1. 可以自定义蓝牙配对对话框，以便控制对话框的显示时间。可参考以下示例代码：

BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (device.getBondState() == BluetoothDevice.BOND_BONDING) {
   //  自定义配对对话框
   final Dialog dialog = new Dialog(context);
   dialog.setContentView(R.layout.custom_bluetooth_pairing_dialog);
   dialog.setTitle(R.string.bluetooth_pairing_title);

   ((TextView) dialog.findViewById(R.id.tvDescription)).setText(context.getString(R.string.bluetooth_pairing_text, device.getName()));
   Button btnCancel = (Button) dialog.findViewById(R.id.btnCancel);
   btnCancel.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View view) {
           dialog.dismiss();
       }
   });
   dialog.show();

   //  设置5秒钟后自动隐藏对话框
   new Handler().postDelayed(new Runnable() {
       @Override
       public void run() {
           if (dialog.isShowing()) {
               dialog.dismiss();
           }
       }
   }, 5000);
}

2. 如果不需要自定义对话框，可以通过反射来改变配对对话框的显示时间。可参考以下示例代码：

private void setPairingConfirmation(BluetoothDevice device, boolean confirm) throws Exception {
    Method setPairingConfirmationMethod = device.getClass().getDeclaredMethod("setPairingConfirmation", boolean.class);
    setPairingConfirmationMethod.invoke(device, confirm);
    if (!confirm) {
        Method cancelPairingUserInputMethod = device.getClass().getDeclaredMethod("cancelPairingUserInput");
        cancelPairingUserInputMethod.invoke(device);
    }
}

private void pairDevice(BluetoothDevice device) {
    if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
        try {
            setPairingConfirmation(device, true);
            device.createBond();
            //  反射设置配对对话框显示时间为10秒
            int timeout = 10000;
            Field field = device.getClass().getField("TRANSACTION_PAIRING_WAIT");
            int TRANSACTION