[英]Restore state of android's search view widget
我在我的操作栏中有一个搜索视图,我希望在方向更改后恢复查询。 我怎样才能做到这一点? 使用SearchView.setQuery(query, false);
从bundle中设置查询SearchView.setQuery(query, false);
不起作用,因为searchview一扩展就将其查询设置为""
。
下面是onActivityCreated
的相关代码:
if(savedInstanceState != null && savedInstanceState.containsKey(BUNDLE_KEY_SEARCH))
mCurFilter = savedInstanceState.getString(BUNDLE_KEY_SEARCH);
在这里我的onSaveInstanceState
:
savedInstanceState.putString(BUNDLE_KEY_SEARCH, mCurFilter);
super.onSaveInstanceState(savedInstanceState);
那么我怎么能恢复它的状态,因为我无法使用setQuery
做到这setQuery
? 谢谢大家
作为解决方法,请替换您的
mSearchView.setQuery(mSearchText, false);
有:
final String s = mSearchText;
mSearchView.post(new Runnable() {
@Override
public void run() {
mSearchView.setQuery(s, false);
}
});
它将在系统设置空字符串后设置保存的字符串。
是的,可以恢复搜索视图小部件的状态:
使用以下代码保存搜索查询文本:
private String mSearchQuery;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getMenuInflater();
menuInflater.inflate(R.menu.search_menu, menu);
// Associate searchable configuration with the SearchView
SearchManager searchManager =
(SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView =
(SearchView) menu.findItem(R.id.search).getActionView();
searchView.setSearchableInfo(
searchManager.getSearchableInfo(getComponentName()));
if(mSearchQuery != null){
searchView.setIconified(true);
searchView.onActionViewExpanded();
searchView.setQuery(mSearchQuery, false);
searchView.setFocusable(true);
}
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener(){
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mSearchQuery = newText;
return false;
}
});
return true;
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putString("searchQuery", mSearchQuery);
super.onSaveInstanceState(outState);
}
然后在OnCreate()方法的活动中,添加以下行:
if(savedInstanceState != null){
mSearchQuery = savedInstanceState.getString("searchQuery");
}
有更好的(在我看来)方式(没有发布Runnable )以避免在扩展你的SearchView时将查询设置为“” 。
1)您将需要一个String变量来存储查询。
//String that you fill in onQueryTextChange
String searchText;
//String, that is filled after you restore previous
String queryToSave;
2)从Bundle获取您的查询后,将其存储在另一个变量中。
if(this.searchText!=null)
{
this.queryToSave=this.searchText;
}
3)在onQueryTextChange(查询字符串)您填写SEARCHTEXT可变文本或为空,如果是空的
4)在onMenuItemActionExpand(菜单项的项目),你需要保存你的恢复字符串(SEARCHTEXT)到另一个变量(queryToSave),因为它(SEARCHTEXT)将设置为null后会有调用空文本onQueryTextChange
if(searchText!=null)
{
queryToSave=new StringBuffer(searchText).toString();
}
5)所以现在如果你打电话
mSearchView.setQuery(queryToSave, false);
在扩展SearchView之后, queryToSave将不会为空,您将看到扩展的SearchView与您的已恢复文本!
你应该这样做:
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends AppCompatActivity {
private SearchView mSearchView;
private String mSearchString;
private static final String SEARCH_KEY = "search";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// if you saved something on outState you can recover them here
if (savedInstanceState != null) {
mSearchString = savedInstanceState.getString(SEARCH_KEY);
}
}
// This is called before the activity is destroyed
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mSearchString = mSearchView.getQuery().toString();
outState.putString(SEARCH_KEY, mSearchString);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
MenuItem searchMenuItem = menu.findItem(R.id.menu_main_action_search);
mSearchView = (SearchView) MenuItemCompat.getActionView(searchMenuItem);
//focus the SearchView
if (mSearchString != null && !mSearchString.isEmpty()) {
searchMenuItem.expandActionView();
mSearchView.setQuery(mSearchString, true);
mSearchView.clearFocus();
}
return super.onCreateOptionsMenu(menu);
}
}
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