4.12

所花时间：4小时

代码量：63

博客篇：1

fragment学习

package com.example.subway;

import static android.content.Context.MODE_PRIVATE;

import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentActivity;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Spinner;

import java.sql.SQLException;

/**
 * A simple {@link Fragment} subclass.
 * Use the {@link Fragment1#newInstance} factory method to
 * create an instance of this fragment.
 */
public class Fragment1 extends Fragment {

    // TODO: Rename parameter arguments, choose names that match
    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
    private static final String ARG_PARAM1 = "param1";
    private static final String ARG_PARAM2 = "param2";

    // TODO: Rename and change types of parameters
    private String mParam1;
    private String mParam2;
    private Spinner sp_line;
    private Button bt1;
    private View view;

    public Fragment1() {
        // Required empty public constructor
    }

    /**
     * Use this factory method to create a new instance of
     * this fragment using the provided parameters.
     *
     * @param param1 Parameter 1.
     * @param param2 Parameter 2.
     * @return A new instance of fragment Fragment1.
     */
    // TODO: Rename and change types and number of parameters
    public static Fragment1 newInstance(String param1, String param2) {
        Fragment1 fragment = new Fragment1();
        Bundle args = new Bundle();
        args.putString(ARG_PARAM1, param1);
        args.putString(ARG_PARAM2, param2);
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            mParam1 = getArguments().getString(ARG_PARAM1);
            mParam2 = getArguments().getString(ARG_PARAM2);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.fragment_1,null);
        bt1 = view.findViewById(R.id.btn_1);
        sp_line = view.findViewById(R.id.sp_line);
        bt1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String p=sp_line.getSelectedItem().toString();
                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        Dao d=new Dao();
                        String s="";
                        try {
                            s=d.lineCheck(p);
                        } catch (SQLException e) {
                            throw new RuntimeException(e);
                        }
                        SharedPreferences sharedPreferences = getContext().getSharedPreferences("data",MODE_PRIVATE);
                        SharedPreferences.Editor editor = sharedPreferences.edit();
                        editor.putString("result",s);
                        editor.commit();
                        startActivity(new Intent(getActivity(),result.class));
                    }
                }).start();
            }
        });
        return view;
    }
}