背景

startActivityForResult(Intent,int) での画像選択コードが deprecated と言われるので、修正前後のコード例を残しておく。

コード

修正前

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private final static int RESULT_PICK_IMAGEFILE = 1000;

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent resultData) {
        super.onActivityResult(requestCode, resultCode, resultData);

        if (requestCode == RESULT_PICK_IMAGEFILE && resultCode == RESULT_OK) {
            if (resultData != null) {
                Uri uri = resultData.getData();

                // Do something here.
            }
        }
    }

    private void onSelectImage() {

        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("image/*");
        intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);

        startActivityForResult(intent, RESULT_PICK_IMAGEFILE); // deprecated!!
    }
}

修正後

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    ActivityResultLauncher<Intent> _launcherSelectSingleImage = registerForActivityResult(
            new ActivityResultContracts.StartActivityForResult(),
            new ActivityResultCallback<ActivityResult>() {
                @Override
                public void onActivityResult(ActivityResult result) {
                    if (result.getResultCode() == RESULT_OK) {
                        Intent      resultData = result.getData();
                        if (resultData != null) {
                            Uri uri = resultData.getData();

														// Do something here.
                        }
                    }
                }
            });


    private void onSelectImage() {

        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
        intent.addCategory(Intent.CATEGORY_OPENABLE);
        intent.setType("image/*");
        intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
        Intent chooserIntent = Intent.createChooser(intent, "単一画像の選択");

        _launcherSelectSingleImage.launch(chooserIntent);
    }
}

参考リンク