dpdb/code/main/java/com/example/dxsdpdb/IndexFragment.java

package com.example.dxsdpdb;

import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.Toast;

import androidx.fragment.app.Fragment;

public class IndexFragment extends Fragment {
    private View view = null;
    private Button submit_buttion,accept_button;
    private ImageButton market_button,losing_button,college_button;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        if (view==null){
            view= inflater.inflate(R.layout.fragment_index,container,false);
            submit_buttion = view.findViewById(R.id.raise_button);
            accept_button = view.findViewById(R.id.accept_button);
            market_button = view.findViewById(R.id.market_button);
            losing_button = view.findViewById(R.id.losing_button);
            college_button = view.findViewById(R.id.college_buttion);
            initEvents();
        }
        return view;
    }
    private void initEvents() {
        View.OnClickListener onClickListener = new View.OnClickListener() {
            public void onClick(View v) {
                switch (v.getId()) {
                    case R.id.raise_button:
                        ;
                        break;
                    case R.id.accept_button:
                        ;
                        break;
                    case R.id.market_button:
                        Toast.makeText(getActivity(),"此功能暂未开放！",Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.losing_button:
                        Toast.makeText(getActivity(),"此功能暂未开放！",Toast.LENGTH_SHORT).show();
                        break;
                    case R.id.college_buttion:
                        Toast.makeText(getActivity(),"此功能暂未开放！",Toast.LENGTH_SHORT).show();
                        break;

                }
            }};
        //设置三个 Tab 的点击事件
        submit_buttion.setOnClickListener(onClickListener);
        accept_button.setOnClickListener(onClickListener);
        market_button.setOnClickListener(onClickListener);
        losing_button.setOnClickListener(onClickListener);
        college_button.setOnClickListener(onClickListener);
    }
}