这篇文章主要讲解了“Android开发sensor旋转屏问题如何解决”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“Android开发sensor旋转屏问题如何解决”吧！
一、查询 activity xml 配置screenOrientation信息：
找个测试机器，安装此APP。as中 devices explorer界面中打开此apk安装目录，双击apk。或者把apk托到as中，在反编译的资产xml文件搜索此activity，并查看 android:screenOrientation 属性。或者使用 aapt dump xmltree 命令查看。
configChanges 属性是为了防止重启activity
<activity
android:theme="@ref/0x7f130170"
android:label="@ref/0x7f1200c6"
android:name="com.miui.gallery.activity.ExternalPhotoPageActivity"
android:screenOrientation="4"
android:configChanges="0xda0"
android:showWhenLocked="true">二、事件发生时间点分析：
事件发生时间点=录屏文件名的时间 + 录屏发生时视频经过的秒数
结合问题描述和usagestats服务的信息倒推事件发生时间点
三、logcat查看sensor激活状态：
此log是高通 sensors-hal 层打印的
状态栏--控制按钮--“方向锁定” 开启时，en=0 即 sensor关闭！
/vendor/qcom/proprietary/sensors-see/sensors-hal-2.0/framework/sensors_hal.cpp
logcat中搜索
device_orientation2021-08-09 17:07:23.037 1021-1021/? I/sensors-hal: activate:209, android.sensor.device_orientation/272 en=1
2021-08-09 17:07:23.048 1021-1021/? I/sensors-hal: activate:220, android.sensor.device_orientation/272 en=1 completed四、查看APP是否注册旋转屏sensor
有的APP注册的是加速度sensor，使用自己的算法计算
APP注册 android.view.OrientationEventListener 回调，自身代码调节旋转Demo：
private void registerOrientation(){
OrientationEventListener orientationListener = new OrientationEventListener(this) {
@Override
public void onOrientationChanged(int orientation) {
Log.d(TAG, "onOrientationChanged: " + orientation);
if (orientation == OrientationEventListener.ORIENTATION_UNKNOWN) {
return; // 手机平放时，检测不到有效的角度
}
// 设置竖屏
if (((orientation >= 0) && (orientation <= 30)) || (orientation >= 330)) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
// 设置横屏
else if (((orientation >= 230) && (orientation <= 310))) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
}
}
};
orientationListener.enable();
}五、sensorservice 信息
DUMP OF SERVICE CRITICAL sensorservice:
bugreport dumpsys sensorservice信息查看 注册的sensor信息
Previous Registrations:
17:57:12 + 0x0000002d pid=20420 uid=10265 package=android.view.OrientationEventListener samplingPeriod=200000us batchingPeriod=0us
17:57:12 + 0x0000002d pid=20420 uid=10265 package=android.view.OrientationEventListener samplingPeriod=200000us batchingPeriod=0us相关sensor：
// 加速计传感器 handle: 0x0100000b
// app通常会注册回调 android.view.OrientationEventListener 此类内部注册了 加速计sensor，用来监听旋转角度
// android.sensor.accelerometer
public static final int TYPE_ACCELEROMETER = 1;
0x0100000b) lsm6dso Accelerometer Non-wakeup | STMicro | ver: 142870 | type: android.sensor.accelerometer(1) | perm: n/a | flags: 0x00000980
continuous | minRate=1.00Hz | maxRate=415.97Hz | FIFO (max,reserved) = (10000, 3000) events | non-wakeUp |
highest rate level = 3, support shared mem: gralloc,
0x0100015f) lsm6dso Accelerometer-Uncalibrated Non-wakeup | STMicro | ver: 142870 | type: android.sensor.accelerometer_uncalibrated(35) | perm: n/a | flags: 0x00000980
continuous | minRate=1.00Hz | maxRate=415.97Hz | FIFO (max,reserved) = (10000, 3000) events | non-wakeUp |
highest rate level = 3, support shared mem: gralloc,
0x5f676273) Gyroscope Bias (debug) | AOSP | ver: 1 | type: android.sensor.accelerometer(1) | perm: n/a | flags: 0x00000000
continuous | maxDelay=0us | maxRate=415.97Hz | no batching | non-wakeUp |
// 方向传感器---用户app旋转屏 handle： 0x0100010f
// android.sensor.device_orientation
public static final int TYPE_DEVICE_ORIENTATION = 27;
0x0100010f) device_orient Non-wakeup | xiaomi | ver: 1 | type: android.sensor.device_orientation(27) | perm: n/a | flags: 0x00000002
on-change | maxDelay=0us | minDelay=0us | FIFO (max,reserved) = (10000, 0) events | non-wakeUp |
// 其 Wakeup handle： 0x01000110 com.android.server.policy.WindowOrientationListener 注册此类型
0x01000110) device_orient Wakeup | xiaomi | ver: 1 | type: android.sensor.device_orientation(27) | perm: n/a | flags: 0x00000003
on-change | maxDelay=0us | minDelay=0us | FIFO (max,reserved) = (10000, 0) events | wakeUp |bugreport device_orient 信息查看上报事件
# 0 表示通常的正常
# 1 表示顺时针旋转90度
device_orient Wakeup: last 10 events
1 (ts=68477.447943014, wall=17:49:58.724) 0.00,
2 (ts=68478.554363222, wall=17:49:59.831) 0.00,
3 (ts=68478.989033691, wall=17:50:00.265) 0.00,
4 (ts=68479.423711660, wall=17:50:00.701) 1.00,
5 (ts=68482.743111608, wall=17:50:04.022) 0.00,
6 (ts=68486.101931400, wall=17:50:07.379) 0.00,
7 (ts=68495.309003118, wall=17:50:16.585) 0.00,
8 (ts=68505.308247806, wall=17:50:26.584) 1.00,
9 (ts=68507.166153170, wall=17:50:28.444) 0.00,
10 (ts=68513.214244108, wall=17:50:34.491) 0.00,六、有现场，查看当前activity信息
logcat查看当前activity： 有很多其他日志可供查看
07-31 17:50:25.687563 4486 4486 D Nav_RecentsImpl: onResumed className=com.miui.gallery.activity.ExternalPhotoPageActivity,mIsInAnotherPro=false,isKeyguardLocked=false,mNavStubView=com.miui.home.recents.NavStubView{f994da4 G.E...... ......I. 0,0-1080,35}根据DUMP OF SERVICE usagestats:内容 查看时间点的APP
time="2021-07-08 09:29:02" type=ACTIVITY_PAUSED package=com.ainemo.dragoon class=com.meeting.call.activity.XylinkMeetingActivity instanceId=40437940 taskRootPackage=com.ainemo.dragoon taskRootClass=com.ainemo.android.activity.MainActivity flags=0x0
log的结尾：
In-memory daily stats
timeRange="2021/8/21 08:14