安卓源码里有谷歌给的关于 Tile 的说明。
frameworks/base/packages/SystemUI/docs/qs-tiles.md

SystemUI QuickSettings 简称QS，指的是 下拉菜单里的区域。区域里的一个选项就是一个 Tile 。

下图是 frameworks/base/packages/SystemUI/docs/ 里的附图示例，

SystemUI 会加载自己的Tile ，也会加载第三方应用的 Tile 。

SystemUI 里有配置，会默认加载一些Tile到QS面板 ，如 wifi 、蓝牙的Tile 。未配置的Tile不会显示的QS面板里，但备选区域里有，用户点击 编辑 按钮，可以通过拖拽的方式添加、删除Tile。

SystemUI QuickSettings 的加载流程先按住不表。

先试试作为第三方应用，如何实现添加Tile到SystemUI。

1.创建Service继承TileService

package com.test.luodemo.tileservice;

import android.content.Intent;
import android.service.quicksettings.TileService;
import android.util.Log;

public class ClickTileService extends TileService {

    public static final String TAG = ClickTileService.class.getSimpleName();

    public ClickTileService() {
    }

    @Override
    public void onTileAdded() {
        super.onTileAdded();
        Log.d(TAG,"onTileAdded");
    }

    @Override
    public void onTileRemoved() {
        super.onTileRemoved();
        Log.d(TAG,"onTileRemoved");
    }

    @Override
    public void onStartListening() {
        super.onStartListening();
        Log.d(TAG,"onStartListening");
    }

    @Override
    public void onStopListening() {
        super.onStopListening();
        Log.d(TAG,"onStopListening");
    }

    @Override
    public void onClick() {
        super.onClick();
        Log.d(TAG,"onClick");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d(TAG,"onDestroy");
    }
}

示例创建了 ClickTileService ，继承 android.service.quicksettings.TileService ，重写 TileService 的方法。

• onTileAdded: Tile 被添加到 QS 面板时的回调。
• onTileRemoved: Tile 从 QS 面板移除时的回调。
• onStartListening: called when QS is opened and the tile is showing. This marks the start of the window when calling getQSTile is safe and will provide the correct object.
• onStopListening: called when QS is closed or the tile is no longer visible by the user. This marks the end of the window described in onStartListening.
• onClick: 点击事件。

观察原生的选项，点击事件主要有两种：

• 做切换功能，作用是打开、关闭某个功能，如打开关闭wifi。
• 做跳转功能，如点击打开应用的某个页面。

点击做切换功能

    @Override
    public void onClick() {
        super.onClick();
        Log.d(TAG,"onClick");
        Tile tile = getQsTile();
        int curState = tile.getState();
        if (curState == Tile.STATE_ACTIVE) {
            tile.setState(Tile.STATE_INACTIVE);
            tile.setStateDescription("StateDescriptionOff");
            tile.setSubtitle("SubtitleOff");
            tile.updateTile();
        } else if (curState == Tile.STATE_INACTIVE) {
            tile.setState(Tile.STATE_ACTIVE);
            tile.setStateDescription("StateDescriptionOn");
            tile.setSubtitle("SubtitleOn");
            tile.updateTile();
        }

    }

通过 getQsTile() 可以获取到 Tile 对象，就可以更新状态、描述。

本例 on/off 对比，

点击做跳转功能

    @Override
    public void onClick() {
        super.onClick();
        Log.d(TAG,"onClick");
        Intent intent = new Intent(ClickTileService.this, TileActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        //startActivity(intent);//会打开页面，下拉菜单不会收起
        startActivityAndCollapse(intent);//会打开页面，下拉菜单收起
    }

跳转功能 ，一看便知。

• startActivity ：会打开页面，但是下拉菜单不会自动收起。手动收起下拉菜单后才能看到 TileActivity 。不友好，不推荐。
• startActivityAndCollapse ：TileService 里的方法，会打开页面，下拉菜单会自动收起，然后显示 TileActivity 。操作方式友好，推荐。

2.Service注册到AndroidManifest

前面写了 Service ，四大组件之一 ，注册到 AndroidManifest ，无需解释了。

TileService 的源码注释有说明。

A TileService provides the user a tile that can be added to Quick Settings. Quick Settings is a space provided that allows the user to change settings and take quick actions without leaving the context of their current app.
The lifecycle of a TileService is different from some other services in that it may be unbound during parts of its lifecycle. Any of the following lifecycle events can happen independently in a separate binding/ creation of the service.
When a tile is added by the user its TileService will be bound to and onTileAdded() will be called.
When a tile should be up to date and listing will be indicated by onStartListening() and onStopListening().
When the user removes a tile from Quick Settings onTileRemoved() will be called.
onTileAdded() and onTileRemoved() may be called outside of the onCreate() - onDestroy() window
TileService will be detected by tiles that match the "android. service. quicksettings. action. QS_TILE" and require the permission "android. permission. BIND_QUICK_SETTINGS_TILE". The label and icon for the service will be used as the default label and icon for the tile. Here is an example TileService declaration.
  <service
     android:name=".MyQSTileService"
     android:label="@string/ my_default_tile_label"
     android:icon="@drawable/ my_default_icon_label"
     android:permission="android. permission. BIND_QUICK_SETTINGS_TILE">
     <intent-filter>
         <action android:name="android. service. quicksettings. action. QS_TILE" />
     </ intent-filter>
 </ service>

照葫芦画瓢，

• icon ：自定义图标。
• label ：描述。可以通过 tile.setLabel() 修改。
• android:permission=“android.permission.BIND_QUICK_SETTINGS_TILE” ：固定写法。
• < action android:name=“android.service.quicksettings.action.QS_TILE” /> ：固定写法。

两个固定写法，frameworks/base/packages/SystemUI/docs/qs-tiles.md 里也有说明。

This is an abstract Service that needs to be implemented by the developer. The Service manifest must have the permission android.permission.BIND_QUICK_SETTINGS_TILE and must respond to the action android.service.quicksettings.action.QS_TILE. This will allow SystemUI to find the available tiles and display them to the user.

示例代码，

	<service
            android:name=".tileservice.SwitchTileService"
            android:enabled="true"
            android:exported="true"
            android:icon="@drawable/icon_info"
            android:label="MySwitchLabel"
            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
            <intent-filter>
                <action android:name="android.service.quicksettings.action.QS_TILE" />
            </intent-filter>
        </service>
        <service
            android:name=".tileservice.ClickTileService"
            android:enabled="true"
            android:exported="true"
            android:icon="@drawable/icon_vector_red_star"
            android:label="MyClickLabel"
            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
            <intent-filter>
                <action android:name="android.service.quicksettings.action.QS_TILE" />
            </intent-filter>
        </service>

run ，添加到 QS ，两个 Tile 的效果，