使用smoothScrollTo在片段 [英] Use smoothScrollTo in Fragment
问题描述
我有以下情况:
我使用的是抽屉式导航使用户方便地在不同主题之间切换。
您可以在这里找到一个画面:
https://drive.google.com/file/d/ 0B2gMUEFwlGRfSHRzVlptYmFQTXc /编辑?USP =共享
在上点击标题,例如常规的唯一的主要内容视图被替换,通过使用片段和布局文件。
但是,当用户点击一个副标题,例如游戏,布局的变化,它应该向下滚动到布局中specifc视图。
所以在我的片段类我使用了onViewCreated方法和smoothScrollTo方法,通过滚动型提供。滚动视图和RelativeLayout的都是不为空,并设置为正确的ID,在onCreateView
设置codesnippets:
@覆盖
公共无效onViewCreated(查看视图,捆绑savedInstanceState){
super.onViewCreated(查看,savedInstanceState);
如果(getArguments()。getBoolean(ARG_BOOL)){
滚动视图=(滚动型)getView()findViewById(scrollID)。
的RelativeLayout =(RelativeLayout的)getView()findViewById(relativeID)。 ((滚动型)getView()。findViewById(scrollID))。smoothScrollTo(
0,(getView()findViewById(relativeID)。)getLeft())。 Toast.makeText(getApplicationContext(),滚动,Toast.LENGTH_SHORT)。
显示();
}
}
的问题是,它不执行smoothScrollTo方法,而烤面包被执行
下面我所说的片段(布尔滚动来控制smoothScrollTo法):
私人无效选择信息(INT标识,布尔滚动){
片段片段=新ContentFragment();
捆绑ARGS =新包();
args.putBoolean(ContentFragment.ARG_BOOL,滚动);
args.putInt(ContentFragment.ARG_ITEM_ID,ID);
fragment.setArguments(参数); //将替换现有的片段插入片段
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame,片段)
。承诺();
//高亮显示所选项目,更新称号,并关上抽屉
TextView中的TextView =(的TextView)findViewById(ID);
。getActionBar()的setTitle(textView.getText());
mDrawerLayout.closeDrawer(mDrawerList);
}
您的帮助感谢; - )
编辑:
的解决方法:的
如果(getArguments()。getBoolean(ARG_BOOL)){
getView()。findViewById(scrollID)。员额(新的Runnable(){
@覆盖
公共无效的run(){
((滚动型)getView()。findViewById(scrollID))。
smoothScrollTo(0,(getView()findViewById(relativeID))共达());
}
});
}
尝试调用<一个href=\"http://developer.android.com/reference/android/widget/ScrollView.html#smoothScrollTo(int,%20int)\"><$c$c>smoothScrollTo$c$c>法呼吁后
视图:
滚动型滚动视图=(滚动型)getView()findViewById(scrollID)。
scrollView.post(新的Runnable(){ @覆盖
公共无效的run(){
scrollView.smoothScrollTo(0,(getView()findViewById(relativeID))共达());
}
});
I have following situation:
I'm using a Navigation Drawer to make the user easily navigate between different topics.
You can find a picture here:
https://drive.google.com/file/d/0B2gMUEFwlGRfSHRzVlptYmFQTXc/edit?usp=sharing
When clicking on a heading, like General the only the main content view is replaced, by using a fragment and a layout file. But when the user clicks on a subheading, like Gameplay, the layout changes, AND it should scroll down to a specifc view in the layout.
So in my fragment class I'm using the "onViewCreated" method and the smoothScrollTo method, provided by a ScrollView. The ScrollView and the RelativeLayout are both not null, and set to the right id, set in "onCreateView"
Codesnippets:
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (getArguments().getBoolean(ARG_BOOL)) {
scrollView = (ScrollView)getView().findViewById(scrollID);
relativeLayout = (RelativeLayout)getView().findViewById(relativeID);
((ScrollView)getView().findViewById(scrollID)).smoothScrollTo(
0, (getView().findViewById(relativeID)).getLeft());
Toast.makeText(getApplicationContext(), "SCROLL",Toast.LENGTH_SHORT).
show();
}
}
The problem is that it is not executing the "smoothScrollTo" method, while the toast gets executed.
Here I call the fragment (boolean scroll is used to control the smoothScrollTo method):
private void selectItem(int Id, boolean scroll) {
Fragment fragment = new ContentFragment();
Bundle args = new Bundle();
args.putBoolean(ContentFragment.ARG_BOOL, scroll);
args.putInt(ContentFragment.ARG_ITEM_ID, Id);
fragment.setArguments(args);
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment)
.commit();
// Highlight the selected item, update the title, and close the drawer
TextView textView = (TextView) findViewById(Id);
getActionBar().setTitle(textView.getText());
mDrawerLayout.closeDrawer(mDrawerList);
}
Thanks for your help ;-)
EDIT: SOLUTION:
if (getArguments().getBoolean(ARG_BOOL)) {
getView().findViewById(scrollID).post(new Runnable() {
@Override
public void run() {
((ScrollView) getView().findViewById(scrollID)).
smoothScrollTo(0, (getView().findViewById(relativeID)).getTop());
}
});
}
Try calling smoothScrollTo
method in calling post
of the view:
ScrollView scrollView = (ScrollView)getView().findViewById(scrollID);
scrollView.post(new Runnable() {
@Override
public void run() {
scrollView.smoothScrollTo(0,(getView().findViewById(relativeID)).getTop());
}
});
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