• 在配置檔案frameworks/base/packages/SystemUI/res/values/config.xml下新增screenshot

1. <stringname="quick_setting_tiles_default"translatable="false">
2.     wifi,bt,inversion,dnd,cell,airplane,rotation,flashlight,location,cast,hotspot,screenshot
3. </string>

• 在frameworks/base/packages/SystemUI/src/com/android.systemui/statusbar/phone/QSTileHost.java中得到config.xml中的資料，並進行判斷，在方法createTile()中新增

1. elseif(tileSpec.equals(“screenshot”)) returnnew ScreenShotTile(this); 

• 在QSTileHost.java中還需要往構造方法中傳入一個ScreenShotController物件，需要新增如下內容：

  import com.mediatek.systemui.statusbar.policy.ScreenShotController;
  
  private final ScreenShotController mScreenShotController;
  
  public QSTileHost(…………ScreenShotController screenshot){
  ………….
  mScreenShotController=screenshot;
  ………….
  }
  
  public ScreenShotController getScreenShotController(){
  	return mScreenShotController;
  }
   
  

• 這裡涉及到了ScreenShotController，於是我們要去定義它，ScreenShotController是一個介面，內容如下：

  package com.mediatek.systemui.statusbar.policy;
  
  public interface ScreenShotController{
  		boolean isSupportScreenShot();
  }
  

• 完成ScreenShotTile類，在這個方法中需要完成狀態列圖示顯示和截圖操作，可以參考其他生成Tile的方法來完成顯示圖示的方法。該類繼承了QSTile類，所以要清楚QSTile這個類的內容。QSTile類中需要新增的內容如下：

  import com.mediatek.systemui.statusbar.policy.ScreenShotController;
  public interface Host{
  ……
  ScreenShotController getScreenShotController();
  …….
  }

• ScreenShotTile類的實現如下所示：

1. publicclass ScreenShotTile extends QSTile<QSTile.BooleanState> {  
2.     privatestaticfinal String TAG = "ScreenShotTile";  
3.     privatestaticfinalint SCREEN_SHOT_MESSAGE = 10000;  
4.     privatestatic GlobalScreenshot mScreenshot;  
5.     Handler mHandler = new Handler() {  
6.         publicvoid handleMessage(Message msg) {  
7.             switch (msg.what) {  
8.             case TAKE_SCREEN_SHOT_MESSAGE:  
9.                 final Messenger callback = msg.replyTo;  
10.                 if (mScreenshot == null) {  
11.                     mScreenshot = new GlobalScreenshot(mContext);  
12.                 }  
13.                 mScreenshot.takeScreenshot(new Runnable() {  
14.                     @Overridepublicvoid run() {  
15.                         Message reply = Message.obtain(null, 1);  
16.                         try {  
17.                             if(callback != null){  
18.                                 callback.send(reply);  
19.                             }  
20.                         }catch(RemoteException e){  
21.                         }  
22.                     }  
23.                 }, msg.arg1 > 0, msg.arg2 > 0);  
24.                 break;                      
25.             default:  
26.                 break;  
27.             }  
28.         }  
29.     };  
30.     public TakeScreenShotTile(Host host) {  
31.         super(host);  
32.     }  
33.     @Override
34.     protected BooleanState newTileState() {  
35.         returnnew BooleanState();  
36.     }  
37.     @Override
38.     publicvoid setListening(boolean listening) {  
39.     }  
40.     @Override
41.     protectedvoid handleClick() {  
42.         mHost.startSettingsActivity(new Intent());  
43.         Message msg = mHandler.obtainMessage(SCREEN_SHOT_MESSAGE);  
44.         mHandler.sendMessageDelayed(msg,1000);  
45.     }  
46.     @Override
47.     protectedvoid handleLongClick() {  
48.         mHost.startSettingsActivity(new Intent());  
49.         Message msg = mHandler.obtainMessage(SCREEN_SHOT_MESSAGE);  
50.         mHandler.sendMessageDelayed(msg,1000);  
51.     }  
52.     @Override
53.     protectedvoid handleUpdateState(BooleanState state, Object arg) {  
54.         state.value=false;  
55.         state.autoMirrorDrawable=false;  
56.         state.label = mContext.getString(R.string.screenshot);//載入字串資源
57.         state.icon = ResourceIcon.get(R.drawable.ic_qs_screenshot);//載入圖片資源} 
58. @Override
59.  public int getMetricsCategory(){ 
60. return MetricsLogger.QS_SCREEN_SHOT; 
61. } 
62. }

