设置ActionBar后，Android 2.x中出现错误

Question

Hi guys I set this code in my MainActivity.java to add a share button on my app. I´m aware that action bar doesnt work well on previous android versions. One of the customers that has android 2.3 told me that when he hits the phone menu button the apps crash and its forced to close. From version 3.0 to above everythings goes fine, you see the share button. Is there some line of code I could add prior to this function to override o prevent using the share button action if the android version is below 3.0??

This is what I have in my code:

@Override

    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main_menu, menu);
        MenuItem shareItem = (MenuItem) menu.findItem(R.id.action_share);
        ShareActionProvider mShare = (ShareActionProvider)shareItem.getActionProvider();

        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.setAction(Intent.ACTION_SEND);
        shareIntent.setType("text/plain");
        shareIntent.putExtra(Intent.EXTRA_TEXT, "Download here https://www.apps.com");

        mShare.setShareIntent(shareIntent);
        return true;
    }

My menu.xml file has the following (shows the icon, works ok):

<item android:id="@+id/action_share" android:title="@string/menu_share"
      android:icon="@drawable/menu_share" android:showAsAction="ifRoom"
      android:actionProviderClass="android.widget.ShareActionProvider"></item>

Answer 1

ActionBar is not available out of the box in Android 2.x. The crash is happening because the MenuItem does not understand getActionProvider() , which was introduced in API 14 (Android 4.0 Ice Cream Sandwich).

You have two options:

1. use the v7 appcompat library in order to use the ActionBar in older versions of Android;
2. or, you could implement the good-old 2.x menus.

This is what you could do to avoid the crash on 2.x devices. Guard the use of the newer APIs by checking that the device is running Ice Cream Sandwich or later:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main_menu, menu);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
        MenuItem shareItem = (MenuItem) menu.findItem(R.id.action_share);
        ShareActionProvider mShare = (ShareActionProvider)shareItem.getActionProvider();

        Intent shareIntent = new Intent(Intent.ACTION_SEND);
        shareIntent.setAction(Intent.ACTION_SEND);
        shareIntent.setType("text/plain");
        shareIntent.putExtra(Intent.EXTRA_TEXT, "Download here https://www.apps.com");

        mShare.setShareIntent(shareIntent);
    }
    return true;
}