java - 从横向/纵向旋转时 DatePickerDialog 关闭

Question

我遇到了 DatePickerDialog 宽度问题，因为当它打开并转动屏幕(横向/纵向)时，对话框会停止。
现在我正在尝试将对话框的状态保存在 Bundle 中，但我真的不知道如何:/

代码:

public class ActivityNeki extends Activity {
    private int datY, datM, datD;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity);
        if(savedInstanceState == null){ setTheData(); writeTheData(); }
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        outState.putInt("izY", datY);
        outState.putInt("izM", datM);
        outState.putInt("izD", datD);

        super.onSaveInstanceState(outState);
    }
    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        datY = savedInstanceState.getInt("izY");
        datM = savedInstanceState.getInt("izM");
        datD = savedInstanceState.getInt("izD");
        writeTheData();
    }

    public void onClickOpenDPD(View view) {    // the method that is caled from XML onClick
        DatePickerDialog dpd = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() {
            @Override public void onDateSet(DatePicker view, int y, int m, int d) {
                datY = y; datM = m; datD = d;
                writeTheData();
            }
        }, datY, datM, datD);
        dpd.show();
    }

    public void setTheData(){
        Calendar c = Calendar.getInstance();
        datY = c.get(Calendar.YEAR);
        datM = c.get(Calendar.MONTH);
        datD = c.get(Calendar.DAY_OF_MONTH);
    }
    public void writeTheData(){
        // writes the data in a txtView
    }

}

因此，如果有人知道如何做到这一点，我会定价!

提前致谢:)

<小时/>

工作解决方案:(Big tnx 到 Taig)

public class ActivityNeki extends FragmentActivity {
    /**
    * the rest of the code
    * is the same...
    * I only edited this method:
    */
    public void onClickOpenDPD(View view) {    // the method that is caled from XML onClick
        class MyDialogFragment extends DialogFragment {
            @Override public void onDestroyView() {
                if (getDialog() != null && getRetainInstance()) getDialog().setDismissMessage(null);
                super.onDestroyView();
            }
            @Override public void onCreate(Bundle state) { super.onCreate(state);
                setRetainInstance(true);
            }
            @Override public Dialog onCreateDialog(Bundle state) {
                DatePickerDialog dpd = new DatePickerDialog( getActivity(), new DatePickerDialog.OnDateSetListener() {
                    @Override public void onDateSet(DatePicker view, int y, int m, int d) {
                        datY = y; datM = m; datD = d;
                        writeTheData();
                } }, datY, datM, datD);
                return dpd;
            }
        }
        newDF = new MyDialogFragment();
        newDF.show( getSupportFragmentManager(), null );
    }
}

Answer 1

如果您可以选择，我建议您使用 DialogFragments。

class MyDialogFragment extends DialogFragment {
    @Override
    public void onCreate( Bundle state ) {
        super.onCreate( state );

        setRetainInstance( true );
    }

    @Override
    public Dialog onCreateDialog( Bundle state ) {
        return new DatePickerDialog( ... );
    }
}

在您的 Activity 中，您可以通过调用 new MyDialogFragment().show( getSupportFragmentManager(), null ) 来启动对话框。对话框将重新打开，您不必自己在方向更改时保留当前选择!