我是用了搜索查看在动作条的的ListView 。在放大镜可触及的搜索查看显示了它的编辑框，用户可以输入文本过滤列表的内容。它几乎工作。但是，当用户presses中的向上的按钮时，搜索查看折叠回图标，窗口小部件内的文本被清除，过滤复位。效果（对我来说）是列表可以过滤只有当搜索查看未图标化。被通缉的行为是搜索查看崩解后保持过滤文本也。

I am using the the SearchView in the ActionBar of the ListView. The magnifying glass can be touched, the SearchView shows its edit box, and the user can enter the text for filtering the content of the list. It almost works. However, when the user presses the Up button, the SearchView collapses back to the icon, the text inside the widget is cleared, and the filtering is reset. The effect (in my case) is that the list can be filtered only when the SearchView is not iconified. The wanted behaviour is to keep the filter text also after the SearchView was collapsed.

注意：可能是Android的4.3改变的行为。随着4.2.2它的工作通缉。请参阅下面的意见。

Attention: The behaviour probably changed in Android 4.3. With 4.2.2 it worked as wanted. See the observations below.

详细信息：具体而言，该菜单包含以下项目：

Details: To be more specific, the menu contains the following item:

<item android:id="@+id/menu_search_customers"
      android:title="@string/menu_search_text"
      android:icon="@android:drawable/ic_menu_search"
      android:showAsAction="ifRoom|collapseActionView"
      android:actionViewClass="android.widget.SearchView" />

注意图标和安卓showAsAction 。我相信了的向上的按钮显示在默认情况下，当搜索查看（通过的向上的我的意思是＆LT; 加上图标 - 看到合适的图像蓝皮书从官方的导航与返回和向上）。看来，默认的处理程序实现只是折叠扩展搜索查看（返回到图标状态）。

Notice the icon and the android:showAsAction. I belive the Up button appears by default when the SearchView is expanded (by Up I mean the < plus the icon -- see the right image with the blue book from the official Navigation with Back and Up). It seems that the default handler implementation just collapses the expanded SearchView (returns back to the icon state).

在调试时，我发现了 onQueryTextChange（）被激发与空文本时的向上的使用。 （我相信这是不是与Android 4.2.2的情况下，因为它的工作作为操作系统更新之前想要的。）这就是为什么列表项的过滤也是复位的原因 - 看到我的 onQueryTextChange （）下面。我想搜索查看倒塌，过滤器文本显示为字幕的行动吧。

When debugging, I have found that the onQueryTextChange() is fired with the empty text when the Up is used. (I believe this was not the case with Android 4.2.2, because it worked as wanted before the OS update.) This is the reason why the filtering of the list items is also reset -- see my onQueryTextChange() below. I want the SearchView collapsed, and the filter text displayed as subtitle in the action bar.

到目前为止，我的code相关的搜索查看是这样的：

So far, my code related to the SearchView looks like this:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // MenuInflater adds the magnifying glass icon for the SearchView 
    // to the ActionBar as the always visible menu item.
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.customers_menu, menu);

    // Get the related SearchView widget.
    SearchView sv = (SearchView) menu.findItem(R.id.menu_search_customers)
                                     .getActionView();

    // Get the changes immediately.
    sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

        // I am not sure whether the onQueryTextSubmit() is important
        // for the purpose.
        @Override
        public boolean onQueryTextSubmit(String query) {
            getActionBar().setSubtitle(mCurFilter);
            return true;
        }


        @Override
        public boolean onQueryTextChange(String newText) {
            // The newText is stored into a member variable that
            // is used when the new CursorLoader is created.
            mCurFilter = newText;
            getActionBar().setSubtitle(mCurFilter);
            getLoaderManager().restartLoader(0, null,
                                             CustomersOverviewActivity.this);
            return true;
        }
    });

    return true;
}

在重新启动加载器调用 onCreateLoader 。注意 mCurFilter 用于构建SQL查询：

The restarted loader calls the onCreateLoader. Notice the mCurFilter is used for building the SQL query:

