android实现一个使用和风天气APL来自主获得获取天气预报功能的代码和布局文件

以下是一个简单的示例代码和布局文件，使用和风天气API获取天气预报信息：

1. 在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.INTERNET"/>

2. 在 build.gradle 文件中添加以下依赖项：

implementation 'com.squareup.okhttp3:okhttp:4.9.1'
implementation 'com.google.code.gson:gson:2.8.6'

3. 创建一个布局文件，例如 activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="16dp">

   <TextView
       android:id="@+id/tv_city"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:text="City"
       android:textSize="24sp"
       android:textStyle="bold"/>

   <TextView
       android:id="@+id/tv_weather"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_below="@id/tv_city"
       android:textSize="18sp"/>

   <TextView
       android:id="@+id/tv_temperature"
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:layout_below="@id/tv_weather"
       android:textSize="18sp"/>

</RelativeLayout>

4. 在 MainActivity.java 文件中添加以下代码：

import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

import com.google.gson.Gson;
import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;

import java.io.IOException;

public class MainActivity extends AppCompatActivity {

   private static final String TAG = "MainActivity";

   private TextView tvCity;
   private TextView tvWeather;
   private TextView tvTemperature;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       tvCity = findViewById(R.id.tv_city);
       tvWeather = findViewById(R.id.tv_weather);
       tvTemperature = findViewById(R.id.tv_temperature);

       // Replace YOUR_API_KEY with your own API key from https://dev.heweather.com/
       String apiKey = "YOUR_API_KEY";
       String city = "Beijing"; // Replace with your own city name

       OkHttpClient client = new OkHttpClient();
       Request request = new Request.Builder()
               .url("https://devapi.qweather.com/v7/weather/now?key=" + apiKey + "&location=" + city)
               .build();

       Call call = client.newCall(request);
       call.enqueue(new Callback() {
           @Override
           public void onFailure(Request request, IOException e) {
               Log.e(TAG, "Failed to get weather data", e);
           }

           @Override
           public void onResponse(Response response) throws IOException {
               String json = response.body().string();
               Log.d(TAG, json);
               WeatherResponse weatherResponse = new Gson().fromJson(json, WeatherResponse.class);
               runOnUiThread(() -> {
                   tvCity.setText(weatherResponse.getLocation().getName());
                   tvWeather.setText(weatherResponse.getNow().getText());
                   tvTemperature.setText(weatherResponse.getNow().getTemp() + "℃");
               });
           }
       });
   }
}

5. 创建一个类 WeatherResponse.java，用于解析 API 响应：

public class WeatherResponse {

   private Location location;
   private Now now;

   public Location getLocation() {
       return location;
   }

   public void setLocation(Location location) {
       this.location = location;
   }

   public Now getNow() {
       return now;
   }

   public void setNow(Now now) {
       this.now = now;
   }

   public static class Location {
       private String name;

       public String getName() {
           return name;
       }

       public void setName(String name) {
           this.name = name;
       }
   }

   public static class Now {
       private String text;
       private String temp;

       public String getText() {
           return text;
       }

       public void setText(String text) {
           this.text = text;
       }

       public String getTemp() {
           return temp;
       }

       public void setTemp(String temp) {
           this.temp = temp;
       }
   }
}

这个示例代码使用 OkHttpClient 发起 HTTP 请求，并使用 Gson 库解析 JSON 响应。在 onResponse 回调中，我们更新 UI 界面显示城市名、天气状态和温度。

请注意：这个示例代码仅供参考，实际项目中需要根据自己的需求进行修改和完善。