使用Tabs，Wifi和Gps

在第一个选项卡下动态生成3个选项卡我生成一个切换按钮，使用该按钮可以关闭GPS和WIFI
我为GPS和WIFI编写了java文件 . 我已经一次又一次地检查，但找不到任何错误 . 我已经在模拟器和android "Sony Arc mobile also."运行安装也顺利，当我尝试启动时出现问题 . 应用程序显示消息“ The application has stopped unexpectedly please try again ”我已经在堆栈溢出中引用了几乎所有查询，并且无法为我的场景获得任何可能的答案..我尝试删除应用程序中的GPS和WIFI文件并替换切换按钮使用TextView然后它的工作正常 .
包括我的代码，请验证它并帮助我的好友 .

Main.java包project.sow; import android.app.TabActivity; import android.content.Intent; import android.content.res.Resources; import android.os.Bundle; import android.widget.TabHost; public class Main扩展TabActivity {private TabHost tabHost; @Override public void onCreate（Bundle savedInstanceState）{try {super.onCreate（savedInstanceState）;的setContentView（R.layout.main）;资源res = getResources（）; //获取Drawables的资源对象tabHost =（TabHost）findViewById（android.R.id.tabhost）; //活动TabHost TabHost.TabSpec规范; //每个选项卡的可重复使用的TabSpec //为每个选项卡初始化TabSpec并将其添加到TabHost spec = tabHost.newTabSpec（“Start”） . setIndicator（“Start”，res.getDrawable（R.drawable.ic_sample））; spec.setContent（new Intent（this，Start.class））; tabHost.addTab（SPEC）; spec = tabHost.newTabSpec（“Info”） . setIndicator（“Info”，res.getDrawable（R.drawable.ic_sample））; spec.setContent（new Intent（） . setClass（this，Info.class））; tabHost.addTab（SPEC）;

spec = tabHost.newTabSpec("Update").setIndicator("Update",   res.getDrawable(R.drawable.ic_sample));             
    spec.setContent(new Intent(this, Update.class));  
    tabHost.addTab(spec);  

    tabHost.setCurrentTab(1);  
}catch(Exception e)  
{
    android.util.Log.i("PREFS",e.getMessage());  
} } }

Start.java包project.sow; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.IntentFilter; import android.location.LocationListener; import android.location.LocationManager; import android.location.LocationProvider; import android.net.wifi.WifiManager; import android.os.Bundle; import android.widget.TextView; import android.widget.Toast; import android.widget.ToggleButton; public class Start extends Activity {public WifiManager wifi;布尔状态;上下文背景; public TextView textStatus; public LocationManager locationManager; public LocationListener locationListener;公共BroadcastReceiver接收器; public LocationProvider locationProvider;

public void onCreate(Bundle savedInstanceState) {  
        try{   
        super.onCreate(savedInstanceState);           
        TextView textview = new TextView(this);  
        textview.setText("Toggle to On r Off the Application");  
        setContentView(textview);  
        ToggleButton btnonoff = new ToggleButton(this);  
        setContentView(btnonoff);  
        if(btnonoff.isChecked()){  
           status=true;  
            wifi.setWifiEnabled(true);  
            try{  
            // Setup WiFi  
            wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);  
            locationManager = (LocationManager)   getSystemService(Context.LOCATION_SERVICE);  
            if (receiver == null)  
                receiver = new WiFiFilter(this);                
            registerReceiver(receiver, new IntentFilter(  
            WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));  
            if (locationListener ==null ){locationListener=new gpsLocation(this);} 
            }  
            catch(Exception e){Toast.makeText(context, WIFI_SERVICE, Toast.LENGTH_LONG).show();}  
       }   
       else if(!btnonoff.isChecked()) {  
          status=false;    
           if(wifi.isWifiEnabled()){  
           wifi.setWifiEnabled(false);  
           locationManager.removeUpdates((LocationListener) this);  
           }  
            }               
        }  
        catch(Exception e)  
        {  
            android.util.Log.i("PREFS",e.getMessage());  
        }  
}     }

WifiFilter.java包project.sow; import java.util.List; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.net.wifi.ScanResult; import android.net.wifi.WifiManager; import android.util.Log; import android.widget.Toast;公共类WiFiFilter扩展BroadcastReceiver {private static final String TAG =“WiFiFilter”;开始; public WiFiFilter（Start start）{super（）; this.start =开始; } //准备隐藏的SSID并保存wifi配置供以后使用@Override public void onReceive（Context c，Intent intent）{List results = start.wifi.getScanResults（）;列出results2 = null; ScanResult filter = null; //过滤SSID for（ScanResult filterresult：results）{if（filterresult.SSID ==“VOLSBB”）} //检查信号等级（ScanResult result：results2）{if（filter == null） || WifiManager.compareSignalLevel（filter.level，result.level）<0）filter = result;尝试{WifiManager.ACTION_PICK_WIFI_NETWORK.equals（过滤器）; } catch（Exception e）{String res =“Exception：No network”; Toast.makeText（start，res，Toast.LENGTH_LONG）.show（）;}; } String message = String.format（“已连接到S0W”）; if（filter.SSID！= null）{// Toast.makeText（start，message，Toast.LENGTH_LONG）.show（）; Log.d（TAG，“onReceive（）message：”message）; }}}

