鸿蒙中的设备权限管理与申请详细示例代码

import ohos.security.SystemPermission;

public class PermissionManager {

    // 检查是否拥有存储权限
    public boolean hasStoragePermission() {
        return SystemPermission.checkPermission(SystemPermission.PERMISSION_READ_USER_STORAGE) 
                == SystemPermission.PERMISSION_GRANTED;
    }

    // 检查是否拥有摄像头权限
    public boolean hasCameraPermission() {
        return SystemPermission.checkPermission(SystemPermission.PERMISSION_CAMERA) 
                == SystemPermission.PERMISSION_GRANTED;
    }
}

import ohos.security.SystemPermission;
import ohos.app.Context;

public class PermissionManager {

    // 动态请求存储权限
    public void requestStoragePermission(Context context) {
        if (!hasStoragePermission()) {
            // 请求存储权限
            context.requestPermissionsFromUser(new String[]{SystemPermission.PERMISSION_READ_USER_STORAGE},
                    1001);  // 请求代码
        }
    }

    // 动态请求摄像头权限
    public void requestCameraPermission(Context context) {
        if (!hasCameraPermission()) {
            // 请求摄像头权限
            context.requestPermissionsFromUser(new String[]{SystemPermission.PERMISSION_CAMERA},
                    1002);  // 请求代码
        }
    }
}

import ohos.security.SystemPermission;
import ohos.app.Context;
import ohos.app.dispatcher.task.TaskDispatcher;

public class PermissionRequestCallback {

    // 权限请求回调处理
    public void onPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == 1001) {
            if (grantResults[0] == SystemPermission.PERMISSION_GRANTED) {
                // 存储权限被授予
                System.out.println("Storage permission granted.");
            } else {
                // 存储权限被拒绝
                System.out.println("Storage permission denied.");
            }
        } else if (requestCode == 1002) {
            if (grantResults[0] == SystemPermission.PERMISSION_GRANTED) {
                // 摄像头权限被授予
                System.out.println("Camera permission granted.");
            } else {
                // 摄像头权限被拒绝
                System.out.println("Camera permission denied.");
            }
        }
    }
}

import ohos.security.SystemPermission;
import ohos.app.Context;
import ohos.app.Component;
import ohos.app.dispatcher.task.TaskDispatcher;

public class PermissionRequestExample {

    private PermissionManager permissionManager;
    private PermissionRequestCallback permissionRequestCallback;

    public PermissionRequestExample(Context context) {
        permissionManager = new PermissionManager();
        permissionRequestCallback = new PermissionRequestCallback();
    }

    // 检查并请求存储权限
    public void checkAndRequestStoragePermission(Context context) {
        if (!permissionManager.hasStoragePermission()) {
            permissionManager.requestStoragePermission(context);
        } else {
            System.out.println("Storage permission already granted.");
        }
    }

    // 检查并请求摄像头权限
    public void checkAndRequestCameraPermission(Context context) {
        if (!permissionManager.hasCameraPermission()) {
            permissionManager.requestCameraPermission(context);
        } else {
            System.out.println("Camera permission already granted.");
        }
    }

    // 权限结果处理回调
    public void onPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        permissionRequestCallback.onPermissionsResult(requestCode, permissions, grantResults);
    }
}