_grade_entry";
+    private static final String EDIT_HELPER_STATE = "edit_helper_state";
 
     // views
     private LinearLayout llRootView; // used to show snackbar
@@ -88,6 +89,7 @@ public class GradeDetailedActivity extends AppCompatActivity {
     private boolean receivedGradeEntryEvent;
     private boolean editModeEnabled;
     private boolean addNewGradeEntry;
+    private Bundle editHelperState;
 
     // snackbar listener
     private View.OnClickListener tryAgainListener;
@@ -280,6 +282,9 @@ public void onEventMainThread(GradeEntryEvent gradeEntryEvent) {
         editHelper.setSemesterToNumberMap(gradeEntryEvent.getSemesterToSemesterNumberMap());
         editHelper.init();
         editHelper.updateValues();
+        if (editModeEnabled) {
+            editHelper.restoreInstanceState(editHelperState);
+        }
 
         if (addNewGradeEntry) {
             editHelper.enableEditMode(true);
@@ -417,6 +422,7 @@ protected void onSaveInstanceState(Bundle outState) {
         outState.putString(GRADE_HASH_STATE, gradeHash);
         outState.putBoolean(EDIT_MODE_ENABLED_STATE, editModeEnabled);
         outState.putBoolean(ADD_NEW_GRADE_ENTRY, addNewGradeEntry);
+        outState.putBundle(EDIT_HELPER_STATE, editHelper.getInstanceState());
     }
 
     @Override
@@ -428,6 +434,7 @@ protected void onRestoreInstanceState(Bundle savedInstanceState) {
         ptrHeader.restoreInstanceState(savedInstanceState, ptrFrame);
         editModeEnabled = savedInstanceState.getBoolean(EDIT_MODE_ENABLED_STATE);
         addNewGradeEntry = savedInstanceState.getBoolean(ADD_NEW_GRADE_ENTRY);
+        editHelperState = savedInstanceState.getBundle(EDIT_HELPER_STATE);
     }
 
     private class MyValueFormatter implements ValueFormatter {

app/src/main/java/de/mygrades/view/activity/GradeDetailedActivityEditHelper.java

@@ -1,6 +1,7 @@
 package de.mygrades.view.activity;
 
 import android.app.Activity;
+import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
@@ -25,6 +26,19 @@
 public class GradeDetailedActivityEditHelper {
     private static final String TAG = GradeDetailedActivityEditHelper.class.getSimpleName();
 
+    // instance state
+    public static final String ET_EXAM_ID_TEXT = "et_exam_id_text";
+    public static final String ET_STATE_TEXT = "et_state_text";
+    public static final String ET_CREDIT_POINTS_TEXT = "et_credit_points_text";
+    public static final String ET_GRADE_TEXT = "et_grade_text";
+    public static final String ET_ANNOTATION_TEXT = "et_annotation_text";
+    public static final String ET_EXAM_DATE_TEXT = "et_exam_date_text";
+    public static final String ET_TESTER_TEXT = "et_tester_text";
+    public static final String ET_WEIGHT_TEXT = "et_weight_text";
+    public static final String ET_NAME_TEXT = "et_name_text";
+    public static final String SP_ATTEMPT_POSITION = "sp_attempt_position";
+    public static final String SP_SEMESTER_POSITION = "sp_semester_position";
+
     private Activity activity;
     private MainServiceHelper mainServiceHelper;
     private boolean editModeEnabled;
@@ -718,6 +732,49 @@ private Double stringToDouble(String s) {
         return null;
     }
 
+    /**
+     * Get the instance state for all edit texts and spinner.
+     *
+     * @return instance state as Bundle
+     */
+    public Bundle getInstanceState() {
+        Bundle state = new Bundle();
+        state.putString(ET_EXAM_ID_TEXT, etExamId.getText().toString());
+        state.putString(ET_STATE_TEXT, etState.getText().toString());
+        state.putString(ET_CREDIT_POINTS_TEXT, etCreditPoints.getText().toString());
+        state.putString(ET_GRADE_TEXT, etGrade.getText().toString());
+        state.putString(ET_ANNOTATION_TEXT, etAnnotation.getText().toString());
+        state.putString(ET_EXAM_DATE_TEXT, etExamDate.getText().toString());
+        state.putString(ET_TESTER_TEXT, etTester.getText().toString());
+        state.putString(ET_WEIGHT_TEXT, etWeight.getText().toString());
+        state.putString(ET_NAME_TEXT, etName.getText().toString());
+        state.putInt(SP_ATTEMPT_POSITION, spAttempt.getSelectedItemPosition());
+        state.putInt(SP_SEMESTER_POSITION, spSemester.getSelectedItemPosition());
+
+        return state;
+    }
+
+    /**
+     * Restore the instance state for all edit texts and spinner.
+     *
+     * @param savedState Bundle
+     */
+    public void restoreInstanceState(Bundle savedState) {
+        if (savedState == null) return;
+
+        etExamId.setText(savedState.getString(ET_EXAM_ID_TEXT));
+        etState.setText(savedState.getString(ET_STATE_TEXT));
+        etCreditPoints.setText(savedState.getString(ET_CREDIT_POINTS_TEXT));
+        etGrade.setText(savedState.getString(ET_GRADE_TEXT));
+        etAnnotation.setText(savedState.getString(ET_ANNOTATION_TEXT));
+        etExamDate.setText(savedState.getString(ET_EXAM_DATE_TEXT));
+        etTester.setText(savedState.getString(ET_TESTER_TEXT));
+        etWeight.setText(savedState.getString(ET_WEIGHT_TEXT));
+        etName.setText(savedState.getString(ET_NAME_TEXT));
+        spAttempt.setSelection(savedState.getInt(SP_ATTEMPT_POSITION));
+        spSemester.setSelection(savedState.getInt(SP_SEMESTER_POSITION));
+    }
+
     public void setGradeEntry(GradeEntry gradeEntry) {
         this.gradeEntry = gradeEntry;
     }