[英]Change main Android screen orientation?
我有一台设备,它的方向显然有问题,因为重新启动后大约一个小时,它会根据方向的变化旋转屏幕-然后在“桌面”上都将停止响应级别和应用程序级别。
因此,我找到了使用Button通过编程方式更改屏幕方向的方法 ,并假定可以创建一个“仅图标按钮”应用程序,该应用程序在按下时将不会运行新的应用程序,而只是尝试更改方向。
“仅图标/按钮”应用程序的框架是锁定屏幕的副本(it.reyboz.screenlock) 。 我将此项目发布在一个要点上-但由于默认情况下要在文件夹中很难包含文件夹(和二进制文件),因此可以使用以下步骤获取代码:
git clone https://gist.github.com/e6422677cababc17526d0cb57aceb76a.git dl_archive_git
cd dl_archive_git
bash run-me-to-unpack.sh
# check upacked dir:
tree rotate-btn-droid
cd rotate-btn-droid/
# change your SDK path (ASDKPATH) in buildme.sh, and then:
bash buildme.sh
# if your java install is not in the path, then call the last command with JAVA_HOME prepended:
# JAVA_HOME=/path/to/jdkXXX bash buildme.sh
基本上,我只是想在MainActivity.java
执行以下操作:
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
int orientation = display.getOrientation();
// OR: orientation = getRequestedOrientation(); // inside an Activity
switch(orientation) {
case Configuration.ORIENTATION_PORTRAIT:
setRequestedOrientation (Build.VERSION.SDK_INT < 9 ?
ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE :
ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE);
break;
case Configuration.ORIENTATION_LANDSCAPE:
setRequestedOrientation (Build.VERSION.SDK_INT < 9 ?
ActivityInfo.SCREEN_ORIENTATION_PORTRAIT :
ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT);
break;
}
...但是,当我单击应用程序图标并运行此代码时,什么也没有发生。
因此,我的问题是-原则上是否可以在“桌面”级别上强制更改设备方向? 如果是这样,它是否依赖于Android版本(可能是供应商品牌)-以及如何?
只是好奇,所以尝试了Sam的解决方案并进行了一些更改:
在Manifest
需要此权限
权限<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
同样,此权限也是危险的权限,但是如果您要从Play商店安装应用,则无需担心。
我做了一个类似这样的窗口服务:
public class MyServiceNew extends Service {
private View view;
public MyServiceNew() {
}
@Override
public IBinder onBind(Intent intent) {
throw new UnsupportedOperationException("Not yet implemented");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
int flag = intent.getExtras().getInt("Flag");
WindowManager.LayoutParams layout;
if (flag == 1) {
layout = generateLayoutLandscape();
} else {
layout = generateLayoutPortrait();
}
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(view, layout);
return super.onStartCommand(intent, flags, startId);
}
private WindowManager.LayoutParams generateLayoutPortrait() {
Toast.makeText(this, "Port", Toast.LENGTH_LONG).show();
view = new View(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSPARENT);
params.alpha = 0f;
params.width = 0;
params.height = 0;
//The orientation to force
params.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
return params;
}
private WindowManager.LayoutParams generateLayoutLandscape() {
Toast.makeText(this, "Land", Toast.LENGTH_LONG).show();
view = new View(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSPARENT);
params.alpha = 0f;
params.width = 0;
params.height = 0;
//The orientation to force
params.screenOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
return params;
}
}
并且在开发时从您的Activity中确保您包含ACTION_MANAGE_OVERLAY_PERMISSION
; 同样,您无需担心将通过Google Play Store
安装应用的用户。 这里使用下面的代码允许对M以上的设备进行许可:
public void requestSystemAlertPermission(int requestCode) {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
return;
final String packageName = getPackageName();
final Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + packageName));
startActivityForResult(intent, requestCode);
}
现在,只需启动您的服务并通过肖像或风景附加功能,我将1用于风景,将2用于肖像
Intent intentLand = new Intent(SoNew.this, MyServiceNew.class);
intentLand.putExtra("Flag", 2); //or change 1 for Port
startService(intentLand);
希望这可以帮助 :)
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