侧拉 l

##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);
    }
}

作者：weixin_44022413
来源：CSDN
原文：https://blog.csdn.net/weixin_44022413/article/details/84895333
版权声明：本文为博主原创文章，转载请附上博文链接！

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