以下是我的活动的代码 import android.app.Activity; import android.os.Bundle; import android.support.v7.widget.ShareActionProvider; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends Activity { private ShareActionProvider shareAction; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main, menu); MenuItem item = […]