• 在frameworks/base/packages/SystemUI/res/中新增對應的字串和相應解析度下的圖片資源。

1.      在frameworks/base/packages/SystemUI/res/values/strings.xml新增

1. <stringname=screenshot>ScreenShot</string>

2.      在frameworks/base/packages/SystemUI/res/drawable目錄下新建檔案ic_qs_screenshot.xml，檔案內容如下：

1. <vectorxmlns:android="http://schemas.android.com/apk/res/android"
2.           android:width="64dp"
3.           android:height="64dp"
4.           android:viewportWidth="48.0"
5.           android:viewportHeight="48.0"
6.     <path
7.         android:fillColor="#FFFFFFFF"
8.         android:pathData="M 48.00,0.00  
9.            C 48.00,0.00 48.00,48.00 48.00,48.00  
10.              48.00,48.00 0.00,48.00 0.00,48.00  
11.              0.00,48.00 0.00,0.00 0.00,0.00  
12.              0.00,0.00 48.00,0.00 48.00,0.00 Z  
13.            M 12.74,5.34  
14.            C 10.77,4.60 8.82,7.07 7.61,8.31  
15.              4.18,11.82 4.05,13.40 9.00,15.00  
16.              9.00,15.00 9.00,39.00 9.00,39.00  
17.              9.00,39.00 33.00,39.00 33.00,39.00  
18.              33.44,40.36 33.66,42.07 35.26,42.66  
19.              37.23,43.40 39.18,40.93 40.39,39.69  
20.              43.82,36.18 43.95,34.60 39.00,33.00  
21.              39.00,33.00 39.00,15.00 39.00,15.00  
22.              31.35,20.68 33.00,24.31 33.00,33.00  
23.              33.00,33.00 18.00,33.00 18.00,33.00  
24.              23.35,27.65 37.10,14.14 40.00,8.00  
25.              40.00,8.00 39.00,7.00 39.00,7.00  
26.              33.12,9.79 19.63,25.36 15.00,31.00  
27.              15.00,31.00 15.00,15.00 15.00,15.00  
28.              22.33,15.00 27.29,16.58 31.00,9.00  
29.              31.00,9.00 15.00,9.00 15.00,9.00  
30.              14.56,7.64 14.34,5.93 12.74,5.34 Z"/>
31. </vector>

這裡使用了vector繪製向量圖的方式生成狀態列圖示，而不是載入具體的圖片資源,而path裡的內容決定了圖片的樣式。

• 在frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java中修改進行截圖操作的類和方法的許可權，如下所示：

classGlobalScreenshot 宣告為 public

method takeScreenshot 宣告為public

GlobalScreenshot是實現截圖操作，圖片儲存，截圖動畫的類.

實現截圖的操作的方法是takeScreenshot();

• PhoneStatusBar中定義了一個QSTileHost物件，實參需要傳入一個ScreensShotController物件，這裡傳入的是ScreensShotController的實現類ScreensShotControllerImpl的物件，修改如下

  import com.mediatek.systemui.statusbar.policy.ScreenShotControllerImpl;
  ScreenShotControllerImpl mScreenShitController;
  
  final QSTileHost qsh=new QSTileHost(.................mScreenShotController);

• ScreenShotControllerImpl是介面ScreenShotController的實現類，內容如下：

  package com.mediatek.systemui.statusbar.policy;
  import android.content.Context;
  public class ScreenShotControllerImpl implements ScreenShotController{
  private static final String TAG="ScreenShotControllerImpl";
  private final Context mContext;
  public ScreenShotControllerImpl(Context context){
  mContext=context;
  }
  @Override
  public boolean isSupportScreenShot(){
  return ture;
  }
  }

• QStuner中存在一個類繼承了QSTileHost，同時呼叫了父類的構造方法，因此需要新增一個引數。

  public CustomHost（Context context）{
  super(context,...............,null,null,null);
  }

  最後的那個null是這次修改新增上的。