press back twice to exit on Android

Author: DeepAQ

platforms/android/AndroidManifest.xml

@@ -0,0 +1,23 @@
+<?xml version='1.0' encoding='utf-8'?>
+<manifest android:hardwareAccelerated="true" android:versionCode="10000" android:versionName="1.0.0" package="cn.imaq.missionhelper" xmlns:android="http://schemas.android.com/apk/res/android">
+    <supports-screens android:anyDensity="true" android:largeScreens="true" android:normalScreens="true" android:resizeable="true" android:smallScreens="true" android:xlargeScreens="true" />
+    <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="22" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <application android:hardwareAccelerated="true" android:icon="@drawable/icon" android:label="@string/app_name" android:supportsRtl="true">
+        <activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale" android:label="@string/activity_name" android:launchMode="singleTop" android:name="MainActivity" android:theme="@android:style/Theme.DeviceDefault.NoActionBar" android:windowSoftInputMode="adjustResize">
+            <intent-filter android:label="@string/launcher_name">
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <service android:name="com.amap.api.location.APSService" />
+        <meta-data android:name="com.amap.api.v2.apikey" android:value="92f2a8906b924832b9d1e3994453aadf" />
+    </application>
+    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
+</manifest>

platforms/android/src/cn/imaq/missionhelper/MainActivity.java

@@ -0,0 +1,66 @@
+/*
+       Licensed to the Apache Software Foundation (ASF) under one
+       or more contributor license agreements.  See the NOTICE file
+       distributed with this work for additional information
+       regarding copyright ownership.  The ASF licenses this file
+       to you under the Apache License, Version 2.0 (the
+       "License"); you may not use this file except in compliance
+       with the License.  You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+       Unless required by applicable law or agreed to in writing,
+       software distributed under the License is distributed on an
+       "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+       KIND, either express or implied.  See the License for the
+       specific language governing permissions and limitations
+       under the License.
+ */
+
+package cn.imaq.missionhelper;
+
+import android.os.Bundle;
+import android.provider.Settings;
+import android.webkit.WebView;
+import android.widget.Toast;
+
+import com.amap.api.location.AMapLocation;
+import com.amap.api.location.AMapLocationClient;
+import com.amap.api.location.AMapLocationClientOption;
+import com.amap.api.location.AMapLocationListener;
+
+import org.apache.cordova.*;
+
+public class MainActivity extends CordovaActivity
+{
+    private AMapLocationClient locationClient = null;
+    private long backTime = 0;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState)
+    {
+        super.onCreate(savedInstanceState);
+        // Set by <content src="index.html" /> in config.xml
+        loadUrl(launchUrl);
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (locationClient != null) {
+            locationClient.stopLocation();
+            locationClient.onDestroy();
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        long time = System.currentTimeMillis();
+        if (time - backTime > 2000) {
+            Toast.makeText(getApplicationContext(), "Press again to exit", Toast.LENGTH_SHORT).show();
+            backTime = time;
+        } else {
+            System.exit(0);
+        }
+    }
+}