android在安卓中通过修改WMS在应用加载时通过判断系统方向来加载应用的界面方向而不是使用应用默认方向
时间: 2023-12-12 07:02:41 浏览: 37
在Android中,可以通过修改WindowManagerService(WMS)来实现在应用加载时通过判断系统方向来加载应用的界面方向。
具体步骤如下:
1. 找到系统中的WMS代码文件,一般在frameworks\base\services\core\java\com\android\server\wm\WindowManagerService.java。
2. 在WMS中找到以下方法:
```java
public void addWindow(Session session, IWindow client, int seq, WindowManager.LayoutParams attrs, int viewVisibility, Rect outContentInsets, Rect outStableInsets, Rect outOutsets, ParcelableWrapper outBackdropFrame, MergedConfiguration mergedConfiguration, SurfaceSession outSurfaceSession, IInputMethodClient inputMethodClient, IInputContext inputContext, int displayId, int parentWindowHandle, int[] appOp, int requestCode, int windowType, boolean isRoundedCornerOverlay, int targetSdkVersion, boolean inMultiWindowMode, boolean inPictureInPictureMode, int rotationAnimationHint, boolean alwaysFocusable, int userId, WindowInfo windowInfo) {
// add window code here
}
```
3. 在addWindow方法中,根据系统方向和应用的方向来判断应用的界面方向,然后设置LayoutParams中的screenOrientation属性,如下所示:
```java
public void addWindow(Session session, IWindow client, int seq, WindowManager.LayoutParams attrs, int viewVisibility, Rect outContentInsets, Rect outStableInsets, Rect outOutsets, ParcelableWrapper outBackdropFrame, MergedConfiguration mergedConfiguration, SurfaceSession outSurfaceSession, IInputMethodClient inputMethodClient, IInputContext inputContext, int displayId, int parentWindowHandle, int[] appOp, int requestCode, int windowType, boolean isRoundedCornerOverlay, int targetSdkVersion, boolean inMultiWindowMode, boolean inPictureInPictureMode, int rotationAnimationHint, boolean alwaysFocusable, int userId, WindowInfo windowInfo) {
int rotation = mDisplayManagerInternal.getRotation(displayId);
int appOrientation = attrs.screenOrientation;
int systemOrientation = mPolicy.getRotation();
if (appOrientation == ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED && (systemOrientation == Surface.ROTATION_90 || systemOrientation == Surface.ROTATION_270)) {
attrs.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
} else if (appOrientation == ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED && (systemOrientation == Surface.ROTATION_0 || systemOrientation == Surface.ROTATION_180)) {
attrs.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
}
// add window code here
}
```
在上面的代码中,如果应用的方向为SCREEN_ORIENTATION_UNSPECIFIED(即应用的默认方向),并且系统方向为横屏,则将LayoutParams中的screenOrientation属性设置为SCREEN_ORIENTATION_LANDSCAPE(横屏);如果系统方向为竖屏,则将screenOrientation属性设置为SCREEN_ORIENTATION_PORTRAIT(竖屏)。
4. 重新编译Android源代码并刷入设备,即可实现在应用加载时通过判断系统方向来加载应用的界面方向。