我试图制作"分享" Android应用程序的操作栏中的按钮。 这是我的代码:
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ShareActionProvider;
import android.widget.TextView;
和片段部分:
{
private String mForecastText;
public PlaceholderFragment() {
setHasOptionsMenu(true);
}
private Intent sharedIntentMaker(){
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
shareIntent.setType("text/plain");
shareIntent.putExtra(Intent.EXTRA_TEXT, mForecastText + "#SunshineApp");
return shareIntent;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_detail, menu);
MenuItem menuItem = menu.findItem(R.id.menu_action_share);
ShareActionProvider mShareActionProvider = (ShareActionProvider) menuItem.getActionProvider();
mShareActionProvider.setShareIntent(sharedIntentMaker());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
TextView textIntent = (TextView) rootView.findViewById(R.id.textIntent);
Intent intent = getActivity().getIntent();
mForecastText = intent.getStringExtra("INT_PS");
textIntent.setText(mForecastText);
return rootView;
}
当我在模拟器甚至真实设备上运行我的应用程序时,我得到例外:
AndroidRuntime﹕ FATAL EXCEPTION: main java.lang.UnsupportedOperationException: This is not supported, use MenuItemCompat.getActionProvider()
并链接到onCreateOptionsMenu()的字符串:
ShareActionProvider mShareActionProvider = (ShareActionProvider) menuItem.getActionProvider();
mShareActionProvider.setShareIntent(sharedIntentMaker());
我做错了什么?
P.S。:来自logcat的错误的堆栈跟踪:
01-11 13:03:17.490 2331-2331 / com。*****。*****。***** E / AndroidRuntime:FATAL EXCEPTION:main 处理:com。*****。*****。*****,PID:2331
java.lang.UnsupportedOperationException: This is not supported, use MenuItemCompat.getActionProvider()
at android.support.v7.internal.view.menu.MenuItemImpl.getActionProvider(MenuItemImpl.java:645)
at com.project.malina.sunsine.DetailActivity$PlaceholderFragment.onCreateOptionsMenu(DetailActivity.java:70)
at android.support.v4.app.Fragment.performCreateOptionsMenu(Fragment.java:1868)
at android.support.v4.app.FragmentManagerImpl.dispatchCreateOptionsMenu(FragmentManager.java:1989)
at android.support.v4.app.FragmentActivity.onCreatePanelMenu(FragmentActivity.java:276)
at android.support.v7.app.ActionBarActivity.superOnCreatePanelMenu(ActionBarActivity.java:276)
at android.support.v7.app.ActionBarActivityDelegate$1.onCreatePanelMenu(ActionBarActivityDelegate.java:79)
at android.support.v7.app.ActionBarActivityDelegateBase.preparePanel(ActionBarActivityDelegateBase.java:979)
at android.support.v7.app.ActionBarActivityDelegateBase.doInvalidatePanelMenu(ActionBarActivityDelegateBase.java:1182)
at android.support.v7.app.ActionBarActivityDelegateBase.access$100(ActionBarActivityDelegateBase.java:79)
at android.support.v7.app.ActionBarActivityDelegateBase$1.run(ActionBarActivityDelegateBase.java:115)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
答案 0 :(得分:66)
首先,您无法将android.widget.ShareActionProvider
用于appcompat-v7
操作栏后端(例如ActionBarActivity
)。使用appcompat-v7
版ShareActionProvider
,或将所有内容移至原生操作栏。
其次,如果您坚持使用appcompat-v7
,则无法安全地使用getActionProvider()
,因为API级别10及更低版本上不存在该方法。将menuItem.getActionProvider()
替换为MenuItemCompat.getActionProvider(menuItem)
。
FWIW,here is a sample project实施appcompat-v7
版ShareActionProvider
。
答案 1 :(得分:11)
您可以按照以下链接中的Google代码示例中的模式进行操作。 https://github.com/googlesamples/android-ActionBarCompat-ShareActionProvider
最简单的方法是转到Android Studio =>文件,导入示例。然后输入“Share Action Provider”。
以下是使用带有ActionBarCompat的ShareActionProvider创建共享操作菜单项所涉及的代码,向后兼容API v7。
MainActivity.java
// BEGIN_INCLUDE(get_sap)
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu resource
getMenuInflater().inflate(R.menu.main_menu, menu);
// Retrieve the share menu item
MenuItem shareItem = menu.findItem(R.id.menu_share);
// Now get the ShareActionProvider from the item
mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(shareItem);
// Get the ViewPager's current item position and set its ShareIntent.
int currentViewPagerItem = ((ViewPager) findViewById(R.id.viewpager)).getCurrentItem();
setShareIntent(currentViewPagerItem);
return super.onCreateOptionsMenu(menu);
}
// END_INCLUDE(get_sap
private void setShareIntent(int position) {
// BEGIN_INCLUDE(update_sap)
if (mShareActionProvider != null) {
// Get the currently selected item, and retrieve it's share intent
ContentItem item = mItems.get(position);
Intent shareIntent = item.getShareIntent(MainActivity.this);
// Now update the ShareActionProvider with the new share intent
mShareActionProvider.setShareIntent(shareIntent);
}
// END_INCLUDE(update_sap)
}
main_menu.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:support="http://schemas.android.com/apk/res-auto">
<!--
To use ShareActionProvider provided by ActionBarCompat, we reference the class by set the
support:actionProviderClass attribute with the full class name of ShareActionProvider.
-->
<item
android:id="@+id/menu_share"
android:title="@string/menu_share"
support:actionProviderClass="android.support.v7.widget.ShareActionProvider"
support:showAsAction="always" />
答案 2 :(得分:1)
请遵循以下步骤:
步骤1)。要向您的活动添加“共享”操作,请在应用栏的菜单资源中放置一个ShareActionProvider
。像这样
<item android:id="@+id/action_share"
android:title="@string/share"
app:showAsAction="ifRoom"
app:actionProviderClass="android.support.v7.widget.ShareActionProvider"/>
请注意actionProviderClass
步骤2)现在,请确保在Activity Java类中导入相同的ShareActionProvider
import android.support.v7.widget.ShareActionProvider;
第3步)
onCreate
方法的以下部分
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_activity_bar, menu);
ShareActionProvider shareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(menu.findItem(R.id.actionbar_share));
shareActionProvider.setShareIntent(shareIt());
意图方法
private Intent shareIt() {
Intent intent= new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
String shareMsgBody = "Hello, Share this with world !!";
intent.putExtra(Intent.EXTRA_TEXT, shareAndPromotionBody);
startActivity(Intent.createChooser(intent, "Spread the message!!"));
return intent;
}