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android中检測网络连接状态简单总结

相应差点儿没有不跟网络打交道的android应用,那么在实际中就需求检測手机是否有网络连接。甚至须要推断是何种方式连接,这样能给用户带来更好的体验和一些使用指导,以下给出一些经常使用的推断。假设要知道是否有网络、以及是採用wifi连接的还是3G连接的。调用以下相应方法模型就OK了。代码例如以下:
TestNetworkActivity:
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package com.home.testnetwork; 
   
import java.util.List; 
   
import android.app.Activity; 
import android.content.Context; 
import android.location.LocationManager; 
import android.net.ConnectivityManager; 
import android.net.NetworkInfo; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
   
public class TestNetworkActivity extends Activity implements OnClickListener { 
     private Button checkBtn; 
     private EditText netText; 
     private EditText wifiText; 
     private EditText net3gText; 
     private EditText gpsText; 
   
     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
         super .onCreate(savedInstanceState); 
         setContentView(R.layout.main); 
         checkBtn = (Button) findViewById(R.id.main_btn_check); 
         checkBtn.setOnClickListener( this ); 
         wifiText = (EditText) findViewById(R.id.main_et_wifi); 
         net3gText = (EditText) findViewById(R.id.main_et_3g); 
         gpsText = (EditText) findViewById(R.id.main_et_GPS); 
         netText = (EditText) findViewById(R.id.main_et_net); 
     } 
   
     /**
      * 检測网络是否连接
      * 
      * @return
      */ 
     private boolean isNetConnected() { 
         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
         if (cm != null ) { 
             NetworkInfo[] infos = cm.getAllNetworkInfo(); 
             if (infos != null ) { 
                 for (NetworkInfo ni : infos) { 
                     if (ni.isConnected()) { 
                         return true ; 
                     } 
                 } 
             } 
         } 
         return false ; 
     } 
   
     /**
      * 检測wifi是否连接
      * 
      * @return
      */ 
     private boolean isWifiConnected() { 
         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
         if (cm != null ) { 
             NetworkInfo networkInfo = cm.getActiveNetworkInfo(); 
             if (networkInfo != null 
                     && networkInfo.getType() == ConnectivityManager.TYPE_WIFI) { 
                 return true ; 
             } 
         } 
         return false ; 
     } 
   
     /**
      * 检測3G是否连接
      * 
      * @return
      */ 
     private boolean is3gConnected() { 
         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 
         if (cm != null ) { 
             NetworkInfo networkInfo = cm.getActiveNetworkInfo(); 
             if (networkInfo != null 
                     && networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) { 
                 return true ; 
             } 
         } 
         return false ; 
     } 
   
     /**
      * 检測GPS是否打开
      * 
      * @return
      */ 
     private boolean isGpsEnabled() { 
         LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
         List<String> accessibleProviders = lm.getProviders( true ); 
         for (String name : accessibleProviders) { 
             if ( "gps" .equals(name)) { 
                 return true ; 
             } 
         } 
         return false ; 
     } 
   
     @Override 
     public void onClick(View v) { 
         if (v == checkBtn) { 
             netText.setText(isNetConnected() + "" ); 
             wifiText.setText(isWifiConnected() + "" ); 
             net3gText.setText(is3gConnected() + "" ); 
             gpsText.setText(isGpsEnabled() + "" ); 
         } 
     } 
} 

 

 
布局xml:
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<LinearLayout xmlns:android= "http://schemas.android.com/apk/res/android" 
     android:layout_width= "match_parent" 
     android:layout_height= "match_parent" 
     android:orientation= "vertical" > 
   
     <Button 
         android:id= "@+id/main_btn_check" 
         android:layout_width= "match_parent" 
         android:layout_height= "wrap_content" 
         android:text= "检測网络" /> 
   
     <LinearLayout 
         android:layout_width= "match_parent" 
         android:layout_height= "wrap_content" > 
   
         <TextView 
             android:layout_width= "wrap_content" 
             android:layout_height= "wrap_content" 
             android:text= "网络是否连接:" /> 
   
         <EditText 
             android:id= "@+id/main_et_net" 
             android:layout_width= "match_parent" 
             android:layout_height= "wrap_content" 
             android:layout_marginLeft= "10dp" 
             android:enabled= "false" /> 
     </LinearLayout> 
   
     <LinearLayout 
         android:layout_width= "match_parent" 
         android:layout_height= "wrap_content" > 
   
         <TextView 
             android:layout_width= "wrap_content" 
             android:layout_height= "wrap_content" 
             android:text= "wifi是否连接:" /> 
   
         <EditText 
             android:id= "@+id/main_et_wifi" 
             android:layout_width= "match_parent" 
             android:layout_height= "wrap_content" 
             android:layout_marginLeft= "10dp" 
             android:enabled= "false" /> 
     </LinearLayout> 
   
     <LinearLayout 
         android:layout_width= "match_parent" 
         android:layout_height= "wrap_content" > 
   
         <TextView 
             android:layout_width= "wrap_content" 
             android:layout_height= "wrap_content" 
             android:text= "3G是否连接:" /> 
   
         <EditText 
             android:id= "@+id/main_et_3g" 
             android:layout_width= "match_parent" 
             android:layout_height= "wrap_content" 
             android:layout_marginLeft= "10dp" 
             android:enabled= "false" /> 
     </LinearLayout> 
   
     <LinearLayout 
         android:layout_width= "match_parent" 
         android:layout_height= "wrap_content" > 
   
         <TextView 
             android:layout_width= "wrap_content" 
             android:layout_height= "wrap_content" 
             android:text= "GPS是否打开:" /> 
   
         <EditText 
             android:id= "@+id/main_et_GPS" 
             android:layout_width= "match_parent" 
             android:layout_height= "wrap_content" 
             android:layout_marginLeft= "10dp" 
             android:enabled= "false" /> 
     </LinearLayout> 
   
</LinearLayout>
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