@Override
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    String[] projection = { CustomerTable._ID,
                            CustomerTable.CODE,
                            CustomerTable.NAME,
                            CustomerTable.STREET,
                            CustomerTable.TOWN };

    String selection = null;        // init
    String[] selectionArgs = null;  // init

    if ( ! mCurFilter.isEmpty()) {
        selection = CustomerTable.NAME + " like ?";
        selectionArgs = new String[]{ "%" + mCurFilter +"%" };
    }
    CursorLoader cursorLoader = new CursorLoader(this,
            DemoContentProvider.CUSTOMERS_CONTENT_URI, projection,
            selection, selectionArgs,
            orderInfo);
    return cursorLoader;
}

我想检测时的向上的是pressed 之前的 onQueryTextChange（）情况被调用。这样（说）我可以设置一个标志，并阻止 mCurFilter 的空搜索查看的内容分配。此外，当搜索图标再次扩大，我想初始化文字的扩大搜索查看从 mCurFilter 之前它显示（即展开的观点是preSET与过滤文本）。如何可以做？

I would like to detect the situation when the Up is pressed before the onQueryTextChange() is called. This way (say) I could set a flag and block the mCurFilter assignment by the emptied SearchView content. Also, when the search icon is expanded again, I would like to initialize the text in the expanded SearchView from the mCurFilter before it is shown (i.e. the expanded view is preset with the filter text). How that can be done?

更新：越早实施搜索查看过...

@Override
public void onActionViewCollapsed() {
    clearFocus();
    updateViewsVisibility(true);
    mQueryTextView.setImeOptions(mCollapsedImeOptions);
    mExpandedInActionView = false;
}

现在，它包含了...

Now, it contains...

@Override
public void onActionViewCollapsed() {
    setQuery("", false);
    clearFocus();
    updateViewsVisibility(true);
    mQueryTextView.setImeOptions(mCollapsedImeOptions);
    mExpandedInActionView = false;
}

你知道什么可以为查询设置为空字符串的原因是什么？我应该重写新的实现由老code？还是有更好的办法吗？

Do you know what could be the reason for setting the query to the empty string? Should I override the new implementation by the old code? Or is there a better way?

推荐答案

我已经写了 StatefulSearchView 保留了文本：

I have written a StatefulSearchView which retains the text:

import android.content.Context;
import android.os.Parcel;
import android.os.Parcelable;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.widget.EditText;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
import android.widget.TextView;

public class StatefulSearchView extends SearchView implements android.view.View.OnLayoutChangeListener, OnQueryTextListener,android.widget.SearchView.OnCloseListener{

    private boolean mSaveText=true;
    private OnQueryTextListener mQueryListener;
    private String mQuery;
    private OnCloseListener mCloseListener;
    private boolean fromIconify = true;

    public StatefulSearchView(Context context, AttributeSet attrs) {
        super(context, attrs);
        addOnLayoutChangeListener(this);
        super.setOnCloseListener(this);
    }

    public StatefulSearchView(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        addOnLayoutChangeListener(this);
        super.setOnCloseListener(this);
    }

    public void setSaveSearchTextState(boolean save){
        this.mSaveText = save;
        this.setSaveEnabled(mSaveText);

    }


    public void setOnStatefulQueryTextListener(OnQueryTextListener listener) {
        mQueryListener = listener; 
        super.setOnQueryTextListener(this);
    }

    @Override
    public void onLayoutChange(View v, int left, int top, int right,
            int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
        if(super.isIconfiedByDefault() || !super.isIconified() && !TextUtils.isEmpty(mQuery) && mSaveText){      
              setSavedText(mQuery);              
        }
         Log.i("onLayoutChanged()",""+mQuery);

    }


    @Override
    public void setIconified(boolean iconify) {
        mQuery = getQuery().toString();
        Log.i("setIconified()",""+mQuery);
        super.setOnCloseListener(null);
        super.setIconified(iconify);
        super.setIconified(iconify);
        super.setOnCloseListener(this);
        fromIconify = true;
    }


    @Override
    public void setOnCloseListener(OnCloseListener listener) {
        mCloseListener = listener;
        super.setOnCloseListener(this);
    }

