问题描述

在Fragment中添加了一个按钮，但是一按按钮就闪退，求大神指点。

package com.example.fragmentdemo;

import com.example.fragmentdemo.MessageFragment;
import com.example.fragmentdemo.R;
import com.wifi.WifiAdmin;
import com.wifi.WifiApAdmin;
import android.app.Fragment;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class MessageFragment extends Fragment {
public static final String TAG = ""MessageFragment"";

private Button mBtn1 mBtn2;  private WifiAdmin mWifiAdmin;  private Context mContext = null;  @Overridepublic View onCreateView(LayoutInflater inflater ViewGroup container        Bundle savedInstanceState) {    View newsLayout = inflater.inflate(R.layout.message_layout container            false);    return newsLayout;}    public void onViewCreated(View view Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onViewCreated(view savedInstanceState);     mBtn1 = (Button)view.findViewById(R.id.button1);       mBtn2 = (Button)view.findViewById(R.id.button2);       mBtn1.setText(""点击连接Wifi"");       mBtn2.setText(""点击创建Wifi热点"");       mBtn1.setOnClickListener(new Button.OnClickListener() {           @Override           public void onClick(View v) {               // TODO Auto-generated method stub               mWifiAdmin = new WifiAdmin(mContext) {                   @Override                   public void myUnregisterReceiver(BroadcastReceiver receiver) {                       // TODO Auto-generated method stub                       getActivity().unregisterReceiver(receiver);                   }                   @Override                   public Intent myRegisterReceiver(BroadcastReceiver receiver                           IntentFilter filter) {                       // TODO Auto-generated method stub                       getActivity().registerReceiver(receiver filter);                       return null;                   }                   @Override                   public void onNotifyWifiConnected() {                       // TODO Auto-generated method stub                       Log.v(TAGhave connected success!"");                       Log.v(TAG###############################"");                   }                   @Override                   public void onNotifyWifiConnectFailed() {                       // TODO Auto-generated method stub                       Log.v(TAGhave connected failed!"");                       Log.v(TAG###############################"");                   }               };               mWifiAdmin.openWifi();               mWifiAdmin.addNetwork(mWifiAdmin.createWifiInfo(""YOU_WIFI""MM123456"" WifiAdmin.TYPE_WPA));           }       });       mBtn2.setOnClickListener(new Button.OnClickListener() {           @Override           public void onClick(View v) {               // TODO Auto-generated method stub               WifiApAdmin wifiAp = new WifiApAdmin(mContext);               wifiAp.startWifiAp(""""HotSpot""""hhhhhh123"");           }       });   }    @Override       public void onResume() {           super.onResume();           Log.d(""Rssi""Registered"");       }       @Override       public void onPause() {           super.onPause();           Log.d(""Rssi""Unregistered"");       }  

}
以下是错误日志报告：
求大神指点迷津！！！

解决方案

 private Context mContext = null;  这个变量赋值了吗？

解决方案二：
一个空指针异常而已，程序里也没看到你对mContext赋值吗，直接看下是那个对象报空指针了

解决方案三：
null指针问题：看下属性指代，位置错误