Android辅助搜索:搜索按钮不会调用可搜索的活动(其他解决方案没有帮助)

Question

我编写了这个小测试应用程序来演示问题,即当用户按下键盘上的搜索按钮时,不会启动可搜索的活动.

我一直在关注开发者指南,但是从我的网络搜索来看,事实证明官方开发者指南错过了一些观点. 从我的SO搜索(没有帮助):

• 参考1:通过在清单中的元素中添加标记来解决.我还查看了"用户词典"样本的清单(我不知道在哪里可以找到在线样本,或者我会链接到它).该标记位于application元素中.

• 参考2: res/xml/searchable.xml中的"android:label"和"android:hint"必须是对字符串资源的引用,而不是硬编码字符串.我的是.

• 参考3:在活动的清单中添加一个带有"android:name ="android.app.default_searchable""(以及"android:value ="<.searchable-activity-name>"")的标签.将要发起.试过这个,似乎没有用.

• 参考文献4: "您的可搜索活动必须做某事 - 并实际显示结果." 我的确如此,它通过ACTION_SEARCH操作接收意图,并将从intent中检索到的搜索查询字符串传递给名为"performSearch(string)"的方法,该方法在textview中显示字符串.

那么我做错了什么,我该怎么做才能解决这个问题呢？

代码: MainActivity.java - 只有一个SearchView - 用户输入查询并按下键盘上的"搜索"按钮.

public class MainActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

TestTwoActivity.java

    public class TestTwoActivity extends Activity {
        TextView tv;
        private static final String TAG = TestTwoActivity.class.getSimpleName();

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

            /**
             * The following code enables assisted search on the SearchView by calling setSearchableInfo() and passing it our SearchableInfo object.
             */
            SearchView searchView = (SearchView) findViewById(R.id.searchActivity_searchView);
            // SearchManager => provides access to the system search services.

            // Context.getSystemService() => Return the handle to a system-level
            // service by name. The class of the returned object varies by the
            // requested name.

            // Context.SEARCH_SERVICE => Returns a SearchManager for handling search

            // Context = Interface to global information about an application environment. This is an abstract class whose implementation is provided by the Android
            // system. It allows access to application-specific resources and classes, as well as up-calls for application-level operations such as launching
            // activities, broadcasting and receiving intents, etc.

            // Activity.getComponentName = Returns a complete component name for this Activity 

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

            /**
             * If the search is executed from another activity, the query is sent to this (searchable) activity in an Intent with ACTION_SEARCH action.
             */
            // getIntent() Returns the intent that started this Activity
            Intent intent = getIntent();
            if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
                Log.i(TAG, "Search Query Delivered");//check
                String searchQuery = intent.getStringExtra(SearchManager.QUERY);
                performSearch(searchQuery);
            }

        }

        private void performSearch(String searchQuery) {
            //Just for testing purposes, I am simply printing the search query delivered to this searchable activity in a textview.
            tv = (TextView) findViewById(R.id.testTwoActivity_textView);
            tv.setText(searchQuery);
        }
}

res/xml/searchable.xml - 可搜索配置

<?xml version="1.0" encoding="utf-8"?>

<searchable xmlns:android="http://schemas.android.com/apk/res/android"
    android:label="@string/app_name"
    android:hint="@string/searchViewHint" >
</searchable>

清单文件

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.tests"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".TestTwoActivity"
            android:label="@string/title_activity_test_two" >
            <intent-filter>
                <action android:name="android.intent.action.SEARCH"/> <!-- Declares the activity to accept ACTION_SEARCH intent -->
            </intent-filter> 
                <meta-data 
                    android:name="android.app.searchable"
                    android:resource="@xml/searchable" /> <!-- Specifies the searchable configuration to use --> 
        </activity>

        <!-- Points to searchable activity so the whole app can invoke search. -->
        <meta-data android:name="android.app.default_searchable"
                   android:value=".TestTwoActivity" />

    </application>

</manifest>

布局:

activity_main.xml中

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"

    android:orientation="vertical"

    android:layout_width="match_parent"
    android:layout_height="match_parent"

    tools:context="com.tests.MainActivity" >

    <android.support.v7.widget.SearchView
        android:id="@+id/searchActivity_searchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
         /> 

</LinearLayout>

activity_test_two.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"

    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    tools:context="${relativePackage}.${activityClass}" >

    <android.support.v7.widget.SearchView
        android:id="@+id/searchActivity_searchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
         /> 

    <TextView
        android:id="@+id/testTwoActivity_textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</LinearLayout>

---

编辑1:我用搜索dilogue而不是搜索小部件编写了一个类似的应用程序,这很有效.

我试图在Eclipse中调试它,但调试停止,因为TestTwoActivity(可搜索的活动)根本无法启动.

Answer 1

我不确定你是否忘记添加它但是你的MainActivity未命中设置了可搜索的信息SearchView:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    SearchView searchView = (SearchView) findViewById(R.id.searchActivity_searchView);
    SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
}

作为旁注:

default_searchable使用香精时,我对元标记有问题.它似乎仅在使用完整路径(跳过风味)到搜索活动时才起作用,例如:

<meta-data 
    android:name="android.app.default_searchable"
    android:value="com.example.SearchActivity"/>