Question

我已经阅读了很多关于如何将FragmentDialog与活动进行通信的教程，但我似乎无法使它们适应我的项目。

我想要做的很简单，当用户点击我的FragmentDialog上的正按钮时，我想在主要活动中调用一个方法。一个简单的想法，但执行正在扼杀我。

我的主要活动使用选项卡式浏览，我的事情就是弄乱了这个洞。

这是我主要活动的简短版本。

public class MainActivity extends ActionBarActivity implements ActionBar.TabListener  {

   //.....

    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement

        if(id == R.id.menu_change_date){
            DialogFragment dialog = new Dialog_Elegir_Mes();
            dialog.show(getSupportFragmentManager(),"Elegir Mes");
        }

  //....

  public void dosomething() {

   }

 }

对话框

public class Dialog_Elegir_Mes extends DialogFragment {

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        // Build the dialog and set up the button click handlers
        AlertDialog.Builder adb = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = getActivity().getLayoutInflater();

        final View v = inflater.inflate(R.layout.diag_select_month,null);


        adb.setTitle("Elegir Mes");

        adb.setView(v)
                .setPositiveButton("Aceptar", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {

                          //Here call dosomething();
                    }
                })
                .setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        Dialog_Elegir_Mes.this.getDialog().cancel();
                    }
                });


        return adb.create();
    }
}

Answer 1

创建一个接口并在Activity类中实现它，并将其引用传递给Dialog类。当用户单击对话框按钮时，使用界面调用该方法。

做这样的事情

public interface OnMyDialogClick
{
    public abstract void onPositiveButtonClick();
}

您的活动

if(id == R.id.menu_change_date){
        DialogFragment dialog = new Dialog_Elegir_Mes(new OnMyDialogClick()
        {
              @Override
              public void onPositiveButtonClick()
              {
                   //Call your activity method here
              }
        });
        dialog.show(getSupportFragmentManager(),"Elegir Mes");
}

您的对话类

public class Dialog_Elegir_Mes extends DialogFragment {
private OnMyDialogClick _onMyDialogClick = null;
public Dialog_Elegir_Mes(OnMyDialogClick ref)
{
    _onMyDialogClick = ref;
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Build the dialog and set up the button click handlers
    AlertDialog.Builder adb = new AlertDialog.Builder(getActivity());
    LayoutInflater inflater = getActivity().getLayoutInflater();

    final View v = inflater.inflate(R.layout.diag_select_month,null);


    adb.setTitle("Elegir Mes");

    adb.setView(v)
            .setPositiveButton("Aceptar", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {

                      _onMyDialogClick.onPositiveButtonClick();
                }
            })
            .setNegativeButton("Cancelar", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    Dialog_Elegir_Mes.this.getDialog().cancel();
                }
            });


    return adb.create();
}
}

用主要活动传达我的对话框

1 个答案: