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我正在開發一個使用Eclipse的Android應用程序來返回藍牙設備的RSSI值。我已經修改了Android藍牙聊天示例以適應我的需要,但是我在返回RSSI值時遇到了問題。點擊掃描按鈕以發現附近的設備,它返回設備名稱,設備地址,並且還假設返回RSSI值,但是它表示RSSI的null
。返回藍牙設備的RSSI值時的問題
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
// When discovery finds a device
if (BluetoothDevice.ACTION_FOUND.equals(action)) {
// Get the BluetoothDevice object from the Intent
BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
// Get the Bluetooth RSSI
short Rssi = intent.getShortExtra(BluetoothDevice.EXTRA_RSSI,Short.MIN_VALUE);
// If it's already paired, skip it, because it's been listed already
// Added getRssi()
if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress() + getRssi());
}
// When discovery is finished, change the Activity title
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
setProgressBarIndeterminateVisibility(false);
setTitle(R.string.select_device);
if (mNewDevicesArrayAdapter.getCount() == 0) {
String noDevices = getResources().getText(R.string.none_found).toString();
mNewDevicesArrayAdapter.add(noDevices);
}
}
}
};