int i = 0;
            String[] Dname = new String[5];
            String[] Daddress = new String[5];
            // 获取已配对蓝牙设备
            Set<BluetoothDevice> paired = mbluetooth.getBondedDevices();
            if(paired.size() > 0){
                for(BluetoothDevice device:paired) {
                    String deviceName = device.getName();
                    String deviceAddress = device.getAddress();
                    Dname[i] = deviceName;
                    Daddress[i] = deviceAddress;
                    i++;
                    Toast.makeText(MainActivity.this,Dname[0],Toast.LENGTH_SHORT).show();
                }
                System.out.println(Dname[0]);
                String[] nameArr = new String[]{"Arun"}; //,"Anil","Ankit","Manoj"
                ArrayAdapter<String> adp = new ArrayAdapter<String >(MainActivity.this,
                        android.R.layout.simple_list_item_1, android.R.id.text1, Dname); //这里换成nameArr就正常，用Dname就出错
                ListView lvofpaired = (ListView) findViewById(R.id.LV_PairedDevices);
                lvofpaired.setAdapter(adp);
                System.out.println(Daddress[0]);