我已经浏览过类似的问题,但尚未找到答案。从 SQL 数据库获取数据后,我最终会添加我的每个 View
,但现在,我只是尝试添加一组 View ,以便让我的布局正常工作。我有一个 fragment 管理器的主要 Activity ,它让我的选项卡流动和加载得很好,所以我认为我不需要在这里提供该代码。
这是 fragment 的代码:
public class EconFragment extends Fragment {
private ViewGroup container;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
populateQuestions(container, inflater);
return inflater.inflate(R.layout.econfragment, container, false);
}
public void onPause() {
super.onPause();
container.removeAllViews();
}
private void populateQuestions(ViewGroup v, LayoutInflater inflater) {
container = v;
int count = 10;
int runner = 0;
while (runner < count) {
View question = inflater.inflate(R.layout.question, null);
question.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
container.addView(question, runner);
runner++;
}
}
}
因此,虽然这应该填充到容器中的多个 Question.xml View 中,但我只显示了一个。有趣的是,我可以观察到延迟,因为运行者增加到计数,但同样,只显示一个问题 View 。当我进行更改时,我的 TableLayout
周围有很多空指针,所以我删除了那部分。
最终,EconFragment
的 xml 有一个带有 ScrollView
的表格布局,后者有另一个 TableLayout
,questionContainer。
我最初希望将每个问题 View 作为一行添加到 questionContainer
中,但这给我带来了各种麻烦。我认为这与在 onCreateView()
?
populateQuestions()
有点相关
最佳答案
这是我解决问题的方法。它没有实现我想要的 SQL dB 访问,它只有一个填充 while 循环和一个虚拟字符串数组来制作表行。我几乎完成了通过 SQL DB 实现登录/注册,一旦完成,通过 SQL 填充这些表行应该不是什么大问题。
public class EconFragment extends Fragment {
private TableLayout questionContainer;
static int pos = 0;
private String[] titles = {"The first title ", "hallo1","hallo2", "hallo3",
"hallo4", "hallo5","hallo6", "hallo7","hallo8", "hallo9"};
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.d("Econ", "onCreateView");
return inflater.inflate(R.layout.econfragment, container, false);
}
public void onResume() {
super.onResume();
LayoutInflater inflater = (LayoutInflater) getActivity().
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
questionContainer = (TableLayout) getActivity().findViewById(R.id.questionContainer);
//these lines are my first attempt to try and get the questions to repopulate after returning
//from pressing back - as of yet, they don't repopulate the screen:
//View econFragment = inflater.inflate(R.layout.econfragment, null);
//container.addView(econFragment);
int leftMargin=5;
int topMargin=5;
int rightMargin=5;
int bottomMargin=5;
while (pos < 10) {
View question = inflater.inflate(R.layout.question, null);
question.setId(pos);
TextView title = (TextView) question.findViewById(R.id.questionTextView);
title.setText(titles[pos]);
Button charts = (Button) question.findViewById(R.id.chartsButton);
charts.setId(pos);
charts.setOnClickListener(chartsListener);
TableRow tr = (TableRow) question;
TableLayout.LayoutParams trParams = new TableLayout.LayoutParams(
TableLayout.LayoutParams.MATCH_PARENT,
TableLayout.LayoutParams.WRAP_CONTENT);
trParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
tr.setLayoutParams(trParams);
questionContainer.addView(tr);
pos++;
}
Log.d("Econ", "onResume");
}
关于android - 在运行时将 View 添加到 fragment 内的 TableLayout,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9693543/