androidx中已弃用的OnActivityResult()

class MainActivity : AppCompatActivity() {

    private val requestPermissionLauncher =
        registerForActivityResult(ActivityResultContracts.RequestPermission()) { isGranted: Boolean ->
            if (isGranted) {
                // Permission is granted. Continue the action or workflow in your app.
            } else {
                // Explain to the user that the feature is unavailable because the
                // features requires a permission that the user has denied.
            }
        }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val requestPermissionButton = findViewById<Button>(R.id.request_permission_button)
        requestPermissionButton.setOnClickListener {
            // Request camera permission
            requestPermissionLauncher.launch(Manifest.permission.CAMERA)
        }
    }
}

// 旧的 OnActivityResult() 方法
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK) {
        val resultData = data?.getStringExtra("result_key")
        // 处理结果
    }
}

// 新的 registerForActivityResult() 方法
private val resultLauncher =
    registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
        if (result.resultCode == Activity.RESULT_OK) {
            val data: Intent? = result.data
            val resultData = data?.getStringExtra("result_key")
            // 处理结果
        }
    }

// 启动 Activity 并获取结果
fun startAnotherActivityForResult() {
    val intent = Intent(this, AnotherActivity::class.java)
    resultLauncher.launch(intent)
}