搜索栏 SearchDialog 的使用 不显示的问题

在配置文件，代码里反复查看的情况下，还是未能找到SearchDialog不显示的原因！

在度娘找了很久，终于在某人的评论中找到答案，试了下了果然起效，修改内容如下：

<?xml version="1.0" encoding="utf-8"?>
<searchable
xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/searchHint"   <!--需要用@string 方法，且必须要有label属性-->
android:hint="@string/searchHint"
android:searchMode="showSearchLabelAsBadge" >
</searchable>

不错，正是android：label属性的赋值问题，需要用@String方式注入赋值，而不能直接赋值！

对于SearchDialog的使用，会比较繁琐些，但是它是一种浮动的方式出现，可以覆盖当前Activity界面，

相对于直接使用SearchView效果要好一些。

当然SearchView 如果跟Fragment结合，也是不错的选择！

下面介绍下SearchDialog的使用方法：

第一步：配置文件（xml）配置：

1：添加searchable显示的xml文件；

2：AndroidManifest.xml中添加配置参数；

第二步：编写代码，调用SearchDialog。

1：编写SearchRecentSuggestionsProvider 实体类，用于保存搜索记录。

2：在需要使用搜索的当前活动（Activity），覆盖onSearchRequested方法，调用startSearch方法显示SearchDialog。

3：在显示搜索结果的活动（Activity），重写onNewIntent方法，处理查询。

注意：

第一步,示例代码。

//定义intent-filter接收SEACH Action事件。

<intent-filter>
               <action android:name="android.intent.action.SEARCH" />
               <category android:name="android.intent.category.DEFAULT" />
    </intent-filter>
<meta-data android:resource="@xml/searchable" android:name="android.app.searchable"></meta-data>

<?xml version="1.0" encoding="utf-8"?>
<searchable
xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/searchHint"   //需要用@string 方法，且必须要有label属性
android:hint="@string/searchHint"
android:searchMode="showSearchLabelAsBadge" >
</searchable>

指出了当执行搜索的字符串提交时，将调用哪一个activity去进行处理。
<meta-data
android:name="android.app.default_searchable"
android:value=".YourSearchActivity" /> 

第二步，示例代码。

//调用SearchDialog
    public boolean onSearchRequested() {
        // If your application absolutely must disable search, do it here.
// Next, set up a bundle to send context-specific search data (if any)
        // The bundle can contain any number of elements, using any number of keys;
        // For this Api Demo we copy a string from the user input field, and store
        // it in the bundle as a string with the key "demo_key".
        // For most applications, you can simply pass null to startSearch().
        Bundle appDataBundle = null;

        appDataBundle = new Bundle();

        // Now call the Activity member function that invokes the Search Manager UI.
        startSearch("111", false, appDataBundle, false);

        // Returning true indicates that we did launch the search, instead of blocking it.
        return true;
    }

当按下搜索按钮，调用onSearchRequested方法，系统就会自动发送Intent，action是Intent.ACTION_SEARCH.

//处理查询内容：
    /**
     * Called when new intent is delivered.
     *
     * This is where we check the incoming intent for a query string.
     *
     * @param newIntent The intent used to restart this activity
     */
    @Override
    public void onNewIntent(final Intent newIntent) {
        super.onNewIntent(newIntent);

        // get and process search query here
        final Intent queryIntent = getIntent();
        final String queryAction = queryIntent.getAction();
        if (Intent.ACTION_SEARCH.equals(queryAction)) {
            doSearchQuery(queryIntent, "onNewIntent()");
        }
        else {
            Toast.makeText(this, "onNewIntent(), but no ACTION_SEARCH intent", Toast.LENGTH_SHORT).show();
        }
    }

 /**
     * Generic search handler.
     *
     * In a "real" application, you would use the query string to select results from
     * your data source, and present a list of those results to the user.
     */
    private void doSearchQuery(final Intent queryIntent, final String entryPoint) {
      // The search query is provided as an "extra" string in the query intent
        final String queryString = queryIntent.getStringExtra(SearchManager.QUERY);

        Toast.makeText(this,queryString, Toast.LENGTH_SHORT).show();

        //保存搜索记录
        SearchRecentSuggestions suggestions=new SearchRecentSuggestions(this,
                SearchSuggestionSampleProvider.AUTHORITY, SearchSuggestionSampleProvider.MODE);
        suggestions.saveRecentQuery(queryString, null);

    }

 1 public class SearchSuggestionSampleProvider extends
 2         SearchRecentSuggestionsProvider {
 3      /**
 4      * This is the provider authority identifier.  The same string must appear in your
 5      * Manifest file, and any time you instantiate a
 6      * {@link android.provider.SearchRecentSuggestions} helper class.
 7      */
 8     final static String AUTHORITY = "com.example.testhttp.SuggestionProvider";
 9     /**
10      * These flags determine the operating mode of the suggestions provider.  This value should
11      * not change from run to run, because when it does change, your suggestions database may
12      * be wiped.
13      */
14     final static int MODE = DATABASE_MODE_QUERIES;
15
16     /**
17      * The main job of the constructor is to call {@link #setupSuggestions(String, int)} with the
18      * appropriate configuration values.
19      */
20     public SearchSuggestionSampleProvider() {
21         super();
22         setupSuggestions(AUTHORITY, MODE);
23     }
24 }

看了代码是不是有些熟悉，没错，来源Android SDK 的App Demo，所以写Android应用还是先浏览Android开发人员写的Demo，还是很有参考价值的！