ShareActionProvider，actionbar

ShareActionProvider，actionbar

menu/share_action.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto">
   <item android:id="@+id/menu_item_share"
         android:title="Share"
         app:showAsAction="ifRoom"
         app:actionProviderClass="android.support.v7.widget.ShareActionProvider"/>
</menu>

MainActivity

package com.panjn.sharedemo;

import android.content.Intent;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.ShareActionProvider;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private Intent shareIntent;
    private ShareActionProvider mShareActionProvider;

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

        shareIntent = new Intent();
        shareIntent.setAction(Intent.ACTION_SEND);
        shareIntent.putExtra(Intent.EXTRA_TEXT,"panjn.jpeg");
        shareIntent.setType("text/plain*");
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.share_action,menu);
        MenuItem item = menu.findItem(R.id.menu_item_share);
        mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(item);
        setShareIntent(shareIntent);
        return true;
    }

    private void setShareIntent(Intent intent) {
        if(mShareActionProvider != null && intent != null) {
            mShareActionProvider.setShareIntent(intent);
        }
    }
}