AltBeacon Beacon创建应用

我需要创建一个超级简单的应用，只需创建一个可检测的蓝牙LE信标，就不需要传输任何数据。我选择了使用AltBeacon的lybrary，因此我使用他们提供的一个示例实现了应用程序。尽管如此，该应用程序崩溃java.lang.NullPointerException: Attempt to invoke virtual method 'void android.bluetooth.le.BluetoothLeAdvertiser.startAdvertising(android.bluetooth.le.AdvertiseSettings, android.bluetooth.le.AdvertiseData, android.bluetooth.le.AdvertiseCallback)' on a null object reference 我得到了积极的结果null检查我的表现，所以我不知道我能做些什么在我身边。有没有人对这个图书馆有任何麻烦？AltBeacon Beacon创建应用

下面的代码是98％的例子available here。我正在使用Android 5.0。

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.widget.Toast; 

import org.altbeacon.beacon.Beacon; 
import org.altbeacon.beacon.BeaconParser; 
import org.altbeacon.beacon.BeaconTransmitter; 

import java.util.Arrays; 
import java.util.Timer; 
import java.util.TimerTask; 

public class MainActivity extends AppCompatActivity { 

    BeaconTransmitter beaconTransmitter; 
    Beacon beacon; 

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

     beacon = new Beacon.Builder() 
       .setId1("2f234454-cf6d-4a0f-adf2-f4911ba9ffa6") 
       .setId2("1") 
       .setId3("2") 
       .setManufacturer(0x0118) 
       .setTxPower(-59) 
       .setDataFields(Arrays.asList(new Long[]{0l})) 
       .build(); 

     if(beacon==null) 
      Toast.makeText(getApplicationContext(), "NULL beacon", Toast.LENGTH_LONG).show(); 
     else 
      Toast.makeText(getApplicationContext(), "OK beacon", Toast.LENGTH_LONG).show(); 

     BeaconParser beaconParser = new BeaconParser().setBeaconLayout("m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25"); 
     beaconTransmitter = new BeaconTransmitter(getApplicationContext(), beaconParser); 

     if(beaconTransmitter==null) 
      Toast.makeText(getApplicationContext(), "NULL beacon trasmitter", Toast.LENGTH_LONG).show(); 
     else 
      Toast.makeText(getApplicationContext(), "OK beacon trasmitter", Toast.LENGTH_LONG).show(); 

     Timer timer = new Timer(); 
     timer.schedule(new TimerTask() { 
      @Override 
      public void run() { 
       beaconTransmitter.startAdvertising(beacon); 
      } 
     }, 5000); 


    } 
}

来源

2015-11-02 AmiguelS

您需要先检查设备的外设模式支持。使用此代码将有助于您ü

BluetoothManager btManager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE); 
      BluetoothAdapter btAdapter = btManager.getAdapter(); 
      if (btAdapter.isEnabled()) 
       boolean isSupported = btAdapter.isMultipleAdvertisementSupported()) ;

来源

2015-11-21 14:33:23

AltBeacon Beacon创建应用

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