警报对话框未显示。只有空白页面即将到来

Question

民间，

我创建了一个对话框片段，它将显示带铃声的Dialog。但是，铃声正在播放，白色空白页面即将到来。

请指导我哪里出错了。

AlarmDialog.java

public class AlarmDialogPopUp extends Activity {

    Ringtone ringtone;
    Long rowId;Constants.TableTypes fragType;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Activity activity = this;

        Intent intent = getIntent();
        rowId = intent.getExtras().getLong(DatabaseHandler1.KEY_ID);
        fragType = (Constants.TableTypes) intent.getExtras().get(DatabaseHandler1.fragmentidenifier);


        // Get the alarm ID from the intent extra data

        Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        ringtone = RingtoneManager.getRingtone(AlarmDialogPopUp.this, uri);
        ringtone.play();

         }
        @Override
        protected Dialog onCreateDialog ( int id)
        {
            super.onCreateDialog(id);

            // Build the dialog
            final AlertDialog.Builder alert = new AlertDialog.Builder(this);

            alert.setTitle("ALARM REMINDER");
            alert.setMessage("Check Your Reminder");
            alert.setCancelable(false);

            alert.setPositiveButton("Dismiss", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                    ringtone.stop();
                    // Constants.TableTypes fragType = (Constants.TableTypes) intent.getExtras().get(DatabaseHandler1.fragmentidenifier)

                    Intent intent = new Intent(AlarmDialogPopUp.this, PostClickNotificationActivity.class);
                    //intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
                    //getApplicationContext().startActivity(notificationIntent);
                    intent.putExtra(DatabaseHandler1.KEY_ID, rowId);
                    intent.putExtra(DatabaseHandler1.fragmentidenifier, fragType);
                    startActivity(intent);

                    AlarmDialogPopUp.this.finish();

                }


            });

            // Create and return the dialog
            AlertDialog dlg = alert.create();
            //dlg.show();
            dlg.show();
            return dlg;
        }
    }

我已尝试过create method，show（）其他帖子中提到的所有内容。但是，它不起作用。它响了，一页空白。

Answer 1

在onCreate方法中显示您的对话框，如下所示

public class AlarmDialogPopUp extends Activity {

    Ringtone ringtone;
    Long rowId;Constants.TableTypes fragType;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final Activity activity = this;

        Intent intent = getIntent();
        rowId = intent.getExtras().getLong(DatabaseHandler1.KEY_ID);
        fragType = (Constants.TableTypes) intent.getExtras().get(DatabaseHandler1.fragmentidenifier);


        // Get the alarm ID from the intent extra data

        Uri uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_ALARM);
        ringtone = RingtoneManager.getRingtone(AlarmDialogPopUp.this, uri);
        ringtone.play();
         displayDialog();
         }

        public void displayDialog()
        {

            // Build the dialog
            final AlertDialog.Builder alert = new AlertDialog.Builder(AlarmDialogPopUp.this);

            alert.setTitle("ALARM REMINDER");
            alert.setMessage("Check Your Reminder");
            alert.setCancelable(false);

            alert.setPositiveButton("Dismiss", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int whichButton) {
                    ringtone.stop();
                    // Constants.TableTypes fragType = (Constants.TableTypes) intent.getExtras().get(DatabaseHandler1.fragmentidenifier)

                    Intent intent = new Intent(AlarmDialogPopUp.this, PostClickNotificationActivity.class);
                    //intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK );
                    //getApplicationContext().startActivity(notificationIntent);
                    intent.putExtra(DatabaseHandler1.KEY_ID, rowId);
                    intent.putExtra(DatabaseHandler1.fragmentidenifier, fragType);
                    startActivity(intent);

                    finish();

                }


            });

            alert.show();

        }
    }

Answer 2

class="form-control" ......这是错的。通常，您正在调用活动的dlg.show();方法。但是这已被弃用，您应该创建自己的对话框，或使用showDialog(int)

删除DialogFragment内的dlg.show()，并在onCreateDialog()中调用showDialog(0)。

Using DialogFragment