angular – 无法解析AuthenticationService的所有参数：([object Object],？,[object Object])

@Inject(forwardRef(() => AuthenticationService)) public authService: AuthenticationService

import { Injectable } from '@angular/core';
import {Http,Headers,Response} from '@angular/http';
import 'rxjs/add/operator/toPromise';
import {Observable} from 'rxjs/Rx';

import {AppServices} from "../../app.services";
import {Router} from "@angular/router";

@Injectable()
export class AuthenticationService {
  public token: any;

  constructor(
    private http: Http,private appService: AppServices,private router: Router
  ) {
    this.token = localStorage.getItem('token');
  }

  login(username: string,password: string): Observable<boolean> {
    let headers = new Headers();
    let body = null;
    headers.append("Authorization",("Basic " + btoa(username + ':' + password)));

    return this.http.post(this.appService.api + '/login',body,{headers: headers})
      .map((response: Response) => {
        let token = response.json() && response.json().token;
        if (token) {
          this.token = token;
          localStorage.setItem('Conform_token',token);
          return true;
        } else {
          return false;
        }
      });
  }

  logout(): void {
    this.token = null;
    localStorage.removeItem('Conform_token');
    this.router.navigate(['/login']);
  }
}

import {Injectable} from '@angular/core';
import {Headers,Http,RequestOptions} from '@angular/http';
import {Router} from "@angular/router";
import {AuthenticationService} from "./auth/auth.service";

import 'rxjs/add/operator/toPromise';
import {Observable} from 'rxjs/Rx';

@Injectable()

export class AppServices {

  api = '//endpoint/';

  public options: any;
  constructor(
    private http: Http,private router: Router,public authService: AuthenticationService // doesn't work
  //  @Inject(forwardRef(() => AuthenticationService)) public authService: AuthenticationService // doesn't work either
      ) {
        let head = new Headers({
      'Authorization': 'Bearer ' + this.authService.token,"Content-Type": "application/json; charset=utf8"
    });
    this.options = new RequestOptions({headers: head});
  }

  // ====================
  //    data services
  // ====================

  getData(): Promise<any> {
    return this.http
      .get(this.api + "/data",this.options)
      .toPromise()
      .then(response => response.json() as Array<Object>)
      .catch((err)=>{this.handleError(err);})
  }

import { browserModule } from '@angular/platform-browser';
import { browserAnimationsModule } from '@angular/platform-browser/animations';

import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import {BaseRequestOptions,HttpModule} from '@angular/http';

import { MaterialModule} from '@angular/material';
import {FlexLayoutModule} from "@angular/flex-layout";
import 'hammerjs';

import { routing,appRoutingProviders }  from './app.routing';
import { AppServices } from './app.services';
import {AuthGuard} from "./auth/auth.guard";
import {AuthenticationService} from "./auth/auth.service";

import {AppComponent} from './app.component';
import {AuthComponent} from './auth/auth.component';
import {NotFoundComponent} from './404/not-found.component';
import { HomeComponent } from './home/home.component';

@NgModule({
  declarations: [
    AppComponent,AuthComponent,NotFoundComponent,HomeComponent
  ],imports: [
    browserModule,browserAnimationsModule,FormsModule,HttpModule,routing,MaterialModule,FlexLayoutModule
  ],providers: [AppServices,AuthGuard,AuthenticationService],bootstrap: [AppComponent]
})
export class AppModule { }

export class AuthenticationService {
  public token: any;
  appService: AppServices;
  constructor(
    private http: Http,// private appService: AppServices,injector:Injector;
    private router: Router
  ) {
    setTimeout(() => this.appService = injector.get(AppServices));
    this.token = localStorage.getItem('token');
  }

Java Object 对象的 wait () 和 notify ()、notifyAll ()

在一个线程中通过一个对象来获得锁，调用 wait（）函数，线程进入阻塞状态。

另一个线程通过也锁定此对象，调用对象的 notify () 方法通知其中给一个调用 wait 的对象结束等待状态。如果是调用 notifyAll () 通知的是前面所有调用此对象 wait () 方法的线程继续执行。

测试代码：

public class ObjectNotifyTestMain { public static void main(String[] args) { testNotify();
        testNotifyAll();
    } private static void testNotifyAll() { Object obj = new Object();
        Thread thread1 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                } catch (InterruptedException e) { e.printStackTrace();
                } } });
        Thread thread2 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");

                } catch (InterruptedException e) { e.printStackTrace();
                } } });
        thread1.start();
        thread2.start();
        try { Thread.sleep(100);
            synchronized (obj) { obj.notifyAll();
            } } catch (InterruptedException e) { e.printStackTrace();
        } } private static void testNotify() { Object obj = new Object();
        Thread thread1 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                    obj.notify();
                } catch (InterruptedException e) { e.printStackTrace();
                } } });

        Thread thread2 = new Thread(() -> { synchronized (obj) { System.out.println(Thread.currentThread().getName() + " - start");
                obj.notify();
                try { obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                } catch (InterruptedException e) { e.printStackTrace();
                } } });


        thread1.start();
        thread2.start();
    } } 

Java Object 对象的 wait() 和 notify()、notifyAll()

在一个线程中通过一个对象来获得锁，调用wait（）函数，线程进入阻塞状态。

另一个线程通过也锁定此对象，调用对象的notify()方法通知其中给一个调用wait的对象结束等待状态。如果是调用notifyAll()通知的是前面所有调用此对象wait()方法的线程继续执行。

测试代码：

public class ObjectNotifyTestMain { public static void main(String[] args) { testNotify();
        testNotifyAll();
    } private static void testNotifyAll() { Object obj = new Object();
        Thread thread1 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                } catch (InterruptedException e) { e.printStackTrace();
                } } });
        Thread thread2 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");

                } catch (InterruptedException e) { e.printStackTrace();
                } } });
        thread1.start();
        thread2.start();
        try { Thread.sleep(100);
            synchronized (obj) { obj.notifyAll();
            } } catch (InterruptedException e) { e.printStackTrace();
        } } private static void testNotify() { Object obj = new Object();
        Thread thread1 = new Thread(() -> { synchronized (obj) { try { System.out.println(Thread.currentThread().getName() + " - start");
                    obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                    obj.notify();
                } catch (InterruptedException e) { e.printStackTrace();
                } } });

        Thread thread2 = new Thread(() -> { synchronized (obj) { System.out.println(Thread.currentThread().getName() + " - start");
                obj.notify();
                try { obj.wait();
                    System.out.println(Thread.currentThread().getName() + " - resume");
                } catch (InterruptedException e) { e.printStackTrace();
                } } });


        thread1.start();
        thread2.start();
    } } 

关于Objectify和TimerTask：此线程未注册API环境和显示创建线程的介绍已经告一段落，感谢您的耐心阅读，如果想了解更多关于Android中的Timer和TimerTask、angular – 无法解析AuthenticationService的所有参数：([object Object],？,[object Object])、Java Object 对象的 wait () 和 notify ()、notifyAll ()、Java Object 对象的 wait() 和 notify()、notifyAll()的相关信息，请在本站寻找。

此处将为大家介绍关于如何获取notifyDatasetChanged的详细内容，并且为您解答有关与ListAdapter一起使用？的相关问题，此外，我们还将为您介绍关于android adapter notifydatasetchanged时，如何不上焦点、Android adapter.notifyDataSetChanged()不工作？、Android CustomListAdapter notifydatachange()不起作用、Android notifyDataSetChanged的有用信息。

• 如何获取notifyDatasetChanged（）与ListAdapter一起使用？（list.notify）
• android adapter notifydatasetchanged时，如何不上焦点
• Android adapter.notifyDataSetChanged()不工作？
• Android CustomListAdapter notifydatachange()不起作用
• Android notifyDataSetChanged

如何获取notifyDatasetChanged（）与ListAdapter一起使用？（list.notify）

现在，我使用setAdapter更新我的ListView，但我认为正确的方法是使用notifiyDatasetChanged（），但我无法在主类中使用它（它在适配器中）。这是错误：

ListAdapter类型的方法notifyDatasetChanged（）未定义

我猜想有一种更好的方法-有人能指出我正确的方向吗？

这是我的代码的相关部分：

public class ScoreList extends SherlockFragmentActivity {    private ListView listViewScore;    static List<Score> listScore = new ArrayList<Score>();    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.score_list);        ctx = this;        listScore = dbh.getAllScores();        listViewScore = (ListView) findViewById(R.id.score_list);        listViewScore.setAdapter(new ScoreListAdapter(ctx,                R.layout.score_row_item, listScore));        listViewScore.getAdapter().notifyDatasetChanged(); //this is where I get the error    }}

这是适配器：

public class ScoreListAdapter extends ArrayAdapter<Score> {    private int resource;    private LayoutInflater inflater;    public ScoreListAdapter(Context ctx, int resourceId, List<Score> objects) {        super(ctx, resourceId, objects);        resource = resourceId;        inflater = LayoutInflater.from(ctx);        //context = ctx;    }    @Override    public View getView(final int position, View convertView, ViewGroup parent) {        convertView = (LinearLayout) inflater.inflate(resource, null);        Score score = getItem(position);        TextView txtName = (TextView) convertView.findViewById(R.id.name);        txtName.setText(score.getName());        TextView txtScoreChange = (TextView) convertView                .findViewById(R.id.scoreChange);        int scoreChange = Integer.parseInt(score.getScoreChange());        if (scoreChange > 0)            txtScoreChange.setText("+" + scoreChange);        else if (scoreChange < 0)            txtScoreChange.setText("" + scoreChange);        else            txtScoreChange.setText("");        TextView txtScoreTotal = (TextView) convertView                .findViewById(R.id.scoreTotal);        txtScoreTotal.setText(score.getScoreTotal());        final LinearLayout currentRow = (LinearLayout) convertView                .findViewById(R.id.scoreRowLayout);        notifyDataSetChanged();        return convertView;    }   }

答案1

创建您的自定义适配器的实例，以便您可以在任何喜欢的地方使用它…

public class ScoreList extends SherlockFragmentActivity {private ListView listViewScore;private ScoreListAdapter adapter;static List<Score> listScore = new ArrayList<Score>();@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.score_list);    ctx = this;    listScore = dbh.getAllScores();    listViewScore = (ListView) findViewById(R.id.score_list);    adapter = new ScoreListAdapter(ctx, R.layout.score_row_item, listScore);    listViewScore.setAdapter(adapter);    adapter.notifyDatasetChanged(); }}

顺便说一句，如果您的listScore数组已经加载，那么您不需要使用

adapter.notifyDatasetChanged();

android adapter notifydatasetchanged时，如何不上焦点

最近遇到一个非常头疼的问题：

问题的场景如下

girdview刷新时用的是adapter.notifydatasetchanged,当刷新前gridview无数据时，刷新后gridview会上焦点，而且选中第一个item。当刷新前gridview有数据时，刷新后gridview就不会重新上焦点。

哪位大神帮忙解决一下，我真的不想上焦点，只想刷新数据显示就可以了

Android adapter.notifyDataSetChanged()不工作？

//stripped down version
public class main extends ListActivity {

ArrayList<String> listItems = new ArrayList<String>();
ArrayAdapter<String> adapter;
final EditText input = (EditText)findViewById(R.id.input);


input.addTextChangedListener(new TextWatcher() {    
    public void onTextChanged(CharSequence s,int start,int before,int count) {   
            if(!input.getText().toString().equals("")) {
            new GetDataTask().execute(input.getText().toString());
        }

    }   
});

private class GetDataTask extends AsyncTask<String,Void,ArrayList<String>> {
        protected ArrayList<String> doInBackground(String... query) {

        URL url = new URL("http://myserversaddressgoeshere.com/search/thequerygoeshere");
        URLConnection conn = url.openConnection();
        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
            ArrayList<String> items = new ArrayList<String>();
        //the code that parses the JSON goes here; it writes some strings to items
        return items;
        }

        protected void onPostExecute(ArrayList<String> items) {
            listItems = items;
        adapter.notifyDataSetChanged();
        }
}

}

protected void onPostExecute(ArrayList<String> items) {
        listItems.clear();
        listItems.addAll(items);
        adapter.notifyDataSetChanged();
    }

adapter = new ArrayAdapter<String>(listItems);

Android CustomListAdapter notifydatachange()不起作用

我想使用Custom ArrayAdapter显示项目列表.

我将通过单击按钮插入数据.

