44import android .os .Bundle ;
55import android .os .Handler ;
66import android .os .Looper ;
7- import android .view .Menu ;
7+ import android .text .TextUtils ;
8+ import android .view .View ;
89import android .widget .Toast ;
910
11+ import androidx .activity .OnBackPressedCallback ;
1012import androidx .annotation .NonNull ;
1113import androidx .annotation .Nullable ;
1214import androidx .appcompat .app .AlertDialog ;
1315import androidx .fragment .app .Fragment ;
16+ import androidx .navigation .Navigation ;
1417
15- import io .agora .api .example .R ;
16-
17- public class BaseFragment extends Fragment
18- {
18+ /**
19+ * The type Base fragment.
20+ */
21+ public class BaseFragment extends Fragment {
22+ /**
23+ * The Handler.
24+ */
1925 protected Handler handler ;
2026 private AlertDialog mAlertDialog ;
27+ private String mAlertMessage ;
28+ private final OnBackPressedCallback onBackPressedCallback = new OnBackPressedCallback (false ) {
29+ @ Override
30+ public void handleOnBackPressed () {
31+ onBackPressed ();
32+ }
33+ };
2134
2235 @ Override
23- public void onCreate (@ Nullable Bundle savedInstanceState )
24- {
36+ public void onCreate (@ Nullable Bundle savedInstanceState ) {
2537 super .onCreate (savedInstanceState );
2638 handler = new Handler (Looper .getMainLooper ());
39+ requireActivity ().getOnBackPressedDispatcher ().addCallback (onBackPressedCallback );
40+ }
41+
42+ @ Override
43+ public void onAttach (@ NonNull Context context ) {
44+ super .onAttach (context );
45+ onBackPressedCallback .setEnabled (true );
46+ }
47+
48+ @ Override
49+ public void onDetach () {
50+ super .onDetach ();
51+ onBackPressedCallback .setEnabled (false );
2752 }
2853
54+ /**
55+ * Show alert.
56+ *
57+ * @param message the message
58+ */
2959 protected void showAlert (String message ) {
60+ this .showAlert (message , true );
61+ }
3062
63+ /**
64+ * Show alert.
65+ *
66+ * @param message the message
67+ * @param showRepeatMsg the show repeat msg
68+ */
69+ protected void showAlert (String message , boolean showRepeatMsg ) {
3170 runOnUIThread (() -> {
3271 Context context = getContext ();
33- if (context == null ){
72+ if (context == null ) {
3473 return ;
3574 }
3675 if (mAlertDialog == null ) {
3776 mAlertDialog = new AlertDialog .Builder (context ).setTitle ("Tips" )
3877 .setPositiveButton ("OK" , (dialog , which ) -> dialog .dismiss ())
3978 .create ();
4079 }
80+ if (!showRepeatMsg && !TextUtils .isEmpty (mAlertMessage ) && mAlertMessage .equals (message )) {
81+ return ;
82+ }
83+ mAlertMessage = message ;
4184 mAlertDialog .setMessage (message );
4285 mAlertDialog .show ();
4386 });
4487 }
4588
46- protected final void showLongToast (final String msg )
47- {
89+ /**
90+ * Reset alert.
91+ */
92+ protected void resetAlert () {
93+ runOnUIThread (() -> mAlertMessage = "" );
94+ }
95+
96+ /**
97+ * Show long toast.
98+ *
99+ * @param msg the msg
100+ */
101+ protected final void showLongToast (final String msg ) {
48102 runOnUIThread (() -> {
49103 Context context = getContext ();
50- if (context == null ){
104+ if (context == null ) {
51105 return ;
52106 }
53107 Toast .makeText (context , msg , Toast .LENGTH_LONG ).show ();
54108 });
55109 }
56110
57- protected final void showShortToast (final String msg )
58- {
111+ /**
112+ * Show short toast.
113+ *
114+ * @param msg the msg
115+ */
116+ protected final void showShortToast (final String msg ) {
59117 runOnUIThread (() -> {
60118 Context context = getContext ();
61- if (context == null ){
119+ if (context == null ) {
62120 return ;
63121 }
64122 Toast .makeText (context , msg , Toast .LENGTH_SHORT ).show ();
65123 });
66124 }
67125
68- protected final void runOnUIThread (Runnable runnable ){
126+ /**
127+ * Run on ui thread.
128+ *
129+ * @param runnable the runnable
130+ */
131+ protected final void runOnUIThread (Runnable runnable ) {
69132 this .runOnUIThread (runnable , 0 );
70133 }
71134
72- protected final void runOnUIThread (Runnable runnable , long delay ){
73- if (handler != null && runnable != null && getContext () != null ){
135+ /**
136+ * Run on ui thread.
137+ *
138+ * @param runnable the runnable
139+ * @param delay the delay
140+ */
141+ protected final void runOnUIThread (Runnable runnable , long delay ) {
142+ if (handler != null && runnable != null && getContext () != null ) {
74143 if (delay <= 0 && handler .getLooper ().getThread () == Thread .currentThread ()) {
75144 runnable .run ();
76- }else {
145+ } else {
77146 handler .postDelayed (() -> {
78- if (getContext () != null ){
147+ if (getContext () != null ) {
79148 runnable .run ();
80149 }
81150 }, delay );
@@ -87,15 +156,19 @@ protected final void runOnUIThread(Runnable runnable, long delay){
87156 public void onDestroy () {
88157 super .onDestroy ();
89158 handler .removeCallbacksAndMessages (null );
90- if (mAlertDialog != null ){
159+ if (mAlertDialog != null ) {
91160 mAlertDialog .dismiss ();
92161 mAlertDialog = null ;
93162 }
94163 }
95164
96- @ Override
97- public void onPrepareOptionsMenu (@ NonNull Menu menu ) {
98- super .onPrepareOptionsMenu (menu );
99- menu .setGroupVisible (R .id .main_setting_group , false );
165+ /**
166+ * On back pressed.
167+ */
168+ protected void onBackPressed () {
169+ View view = getView ();
170+ if (view != null ) {
171+ Navigation .findNavController (view ).navigateUp ();
172+ }
100173 }
101174}
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