Java FirebaserecyclerAdapter不工作
我在构建gradle时遇到以下错误。我不知道该怎么办请大家帮帮我,但这个问题是在早期将studio从2.3升级到3.0.1后出现的,当时运行良好,但现在失败了 我使用的studio 2.3未检测到错误,但在更新后会出现此错误。当我同步项目时,未在任何依赖项中检测到错误,但当我转到运行/生成时,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 找到:类、int、类、数据库引用 原因:实际参数列表和正式参数列表长度不同 其中T、VH为类型变量: T扩展类FirebaseRecyclerAdapter中声明的对象 VH扩展类FirebaseRecyclerAdapter中声明的ViewHolder 错误:(74,11)错误:不是抽象的,并且不会覆盖FirebaseRecyclerAdapter中BindViewHolder(InstaViewHolder,int,Insta)上的抽象方法 错误:(81,13)错误:方法不重写或实现超类型中的方法 错误:任务“:app:compiledBugJavaWithJavaC”的执行失败 我的主要activity.java代码如下:Java FirebaserecyclerAdapter不工作,java,android,android-studio,Java,Android,Android Studio,我在构建gradle时遇到以下错误。我不知道该怎么办请大家帮帮我,但这个问题是在早期将studio从2.3升级到3.0.1后出现的,当时运行良好,但现在失败了 我使用的studio 2.3未检测到错误,但在更新后会出现此错误。当我同步项目时,未在任何依赖项中检测到错误,但当我转到运行/生成时,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 找到:类
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);
}
}
package com.example.dunia_technology.suaforum;
导入android.content.Context;
导入android.content.Intent;
导入android.os.Build;
导入android.os.Bundle;
导入android.support.annotation.NonNull;
导入android.support.annotation.RequiresApi;
导入android.support.design.widget.FloatingActionButton;
导入android.support.design.widget.Snackbar;
导入android.support.v7.app.AppActivity;
导入android.support.v7.widget.LinearLayoutManager;
导入android.support.v7.widget.RecyclerView;
导入android.support.v7.widget.Toolbar;
导入android.view.view;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.widget.ImageView;
导入android.widget.TextView;
导入com.firebase.ui.database.FirebaseRecyclerAdapter;
导入com.google.firebase.auth.FirebaseAuth;
导入com.google.firebase.database.DatabaseReference;
导入com.google.firebase.database.FirebaseDatabase;
公共类MainActivity扩展了AppCompatActivity{
私人回收站;
私有数据库参考数据库;
私人消防队;
私有FirebaseAuth.AuthStateListener mAuthListener;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar Toolbar=(Toolbar)findViewById(R.id.Toolbar);
设置支持操作栏(工具栏);
mInstaList=(RecyclerView)findViewById(R.id.insta_列表);
mInstaList.setHasFixedSize(true);
mInstaList.setLayoutManager(新的LinearLayoutManager(本));
mDatabase=FirebaseDatabase.getInstance().getReference().child(“InstaApp”);
mAuth=FirebaseAuth.getInstance();
mAuthListener=new FirebaseAuth.AuthStateListener(){
@凌驾
AuthStateChanged上的公共void(@NonNull FirebaseAuth FirebaseAuth){
如果(firebaseAuth.getCurrentUser()==null){
Intent loginIntent=newintent(MainActivity.this,RegisterActivity.class);
添加标志(意图、标志、活动、清除任务);
startActivity(登录);
}
}
};
}
@RequiresApi(api=Build.VERSION\u CODES.GINGERBREAD)
@凌驾
受保护的void onStart(){
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
FirebaseRecyclerAdapter FBRA=新的FirebaseRecyclerAdapter(
安装类,
R.layout.insta_row,
InstaViewHolder.class,
mDatabase
) {
@凌驾
受保护的void populateViewHolder(InstaViewHolder viewHolder、Insta型号、int位置){
setTitle(model.getTitle());
setDesc(model.getDesc());
setImage(getApplicationContext(),model.getImage());
}
};
mInstaList.setAdapter(FBRA);
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(右菜单菜单菜单主菜单);
返回true;
}
公共静态类InstaViewHolder扩展了RecyclerView.ViewHolder{
公共InstaViewHolder(查看项目视图){
超级(项目视图);
视图mView=项目视图;
}
公共无效集合标题(字符串标题){
TextView post_title=(TextView)itemView.findViewById(R.id.textTitle);
post_title.setText(title);
}
公共void setDesc(字符串desc){
TextView post_desc=(TextView)itemView.findViewById(R.id.textDescription);
后描述设置文本(描述);
}
公共void setImage(上下文ctx,字符串图像){
ImageView post_image=(ImageView)itemView.findViewById(R.id.post_image);
//毕加索.with(ctx).load(image).into(post_image);
}
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
if(id==R.id.action\u设置){
返回true;
}