Question

这是我第一次问这里，所以我需要帮助。

我看到了相关的主题，但它没有解决我的问题。

我在第d.setName(ds.getValue(Dog.class).getName());行

中收到错误

这是相关代码：

public void getupdates(DataSnapshot dataSnapshot){

    dogies.clear();
    if (dataSnapshot.getChildren() == null) {
        Toast.makeText(c, "No category", Toast.LENGTH_LONG).show();
    }else {
        Toast.makeText(c, "they are  category", Toast.LENGTH_LONG).show();
    }

    for (DataSnapshot ds : dataSnapshot.getChildren()) {
        Dog d = new Dog();
        d.setName(ds.getValue(Dog.class).getName());
        d.setUrl(ds.getValue(Dog.class).getUrl());
        dogies.add(d);
    }
    if(dogies.size()>0)
    {
        customAdapter=new CustomAdapter(c, dogies);
        listView.setAdapter((ListAdapter) customAdapter);
    }else
    {
        Toast.makeText(c, "No data", Toast.LENGTH_SHORT).show();
    }
}

我得到的输出是they are category和No data。

这是引用的类Dog

的来源

public class Dog {

    private  String name;
    private  String url;
    public Dog() {
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }
}

TRAC 02-11 22：33：04.709 1631-1631 / truckstationsa.truckstation E / ActivityThread：无法找到com.google.android.gms.chimera的提供商信息 02-11 22：33：04.727 1631-1648 / truckstationsa.truckstation E / FirebaseInstanceId：Google Play服务缺失或未经正确许可。 02-11 22：33：05.571 1631-1657 / truckstationsa.truckstation E / libEGL：load_driver（/system/lib/egl/libGLES_emulation.so）：dlopen failed：library＆＃34; / system / lib / egl / libGLES_emulation。所以＆＃34;未找到 02-11 22：33：05.658 1631-1657 / truckstationsa.truckstation E / EGL_emulation：tid 1657：eglSurfaceAttrib（1174）：错误0x3009（EGL_BAD_MATCH） 02-11 22：33：05.704 1631-1657 / truckstationsa.truckstation E / EGL_emulation：tid 1657：eglSurfaceAttrib（1174）：错误0x3009（EGL_BAD_MATCH） 02-11 22：33：07.072 1631-1631 / truckstationsa.truckstation E / AndroidRuntime：致命异常：主要流程：truckstationsa.truckstation，PID：1631 com.firebase.client.FirebaseException：无法跳转到键入在com.firebase.client.DataSnapshot.getValue（DataSnapshot.java:185）在truckstationsa.truckstation.FirebaseClient.getupdates（FirebaseClient.java:98）在truckstationsa.truckstation.FirebaseClient $ 1.onChildAdded（FirebaseClient.java:62）在com.firebase.client.core.ChildEventRegistration.fireEvent（ChildEventRegistration.java:61）

complet类 公共类FirebaseClient {

Context c;
String DB_URL;
ListView listView;
Firebase firebase;
ArrayList<Dog> dogies= new ArrayList<>();
CustomAdapter customAdapter;


public  FirebaseClient(Context c, String DB_URL, ListView listView)
{
    this.c= c;
    this.DB_URL= DB_URL;
    this.listView= listView;


    Firebase.setAndroidContext(c);
    firebase=new Firebase(DB_URL);
}

public  void savedata(String name, String url)
{
    Dog d= new Dog();
    d.setName(name);
    d.setUrl(url);

    firebase.child("dog").push().setValue(d);

    //Toast.makeText(this, "hi", Toast.LENGTH_SHORT).show();

}

   public  void refreshdata()
{
    firebase.addChildEventListener(new ChildEventListener() {
        @Override
        public void onChildAdded(DataSnapshot dataSnapshot, String s) {
            getupdates(dataSnapshot);
        }

        @Override
        public void onChildChanged(DataSnapshot dataSnapshot, String s) {
            getupdates(dataSnapshot);
        }

        @Override
        public void onChildRemoved(DataSnapshot dataSnapshot) {

        }

        @Override
        public void onChildMoved(DataSnapshot dataSnapshot, String s) {

        }

        @Override
        public void onCancelled(FirebaseError firebaseError) {

        }
    });
}

public void getupdates（DataSnapshot dataSnapshot）{

    dogies.clear();
    if (dataSnapshot.getChildren() == null) {
        Toast.makeText(c, "No category", Toast.LENGTH_LONG).show();
    }else {
        Toast.makeText(c, "they are  category", Toast.LENGTH_LONG).show();
    }for (DataSnapshot ds : dataSnapshot.getChildren()) {
            Dog d = new Dog();
            d.setName(ds.getValue(Dog.class).getName());
            d.setUrl(ds.getValue(Dog.class).getUrl());
            dogies.add(ds.getValue(Dog.class));
        }

    if(dogies.size()>0)
    {
        customAdapter=new CustomAdapter(c, dogies);
        listView.setAdapter((ListAdapter) customAdapter);
    }else
    {
        Toast.makeText(c, "No data", Toast.LENGTH_SHORT).show();
    }
}

}

Answer 1

您的错误也说：

Google Play services missing or without correct permission.

因此，请添加Google Play服务或设置正确的权限。

无法反弹以输入android firebase

1 个答案: