小编has*_*ash的帖子

为root studio传递null给了我这个警告:

避免将null作为视图根传递(需要解析膨胀布局的根元素上的布局参数)

它显示为空值getGroupView.请帮忙.

public class ExpandableListAdapter extends BaseExpandableListAdapter {

    private Context _context;
    private List<String> _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap<String, List<String>> _listDataChild;

    public ExpandableListAdapter(Context context, List<String> listDataHeader,
                                 HashMap<String, List<String>> listChildData) {
        super();
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }

    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public …

我想在响应头(Set-Cookie)中获取会话令牌.如何才能访问Response头中的值？

var headers = new Headers();
            headers.append('Content-Type', 'application/json');
            console.log('url',this.loginUrl)
            this.http.post(this.loginUrl,
                JSON.stringify({ "username": value.username, "password": value.password }),
                { headers: headers })
                .map((res: Response) => 
                    res.json())
                .subscribe((res) => {
                    console.log("res", res);
                    this.loading.hide();
                    if (res.message_code == "SUCCESS") {
                        this.nav.setRoot(HomePage, {
                            username: value.username,
                        });
                    } else {
                        let alert =  Alert.create({
                            title: "Sign In Error !",
                            subTitle: 'Please Check Username or Password.',
                            buttons: ['Ok']
                        });
                        this.nav.present(alert);
                    }
                }, err => {
                    this.loading.hide();
                    console.log('error', err);

                }); 

这是我的标题回复

设置路径的正确方法是什么？

在我的应用程序我这个代码我使用设置路径发送文件.

app.get('/',function(req, res){//get,put,post,delete   
  res.sendfile(__dirname + '/client/views/index.html');
});

但它给出了这个错误:

express deprecated res.sendfile: Use res.sendFile instead server.js:22:6

可以指出这里的错误是什么.请

应用程序在localhost上正常工作.但是当它连接到服务器时它会出错.
我通过端口22连接服务器

这是错误

Error: listen EADDRNOTAVAIL Error: listen EADDRNOTAVAIL
at errnoException (net.js:904:11)
at Server._listen2 (net.js:1023:19)
at listen (net.js:1064:10)
at net.js:1146:9
at dns.js:72:18
at process._tickCallback (node.js:419:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)
at node.js:906:3

任何帮助!

-update-

我跑 netstat -tulpn | grep 22

结果:

 tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      683/sshd
 tcp6       0      0 :::22                   :::*                    LISTEN      683/sshd

但我跑了 netstat -tulpn | grep 80

什么都没有显示.

任何Help.is这个服务器故障？

赛跑 netstat -nlt

     Active Internet connections (only servers)
     Proto Recv-Q Send-Q Local Address           Foreign Address         State …

我有片段活动与contatin导航抽屉.点击导航抽屉项后,它打开片段1,片段2,片段3.然后在片段1中按钮点击事件后打开新的片段4.

我想要处理后退按键事件我怎样才能在片段4上执行此操作？在片段4中单击后退键后我想返回片段1.

我尝试使用统一的新UI图像系统实现健康到我的播放器.但它不工作.任何人都帮助我.谢谢.

    using UnityEngine.UI;

 if (health_value == 3) {
             GameObject.Find("health").GetComponent<Image>().color.a = 1;
             GameObject.Find("health1").GetComponent<Image>().color.a = 1;
             GameObject.Find("health2").GetComponent<Image>().color.a = 1;

         }

我得到这个错误.

  error CS1612: Cannot modify a value type return value of `UnityEngine.UI.Graphic.color'. Consider storing the value in a temporary variable

我更新我想用搜索corrent POS机inspectionid，activityid，subactivityid但调用更新状态换货即时得到这个error.can有人帮助的时候。

public int updateSubActivityActivityComment(String comment, int rating, int subActivityId, int activityId, int inspectionId){
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();

    contentValues.put(KEY_RATING, rating);
    contentValues.put(KEY_COMMENT, comment);

    return db.updateWithOnConflict(TABLE_INSPECTION, contentValues,KEY_SUB_ACTIVITY_ID+ " = ? "+subActivityId+" AND "+KEY_INSPECTION_ID + " = ? "+inspectionId +" AND "+KEY_ACTIVITY_ID +" = ? "+activityId,new String[]{String.valueOf(subActivityId)} ,SQLiteDatabase.CONFLICT_IGNORE);
}

日志猫

java.lang.IllegalArgumentException: Too many bind arguments.  3 arguments were provided but the statement needs 2 arguments.
                                                     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:68)
                                                     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
                                                     at android.database.sqlite.SQLiteDatabase.updateWithOnConflict(SQLiteDatabase.java:1574)
                                                     at …