Question

我知道这已被问过很多次了。关于上述问题，我已经完成了大部分问题。但他们并没有真正帮助。我在代码中找不到问题。所以这是我的代码

package com.example.actionbaractivity;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

public class MainActivity extends ActionBarActivity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu items for use in the action bar
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main_activity_actions, menu);
        return super.onCreateOptionsMenu(menu);
    }
}

now manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.actionbaractivity"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="18"
        android:targetSdkVersion="18" />

    <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" 
            android:theme="@style/Theme.AppCompat.Light" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

现在菜单xml：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

 <item android:id="@+id/action_search"
          android:icon="@drawable/ic_action_search"
          android:title="@string/action_search"
          android:showAsAction="always|withText"/>

</menu>

最后是字符串xml：

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

    <string name="app_name">ActionbarActivity</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_search"></string>

</resources>

Answer 1

这样做：

 <?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

 <item android:id="@+id/action_search"
          android:icon="@drawable/ic_action_search"
          android:title="@string/action_search"
          android:showAsAction="collapseActionView|always"
          android:actionViewClass="android.widget.SearchView" />

</menu>

然后在你的Activity类中：

@Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.main, menu);

        MenuItem searchItem = menu.findItem(R.id.action_search);

        SearchView searchView = (SearchView) searchItem.getActionView();

        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);

       if(null!=searchManager ) 
       {   
         searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
       }

       searchView.setIconifiedByDefault(false);

        return true;
    }

详细了解to add Search functionality to android App

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