侧拉框

最新推荐文章于 2021-06-01 11:21:59 发布

weixin_44022413

最新推荐文章于 2021-06-01 11:21:59 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44022413/article/details/84895333

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本文详细介绍了在Android应用中集成侧滑菜单的过程，包括使用ActionBarDrawerToggle进行DrawerLayout和ActionBar之间的协调，自定义侧滑菜单的适配器，以及实现菜单项点击事件的响应。通过示例代码展示了如何切换页面和关闭侧滑菜单。

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##核心代码
//显示标题栏左边icon
//actionBar是4.0 getActionBar()
//不要使用getActionBar
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

getSupportFragmentManager()
.beginTransaction()
.replace(R.id.left_drawer, new LeftDrawerFragment())
.commit();

drawer = findViewById(R.id.drawer);
//DrawerLayout 和 ActionBar(Toolbar)中间人
toggle = new ActionBarDrawerToggle(this, drawer,
R.string.drawer_open, R.string.drawer_close);
//同步状态
toggle.syncState();
//Drawer监听
drawer.addDrawerListener(toggle);

@Override
public boolean onOptionsItemSelected(MenuItem item) {
//先交给toggle处理
if (toggle.onOptionsItemSelected(item)) {
return true;
}
return super.onOptionsItemSelected(item);
}

//关闭侧拉菜单
public void closeDrawer() {
drawer.closeDrawer(Gravity.START);
}

public void switchPage(int position){
    viewPager.setCurrentItem(position-1);
    drawerclose();
}

menus.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(position == 0) {
((MainActivity)getActivity()).closeDrawer();
return;
}
((MainActivity)getActivity()).switchPage(position - 1);
}
});

##适配器

public class Leftadapter extends BaseAdapter {
    private Context context;
    private String[] s;

    public Leftadapter(Context context) {
        this.context = context;
        s = new String[]{"","首页","联系人","我的"};
    }

    @Override
    public int getCount() {
        return s.length;
    }

    @Override
    public String getItem(int position) {
        return s[position];
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getViewTypeCount() {
        return 2;
    }

    @Override
    public int getItemViewType(int position) {
        if (position==0){
            return 0;
        }
        return 1;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       if (getItemViewType(position)==0){
           TopViewHolder topViewHolder = null;
           if (convertView==null){
               convertView = LayoutInflater.from(context).inflate(R.layout.lefttop_item,parent,false);
                topViewHolder = new TopViewHolder(convertView);
           }  else {
               topViewHolder = (TopViewHolder) convertView.getTag();
           }

       }else {
           ViewHolder viewHolder = null;
           if (convertView==null){
               convertView = LayoutInflater.from(context).inflate(R.layout.lefttop_item,parent,false);
               viewHolder = new ViewHolder(convertView);
           }  else {
               viewHolder = (ViewHolder) convertView.getTag();
           }
           viewHolder.name.setText(getItem(position));
       }
        return convertView;
    }
    class TopViewHolder{
        ImageView img;
        TextView name;

        public TopViewHolder(View convertView) {
           img = convertView.findViewById(R.id.img);
           name = convertView.findViewById(R.id.name);
           convertView.setTag(this);
        }


    }
    class ViewHolder{
        TextView name;

        public ViewHolder(View convertView) {
            name = convertView.findViewById(R.id.name);
            convertView.setTag(this);
        }
    }
}