问题
I wrote this small test application to demonstrate the problem, that is the searchable activity is not started when the user presses the search button on the keyboard.
I have been following the developer guides, but from my web search, it turns out that the official developer guide misses some points. From my SO search (which did not help):
Reference 1: Solved by Adding tag in the element in the manifest. I also looked into the manifest of the sample "User Dictionary" (I don't know where can I find the samples online, or I would link to it). This tag is there in the application element.
Reference 2: The "android:label" and "android:hint" in res/xml/searchable.xml must be references to string resources and not hard coded strings. Mine are.
Reference 3: Add a tag with "android:name="android.app.default_searchable" " (and " android:value="<. searchable-activity-name>" ") in the manifest in the Activity from where the search is going to be initiated. Tried this, did not seem to work.
Reference 4: "Your Searchable activity has to do something - and actually display results." Mine does, it receives the intent with the ACTION_SEARCH action, and passes the search query string retrieved from the intent to a method named "performSearch(string)" which displays the string in a textview.
So what am I doing wrong, and what can I do to solve this?
Code: MainActivity.java - Has a single SearchView - the user enters the query and presses the Search button on the keyboard.
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 - The Searchable Configuration
<?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>
Manifest File
<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>
Layouts:
activity_main.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="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>
EDIT 1: it's crazy that I wrote a similar app with the search dilogue instead of the search widget, that works perfectly.
I tried to debug it in Eclipse but debugging stops because the TestTwoActivity (the searchable activity) simply won't start.
回答1:
I'm not sure if you've forgotten to add it but your MainActivity misses setting the searchable info on the 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()));
}
As a side note:
I've had problems with the default_searchable meta-tag, when using flavors. It seemed to only work when using the full path (skipping the flavor) to the search activity e.g.:
<meta-data
android:name="android.app.default_searchable"
android:value="com.example.SearchActivity"/>
来源：https://stackoverflow.com/questions/27567796/android-assisted-search-the-search-button-does-not-invoke-the-searchable-activi