5月28日

课堂作业

简单查询页面app

代码如下：

package com.example.myapplication;

import android.content.Intent;
import android.view.View;
import android.widget.*;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import com.example.myapplication.Bean.Policy;
import com.example.myapplication.Dao.API;
import com.example.myapplication.adapter.PolicyAdapter;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
    List<Policy> List;//定义列表对象存储后端返回的列表
    ListView todayLv;//主页列表
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        todayLv = findViewById(R.id.list_view);
        API api = RetrofitUtils.getRetrofit(AppDataConfig.getURL()).create(API.class);
        api.getlist().enqueue(new Callback<List<Policy>>() {
            @Override
            public void onResponse(Call<List<Policy>> call, Response<List<Policy>> response) {
                if (response.isSuccessful()) {

                    List = response.body();//将前端返回的列表给planList
                    setupListView();
                } else {
                    Toast.makeText(MainActivity.this, "数据显示失败", Toast.LENGTH_SHORT).show();
                }
            }
            @Override
            public void onFailure(Call<List<Policy>> call, Throwable t) {
                System.out.println("请求失败");
                System.out.println(t.getMessage());
            }
        });
        FrameLayout frameLayout1 = findViewById(R.id.frame1);
        FrameLayout frameLayout2 = findViewById(R.id.frame2);
        FrameLayout frameLayout3 = findViewById(R.id.frame3);
        frameLayout1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 点击 frameLayout1 后的操作
                // 您可以在这里获取文本内容并更新列表
                String text1 = ((TextView) frameLayout1.findViewById(R.id.textview)).getText().toString();
                updateListBasedOnText(text1);
            }
        });

        frameLayout2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 点击 frameLayout2 后的操作
                String text2 = ((TextView) frameLayout2.findViewById(R.id.textview)).getText().toString();
                updateListBasedOnText(text2);
            }
        });

        frameLayout3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 点击 frameLayout3 后的操作
                String text3 = ((TextView) frameLayout3.findViewById(R.id.textview)).getText().toString();
                updateListBasedOnText(text3);
            }
        });
        ListView listView = findViewById(R.id.list_view);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id1) {
                Policy item = (Policy) parent.getItemAtPosition(position);
                Intent intent = new Intent(MainActivity.this, Policy1.class);
                intent.putExtra("policy", item.getText());
                startActivity(intent);
            }
        });
    }

    private void updateListBasedOnText(String text) {
        List<Policy> List1=new ArrayList<>();
        if(text.equals("国家"))
        {
            for (Policy policy : List)
            {
                if(policy.getRange1().equals("全国（000000 QG）"))
                    List1.add(policy);
            }
        }
        else if(text.equals("河北"))
        {
            for (Policy policy : List)
            {
                if(policy.getRange1().equals("河北省（130000 HE）"))
                    List1.add(policy);
            }
        }
        else if(text.equals("外省"))
        {
            for (Policy policy : List)
            {
                if(!policy.getRange1().equals("河北省（130000 HE）")&&!policy.getRange1().equals("全国（000000 QG）"))
                    List1.add(policy);
            }
        }
        if (List1 != null) {
            ListAdapter adapter = new PolicyAdapter(MainActivity.this, List1);
            todayLv.setAdapter(adapter);
        }
    }

    private void setupListView() {
        if (List != null) {
            ListAdapter adapter = new PolicyAdapter(MainActivity.this, List);
            todayLv.setAdapter(adapter);
        }
    }
}

package com.example.myapplication;

import android.content.Intent;
import android.webkit.WebView;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;

public class Policy1 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_policy1);
        Intent intent = getIntent();

        String item = intent.getStringExtra("policy");
        WebView webView = findViewById(R.id.webView);
        webView.loadData(item, "text/html", "UTF-8");
    }
}