lib/android/NitActivity.java

   1 /* This file is part of NIT ( http://www.nitlanguage.org ).
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at
   6  *
   7  *       http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 package nit.app;
  17
  18 import android.app.Activity;
  19 import android.os.Bundle;
  20
  21 /*
  22  * Entry point to Nit applications on Android, redirect most calls to Nit
  23  */
  24 public class NitActivity extends Activity {
  25
  26         // Nit activity associated to `this`
  27         protected int nitActivity = 0;
  28
  29         /*
  30          * Calls to Nit or to the C framework
  31          */
  32
  33         static {
  34                 System.loadLibrary("main");
  35         }
  36
  37         /*
  38          * Callbacks to Nit through C
  39          */
  40         protected native int nitRegisterActivity();
  41         protected native void nitOnCreate(int activity, Bundle savedInstanceState);
  42         protected native void nitOnStart(int activity);
  43         protected native void nitOnRestart(int activity);
  44         protected native void nitOnResume(int activity);
  45         protected native void nitOnPause(int activity);
  46         protected native void nitOnStop(int activity);
  47         protected native void nitOnDestroy(int activity);
  48         protected native void nitOnSaveInstanceState(int activity, Bundle savedInstanceState);
  49         protected native void nitOnRestoreInstanceState(int activity, Bundle savedInstanceState);
  50
  51         /*
  52          * Implementation of OS callbacks
  53          */
  54
  55         @Override
  56         public void onCreate(Bundle savedInstanceState) {
  57                 super.onCreate(savedInstanceState);
  58
  59                 nitActivity = nitRegisterActivity();
  60
  61                 nitOnCreate(nitActivity, savedInstanceState);
  62         }
  63
  64         @Override
  65         protected void onStart() {
  66                 super.onStart();
  67                 nitOnStart(nitActivity);
  68         }
  69
  70         @Override
  71         protected void onRestart() {
  72                 super.onRestart();
  73                 nitOnRestart(nitActivity);
  74         }
  75
  76         @Override
  77         protected void onResume() {
  78                 super.onResume();
  79                 nitOnResume(nitActivity);
  80         }
  81
  82         @Override
  83         protected void onPause() {
  84                 super.onPause();
  85                 nitOnPause(nitActivity);
  86         }
  87
  88         @Override
  89         protected void onStop() {
  90                 super.onStop();
  91                 nitOnStop(nitActivity);
  92         }
  93
  94         @Override
  95         protected void onDestroy() {
  96                 super.onDestroy();
  97                 nitOnDestroy(nitActivity);
  98         }
  99
 100         @Override
 101         public void onSaveInstanceState(Bundle savedInstanceState) {
 102                 super.onSaveInstanceState(savedInstanceState);
 103                 nitOnSaveInstanceState(nitActivity, savedInstanceState);
 104         }
 105
 106         @Override
 107         public void onRestoreInstanceState(Bundle savedInstanceState) {
 108                 super.onRestoreInstanceState(savedInstanceState);
 109                 nitOnRestoreInstanceState(nitActivity, savedInstanceState);
 110         }
 111 }