我有一個警報對話框，我為此警報對話框使用了自定義布局，在這個自定義布局中，我有一個 TextView，那么如何從 MainActivity 類中為這個 TextView 設置文本？這是我的代碼：class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) var btn_ShowAlert =findViewById<Button>(R.id.Button) btn_ShowAlert.setOnClickListener { txtlyric.text ="this Textview is all the problem xD " val dialog = AlertDialog.Builder(this) val dialogView = layoutInflater.inflate(R.layout.lyric,null) dialog.setView(dialogView) dialog.setCancelable(true) dialog.show() } }
2 回答
牛魔王的故事
TA貢獻1830條經驗 獲得超3個贊
我建議使用 DialogFragment 并將必要的值傳遞給構造函數
public class MyAlertDialogFragment extends DialogFragment {
public static final String TITLE = "dataKey";
public static MyAlertDialogFragment newInstance(String dataToShow) {
MyAlertDialogFragment frag = new MyAlertDialogFragment();
Bundle args = new Bundle();
args.putString(TITLE, dataToShow);
frag.setArguments(args);
return frag;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
String mDataRecieved = getArguments().getString(TITLE,"defaultTitle");
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View view = inflater.inflate(R.layout.alert_layout, null);
TextView mTextView = (TextView) view.findViewById(R.id.textview);
mTextView.setText(mDataRecieved);
setCancelable(false);
builder.setView(view);
Dialog dialog = builder.create();
dialog.getWindow().setBackgroundDrawable(
new ColorDrawable(Color.TRANSPARENT));
return dialog;
}
}
添加回答
舉報
0/150
提交
取消