利用searchview搜索应用程序

package com.example.excerciseforsearchview;  import java.util.List;  import android.os.Bundle; import android.app.Activity; import android.app.SearchManager; import android.app.SearchableInfo; import android.content.Context; import android.view.Menu; import android.view.MenuItem; import android.widget.SearchView; import android.widget.TextView; import android.widget.Toast;  public class MainActivity extends Activity implements SearchView.OnQueryTextListener{     TextView textView;     private SearchView searchView;     private SearchableInfo searchableInfo;     private SearchableInfo shInfo;     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         textView=(TextView) findViewById(R.id.text);     }                @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 menuItem=menu.findItem(R.id.action_settings);         //下面一行代码的作用是Returns the currently set action view for this menu item.         //要使用menuItem的getActionView方法需在设置menu的xml文件item里添加          //android:actionViewClass="android.widget.SearchView"         searchView=(SearchView) menuItem.getActionView();         searchView.setOnQueryTextListener(this);         searchAppInfo();         return true;     }      private void searchAppInfo() {         // TODO Auto-generated method stub         SearchManager searchManager=(SearchManager) getSystemService(Context.SEARCH_SERVICE);         if (searchManager!=null) {             //Returns a list of the searchable activities that can be included in global search.             //把所有可以被搜索到的Searchable activities列出             List<SearchableInfo> searchableInfos=searchManager.getSearchablesInGlobalSearch();             //Gets information about a searchable activity             //根据ComponentName得到具体搜到的searchableInfo             searchableInfo=searchManager.getSearchableInfo(getComponentName());             for (SearchableInfo sInfo:searchableInfos) {                 if (sInfo.getSuggestAuthority()!=null&&sInfo.getSuggestAuthority().startsWith("application")) {                     searchableInfo=sInfo;                 }             }                      }         //Sets the SearchableInfo for this SearchView.         //Properties in the SearchableInfo are used to display         //labels, hints, suggestions, create intents         //for launching search results screens and controlling other affordances such as a voice button.         searchView.setSearchableInfo(searchableInfo);                       }      @Override     public boolean onQueryTextChange(String newText) {         // TODO Auto-generated method stub         return false;     }      @Override     public boolean onQueryTextSubmit(String query) {         // TODO Auto-generated method stub         textView.append(query);         return false;     }  }