android studio天气预报代码

以下是一个简单的 Android Studio 天气预报应用的代码示例：

import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    private EditText cityEditText;
    private Button getWeatherButton;
    private TextView weatherTextView;

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

        cityEditText = findViewById(R.id.cityEditText);
        getWeatherButton = findViewById(R.id.getWeatherButton);
        weatherTextView = findViewById(R.id.weatherTextView);

        getWeatherButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String city = cityEditText.getText().toString();
                if (!city.isEmpty()) {
                    String url = "http://api.openweathermap.org/data/2.5/weather?q=" + city + "&appid=YOUR_API_KEY";
                    new GetWeatherTask().execute(url);
                }
            }
        });
    }

    private class GetWeatherTask extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... params) {
            String result = "";
            try {
                URL url = new URL(params[0]);
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                StringBuilder response = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
                reader.close();
                result = response.toString();
            } catch (Exception e) {
                e.printStackTrace();
            }
            return result;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            try {
                JSONObject jsonObject = new JSONObject(result);
                JSONObject main = jsonObject.getJSONObject("main");
                double temp = main.getDouble("temp");
                int humidity = main.getInt("humidity");
                weatherTextView.setText("Temperature: " + temp + "°C\nHumidity: " + humidity + "%");
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
}

请注意替换代码中的 `YOUR_API_KEY` 为你自己的 OpenWeatherMap API 密钥。此代码使用 OpenWeatherMap 的 API 来获取天气数据，并在界面上显示温度和湿度信息。

这只是一个简单的示例，你可以根据需要进行修改和扩展。希望对你有所帮助！