    @Override
    protected Parcelable onSaveInstanceState() {
        Parcelable state =  super.onSaveInstanceState();
        return new SearchQueryState(state, mQuery, mSaveText);
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        SearchQueryState sqs = (SearchQueryState)state;
        super.onRestoreInstanceState(sqs.getSuperState());
        mQuery = sqs.getSavedQuery();
        mSaveText = sqs.getSaveText();
    }

    @Override
    public boolean onQueryTextChange(String arg0) {
        mQuery = arg0;
        return mQueryListener.onQueryTextChange(mQuery);
    }

    @Override
    public boolean onQueryTextSubmit(String arg0) {
        // TODO Auto-generated method stub
        return mQueryListener.onQueryTextSubmit(arg0);
    }

    private TextView getTextView(){
        int searchTextViewId = getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
        return (TextView) this.findViewById(searchTextViewId);
    }

    private void setSavedText(String s){
       super.setOnQueryTextListener(null);
       Log.i("setSavedText()",""+s);
       TextView t = getTextView();
       t.setText(s);
       if(!TextUtils.isEmpty(s))
           ((EditText)t).setSelection(s.length());
       super.setOnQueryTextListener(mQueryListener);
    }
    private class SearchQueryState extends BaseSavedState{

        private boolean mSaveText;
        private String mQueryText;
        public SearchQueryState(Parcel arg0) {
            super(arg0);
            this.mQueryText = arg0.readString();
            this.mSaveText = arg0.readInt() == 1;
        }

        public SearchQueryState(Parcelable superState, String queryText, boolean saveText) {
            super(superState);
            this.mQueryText = queryText;
            this.mSaveText = saveText;
        }

        public boolean getSaveText(){
            return this.mSaveText;
        }


        public String getSavedQuery(){
            return mQueryText;
        }
        @Override
        public void writeToParcel(Parcel dest, int flags) {
            // TODO Auto-generated method stub
            super.writeToParcel(dest, flags);
            dest.writeString(mQueryText);
            dest.writeInt(mSaveText? 1: 0);
        }


    }

    @Override
    public boolean onClose() {
        Log.i("onClose()", "Is from setIconified(): "+fromIconify);
        if(!fromIconify){
            mQuery = null;
            fromIconify = false;
        }
        return mCloseListener == null ? false : mCloseListener.onClose();
    }


}

在示范活动：

public class MainActivity extends Activity{

    private StatefulSearchView mSearchView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getActionBar().setHomeButtonEnabled(true);
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
      if(item.getItemId()==android.R.id.home) {
          mSearchView.setIconified(true);
          return true;
      }
        return super.onMenuItemSelected(featureId, item);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);

            MenuItem item = menu.findItem(R.id.action_search);

         mSearchView =(StatefulSearchView)item.getActionView();
         mSearchView.setSaveSearchTextState(true);
         mSearchView.setOnStatefulQueryTextListener(new OnQueryTextListener(){

            @Override
            public boolean onQueryTextChange(String newText) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public boolean onQueryTextSubmit(String query) {
                // TODO Auto-generated method stub
                return false;
            }});
        return true;
    }

在菜单中的xml：

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_search"
        android:orderInCategory="100"
        android:showAsAction="always"
        android:actionViewClass="com.nikola.despotoski.saveablesearchview.StatefulSearchView"
        android:title="@string/action_settings"/>

</menu>

在的 搜索查看 ，它清楚地说，他们的文字更改为，：

@Override
    public void onActionViewCollapsed() {
        setQuery("", false);
        clearFocus();
        updateViewsVisibility(true);
        mQueryTextView.setImeOptions(mCollapsedImeOptions);
        mExpandedInActionView = false;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onActionViewExpanded() {
        if (mExpandedInActionView) return;

        mExpandedInActionView = true;
        mCollapsedImeOptions = mQueryTextView.getImeOptions();
        mQueryTextView.setImeOptions(mCollapsedImeOptions | EditorInfo.IME_FLAG_NO_FULLSCREEN);
        mQueryTextView.setText("");
        setIconified(false);
    }

让我知道，如果你有问题。

Let me know if you have issues.