FileChooserDialog.java 文件源码

@SuppressWarnings("ConstantConditions")
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
      && ContextCompat.checkSelfPermission(
              getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE)
          != PackageManager.PERMISSION_GRANTED) {
    return new MaterialDialog.Builder(getActivity())
        .title(R.string.md_error_label)
        .content(R.string.md_storage_perm_error)
        .positiveText(android.R.string.ok)
        .build();
  }

  if (getArguments() == null || !getArguments().containsKey("builder")) {
    throw new IllegalStateException("You must create a FileChooserDialog using the Builder.");
  }
  if (!getArguments().containsKey("current_path")) {
    getArguments().putString("current_path", getBuilder().initialPath);
  }
  parentFolder = new File(getArguments().getString("current_path"));
  checkIfCanGoUp();
  parentContents = listFiles(getBuilder().mimeType, getBuilder().extensions);
  return new MaterialDialog.Builder(getActivity())
      .title(parentFolder.getAbsolutePath())
      .typeface(getBuilder().mediumFont, getBuilder().regularFont)
      .items(getContentsArray())
      .itemsCallback(this)
      .onNegative(
          new MaterialDialog.SingleButtonCallback() {
            @Override
            public void onClick(MaterialDialog dialog, DialogAction which) {
              dialog.dismiss();
            }
          })
      .autoDismiss(false)
      .negativeText(getBuilder().cancelButton)
      .build();
}