QQ抽屉的使用

布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    android:id="@+id/dl"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.bwei.www.monimouth01.MainActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <!--主页面底部布局-->
        <LinearLayout
            android:id="@+id/ll_bottom"
            android:orientation="horizontal"
            android:layout_alignParentBottom="true"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">


        <TextView
            android:id="@+id/txt_concer"
            android:text="关注"
            android:textSize="21sp"
            android:gravity="center"
            android:layout_weight="1"
            android:padding="5dp"
            android:layout_width="0dp"
            android:layout_height="wrap_content" />
            <TextView
                android:id="@+id/txt_message"
                android:text="消息"
                android:textSize="21sp"
                android:gravity="center"
                android:layout_weight="1"
                android:padding="5dp"
                android:layout_width="0dp"
                android:layout_height="wrap_content" />
            <TextView
                android:id="@+id/txt_my"
                android:text="我的"
                android:textSize="21sp"
                android:gravity="center"
                android:layout_weight="1"
                android:padding="5dp"
                android:layout_width="0dp"
                android:layout_height="wrap_content" />
        </LinearLayout>
        <FrameLayout
            android:layout_width="match_parent"
            android:id="@+id/fl_content"
            android:layout_above="@id/ll_bottom"
            android:layout_height="match_parent"
            >

        </FrameLayout>

    </RelativeLayout>
    <!--抽屉的背景-->
<LinearLayout
    android:orientation="vertical"
    android:layout_gravity="start"
    android:background="#FFFFFF"
    android:layout_width="320dp"
    android:layout_height="match_parent">
    <ListView
        android:id="@+id/lv_drawer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

    </ListView>

</LinearLayout>


</android.support.v4.widget.DrawerLayout>

Activity要写的

import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private List<String> listLeft;
    private LeftDrawAdapter adapter;
    private ConcernFragment cf;
    private TextView txtConrent;
    private TextView txtMessage;
    private TextView txtMy;
    //关注
    private FragmentManager manager;
    //消息
    private MessageFragment msgf;
    //我的
    private MyFragment mf;

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

        //找控件
        DrawerLayout dl = findViewById(R.id.dl);
        ListView lvDraewr = findViewById(R.id.lv_drawer);
        txtConrent = findViewById(R.id.txt_concer);
        txtMessage = findViewById(R.id.txt_message);
        txtMy = findViewById(R.id.txt_my);
        //点击事件
        txtConrent.setOnClickListener(this);
        txtMessage.setOnClickListener(this);
        txtMy.setOnClickListener(this);

        //创建一个抽屉里list集合
        listLeft = new ArrayList<>();
        //抽屉里显示的数据
        listLeft.add("所有收件箱");
        listLeft.add("所有未读");
        listLeft.add("所有红旗");

        //抽屉的适配器
        adapter = new LeftDrawAdapter(this,listLeft);
        lvDraewr.setAdapter(adapter);

        //抽屉下的Fragment的页面
        cf = new ConcernFragment();
        msgf = new MessageFragment();
        mf = new MyFragment();
        manager = getSupportFragmentManager();

            //当前页面进行设置
        manager.beginTransaction().
                add(R.id.fl_content,cf)
                .add(R.id.fl_content,msgf)
                .add(R.id.fl_content,mf)
                .hide(msgf)
                .hide(mf)
                .commit();
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.txt_concer:
                manager.beginTransaction()
                        .show(cf)
                        .hide(msgf)
                        .hide(mf)
                        .commit();
                break;
            case R.id.txt_message:
                manager.beginTransaction()
                        .hide(cf)
                        .show(msgf)
                        .hide(mf)
                        .commit();
                break;
            case R.id.txt_my:
                manager.beginTransaction()
                        .hide(cf)
                        .hide(msgf)
                        .show(mf)
                        .commit();
                break;
        }
    }
}