// 示例1: 使用Android SDK 35的CameraX库进行拍照
import androidx.camera.core.CameraSelector;
import androidx.camera.core.ImageCapture;
import androidx.camera.core.ImageCaptureException;
import androidx.camera.lifecycle.ProcessCameraProvider;
import androidx.core.content.ContextCompat;

public class CameraActivity extends AppCompatActivity {
    private ImageCapture imageCapture;

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

    private void startCamera() {
        ProcessCameraProvider cameraProviderFuture = ProcessCameraProvider.getInstance(this);
        cameraProviderFuture.addListener(() -> {
            try {
                ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
                CameraSelector cameraSelector = new CameraSelector.Builder().requireLensFacing(CameraSelector.LENS_FACING_BACK).build();
                imageCapture = new ImageCapture.Builder().build();
                cameraProvider.unbindAll();
                cameraProvider.bindToLifecycle(this, cameraSelector, imageCapture);
            } catch (ExecutionException | InterruptedException e) {
                e.printStackTrace();
            }
        }, ContextCompat.getMainExecutor(this));
    }

    private void takePhoto() {
        File photoFile = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES), "photo.jpg");
        ImageCapture.OutputFileOptions outputOptions = new ImageCapture.OutputFileOptions.Builder(photoFile).build();
        imageCapture.takePicture(outputOptions, ContextCompat.getMainExecutor(this), new ImageCapture.OnImageSavedCallback() {
            @Override
            public void onImageSaved(ImageCapture.OutputFileResults outputFileResults) {
                Toast.makeText(CameraActivity.this, "Photo saved: " + photoFile.getAbsolutePath(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onError(ImageCaptureException exception) {
                Toast.makeText(CameraActivity.this, "Error taking photo: " + exception.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });
    }
} 

// 示例2: 使用Android SDK 35的DataStore进行数据存储
import androidx.datastore.core.DataStore;
import androidx.datastore.preferences.core.Preferences;
import androidx.datastore.preferences.core.preferencesDataStore;
import kotlinx.coroutines.flow.Flow;
import kotlinx.coroutines.flow.map;

public class DataStoreActivity extends AppCompatActivity {
    private final DataStore dataStore = new PreferencesDataStoreFactory().create();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_data_store);
        saveData("key", "value");
        getData("key");
    }

    private void saveData(String key, String value) {
        CoroutineScope(Dispatchers.IO).launch {
            dataStore.edit(preferences -> {
                preferences.put(stringPreferencesKey(key), value);
            });
        }
    }

    private void getData(String key) {
        CoroutineScope(Dispatchers.Main).launch {
            Flow flow = dataStore.data().map(preferences -> preferences.get(stringPreferencesKey(key), ""));
            flow.collect(value -> {
                Toast.makeText(DataStoreActivity.this, "Value: " + value, Toast.LENGTH_SHORT).show();
            });
        }
    }
}