android网络判断

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1.myReceiver.java 广播

public class MyReceiver extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        if (isNetworkConnected(context)) {            int type = getConnectedType(context);            switch (type) {                case -1:                    Toast.makeText(context, "无有网络连接！请手动连接网络", Toast.LENGTH_SHORT)                            .show();                    break;                case 0:                    Toast.makeText(context, "已经接入手机网络，请注意流量！", Toast.LENGTH_SHORT)                            .show();                    break;                case 1:                    Toast.makeText(context, "WIFI网络", Toast.LENGTH_SHORT).show();                    break;                case 2:                    Toast.makeText(context, "wap网络", Toast.LENGTH_SHORT).show();                    break;                case 3:                    Toast.makeText(context, "net网络", Toast.LENGTH_SHORT).show();                    break;                default:                    break;            }        } else {            Toast.makeText(context, "无网络连接！请手动连接网络", Toast.LENGTH_SHORT).show();        }    }    public boolean isNetworkConnected(Context context) {        ConnectivityManager mConnectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();        if (mNetworkInfo != null) {            return mNetworkInfo.isAvailable();        }        return false;    }    public static int getConnectedType(Context context) {        if (context != null) {            ConnectivityManager mConnectivityManager = (ConnectivityManager) context                    .getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo mNetworkInfo = mConnectivityManager                    .getActiveNetworkInfo();            if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {                return mNetworkInfo.getType();            }        }        return -1;    }}

2.在入口activity.java注册广播

public class MainActivity extends Activity {    TextView textView;    Button button;    IntentFilter intentFilter;    MyReceiver myReceiver = new MyReceiver();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    public void initView() {        textView = (TextView) findViewById(R.id.tv);        button = (Button) findViewById(R.id.btn);        intentFilter = new IntentFilter();        intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);           //为BroadcastReceiver指定action，使之用于接收同action的广播        //registerReceiver(myReceiver, intentFilter);        Intent service = new Intent(this, MyReceiver.class);        startService(service);        button.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View arg0) {                if (isNetworkConnected(getApplicationContext())) {                    // -1：没有网络 0:手机网络 1：WIFI网络 2：wap网络 3：net网络                    int type = getConnectedType(getApplicationContext());                    switch (type) {                        case -1:                            textView.setText("无网络接入" + type);                            Toast.makeText(getApplicationContext(),                                    "无有网络连接！请手动连接网络", Toast.LENGTH_SHORT).show();                            break;                        case 0:                            textView.setText("已经接入手机网络，请注意流量！" + type);                            Toast.makeText(getApplicationContext(),                                    "已经接入手机网络，请注意流量！", Toast.LENGTH_SHORT).show();                            break;                        case 1:                            textView.setText("WIFI网络" + type);                            Toast.makeText(getApplicationContext(), "WIFI网络",                                    Toast.LENGTH_SHORT).show();                            break;                        case 2:                            textView.setText("wap网络" + type);                            Toast.makeText(getApplicationContext(), "wap网络",                                    Toast.LENGTH_SHORT).show();                            break;                        case 3:                            textView.setText("net网络" + type);                            Toast.makeText(getApplicationContext(), "net网络",                                    Toast.LENGTH_SHORT).show();                            break;                        default:                            break;                    }                } else {                    textView.setText("无网络接入");                    Toast.makeText(getApplicationContext(), "无有网络连接！请手动连接网络",                            Toast.LENGTH_SHORT).show();                }            }        });    }    @Override    protected void onStop() {        super.onStart();        /**         * 卸载广播         */        unregisterReceiver(myReceiver);    }    /**     * 判断有无网络连接     *     * @param context     * @return     */    public boolean isNetworkConnected(Context context) {        ConnectivityManager mConnectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();        if (mNetworkInfo != null) {            return mNetworkInfo.isAvailable();        }        return false;    }////  public boolean isMobileConnected(Context context) {//      if (context != null) {//          ConnectivityManager mConnectivityManager = (ConnectivityManager) context//                  .getSystemService(Context.CONNECTIVITY_SERVICE);//          NetworkInfo mMoBileNetworkInfo = mConnectivityManager//                  .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);//          if (mMoBileNetworkInfo != null) {//              return mMoBileNetworkInfo.isAvailable();//          }//      }//      return false;//  }////  public boolean isWifiConnected(Context context) {//      if (context != null) {//          ConnectivityManager mConnectivityManager = (ConnectivityManager) context//                  .getSystemService(Context.CONNECTIVITY_SERVICE);//          NetworkInfo mWiFiNetworkInfo = mConnectivityManager//                  .getNetworkInfo(ConnectivityManager.TYPE_WIFI);//          if (mWiFiNetworkInfo != null) {//              return mWiFiNetworkInfo.isAvailable();//          }//      }//      return false;//  }    public static int getConnectedType(Context context) {        if (context != null) {            ConnectivityManager mConnectivityManager = (ConnectivityManager) context                    .getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo mNetworkInfo = mConnectivityManager                    .getActiveNetworkInfo();            if (mNetworkInfo != null && mNetworkInfo.isAvailable()) {                return mNetworkInfo.getType();            }        }        return -1;    }}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.zdemo.network"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="19" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.zdemo.network.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <!-- 注册网络判断的广播 start -->        <receiver android:name="util.MyReceiver" >            <intent-filter>                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </receiver>        <!-- 注册网络判断的广播 end -->    </application></manifest>

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" ><Button     android:id="@+id/btn"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="点击监测网络状态"/>    <TextView        android:id="@+id/tv"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world"         android:layout_below="@id/btn"/></RelativeLayout>

把代码拷贝运行就OK了。

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