android6.0在状态栏添加一键截屏

• 在配置文件frameworks/base/packages/SystemUI/res/values/config.xml下添加screenshot

 <string name="quick_setting_tiles_default" translatable="false">
     wifi,bt,inversion,dnd,cell,airplane,rotation,flashlight,location,cast,hotspot,screenshot
 string>

• 在frameworks/base/packages/SystemUI/src/com/android.systemui/statusbar/phone/QSTileHost.java中得到config.xml中的数据，并进行判断，在方法createTile()中添加

 else if(tileSpec.equals(“screenshot”)) return new ScreenShotTile(this);

• 在QSTileHost.java中还需要往构造方法中传入一个ScreenShotController对象，需要添加如下内容：

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

• 这里涉及到了ScreenShotController，于是我们要去定义它，ScreenShotController是一个接口，内容如下：

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

  
  
• 完成ScreenShotTile类，在这个方法中需要完成状态栏图标显示和截屏操作，可以参考其他生成Tile的方法来完成显示图标的方法。该类继承了QSTile类，所以要清楚QSTile这个类的内容。QSTile类中需要添加的内容如下：

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

• ScreenShotTile类的实现如下所示：

 public class ScreenShotTile extends QSTile {
     private static final String TAG = "ScreenShotTile";
     private static final int SCREEN_SHOT_MESSAGE = 10000;
     private static GlobalScreenshot mScreenshot;

     Handler mHandler = new Handler() {
         public void handleMessage(Message msg) {
             switch (msg.what) {
             case TAKE_SCREEN_SHOT_MESSAGE:
                 final Messenger callback = msg.replyTo;
                 if (mScreenshot == null) {
                     mScreenshot = new GlobalScreenshot(mContext);
                 }
                 mScreenshot.takeScreenshot(new Runnable() {
                     @Override public void run() {
                         Message reply = Message.obtain(null, 1);
                         try {
                             if(callback != null){
                                 callback.send(reply);
                             }
                         }catch(RemoteException e){
                         }
                     }
                 }, msg.arg1 > 0, msg.arg2 > 0);
                 break;
             default:
                 break;
             }
         }
     };

     public TakeScreenShotTile(Host host) {
         super(host);
     }

     @Override
     protected BooleanState newTileState() {
         return new BooleanState();
     }

     @Override
     public void setListening(boolean listening) {
     }

     @Override
     protected void handleClick() {
         mHost.startSettingsActivity(new Intent());
         Message msg = mHandler.obtainMessage(SCREEN_SHOT_MESSAGE);
         mHandler.sendMessageDelayed(msg,1000);
     }
     @Override
     protected void handleLongClick() {
         mHost.startSettingsActivity(new Intent());
         Message msg = mHandler.obtainMessage(SCREEN_SHOT_MESSAGE);
         mHandler.sendMessageDelayed(msg,1000);
     }

     @Override
     protected void handleUpdateState(BooleanState state, Object arg) {
         state.value=false;
         state.autoMirrorDrawable=false;
         state.label = mContext.getString(R.string.screenshot);//加载字符串资源
         state.icon = ResourceIcon.get(R.drawable.ic_qs_screenshot);//加载图片资源}
 @Override
  public int getMetricsCategory(){
 return MetricsLogger.QS_SCREEN_SHOT;
 }
 }

• 在frameworks/base/packages/SystemUI/res/中添加对应的字符串和相应分辨率下的图片资源。

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

 <string name=screenshot>ScreenShotstring>

2.      在frameworks/base/packages/SystemUI/res/drawable目录下新建文件ic_qs_screenshot.xml，文件内容如下：

 <vector xmlns:android="http://schemas.android.com/apk/res/android"
           android:width="64dp"
           android:height="64dp"
           android:viewportWidth="48.0"
           android:viewportHeight="48.0"
     <path
         android:fillColor="#FFFFFFFF"
         android:pathData="M 48.00,0.00
            C 48.00,0.00 48.00,48.00 48.00,48.00
              48.00,48.00 0.00,48.00 0.00,48.00
              0.00,48.00 0.00,0.00 0.00,0.00
              0.00,0.00 48.00,0.00 48.00,0.00 Z
            M 12.74,5.34
            C 10.77,4.60 8.82,7.07 7.61,8.31
              4.18,11.82 4.05,13.40 9.00,15.00
              9.00,15.00 9.00,39.00 9.00,39.00
              9.00,39.00 33.00,39.00 33.00,39.00
              33.44,40.36 33.66,42.07 35.26,42.66
              37.23,43.40 39.18,40.93 40.39,39.69
              43.82,36.18 43.95,34.60 39.00,33.00
              39.00,33.00 39.00,15.00 39.00,15.00
              31.35,20.68 33.00,24.31 33.00,33.00
              33.00,33.00 18.00,33.00 18.00,33.00
              23.35,27.65 37.10,14.14 40.00,8.00
              40.00,8.00 39.00,7.00 39.00,7.00
              33.12,9.79 19.63,25.36 15.00,31.00
              15.00,31.00 15.00,15.00 15.00,15.00
              22.33,15.00 27.29,16.58 31.00,9.00
              31.00,9.00 15.00,9.00 15.00,9.00
              14.56,7.64 14.34,5.93 12.74,5.34 Z"/>
 vector>

这里使用了vector绘制矢量图的方式生成状态栏图标，而不是加载具体的图片资源,而path里的内容决定了图片的样式。

• 在frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java中修改进行截屏操作的类和方法的权限，如下所示：

classGlobalScreenshot 声明为 public

method takeScreenshot 声明为public

GlobalScreenshot是实现截屏操作，图片保存，截屏动画的类.

实现截屏的操作的方法是takeScreenshot();

• PhoneStatusBar中定义了一个QSTileHost对象，实参需要传入一个ScreensShotController对象，这里传入的是ScreensShotController的实现类ScreensShotControllerImpl的对象，修改如下

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

• ScreenShotControllerImpl是接口ScreenShotController的实现类，内容如下：

  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中存在一个类继承了QSTileHost，同时调用了父类的构造方法，因此需要添加一个参数。

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

  最后的那个null是这次修改添加上的。