java - 如果用户在应用程序运行期间禁用互联网连接，如何强制应用程序结束？

Question

如果用户在应用程序运行期间禁用其互联网连接，我想强制应用程序结束我尝试了这段代码，并且在应用程序开始时工作得很好，但是当我在运行期间禁用互联网时，它并没有关闭!这是我的代码

  @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_log_reg);

    if(!isNetworkAvailable(this)) {
        Toast.makeText(this,"No Internet connection",Toast.LENGTH_LONG).show();
        finish(); //Calling this method to close this activity when internet is not available.
    }
  register_btn = (Button)findViewById(R.id.registerbtn);
    register_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i=new Intent(LogRegActivity.this,RegisterActivity.class);
            startActivity(i);
        }
    });
    login_btn=(Button)findViewById(R.id.loginbtn);
    login_btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent i =new Intent(LogRegActivity.this,LoginActivity.class);
            startActivity(i);
        }
    });

}

public static boolean isNetworkAvailable(Context context) {
    ConnectivityManager conMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if(conMan.getActiveNetworkInfo() != null && conMan.getActiveNetworkInfo().isConnected())
        return true;
    else
        return false;
}

}

这是我的 build.gradle，当我使用广播接收器时，它显示 N 或更高版本不推荐使用接收器，我该如何解决这个问题？？

   <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>

android {
compileSdkVersion 27
defaultConfig {
    applicationId "net.amr.myapplication"
    minSdkVersion 16
    targetSdkVersion 27
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}

Answer 1

使用广播接收器进行连接更改，以下是实现此目的的步骤:

第1步:在manifest.xml中注册接收者

 <receiver android:name="NetworkChangeReceiver ">
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
                <action android:name="android.location.PROVIDERS_CHANGED" /> 
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </receiver>

第 2 步:创建广播接收器:

public class NetworkChangeReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(final Context context, final Intent intent) {

        if(checkInternet(context))
        {
            Toast.makeText(context, "Network Available",Toast.LENGTH_LONG).show(); 
        }

    }

    boolean checkInternet(Context context) {
        ServiceManager serviceManager = new ServiceManager(context);
        if (serviceManager.isNetworkAvailable()) {
            return true;
        } else {
            return false;
        }
    }

}

第 3 步:广播接收器将处理网络更改:

public class HandleNetwork extend AppcompatActivity{

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        registerNetworkBroadcastForNougat();


    }

 private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (isNetworkAvailable(this)) {
             //logic on network enable
        } else {
             //logic on network disable
        }


 public static boolean isNetworkAvailable(Context context) {
        if (context == null) return false;
        try {
            ConnectivityManager connManager = (ConnectivityManager) context.getSystemService
                    (Context.CONNECTIVITY_SERVICE);
            if (connManager.getActiveNetworkInfo() != null && connManager.getActiveNetworkInfo()
                    .isAvailable() && connManager.getActiveNetworkInfo().isConnected()) {
                return true;
            }
        } catch (Exception ex) {

            ex.printStackTrace();
            return false;
        }
        return false;
    }


//Register receiver 

 private void registerNetworkBroadcastForNougat() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            registerReceiver(mMessageReceiver , new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            registerReceiver(mMessageReceiver , new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));
        }
    }

    protected void unregisterNetworkChanges() {
        try {
            unregisterReceiver(mNetworkReceiver);
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unregisterNetworkChanges();
    }
}

}

希望对你有帮助!!