android - 在其他类上覆盖 fun onRequestPermissionsResult

Question

我写了Permission类，这里有askMicrophonePermission方法。

在askMicrophonePermission中，我使用了ActivityCompat.requestPermissions功能。

但我不能覆盖 onRequestPermissionsResult in Permission类。

如果我想在 Permission 中覆盖 onRequestPermissionsResult，而不是在 MainActivity 中。

怎么写？？这是我的代码。

主要 Activity :

class MainActivity : AppCompatActivity() {

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

        Permission().askMicrophonePermission(this@MainActivity)
    }
}

权限:

class Permission{
    private val tag = "Permission message"
    private val userMicrophonePermissionAgreeCode = 1

    fun askMicrophonePermission(context: Context){

        val currentMicrophonePermission = ActivityCompat.checkSelfPermission(context,android.Manifest.permission.RECORD_AUDIO)


        if(currentMicrophonePermission != PackageManager.PERMISSION_GRANTED)
            ActivityCompat.requestPermissions(context as Activity, arrayOf(android.Manifest.permission.RECORD_AUDIO), userMicrophonePermissionAgreeCode)
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        when(requestCode){
            userMicrophonePermissionAgreeCode -> {
                if( grantResults[0] == PackageManager.PERMISSION_GRANTED )
                    Log.i(tag,"Agree microphone permission")
                else
                    Log.i(tag,"Not agree microphone permission")
            }
        }
    }
}

Answer 1

onRequestPermissionsResult 是 FragmentActivity 的一个方法。由于您的 Permission 没有扩展 FragmentActivity，因此您不能直接在 Permission 中覆盖 onRequestPermissionsResult。

您可以将权限结果委托(delegate)给Permission。

class MainActivity : AppCompatActivity() {

    private lateinit var permission: Permission

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

        permission = Permission()
        permission.askMicrophonePermission(this@MainActivity)
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        permission.handlePermissionsResult(resquestCode, permissions, grantResults)
    }
}

权限:

class Permission{
    private val tag = "Permission message"
    private val userMicrophonePermissionAgreeCode = 1

    fun askMicrophonePermission(context: Context){

        val currentMicrophonePermission = ActivityCompat.checkSelfPermission(context,android.Manifest.permission.RECORD_AUDIO)


        if(currentMicrophonePermission != PackageManager.PERMISSION_GRANTED)
            ActivityCompat.requestPermissions(context as Activity, arrayOf(android.Manifest.permission.RECORD_AUDIO), userMicrophonePermissionAgreeCode)
    }

    fun handlePermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        when(requestCode){
            userMicrophonePermissionAgreeCode -> {
                if( grantResults[0] == PackageManager.PERMISSION_GRANTED )
                    Log.i(tag,"Agree microphone permission")
                else
                    Log.i(tag,"Not agree microphone permission")
            }
        }
    }
}