AlertDialog.Builder builder = new AlertDialog.Builder(this); AlertDialog dialog = builder.show(); dialog.dismiss(); 

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());builder.setTitle("測試");LayoutInflater inflater = getActivity().getLayoutInflater();View view = inflater.inflate(R.layout.dialogfragment_num_input, null);builder.setView(view);builder.setPositiveButton("確定",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int id) {Field field = null;try {//通過反射獲取dialog中的私有屬性mShowingfield = dialog.getClass().getSuperclass().getDeclaredField("mShowing");field.setAccessible(true);//設置該屬性可以訪問} catch (Exception ex) {}String inputValue = String.valueOf(mEdit.getText());if (inputValue == null || "".equals(inputValue)) {try {//設置dialog不可關閉field.set(dialog, false);dialog.dismiss();} catch (Exception ex) {}} else {////做自己的事//try {//關閉field.set(dialog, true);dialog.dismiss();} catch (Exception ex) {}}}});builder.setNegativeButton("取消",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int id) {Field field = null;try {//通過反射獲取dialog中的私有屬性mShowingfield = dialog.getClass().getSuperclass().getDeclaredField("mShowing");field.setAccessible(true);//設置該屬性可以訪問} catch (Exception ex) {}try {field.set(dialog, true);dialog.dismiss();} catch (Exception ex) {}}});builder.create();