[안드로이드] 스튜디오 권한 요청하기

private final int PERMISSIONS_REQUEST_RESULT = 1;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(this,Manifest.permission.READ_EXTERNAL_STORAGE)) {
                //권한을 거절하면 재 요청을 하는 함수
            } else {
                ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, PERMISSIONS_REQUEST_RESULT);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        if (PERMISSIONS_REQUEST_RESULT == requestCode) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                Toast.makeText(this, "권한 요청이 됐습니다.", Toast.LENGTH_SHORT).show();
            } else {
                Toast.makeText(this, "권한 요청을 해주세요.", Toast.LENGTH_SHORT).show();
                finish();
            }
            return;
        }
    }

그리고 매니페스트에

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

추가 해주면 권한 요청이 완료된다.