Android5.0旋转菜单实例详解

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public class MainActivity extends AppCompatActivity {
  private Toolbar toobar;
  private ActionBarDrawerToggle actionBarDrawerToggle;
  private DrawerLayout drawerLayout;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    toobar = (Toolbar) findViewById(R.id.toolbar);
    //设置toobar为标题栏
    setSupportActionBar(toobar);
    //设置显示旋转菜单
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    //抽屉布局
    drawerLayout = ((DrawerLayout) findViewById(R.id.activity_main));
    //activitybar开关
    actiOnBarDrawerToggle= new ActionBarDrawerToggle(this, drawerLayout, R.string.app_name, R.string.app_name);
    //同步开关 如果不写的话, 滑动开关 按钮一直就一个状态 不会变化
    actionBarDrawerToggle.syncState();
    //添加监听
    drawerLayout.addDrawerListener(actionBarDrawerToggle);
  }
  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    //这里是让用户点击按钮的时候可以打开抽屉
    return actionBarDrawerToggle.onOptionsItemSelected(item)
        || super.onOptionsItemSelected(item);
  }
}