刷新片段内的图 [英] Refreshing a view inside a fragment
问题描述
我有搜索，看起来像这样的许多问题，但还没有找到我的答案的任何人。
我有一个有3个标签通过操作栏访问活动。我加入3片段膨胀的自定义视图我做了扩展视图类来实现这一点。
目前，该数据库的变化，我试图通过调用无效（）/ postinvalidate（）刷新我的选项卡中的观点，但是这并不能正常工作。用于呼叫片段onCreateView正如许多其他的选择予考虑的也是如此。
当我去到另一个选项卡，然后回去，但是，这种变化已经取得了和我的看法是更新的，它应该是。
我如何可以模拟，改变到另一个选项卡时，会发生同样的事情？是什么发生。我想看一看片段生命周期（试着拨打onCreateView（））的数字出来，但它只是不希望刷新/重绘，因为它应该。
该数据是否正确，因为当我改变到另一个选项卡中的数据被更改。
我删除了一些code，因为它不再是相关的。我实现了，而不是我自己的Observer模式Cursorloaders通知的变化。这是我的主要活动现在。
现在的问题是我该怎么办，现在如果我要重新绘制这些片段内的视图。如果我申请fragmentObject.getView（）。无效（），这是行不通的。我有同样的问题和以前一样，但现在我的观察，通知在数据库中的变化正确地与装载机实现。
公共类ArchitectureActivity扩展活动实现LoaderManager.LoaderCallbacks＆LT;光标＆GT; {
@覆盖
公共无效的onCreate（包savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;
动作条动作条= getActionBar（）;
actionbar.setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）;
ActionBar.Tab EditTab = actionbar.newTab（）的setText（编辑）。
ActionBar.Tab VisualizeTab = actionbar.newTab（）的setText（可视化）。
ActionBar.Tab AnalyseTab = actionbar.newTab（）的setText（分析）。
片段editFragment =新EditFragment（）;
片段visualizeFragment =新VisualizeFragment（）;
片段analyseFragment =新AnalyseFragment（）;
EditTab.setTabListener（新MyTabsListener（editFragment））;
VisualizeTab.setTabListener（新MyTabsListener（visualizeFragment））;
AnalyseTab.setTabListener（新MyTabsListener（analyseFragment））;
actionbar.addTab（EditTab）;
actionbar.addTab（VisualizeTab）;
actionbar.addTab（AnalyseTab）;
ArchitectureApplication architectureApplication =（ArchitectureApplication）getApplicationContext（）;
architectureApplication.initialize（）;
getLoaderManager（）initLoader（0，空，这一点）。
getLoaderManager（）initLoader（1，null，则此）。
}
公共装载机＆LT;光标＆GT; onCreateLoader（INT ID，捆绑参数）{
如果（ID == 0）{
返回新CursorLoader（这一点，GraphProvider.NODE_URI，NULL，NULL，NULL，NULL）;
}否则如果（ID == 1）{
返回新CursorLoader（这一点，GraphProvider.ARC_URI，NULL，NULL，NULL，NULL）;
}
返回null;
}
公共无效onLoadFinished（装载机＆LT;光标＆GT;装载机，光标光标）{
//重新加载数据，实际情况是因为切换到另一个选项卡时，新的数据显示，高达精
Log.e（数据，装）;
}
公共无效onLoaderReset（装载机＆LT;光标＆GT;装载机）{
}
}
我已经找到了解决办法，刷新我的片段里面的观点。我重新创建（新CustomView）认为每一个数据库已经被更新的时间。我调用的setContentView（CustomView视图）后。它看起来更像是一个黑客，但它的作品，没有别的，我试图做。
虽然我的问题并没有真正解决，我给了奖励亚历克斯·洛克伍德。他对装载机的建议使我的应用程序更好，它使我不停地寻找，我终于找到了解决办法。
I have searched the numerous questions that look like this one, but haven't found my answer in any of them.
I have an activity that has 3 tabs accessible through the action bar. I achieved this by adding 3 fragments that inflate a custom view I made extending the view class.
At the moment the database changes, I try to refresh the view in my tab by calling invalidate()/postinvalidate(), but this does not work. The same is true for calling onCreateView of the fragment just as many other options I considered.
When I go to another tab and go back, however, the change has been made and my view is updated as it should be.
How can I simulate the same thing that happens when changing to another tab? What does happen. I tried to look at the Fragment lifecycle (tried to call onCreateView()) to figure it out but it just doesn't want to refresh/redraw as it should.
The data is loaded properly, as the data is changed when I change to another tab.
I deleted some of the code as it is no longer relevant. I implemented Cursorloaders instead of my own Observer pattern to notify a change. This is my main activity right now.
The question is what should I do now if I want to redraw the view inside these fragments. If I apply fragmentObject.getView().invalidate() it does not work. I'm having the same problem as before, but now my Observer to notify a change in the database is properly implemented with loaders.
public class ArchitectureActivity extends Activity implements LoaderManager.LoaderCallbacks<Cursor> {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActionBar actionbar = getActionBar();
actionbar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab EditTab = actionbar.newTab().setText("Edit");
ActionBar.Tab VisualizeTab = actionbar.newTab().setText("Visualize");
ActionBar.Tab AnalyseTab = actionbar.newTab().setText("Analyse");
Fragment editFragment = new EditFragment();
Fragment visualizeFragment = new VisualizeFragment();
Fragment analyseFragment = new AnalyseFragment();
EditTab.setTabListener(new MyTabsListener(editFragment));
VisualizeTab.setTabListener(new MyTabsListener(visualizeFragment));
AnalyseTab.setTabListener(new MyTabsListener(analyseFragment));
actionbar.addTab(EditTab);
actionbar.addTab(VisualizeTab);
actionbar.addTab(AnalyseTab);
ArchitectureApplication architectureApplication = (ArchitectureApplication)getApplicationContext();
architectureApplication.initialize();
getLoaderManager().initLoader(0, null, this);
getLoaderManager().initLoader(1, null, this);
}
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
if (id == 0){
return new CursorLoader(this, GraphProvider.NODE_URI , null, null, null, null);
} else if (id == 1){
return new CursorLoader(this, GraphProvider.ARC_URI , null, null, null, null);
}
return null;
}
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
// Reloading of data, actually happens because when switching to another tab the new data shows up fine
Log.e("Data", "loaded");
}
public void onLoaderReset(Loader<Cursor> loader) {
}
}
I've found a workaround to refresh the view inside my fragment. I recreated (new CustomView) the view every time the database has been updated. After that I call setContentView(CustomView view). It looks more like a hack, but it works and nothing else that I tried does.
Although my problem was not actually solved, I gave the reward to Alex Lockwood. His advice on Loaders made my application better and it caused me to keep looking for a solution that I eventually found.
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