Question

构建gradle时出现以下错误。我不知道该怎么做请大家帮助我，但这个问题是在将工作室从2.3更新到3.0.1之后才提前工作正常，但现在它失败了。

我使用工作室2.3未检测到错误但更新后出现此错误。当我同步项目时没有在任何依赖项中检测到错误但是当我去运行/构建时出现以下错误：

类FirebaseRecyclerAdapter中的构造函数FirebaseRecyclerAdapter无法应用于给定类型; 必需：FirebaseRecyclerOptions found：Class，int，Class，DatabaseReference 原因：实际和正式的参数列表长度不同其中T，VH是类型变量： T扩展了类FirebaseRecyclerAdapter中声明的Object VH扩展了FirebaseRecyclerAdapter类中声明的ViewHolder 错误：（74,11）错误：不是抽象的，并且不会覆盖FirebaseRecyclerAdapter中的抽象方法onBindViewHolder（InstaViewHolder，int，Insta）错误：（81,13）错误：方法不会覆盖或实现超类型的方法错误：任务＆＃39;：app：compileDebugJavaWithJavac＆＃39;执行失败。

我的主要activity.java代码如下：

package com.example.dunia_technology.suaforum;

    import android.content.Context;
    import android.content.Intent;
    import android.os.Build;
    import android.os.Bundle;
    import android.support.annotation.NonNull;
    import android.support.annotation.RequiresApi;
    import android.support.design.widget.FloatingActionButton;
    import android.support.design.widget.Snackbar;

    import android.support.v7.app.AppCompatActivity;
    import android.support.v7.widget.LinearLayoutManager;
    import android.support.v7.widget.RecyclerView;
    import android.support.v7.widget.Toolbar;
    import android.view.View;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.widget.ImageView;
    import android.widget.TextView;

    import com.firebase.ui.database.FirebaseRecyclerAdapter;
    import com.google.firebase.auth.FirebaseAuth;
    import com.google.firebase.database.DatabaseReference;
    import com.google.firebase.database.FirebaseDatabase;

    public class MainActivity extends AppCompatActivity {
        private RecyclerView mInstaList;
        private DatabaseReference  mDatabase;
        private FirebaseAuth mAuth;
        private FirebaseAuth.AuthStateListener mAuthListener;



        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);

            mInstaList=(RecyclerView)findViewById(R.id.insta_list);
            mInstaList.setHasFixedSize(true);
            mInstaList.setLayoutManager(new LinearLayoutManager(this));
            mDatabase=FirebaseDatabase.getInstance().getReference().child("InstaApp");

            mAuth=FirebaseAuth.getInstance();
            mAuthListener =new FirebaseAuth.AuthStateListener() {
                @Override
                public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                    if(firebaseAuth.getCurrentUser()==null){
                        Intent loginIntent=new Intent(MainActivity.this,RegisterActivity.class);
                        loginIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
                        startActivity(loginIntent);

                    }
                }
            };

        }

        @RequiresApi(api = Build.VERSION_CODES.GINGERBREAD)
        @Override
        protected void onStart() {
            super.onStart();
            mAuth.addAuthStateListener(mAuthListener);
            FirebaseRecyclerAdapter<Insta,InstaViewHolder> FBRA=new FirebaseRecyclerAdapter<Insta,InstaViewHolder> (
                    Insta.class,
                    R.layout.insta_row,
                    InstaViewHolder.class,
                    mDatabase
            ) {
                @Override
                protected void populateViewHolder(InstaViewHolder viewHolder, Insta model, int position) {


                    viewHolder.setTitle(model.getTitle());
                    viewHolder.setDesc(model.getDesc());
                    viewHolder.setImage(getApplicationContext(),model.getImage());

                }
            };

            mInstaList.setAdapter(FBRA);

        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
        }
        public static class InstaViewHolder extends RecyclerView.ViewHolder{

            public InstaViewHolder(View itemView){
                super(itemView);
                View mView=itemView;

            }

            public void setTitle(String title){
                TextView post_title=(TextView) itemView.findViewById(R.id.textTitle);
                post_title.setText(title);


            }
            public void setDesc(String desc){
                TextView post_desc=(TextView) itemView.findViewById(R.id.textDescription);
                post_desc.setText(desc);



            }

            public void setImage(Context ctx,String image){
                ImageView post_image=(ImageView)itemView.findViewById(R.id.post_image);
    //picasso.with(ctx).load(image).into(post_image);
            }

        }



        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
            int id = item.getItemId();

            //noinspection SimplifiableIfStatement
            if (id == R.id.action_settings) {
                return true;
            }
            else if(id==R.id.addIcon){
                Intent intent=new Intent(MainActivity.this,postActivity.class);
                startActivity(intent);
        enter code here
            }
            else if (id==R.id.logout){
                mAuth.signOut();
            }
            return super.onOptionsItemSelected(item);
        }
    }

FirebaserecyclerAdapter不起作用

0 个答案: