android怎么调用截屏接口

下面写一下具体实现
1.定义一个意图字符串

public static final String
SYSTEM_SHOOT=”com.screenshot.quietly”

2.添加到意图过滤器
filter.addAction(SYSTEMUI_SHOOT);//添加到意图过滤器

3.接收广播
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
…..
else if(SYSTEMUI_SHOOT.equals(action)) {

Log.d("Victor","SYSTEMUI_LEKE_SHOOT: "+action);

String pp=intent.getExtra("pp").toString();//获取用户定义的图片路径

String pn= (intent.getExtra("pn")+".jpg").toString();//图片名
    Settings.System.putString(mContext.getContentResolver(),"ssp", pp);
    Settings.System.putString(mContext.getContentResolver(),"ssn", pn);
    takeScreenShot();//调用此方法做开启服务操作
    } 

}

4.执行takeScreenShot()

private void takeScreenShot() {

String imageDir=Settings.System.getString(mContext.getContentResolver(), "ssp");
String imageNam=Settings.System.getString(mContext.getContentResolver(), "ssn");
File file=new File(imageDir);
String text=null;
Log.d("Victor","imageDir="+imageDir+ ",imageName="+imageNam);

file.mkdir();

  synchronized (mScreenshotLock) {
  if (mScreenshotConnection != null) {
      return;
  } 

  ComponentName cn = new ComponentName("com.android.systemui",            "com.android.systemui.screenshot.TakeScreenshotService");
  Intent intent = new Intent();
  intent.setComponent(cn);
  ServiceConnection conn = new ServiceConnection() {
      @Override

       Log.d("Victor","onServiceConnected---------");
          synchronized (mScreenshotLock) {
                  if (mScreenshotConnection != this) {
                       return;
                  } 

   Messenger messenger = new Messenger(service);
      Message msg = Message.obtain(null, 1);
       final ServiceConnection myConn = this;
        Handler h = new               Handler(mHandler.getLooper()) {
              @Override
              public void handleMessage(Message msg) {
                      synchronized (mScreenshotLock) {
                   if (mScreenshotConnection == myConn) {             
          mContext.unbindService(mScreenshotConnection);                           
          mScreenshotConnection = null;                               mHandler.removeCallbacks(mScreenshotTimeout);
                          }
                      }
                  }
              };
                  msg.replyTo = new Messenger(h);
                  msg.arg1=0;
                  msg.arg2=1;
                  try {
                  messenger.send(msg);
              } catch (RemoteException e) {
              }
          }
      }

          @Override
          public void onServiceDisconnected(ComponentName name) {}
      };
      if (mContext.bindService(intent, conn, Context.BIND_AUTO_CREATE)) {
          mScreenshotConnection = conn;
          mHandler.postDelayed(mScreenshotTimeout, 10000);
      }
  }

}