Android studio 天气预报代码

这里是一个简单的 Android Studio 天气预报代码示例，使用了 OpenWeatherMap API：

1. 在 build.gradle 文件中添加以下依赖项：

implementation 'com.squareup.okhttp3:okhttp:3.10.0'
implementation 'com.google.code.gson:gson:2.8.2'

2. 创建一个 WeatherModel 类，用于存储天气数据：

public class WeatherModel {
    private String cityName;
    private String description;
    private double temperature;
    private String iconUrl;

    public String getCityName() {
        return cityName;
    }

    public void setCityName(String cityName) {
        this.cityName = cityName;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public double getTemperature() {
        return temperature;
    }

    public void setTemperature(double temperature) {
        this.temperature = temperature;
    }

    public String getIconUrl() {
        return iconUrl;
    }

    public void setIconUrl(String iconUrl) {
        this.iconUrl = iconUrl;
    }
}

3. 创建一个 WeatherService 类，用于获取天气数据：

public class WeatherService {
    private static final String BASE_URL = "https://api.openweathermap.org/data/2.5/";
    private static final String APP_ID = "YOUR_APP_ID_HERE";

    private OkHttpClient okHttpClient;
    private Gson gson;

    public WeatherService() {
        okHttpClient = new OkHttpClient();
        gson = new Gson();
    }

    public WeatherModel getWeather(String cityName) throws IOException {
        String url = BASE_URL + "weather?q=" + cityName + "&appid=" + APP_ID + "&units=metric";
        Request request = new Request.Builder().url(url).build();
        Response response = okHttpClient.newCall(request).execute();
        String json = response.body().string();
        WeatherModel model = gson.fromJson(json, WeatherModel.class);
        model.setIconUrl(BASE_URL + "img/w/" + model.getIconUrl() + ".png");
        return model;
    }
}

4. 在 Activity 中使用 WeatherService 获取天气数据并显示：

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";

    private EditText editText;
    private TextView cityNameTextView;
    private TextView temperatureTextView;
    private TextView descriptionTextView;
    private ImageView iconImageView;

    private WeatherService weatherService;

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

        editText = findViewById(R.id.edit_text);
        cityNameTextView = findViewById(R.id.city_name_text_view);
        temperatureTextView = findViewById(R.id.temperature_text_view);
        descriptionTextView = findViewById(R.id.description_text_view);
        iconImageView = findViewById(R.id.icon_image_view);

        weatherService = new WeatherService();
    }

    public void onGetWeatherClick(View view) {
        String cityName = editText.getText().toString().trim();
        if (TextUtils.isEmpty(cityName)) {
            Toast.makeText(this, "Please enter a city name", Toast.LENGTH_SHORT).show();
            return;
        }

        new Thread(() -> {
            try {
                WeatherModel model = weatherService.getWeather(cityName);
                runOnUiThread(() -> {
                    cityNameTextView.setText(model.getCityName());
                    temperatureTextView.setText(getString(R.string.temperature, model.getTemperature()));
                    descriptionTextView.setText(model.getDescription());
                    Picasso.get().load(model.getIconUrl()).into(iconImageView);
                });
            } catch (IOException e) {
                Log.e(TAG, "Failed to get weather", e);
                runOnUiThread(() -> Toast.makeText(this, "Failed to get weather", Toast.LENGTH_SHORT).show());
            }
        }).start();
    }
}

5. 在布局文件中添加以下组件：

<EditText
    android:id="@+id/edit_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Enter City Name"
    android:inputType="text"/>

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Get Weather"
    android:onClick="onGetWeatherClick"/>

<TextView
    android:id="@+id/city_name_text_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="24sp"/>

<TextView
    android:id="@+id/temperature_text_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="48sp"/>

<TextView
    android:id="@+id/description_text_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:textSize="24sp"/>

<ImageView
    android:id="@+id/icon_image_view"
    android:layout_width="100dp"
    android:layout_height="100dp"/>

注意：在 WeatherService 中的 APP_ID 变量应该被替换为您在 OpenWeatherMap 上创建的 API 密钥。