gpsLocation.java

package project.sow; import project.sow.CustomWebView; import android.location.Criteria; import android.location.GpsStatus; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import project.sow.Start; public class gpsLocation实现LocationListener {Start sowWifigps; public Location currentBestLocation;公共场所位置; GpsStatus状态; CustomWebView webviewgps;双倍;双b; @SuppressWarnings（“unused”）private String bestProvider; // public LocationManager locationManager; public String provider1; public gpsLocation（Start sowWifigps）{super（）; this.sowWifigps = sowWifigps; // TODO自动生成的构造函数存根条件标准= new Criteria（）; // bestProvider = sowWifigps.locationManager.getBestProvider（criteria，false）; try {if（LocationManager.GPS_PROVIDER == null） else } catch（异常e）} @Override public void onLocationChanged（Locationlocation）{// TODO自动生成的方法stub sowWifigps.locationManager.requestLocationUpdates（provider1,12000,200，sowWifigps.locationListener）; } @Override public void onProviderDisabled（String provider）{// TODO自动生成的方法stub // provider = LocationManager.NETWORK_PROVIDER; currentBestLocation = sowWifigps.locationManager.getLastKnownLocation（provider1）;一个= currentBestLocation.getLatitude（）; B = currentBestLocation.getLongitude（）; webviewgps.loadUrl（“http：//localhost/mobile/default_mobile.php？lat =”a“＆long =”b）; //更改为站点名称} @Override public void onProviderEnabled（String provider）{// TODO自动生成的方法stub sowWifigps.locationManager.requestLocationUpdates（provider1,12000,200，sowWifigps.locationListener）;一个= currentBestLocation.getLatitude（）; B = currentBestLocation.getLongitude（）; webviewgps.loadUrl（“http：//localhost/mobile/default_mobile.php？lat =”a“＆long =”b）; //更改为站点名称} @Override public void onStatusChanged（String provider，int status，Bundle extras）{// TODO自动生成的方法stub sowWifigps.locationListener.onLocationChanged（location）; }}

Am presenting here second Tab and other resembles this one.So am omitting it.

Info.java

package project.sow; import android.app.Activity; import android.os.Bundle; public class Info extends Activity {public void onCreate（Bundle savedInstanceState）{super.onCreate（savedInstanceState）; } @Override protected void onResume（）{CustomWebView webView = new CustomWebView（this）; webView.loadUrl（ “http://www.google.com/?s=Info”）;的setContentView（web视图）; super.onResume（）; }}

CustomWebView.java包project.sow; import android.app.ProgressDialog; import android.content.Context; import android.graphics.Bitmap; import android.view.View; import android.webkit.WebView; import android.webkit.WebViewClient;公共类CustomWebView扩展WebView {private ProgressDialog pgBar = null; @SuppressWarnings（“unused”）私有上下文ctx; public CustomWebView（Context context）{super（context）; this.clearCache（真）; this.clearFormData（）; this.clearHistory（）; this.getSettings（）setJavaScriptEnabled（真） . this.getSettings（）setUserAgentString（空） . this.requestFocus（View.FOCUS_DOWN）; this.setWebViewClient（new CustomWebView.CustomWebViewClient（））; this.pgBar = new ProgressDialog（context）; this.pgBar.setMessage（ “载入中...”）; ctx = context;私有类CustomWebViewClient扩展了WebViewClient {@Override public void onPageStarted（WebView视图，String url，Bitmap favicon）{super.onPageStarted（view，url，favicon）; if（！CustomWebView.this.pgBar.isShowing（））{CustomWebView.this.pgBar.show（）; @Override public void onPageFinished（WebView view，String url）{super.onPageFinished（view，url）; if（CustomWebView.this.pgBar.isShowing（））{CustomWebView.this.pgBar.dismiss（）; @Override public boolean shouldOverrideUrlLoading（WebView view，String url）{try {view.loadUrl（url）; } catch（Exception ex）{}返回true; }}}

main.xml中

<?xml version="1.0" encoding="utf-8"?>  
<TabHost android:layout_width="fill_parent"  
    android:layout_height="fill_parent" xmlns:android="http://schemas.android.com  /apk/res/android" android:id="@android:id/tabhost" android:background="#cabfa9">  
    <LinearLayout android:id="@+id/LinearLayout01"  
        android:orientation="vertical" android:layout_height="fill_parent"  
        android:layout_width="fill_parent">  
<TabWidget android:id="@android:id/tabs" android:layout_height="wrap_content"   android:layout_width="fill_parent"   android:background="#1b3b5b" ></TabWidget>  
        <FrameLayout android:id="@android:id/tabcontent"   android:layout_height="fill_parent" android:layout_width="fill_parent"   android:scrollbars="horizontal" android:background="#cabfa9">           
    </FrameLayout>  
    </LinearLayout>  
</TabHost>

style.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="tabText" parent="@android:style/Theme.Black">        
        <item name="android:textColor">#FFFFFF</item>
        <item name="android:textSize">10dip</item>        
    </style>    

</resources>

`

ic_sample

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- When selected, use grey -->
    <item android:drawable="@drawable/icon1"
          android:state_selected="true" />
    <!-- When not selected, use white-->
    <item android:drawable="@drawable/icon2" />
</selector>

我在清单文件中添加了以下权限

<uses-permission android:name="android.permission.INTERNET"></uses-permission> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />