这是我的MainActivity代码
package com.proj.hex.hoop;
import android.content.Context;
import android.content.Intent;
import android.media.Image;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.firebase.ui.database.FirebaseRecyclerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.squareup.picasso.Picasso;
public class MainActivity extends AppCompatActivity {
private RecyclerView mBlogList;
private DatabaseReference mRef;
private FirebaseRecyclerAdapter<Blog, BlogViewHolder> mrecyclerAdapter;
private FirebaseAuth mAuth;
private FirebaseAuth.AuthStateListener mAuthListener;
//Created on 18/1/2018 Faiz
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAuth = FirebaseAuth.getInstance();
mAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
if (firebaseAuth.getCurrentUser() == null){
Intent loginIntent = new Intent(MainActivity.this, Registration.class);
loginIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(loginIntent);
}
}
};
mRef = FirebaseDatabase.getInstance().getReference();
mBlogList = (RecyclerView) findViewById(R.id.blog_list);
mBlogList.setHasFixedSize(true);
mBlogList.setLayoutManager(new LinearLayoutManager(this));
FirebaseRecyclerOptions<Blog> options;
options = new FirebaseRecyclerOptions.Builder<Blog>()
.setQuery(mRef, Blog.class)
.build();
FirebaseRecyclerOptions<BlogViewHolder> options1;
options1 = new FirebaseRecyclerOptions.Builder<BlogViewHolder>()
.setQuery(mRef, BlogViewHolder.class)
.build();
}
@Override
protected void onStart(){
super.onStart();
mAuth.addAuthStateListener(mAuthListener);
FirebaseRecyclerAdapter<Blog, BlogViewHolder> adapter = new FirebaseRecyclerAdapter<Blog, BlogViewHolder>(
Blog.class,
BlogViewHolder.class,
R.layout.blog_row,
mRef)
{
@Override
protected void onBindViewHolder(@NonNull BlogViewHolder holder, int position, @NonNull Blog model) {
holder.setTitle(model.getTitle());
holder.setDesc(model.getDesc());
holder.setImage(getApplicationContext(), model.getImage());
}
@Override
public BlogViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return null;
}
protected void populateViewHolder(BlogViewHolder viewHolder, Blog model, int position){
viewHolder.setTitle(model.getTitle());
viewHolder.setDesc(model.getDesc());
viewHolder.setImage(getApplicationContext(), model.getImage());
}
};
mBlogList.setAdapter(adapter);
}
public static class BlogViewHolder extends RecyclerView.ViewHolder{
View mView;
public BlogViewHolder(View itemView) {
super(itemView);
mView = itemView;
}
public void setTitle(String title){
TextView post_title = (TextView) mView.findViewById(R.id.post_title);
post_title.setText(title);
}
public void setDesc(String Desc){
TextView post_des = (TextView) mView.findViewById(R.id.post_desc);
post_des.setText(Desc);
}
public void setImage(Context ctx, String image){
ImageView post_image = (ImageView) mView.findViewById(R.id.post_img);
Picasso.with(ctx).load(image).into(post_image);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.action_add) {
startActivity(new Intent(MainActivity.this, PostActivity.class));
}
if (item.getItemId() == R.id.action_logout){
logout();
}
return super.onOptionsItemSelected(item);
}
private void logout() {
enter code here
mAuth.signOut();
}
}
所以请帮我解决我的问题
FirebaseRecyclerAdapter中的FirebaseRecyclerAdapter（）不能 适用于：预期参数：实际参数：选项： COM ... com.proj.hex.hoop.Blog＆GT; Blog.class（java.lang.Class中）
BlogViewHolder.class（java的... hoop.MainActivity.BlogViewHolder＆GT）
R.layout.blog_row（int）的
MREF（COM ... firebase.database.DatabaseReference）“
在FirebaseRecycleAdapter