Android 6.0 以上版本提示“检测到屏幕叠加层”的问题，规避方法
android 6.0 检测到屏幕叠加层的问题，是google针对用户安全的机制。
但是此机制很影响用户的体验感。
在fragment的规避方法是，安装第三应用。如果存在SYSTEM_ALERT_WINDOW 权限。默认关闭此应用的此权限。
在PMS中：
case POST_INSTALL: {
if (DEBUG_INSTALL) Log.v(TAG, "Handling post-install for " + msg.arg1);
PostInstallData data = mRunningInstalls.get(msg.arg1);
mRunningInstalls.delete(msg.arg1);
boolean deleteOld = false;
if (data != null) {
InstallArgs args = data.args;
PackageInstalledInfo res = data.res;
if (res.returnCode == PackageManager.INSTALL_SUCCEEDED) {
final String packageName = res.pkg.applicationInfo.packageName;
res.removedInfo.sendBroadcast(false, true, false);
Bundle extras = new Bundle(1);
extras.putInt(Intent.EXTRA_UID, res.uid);
// Now that we successfully installed the package, grant runtime
// permissions if requested before broadcasting the install.
if ((args.installFlags
& PackageManager.INSTALL_GRANT_RUNTIME_PERMISSIONS) != 0) {
grantRequestedRuntimePermissions(res.pkg, args.user.getIdentifier(),
args.installGrantPermissions);
}
// Determine the set of users who are adding this
// package for the first time vs. those who are seeing
// an update.
int[] firstUsers;
int[] updateUsers = new int[0];
if (res.origUsers == null || res.origUsers.length == 0) {
firstUsers = res.newUsers;
} else {
firstUsers = new int[0];
for (int i=0; i
boolean isNew = true;
for (int j=0; j
isNew = false;
break;
}
}
if (isNew) {
int[] newFirst = new int[firstUsers.length+1];
System.arraycopy(firstUsers, 0, newFirst, 0,
firstUsers.length);
newFirst[firstUsers.length] = user;
firstUsers = newFirst;
} else {
int[] newUpdate = new int[updateUsers.length+1];
System.arraycopy(updateUsers, 0, newUpdate, 0,
updateUsers.length);
newUpdate[updateUsers.length] = user;
updateUsers = newUpdate;
}
}
}
sendPackageBroadcast(Intent.ACTION_PACKAGE_ADDED,
packageName, extras, null, null, firstUsers);
final boolean update = res.removedInfo.removedPackage != null;
if (update) {
extras.putBoolean(Intent.EXTRA_REPLACING, true);
}
sendPackageBroadcast(Intent.ACTION_PACKAGE_ADDED,
packageName, extras, null, null, updateUsers);
if (update) {
sendPackageBroadcast(Intent.ACTION_PACKAGE_REPLACED,
packageName, extras, null, null, updateUsers);
sendPackageBroadcast(Intent.ACTION_MY_PACKAGE_REPLACED,
null, null, packageName, null, updateUsers);
// treat asec-hosted packages like removable media on upgrade
/* SPRD: support double sdcard
* Add support for install apk to internal sdcard @{
* @orig
* if (res.pkg.isForwardLocked() || isExternal(res.pkg)) {
*/
if (res.pkg.isForwardLocked() || isExternal(res.pkg) || isInternalSd(res.pkg)) {
/* @} */
if (DEBUG_INSTALL) {
Slog.i(TAG, "upgrading pkg " + res.pkg
+ " is ASEC-hosted -> AVAILABLE");
}
int[] uidArray = new int[] { res.pkg.applicationInfo.uid };
ArrayList
pkgList.add(packageName);
sendResourcesChangedBroadcast(true, true,
pkgList,uidArray, null);
}
}
if (res.removedInfo.args != null) {
// Remove the replaced package's older resources safely now
deleteOld = true;
}
// If this app is a browser and it's newly-installed for some
// users, clear any default-browser state in those users
if (firstUsers.length > 0) {
// the app's nature doesn't depend on the user, so we can just
// check its browser nature in any user and generalize.
if (packageIsBrowser(packageName, firstUsers[0])) {
synchronized (mPackages) {
for (int userId : firstUsers) {
mSettings.setDefaultBrowserPackageNameLPw(null, userId);
}
}
}
}
// Log current value of "unknown sources" setting
EventLog.writeEvent(EventLogTags.UNKNOWN_SOURCES_ENABLED,
getUnknownSourcesSettings());
/*SUN:jicong.wang modify for system alert window off start {@*/
String[] pkgs = getAppOpPermissionPackages(Manifest.permission.SYSTEM_ALERT_WINDOW);
for (String pkg : pkgs) {
//Log.d(TAG,"SUN:jicong.wang system alert window permission pkg is "+pkg);
if (pkg.equals(packageName)) {
Log.d(TAG,"SUN:jicong.wang system alert window permission off pkg is "+pkg);
AppOpsManager appops = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
appops.setMode(AppOpsManager.OP_SYSTEM_ALERT_WINDOW, res.pkg.applicationInfo.uid, packageName, AppOpsManager.MODE_ERRORED);
}
}
/*SUN:jicong.wang modify for system alert window off end @}*/
}