https://github.com/Gracker/FPSDump
https://github.com/Gracker/FPSDump
Last synced: 4 days ago
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- Host: GitHub
- URL: https://github.com/Gracker/FPSDump
- Owner: Gracker
- License: gpl-3.0
- Created: 2018-12-18T02:45:38.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2020-02-25T08:57:36.000Z (over 6 years ago)
- Last Synced: 2026-01-23T01:49:59.946Z (5 months ago)
- Language: Java
- Size: 142 KB
- Stars: 2
- Watchers: 2
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# FPSDump
这是一个用于显示 FPS 的小工具，数据是从 SurfaceFlinger 这边拿的 Flip 的数据，然后进行计算
# 编译和调试
由于获取这个需要系统签名，所以这个 App 不能直接在 Studio 上运行，需要在对应的平台签名后才可以运行。
如果需要调试UI，可以在 AndroidManifest.xml 中 去掉 android:sharedUserId="android.uid.system" ，然后就可以使用 AS安装了
## 悬浮窗权限
需要配置悬浮窗权限才可以正常显示 FPS
# 核心代码
```java
Parcel data = Parcel.obtain();
Parcel reply = Parcel.obtain();
data.writeInterfaceToken("android.ui.ISurfaceComposer");
mFlinger.transact(1013, data, reply, 0);
final int pageFlipCount = reply.readInt();
final long now = System.nanoTime();
final int frames = pageFlipCount - mLastPageFlipCount;
final long duration = now - mLastUpdateTime;
mFps = (float) (frames * 1e9 / duration);
mLastPageFlipCount = pageFlipCount;
mLastUpdateTime = now;
reply.recycle();
data.recycle();
```