我已经写了code创建Android设备的接入点。我已经在两个模拟器和真正的device.But这是行不通的测试。在哪里我拿错？

 公共类MainWAP延伸活动{

    WifiManager wifiManager;

    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_main_wap）;
    }

    公共无效openWifi（视图v）{
        createWifiAccessPoint（）;
    }

    私人无效createWifiAccessPoint（）{
        如果（wifiManager.isWifiEnabled（））{
            wifiManager.setWifiEnabled（假）;
        }
        方法[] wmMethods = wifiManager.getClass（）getDeclaredMethods（）。
        布尔methodFound = FALSE;
        对于（方法方法：wmMethods）{
            如果（method.getName（）。等于（setWifiApEnabled））{
                methodFound = TRUE;
                WifiConfiguration用netconfig =新WifiConfiguration（）;
                netConfig.SSID =存取点;
                netConfig.allowedAuthAlgorithms.set（
                    WifiConfiguration.AuthAlgorithm.OPEN）;
                尝试 {
                    布尔apstatus =（布尔）method.invoke（
                        wifiManager，用netconfig，真正的）;
                    对于（方法isWifiApEnabledmethod：wmMethods）{
                        如果（isWifiApEnabledmethod.getName（）。等于（
                                isWifiApEnabled））{
                            而（！（布尔）isWifiApEnabledmethod.invoke（
                                    wifiManager））{};
                            对于（方法方法一：wmMethods）{
                                如果（method1.getName（）。等于（
                                        getWifiApState））{
                                    INT apstate;
                                    apstate =（整数）method1.invoke（
                                        wifiManager）;
                                }
                            }
                        }
                    }
                    如果（apstatus）{
                        Log.d（泼水节活动，
                            接入点创建）;
                    } 其他 {
                        Log.d（泼水节活动，
                            接入点创建失败）;
                    }

                }赶上（抛出：IllegalArgumentException E）{
                    e.printStackTrace（）;
                }赶上（IllegalAccessException E）{
                    e.printStackTrace（）;
                }赶上（的InvocationTargetException E）{
                    e.printStackTrace（）;
                }
            }
        }
        如果（！methodFound）{
            Log.d（泼水节活动，
                不能配置接入点）;
        }
    }
}
 

解决方案

您 WiFiManager 是肯定不会被初始化。

在你的的onCreate 添加方法如下：

  wifiManager =（WiFiManager）getSystemService（Context.WIFI_SERVICE）;
 

I've written the code to create an access point for android devices. I've tested on both emulator and real device.But it doesn't work. Where did i get wrong?

public class MainWAP extends Activity {

    WifiManager wifiManager;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_wap);
    }

    public void openWifi(View v) {
        createWifiAccessPoint();
    }

    private void createWifiAccessPoint() {
        if (wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(false);
        }
        Method[] wmMethods = wifiManager.getClass().getDeclaredMethods();
        boolean methodFound = false;
        for (Method method: wmMethods) {
            if (method.getName().equals("setWifiApEnabled")) {
                methodFound = true;
                WifiConfiguration netConfig = new WifiConfiguration();
                netConfig.SSID = "AccessPoint";
                netConfig.allowedAuthAlgorithms.set(
                    WifiConfiguration.AuthAlgorithm.OPEN);
                try {
                    boolean apstatus = (Boolean) method.invoke(
                        wifiManager, netConfig, true);
                    for (Method isWifiApEnabledmethod: wmMethods) {
                        if (isWifiApEnabledmethod.getName().equals(
                                "isWifiApEnabled")) {
                            while (!(Boolean) isWifiApEnabledmethod.invoke(
                                    wifiManager)) {};
                            for (Method method1: wmMethods) {
                                if (method1.getName().equals(
                                        "getWifiApState")) {
                                    int apstate;
                                    apstate = (Integer) method1.invoke(
                                        wifiManager);
                                }
                            }
                        }
                    }
                    if (apstatus) {
                        Log.d("Splash Activity",
                            "Access Point created");
                    } else {
                        Log.d("Splash Activity",
                            "Access Point creation failed");
                    }

                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        }
        if (!methodFound) {
            Log.d("Splash Activity",
                "cannot configure an access point");
        }
    }
}

Your WiFiManager is definately not initialized.

In your onCreate method add this:

wifiManager = (WiFiManager) getSystemService(Context.WIFI_SERVICE);