Question

我正在尝试启用和禁用我的wifi广播接收器，但什么也没发生。我希望有人可以帮助我知道问题在哪里。提前谢谢你。

这是我正在使用的代码：

编辑我添加onResume onPause活动，并且应用程序开始扫描，就像启用和禁用功能不存在一样。这是我的主要活动：

 public class MainActivity extends Activity {

    WifiManager wifi;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);

    }
/**Mthods added in the edit **/
public void onPause() {
    super.onPause();
    this.unregisterReceiver(broad);

}
/**
 * Broadcast receiver to update 
 */

public void onResume() {
    super.onResume();

    //Note: Not using RSSI_CHANGED_ACTION because it never calls me back.
    super.registerReceiver(broad, new IntentFilter("android.intent.action.BOOT_COMPLETED"));
    IntentFilter rssiFilter = new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
    this.registerReceiver(broad, rssiFilter);

    WifiManager wifiMan=(WifiManager)MainActivity.this.getSystemService(Context.WIFI_SERVICE);
    wifiMan.startScan();

}


/**End Mthods added in the edit **/

/**
 * This method enables the Broadcast receiver registered in the AndroidManifest file.
 * @param view
 */
    public void enableBroadcastReceiver(View view){
          ComponentName receiver = new ComponentName(this, BroadcsatReceiverMnager.class);
          PackageManager pm = this.getPackageManager();

          pm.setComponentEnabledSetting(receiver,
                  PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                  PackageManager.DONT_KILL_APP);
          Toast.makeText(this, "Enabled broadcast receiver", Toast.LENGTH_SHORT).show();
        }
/**
* This method disables the Broadcast receiver registered in the AndroidManifest file.
* @param view
*/
public void disableBroadcastReceiver(View view){
  ComponentName receiver = new ComponentName(this, BroadcsatReceiverMnager.class);
  PackageManager pm = this.getPackageManager();

  pm.setComponentEnabledSetting(receiver,
          PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
          PackageManager.DONT_KILL_APP);
  Toast.makeText(this, "Disabled broadcst receiver", Toast.LENGTH_SHORT).show();
}

}

这是我的BroadcsatReceiverMnager类

   public class BroadcsatReceiverMnager extends BroadcastReceiver {
    int newRssi;

     int rssi1 ;
   int rssi2;
   int rssi3 ;
   int res = rssi1+rssi2+rssi3;
   int rssiOp1=0  ;
    int rssiOp2 =0 ;
    int rssiOp3=0  ;
    long distanceTemp;
    WifiManager wifi;

    protected void onCreate(Context context) {


        wifi = (WifiManager)context.getSystemService(Context.WIFI_SERVICE);

    }

    @Override
    public void onReceive(Context arg0, Intent arg1) {      
        Toast.makeText(arg0,"MyTag BroadcsatReceiverMnager "+ "onReceive", Toast.LENGTH_LONG).show();

        wifi = (WifiManager)arg0.getSystemService(Context.WIFI_SERVICE);

    if(arg1.getAction().equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION )){
             List<ScanResult> results = wifi.getScanResults();
            Toast.makeText(arg0, "results"+results, Toast.LENGTH_SHORT).show();
            rssiOp1 =   results.get(0).level;
            rssiOp2 =   results.get(1).level;
            rssiOp3 =   results.get(2).level;
      }

     WifiManager wifiMan=(WifiManager)arg0.getSystemService(Context.WIFI_SERVICE);
      wifiMan.startScan();
      int newRssi = wifiMan.getConnectionInfo().getRssi();
      Toast.makeText(arg0, "BroadcsatReceiverMnager"+newRssi, Toast.LENGTH_SHORT).show();

}

}

这是manifest.xml的一部分 EDITED：

 <!-- Broadcast receiver -->
    <receiver android:name="com.example.downloadservicetest1.BroadcsatReceiverMnager" >
       <intent-filter>
    <action android:name="android.net.wifi.supplicant.STATE_CHANGE" />
  </intent-filter>
  </receiver>

Android：启用和禁用BroadcastReceiver

0 个答案: