Question

我创建了一个ImageView，希望通过单击它可以将我从一项活动转到另一项活动。

我输入了以下代码，但是编译器在说：“错误：找不到符号方法findViewById（int）”。如果您能帮助我解决这个问题，我将不胜感激。

我的代码：

package com.androidcodefinder.loginscreendemo.Catalysts;

import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.androidcodefinder.loginscreendemo.MainActivity;
import com.androidcodefinder.loginscreendemo.R;
import com.androidcodefinder.loginscreendemo.SignUpActivity;
import com.androidcodefinder.loginscreendemo.postpg;

public class AIFragment extends android.support.v4.app.Fragment {
    private static final String TAG = "AIFragments";
    private ImageView imageView;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_ai, container, false);
        return view;
       imageView=(ImageView)findViewById(R.id.savage);
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(getActivity(),postpg.class);
                startActivity(intent);
            }
        });
    }
}

Answer 1

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
       View view = inflater.inflate(R.layout.fragment_ai, container, false);

       imageView=(ImageView)view.findViewById(R.id.savage);
       imageView.setOnClickListener((view) -> {
                Intent intent = new Intent(getActivity(),postpg.class);
                startActivity(intent);
            }
        });

       return view;
    }

函数findViewById是在视图上定义的。使用您正在膨胀的视图。我还将click-Listener更改为lambda函数，因为它更易于阅读。

或使用旧语法：

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
       View view = inflater.inflate(R.layout.fragment_ai, container, false);

       imageView=(ImageView)view.findViewById(R.id.savage);
       imageView.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View view) {
             Intent intent = new Intent(getActivity(),postpg.class);
             startActivity(intent);
         }
        });

       return view;
    }

如何修复“错误：找不到符号方法findViewById（int）”错误？

1 个答案: