SearchView 为空 android
SearchView is null android
您好,我正在尝试像在 Gmail 中一样实现 SearchView。
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
getMenuInflater().inflate(R.menu.main, menu);
searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
searchView 对象为空
清单:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dgp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@drawable/logo"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="android.app.default_searchable"
android:value=".GameSearchActivity" />
<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=".GameInfoActivity"
android:label="@string/title_activity_game_info" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity
android:name=".SettingsActivity"
android:label="@string/title_activity_settings" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity
android:name=".GameSearchActivity"
android:label="@string/title_activity_game_search" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:value="@xml/searchable" />
</activity>
</application>
</manifest>
Searchable.xml
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="@string/search_hint" />
菜单布局:
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.dgp.MainActivity" >
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
android:actionViewClass="android.support.v7.widget.SearchView"/>
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never"/></menu>
任何人都可以帮助理解为什么这个对象会变空吗?
谢谢!!!!
尝试
MenuItem searchItem = menu.findItem(R.id.action_search);
searchView = MenuItemCompat.getActionView(searchItem);
在菜单布局中:
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
android:actionViewClass="android.support.v7.widget.SearchView"/>
使用这个:
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
app:actionViewClass="android.support.v7.widget.SearchView"/>
因此您需要在菜单项标签中使用 app
而不是 android
:
app:actionViewClass="android.support.v7.widget.SearchView"
要支持搜索视图,您需要使用
app:actionViewClass="android.support.v7.widget.SearchView"----在菜单xml文件
并且必须导入
android.support.v7.widget.SearchView 在 java 文件中
请仔细看输入class必须是android.support.v7.widget.SearchView。当这两个部分不相同时,可能会发生空指针异常。
您好,我正在尝试像在 Gmail 中一样实现 SearchView。
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
getMenuInflater().inflate(R.menu.main, menu);
searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
searchView 对象为空
清单:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.dgp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="21" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="@drawable/logo"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<meta-data
android:name="android.app.default_searchable"
android:value=".GameSearchActivity" />
<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=".GameInfoActivity"
android:label="@string/title_activity_game_info" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity
android:name=".SettingsActivity"
android:label="@string/title_activity_settings" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
<activity
android:name=".GameSearchActivity"
android:label="@string/title_activity_game_search" >
<intent-filter>
<action android:name="android.intent.action.SEARCH" />
</intent-filter>
<meta-data
android:name="android.app.searchable"
android:value="@xml/searchable" />
</activity>
</application>
</manifest>
Searchable.xml
<searchable xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="@string/search_hint" />
菜单布局:
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.example.dgp.MainActivity" >
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
android:actionViewClass="android.support.v7.widget.SearchView"/>
<item
android:id="@+id/action_settings"
android:orderInCategory="100"
android:title="@string/action_settings"
app:showAsAction="never"/></menu>
任何人都可以帮助理解为什么这个对象会变空吗? 谢谢!!!!
尝试
MenuItem searchItem = menu.findItem(R.id.action_search);
searchView = MenuItemCompat.getActionView(searchItem);
在菜单布局中:
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
android:actionViewClass="android.support.v7.widget.SearchView"/>
使用这个:
<item
android:id="@+id/action_search"
android:icon="@drawable/ic_action_search"
app:showAsAction="collapseActionView|always"
android:title="@string/action_search"
app:actionViewClass="android.support.v7.widget.SearchView"/>
因此您需要在菜单项标签中使用 app
而不是 android
:
app:actionViewClass="android.support.v7.widget.SearchView"
要支持搜索视图,您需要使用
app:actionViewClass="android.support.v7.widget.SearchView"----在菜单xml文件
并且必须导入
android.support.v7.widget.SearchView 在 java 文件中
请仔细看输入class必须是android.support.v7.widget.SearchView。当这两个部分不相同时,可能会发生空指针异常。