Android 蓝牙适配器问题？

我只是在写下面的代码，在“mBtAdapter.startDiscovery（）；”上遇到了一些问题，我不明白到底发生了什么，我只想启动蓝牙并在加载应用程序时将设备添加到阵列中

package com.wiztech.veer;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.os.Bundle;
import android.widget.ArrayAdapter;

public class BLU_TESTActivity extends Activity {

// Member fields
private BluetoothAdapter mBtAdapter;
private ArrayAdapter<String> mPairedDevicesArrayAdapter;
private ArrayAdapter<String> mNewDevicesArrayAdapter;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    // Get the local Bluetooth adapter
    mBtAdapter = BluetoothAdapter.getDefaultAdapter();
    mBtAdapter.startDiscovery();

}
}

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请帮忙

您已尝试broadcastReceiver（），或者您可能在manifest.xml中缺少权限

07-26 13:21:52.178: ERROR/AndroidRuntime(4962): ERROR: thread attach failed
07-26 13:21:53.518: ERROR/ActivityManager(117): fail to set top app changed!
07-26 13:21:53.668: ERROR/AndroidRuntime(4970): ERROR: thread attach failed