Refactoring

app/src/main/java/eu/faircode/email/FragmentBase.java

@@ -0,0 +1,139 @@
+package eu.faircode.email;
+
+/*
+    This file is part of FairEmail.
+
+    FairEmail is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    FairEmail is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FairEmail.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2018-2019 by Marcel Bokhorst (M66B)
+*/
+
+import android.content.Context;
+import android.content.res.Configuration;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.inputmethod.InputMethodManager;
+
+import androidx.appcompat.app.ActionBar;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.fragment.app.Fragment;
+import androidx.lifecycle.Lifecycle;
+
+public class FragmentBase extends Fragment {
+    private String subtitle = " ";
+    private boolean finish = false;
+
+    protected void setSubtitle(int resid) {
+        setSubtitle(getString(resid));
+    }
+
+    protected void setSubtitle(String subtitle) {
+        this.subtitle = subtitle;
+        updateSubtitle();
+    }
+
+    protected void finish() {
+        if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+            getFragmentManager().popBackStack();
+        else
+            finish = true;
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        Log.i("Save instance " + this);
+        super.onSaveInstanceState(outState);
+        outState.putString("subtitle", subtitle);
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        Log.i("Create " + this + " saved=" + (savedInstanceState != null));
+        super.onCreate(savedInstanceState);
+        if (savedInstanceState != null)
+            subtitle = savedInstanceState.getString("subtitle");
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        Log.i("Create view " + this);
+        return super.onCreateView(inflater, container, savedInstanceState);
+    }
+
+    @Override
+    public void onActivityCreated(Bundle savedInstanceState) {
+        Log.i("Activity " + this + " saved=" + (savedInstanceState != null));
+        super.onActivityCreated(savedInstanceState);
+    }
+
+    @Override
+    public void onResume() {
+        Log.i("Resume " + this);
+        super.onResume();
+        updateSubtitle();
+        if (finish) {
+            getFragmentManager().popBackStack();
+            finish = false;
+        }
+    }
+
+    @Override
+    public void onPause() {
+        Log.i("Pause " + this);
+        super.onPause();
+    }
+
+    @Override
+    public void onDetach() {
+        super.onDetach();
+
+        InputMethodManager im = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
+        View focused = getActivity().getCurrentFocus();
+        if (focused != null)
+            im.hideSoftInputFromWindow(focused.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
+    }
+
+    @Override
+    public void onConfigurationChanged(Configuration newConfig) {
+        Log.i("Config " + this);
+        super.onConfigurationChanged(newConfig);
+    }
+
+    @Override
+    public void onDestroy() {
+        Log.i("Destroy " + this);
+        super.onDestroy();
+    }
+
+    @Override
+    public void setHasOptionsMenu(boolean hasMenu) {
+        super.setHasOptionsMenu(!isPane() && hasMenu);
+    }
+
+    private void updateSubtitle() {
+        AppCompatActivity activity = (AppCompatActivity) getActivity();
+        if (activity != null && !isPane()) {
+            ActionBar actionbar = activity.getSupportActionBar();
+            if (actionbar != null)
+                actionbar.setSubtitle(subtitle);
+        }
+    }
+
+    private boolean isPane() {
+        Bundle args = getArguments();
+        return (args != null && args.getBoolean("pane"));
+    }
+}