我正在尝试在 Actionbar 上添加搜索栏,但在 getActionVeiw() 上发现了 Nullpointer 异常。请帮助我解决这个问题,我已经提供了所需的详细信息。
我的 MainActivity 扩展了 AppCompatActivity 并在这行代码上返回错误
SearchView searchView = (SearchView)menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
对于上面的搜索 View ,我正在导入
import android.support.v7.widget.SearchView;
菜单main.xml文件
<item
android:id="@+id/action_search"
android:orderInCategory="100"
android:title="@string/action_search"
app:showAsAction="always"
app:actionViewClass="android.support.v7.widget.SearchView" />
Gradle 文件-
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
compile 'com.android.support:support-v4:+'
compile 'com.android.support:appcompat-v7:+'
compile 'com.google.android.gms:play-services-appindexing:8.1.0'
}
最佳答案
请上传完整代码。
你必须初始化
getMenuInflater().inflate(R.menu.menu_main, menu);
或者你必须删除
MenuInflater inflater = getMenuInflater();
inflater.inflate()
然后在 onCreateOptionsMenu() 中使用这段代码
SearchView searchView = (SearchView)menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
例如-:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
// Associate searchable configuration with the SearchView
getMenuInflater().inflate(R.menu.menu_main, menu);
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
this.menu = menu; // this will copy menu values to upper defined menu so that we can change icon later akash
return true;
}
试试这个。
关于android - NullPointerException- : Attempt to invoke interface method "android.view.View android.view.MenuItem.getActionView()' on a null object reference,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34369469/