出现问题的代码：

public class MySearchableActivity extends Activity implements SearchView.OnQueryTextListener, SearchView.OnCloseListener {

private SearchView mSearchView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my_searchable);

    mSearchView = (SearchView) findViewById(R.id.search_view);
    mSearchView.setIconifiedByDefault(false);
    mSearchView.setOnQueryTextListener(this);
    mSearchView.setOnCloseListener(this);

    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}

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

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

@Override
public boolean onClose() {
    Intent intent = new Intent();
    intent.setClass(MySearchableActivity.this, MainActivity.class);
    startActivity(intent);
    return false;
}

}

问题出在onClose方法中启动Activity的操作失败了，解决方法是使用OnCancelListener接口来启动Activity。代码如下：

public class MySearchableActivity extends Activity implements SearchView.OnQueryTextListener, SearchView.OnCloseListener, SearchView.OnSuggestionListener, SearchManager.OnCancelListener {

private SearchView mSearchView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my_searchable);

    mSearchView = (SearchView) findViewById(R.id.search_view);
    mSearchView.setIconifiedByDefault(false);
    mSearchView.setOnQueryTextListener(this);
    mSearchView.setOnCloseListener(this);
    mSearchView.setOnSuggestionListener(this);

    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    searchManager.setOnCancelListener(this);
    mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}

@Override
public boolean onQueryTextSubmit(String query) {
    // TODO Auto-generated method stub