小编Gpl*_*rom的帖子

我正在使用usbmanager类来管理我的android 4.1.1机器上的USB主机.对于几百个事务似乎都很好,直到(在900次事务之后)打开设备失败,返回null无例外.使用分析器似乎不是内存泄漏的问题.

这是我从主要活动初始化通信的方式(这样做一次):

public class MainTestActivity extends Activity {

private BroadcastReceiver m_UsbReceiver = null;
private PendingIntent mPermissionIntent = null;
UsbManager m_manager=null;
DeviceFactory m_factory = null;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
    IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);

    filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
    m_UsbReceiver = new BroadcastReceiver() {
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction(); 

          if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
                UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
                if (device != null) {
                    // call your method that cleans …