Android 7.1.1 系统截屏

从来好事天生俭，自古瓜儿苦后甜。这篇文章主要讲述Android 7.1.1 系统截屏相关的知识，希望能为你提供帮助。
frameworks/base/packages/SystemUI/src/com/android/systemui/screenshot/TakeScreenshotService.java
【Android 7.1.1 系统截屏】

文章图片

TakeScreenshotService.java

package com.android.systemui.screenshot; import android.app.Service; import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.os.UserManager; import android.util.Log; import android.view.WindowManager; public class TakeScreenshotService extends Service { private static final String TAG = "TakeScreenshotService"; private static GlobalScreenshot mScreenshot; private Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { final Messenger callback = msg.replyTo; Runnable finisher = new Runnable() { @Override public void run() { Message reply = Message.obtain(null, 1); try { callback.send(reply); } catch (RemoteException e) { } } }; // If the storage for this user is locked, we have no place to store // the screenshot, so skip taking it instead of showing a misleading // animation and error notification. if (!getSystemService(UserManager.class).isUserUnlocked()) { Log.w(TAG, "Skipping screenshot because storage is locked!"); post(finisher); return; }if (mScreenshot == null) { mScreenshot = new GlobalScreenshot(TakeScreenshotService.this); }switch (msg.what) { case WindowManager.TAKE_SCREENSHOT_FULLSCREEN: mScreenshot.takeScreenshot(finisher, msg.arg1 > 0, msg.arg2 > 0); break; case WindowManager.TAKE_SCREENSHOT_SELECTED_REGION: mScreenshot.takeScreenshotPartial(finisher, msg.arg1 > 0, msg.arg2 > 0); break; } } }; @Override public IBinder onBind(Intent intent) { return new Messenger(mHandler).getBinder(); }@Override public boolean onUnbind(Intent intent) { if (mScreenshot != null) mScreenshot.stopScreenshot(); return true; } }

主要是创建一个 GlobalScreenshot 对象，通过GlobalScreenshot对象实现截屏，之所以将该类宿主在service里面是因为截屏可能产生耗时，这应该是设计时的理念。
当然完全可以由自己创建GlobalScreenshot对象，在线程里面实现截屏.