MainFragment.java

@Override
        public void onClick(View v) {
            DatabaseClass Feed = new DatabaseClass(getActivity());
            new DatabaseClass(getActivity()).getList();
            new MyFragment().updateList();
        }

我的布局文件如下.

main.xml中

 <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical" >

                <fragment
                    android:id="@+id/update"
                    android:name="com.android.MyFragment"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" />
            </LinearLayout>

MyFragment.java

import java.util.List;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class MyFragment extends ListFragment {

    // creating database reference
    private static DatabaseClass Feed;
    private List<CustomModel> customList;
    private static Customlistadapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Feed = new DatabaseClass(getActivity());
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        // To get List of CustomModel objects
        Feed.getList();

        // CUSTOM_LIST is list constant
        adapter = new Customlistadapter(getActivity(),
                R.layout.update, Utils.CUSTOM_LIST);

        // setting adapter      
        setlistadapter(adapter);
        View view = inflater.inflate(R.layout.update, container, false);

        return view;
    }

    @Override
    public void onStart() {
        super.onStart();
    }

    // this method is called after inserting data into database
    public void updateList() {
        if (adapter != null) {
            adapter.notifyDataSetChanged();
        } else {
            adapter = new Customlistadapter(getActivity(),
                    R.layout.update, Utils.CUSTOM_LIST);
            adapter.notifyDataSetChanged();
        }
    }

    private class Customlistadapter extends ArrayAdapter<CustomModel> {

        private final Context context;
        private final List<CustomModel> list;
        private TextView name, message;

        public Customlistadapter(Context context, int resource,
                List<CustomModel> list) {
            super(context, resource, list);
            this.context = context;
            this.list = list;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View view = inflater.inflate(R.layout.single_row, parent,
                    false);

            name = (TextView) view.findViewById(R.id.name);
            message = (TextView) view.findViewById(R.id.message);
            CustomModel obj = list.get(position);

            name.setText(obj.getName());
            message.setText(obj.getMessage());

            return view;
        }
    }
}

并且MyFragment.java的布局文件是

update.xml

<ListView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@android:id/list"
 />

我的数据库类是

DatabaseClass.java

    public void getList(){
        ourDatabase = this.getReadableDatabase();
        String sql = "SELECT * FROM " + DATABASE_TABLE;
        Cursor c = ourDatabase.rawQuery(sql, null);

        int iName = c.getColumnIndex(KEY_NAME);
        int iMessage = c.getColumnIndex(KEY_MESSAGE);

        for (c.movetoFirst(); !c.isAfterLast(); c.movetoNext()) {
            CustomModel model = new CustomModel();


            model.setName(c.getString(iFromName));
            model.setMessage(c.getString(iMessage));

            Utils.LIST.add(model);
        }
}

点击按钮,数据被插入到数据库中.但它没有在UI中反映出来.
为什么我的列表视图没有更新？

谢谢

解决方法:

按如下方式更改适配器

    private class Customlistadapter extends ArrayAdapter<CustomModel> {

    private final Context context;
    private final List<CustomModel> list;
    private TextView name, message;

    public Customlistadapter(Context context, int resource,
            List<CustomModel> list) {
        super(context, resource, list);
        this.context = context;
        this.list = list;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View view = inflater.inflate(R.layout.single_row, parent, false);

        name = (TextView) view.findViewById(R.id.name);
        message = (TextView) view.findViewById(R.id.message);
        CustomModel obj = list.get(position);

        name.setText(obj.getName());
        message.setText(obj.getMessage());

        return view;
    }

    public void updateList(List<CustomModel> list) {

        this.list = list;
        notifyDataSetChanged();

    }
}

所以在你的适配器本身添加方法updateList并调用方法notifyDataSetChanged();

所以从你的活动而不是调用notifyDataSetChanged();调用updateList(List< CustomModel> newList)

我相信这会奏效.

Android notifyDataSetChanged

我有一个列表,其中填充了自定义ArrayAdapter.

我想每秒更新一个进度条,所以我试图使用notifyDataSetChanged()来重新绘制列表,但它似乎不起作用.

解决方法:

你如何更新为ArrayAdapter提供的List数据结构？

请在这里查看我的答案：notifyDataSetChanged example

有关ArrayAdapters的问题和更新保存notifyDataSetChanged数据的List工作.

关于如何获取notifyDatasetChanged和与ListAdapter一起使用？的问题我们已经讲解完毕，感谢您的阅读，如果还想了解更多关于android adapter notifydatasetchanged时，如何不上焦点、Android adapter.notifyDataSetChanged()不工作？、Android CustomListAdapter notifydatachange()不起作用、Android notifyDataSetChanged等相关内容，可以在本站寻找。