ANDROID - setOnDismissListener在一個DialogFragment上

我有一個DialogFragment用於顯示TimePickerDialog時按下button，我想將按鈕的文本更改爲新的時間設置。ANDROID - setOnDismissListener在一個DialogFragment上

我的問題是我不能在DialogFragment上撥打setOnDismissListener從我的Activity。

這是我DialogDragment

public class TimePickerFragment extends DialogFragment 
     implements TimePickerDialog.OnTimeSetListener { 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     int hour = Application.getSettings().getInt("hour", 11); 
     int minute = Application.getSettings().getInt("minute", 11); 

     // Create a new instance of TimePickerDialog and return it 
     return new TimePickerDialog(getActivity(), this, hour, minute, 
       DateFormat.is24HourFormat(getActivity())); 
    } 

    @Override 
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
     FirstTimeLaunchSettingsActivity.hours = hourOfDay; 
     FirstTimeLaunchSettingsActivity.minutes = minute; 

    } 
}

這是我怎麼稱呼這個DialogFragment

public void showTimePickerDialog(View v) { 
    DialogFragment newFragment = new TimePickerFragment(); 
    newFragment.show(this.getFragmentManager(), "timePicker"); 
}

我已經想在我activity製作Handler這將refresh的Activity每次都是，但那不是我想解決問題的方法。

我只想當我關閉我的DialogFragment時，我的按鈕被設置爲我輸入的時間。

感謝您的幫助。

來源

2016-06-14 HypnoZ

[DialogFragment and onDismiss]（http：// stackoverflow。com/questions/23786033/dialogfragment-and-ondismiss） –

您可以覆蓋onDismiss(DialogInterface dialog)方法，該方法將在DialogFragment解散時調用。你也可以做到這一點，從您的活動與內聯控：

public void showTimePickerDialog(View v) { 
    DialogFragment newFragment = new TimePickerFragment() { 
     @Override 
     public void onDismiss(DialogInterface dialog){ 
      // Add your code here 
     } 
    }; 
    newFragment.show(this.getFragmentManager(), "timePicker"); 
}

來源

2016-06-14 10:35:40

謝謝，這工作得很好！ – HypnoZ

Android Studio給了我一個非常好的警告/錯誤：碎片應該是靜態的！否則，它們不能重複使用，例如改變方向後......這可能似乎有效，但可能會導致更多問題 – metinkale38

這只是一個簡短的例子。您可以創建一個非內聯類，並以相同的方式覆蓋它。 –

你可以直接做你已經實現了onTimeSet方法內。你可以在TimePicker視圖被嵌入的活動和更新按鈕文本

@Override 
public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
    FirstTimeLaunchSettingsActivity.hours = hourOfDay; 
    FirstTimeLaunchSettingsActivity.minutes = minute; 

    YourActivityClass activity = (YourActivityClass) getActivity(); 
    activity.updateButton(hourOfDay + ":" + (minute<10?"0"+minute:minute)); 
}

然後，你的活動YourActivityClass裏面，你可以更新的按鈕，像往常一樣：

public void updateButton(String newText) { 
    Button yourButton = (Button) findViewById(R.id.yourButtonID); 
    yourButton.setText(newText); 
}

來源

2016-06-14 10:39:12 devnull69

I can't call setOnDismissListener on the DialogFragment from my Activity.

你可以，所有你需要做的就是在你的活動中實現界面

然後讓你的活動執行OnDismissListener

public final class YourActivity extends AppCompatActivity implements DialogInterface.OnDismissListener { 

    @Override 
    public void onDismiss(final DialogInterface dialog) { 
     //Fragment dialog had been dismissed 
    } 
}

然後只需重寫片段中的onDismiss偵聽器並調用Activity。

public final class DialogFragmentImage extends DialogFragment { 
    @Override 
    public void onDismiss(final DialogInterface dialog) { 
     super.onDismiss(dialog); 
     final Activity activity = getActivity(); 
     if (activity instanceof DialogInterface.OnDismissListener) { 
      ((DialogInterface.OnDismissListener) activity).onDismiss(dialog); 
     } 
    } 

}

來源

2016-06-14 10:42:13 Max

這裏是另一種方式來setOnDismissListener()的對話片段

FragmentManager fm = getFragmentManager(); 

YourDialogFragment dialog = new YourDialogFragment(); 
dialog.show(fm,"Dialog Name"); 

fm.executePendingTransactions(); 
dialog.getDialog().setOnDismissListener(new DialogInterface.OnDismissListener() { 
        @Override 
        public void onDismiss(DialogInterface dialogInterface) { 
         //action when dialog is dismissed goes here 
        } 
       });

爲了確保FragmentTransaction工作已經完成。我們需要調用

fm.executePendingTransactions();

否則NullPointerException可能出現調用setOnDismissListener()時。

來源

2017-02-06 09:59:14

ANDROID - setOnDismissListener在一個DialogFragment上

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