RemoteDisplayProviderWatcherpublic final class RemoteDisplayProviderWatcher extends Object | Watches for remote display provider services to be installed.
Adds a provider to the media router for each registered service. |
| Fields Summary |
|---|
| private static final String | TAG | | private static final boolean | DEBUG | | private final android.content.Context | mContext | | private final Callback | mCallback | | private final android.os.Handler | mHandler | | private final int | mUserId | | private final android.content.pm.PackageManager | mPackageManager | | private final ArrayList | mProviders | | private boolean | mRunning | | private final android.content.BroadcastReceiver | mScanPackagesReceiver | | private final Runnable | mScanPackagesRunnable |
| Constructors Summary |
|---|
public RemoteDisplayProviderWatcher(android.content.Context context, Callback callback, android.os.Handler handler, int userId)
mContext = context;
mCallback = callback;
mHandler = handler;
mUserId = userId;
mPackageManager = context.getPackageManager();
|
| Methods Summary |
|---|
| public void | dump(java.io.PrintWriter pw, java.lang.String prefix)
pw.println(prefix + "Watcher");
pw.println(prefix + " mUserId=" + mUserId);
pw.println(prefix + " mRunning=" + mRunning);
pw.println(prefix + " mProviders.size()=" + mProviders.size());
| | private int | findProvider(java.lang.String packageName, java.lang.String className)
int count = mProviders.size();
for (int i = 0; i < count; i++) {
RemoteDisplayProviderProxy provider = mProviders.get(i);
if (provider.hasComponentName(packageName, className)) {
return i;
}
}
return -1;
| | private boolean | hasCaptureVideoPermission(java.lang.String packageName)
if (mPackageManager.checkPermission(Manifest.permission.CAPTURE_VIDEO_OUTPUT,
packageName) == PackageManager.PERMISSION_GRANTED) {
return true;
}
if (mPackageManager.checkPermission(Manifest.permission.CAPTURE_SECURE_VIDEO_OUTPUT,
packageName) == PackageManager.PERMISSION_GRANTED) {
return true;
}
return false;
| | private void | scanPackages()
if (!mRunning) {
return;
}
// Add providers for all new services.
// Reorder the list so that providers left at the end will be the ones to remove.
int targetIndex = 0;
Intent intent = new Intent(RemoteDisplayState.SERVICE_INTERFACE);
for (ResolveInfo resolveInfo : mPackageManager.queryIntentServicesAsUser(
intent, 0, mUserId)) {
ServiceInfo serviceInfo = resolveInfo.serviceInfo;
if (serviceInfo != null && verifyServiceTrusted(serviceInfo)) {
int sourceIndex = findProvider(serviceInfo.packageName, serviceInfo.name);
if (sourceIndex < 0) {
RemoteDisplayProviderProxy provider =
new RemoteDisplayProviderProxy(mContext,
new ComponentName(serviceInfo.packageName, serviceInfo.name),
mUserId);
provider.start();
mProviders.add(targetIndex++, provider);
mCallback.addProvider(provider);
} else if (sourceIndex >= targetIndex) {
RemoteDisplayProviderProxy provider = mProviders.get(sourceIndex);
provider.start(); // restart the provider if needed
provider.rebindIfDisconnected();
Collections.swap(mProviders, sourceIndex, targetIndex++);
}
}
}
// Remove providers for missing services.
if (targetIndex < mProviders.size()) {
for (int i = mProviders.size() - 1; i >= targetIndex; i--) {
RemoteDisplayProviderProxy provider = mProviders.get(i);
mCallback.removeProvider(provider);
mProviders.remove(provider);
provider.stop();
}
}
| | public void | start()
if (!mRunning) {
mRunning = true;
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_PACKAGE_ADDED);
filter.addAction(Intent.ACTION_PACKAGE_REMOVED);
filter.addAction(Intent.ACTION_PACKAGE_CHANGED);
filter.addAction(Intent.ACTION_PACKAGE_REPLACED);
filter.addAction(Intent.ACTION_PACKAGE_RESTARTED);
filter.addDataScheme("package");
mContext.registerReceiverAsUser(mScanPackagesReceiver,
new UserHandle(mUserId), filter, null, mHandler);
// Scan packages.
// Also has the side-effect of restarting providers if needed.
mHandler.post(mScanPackagesRunnable);
}
| | public void | stop()
if (mRunning) {
mRunning = false;
mContext.unregisterReceiver(mScanPackagesReceiver);
mHandler.removeCallbacks(mScanPackagesRunnable);
// Stop all providers.
for (int i = mProviders.size() - 1; i >= 0; i--) {
mProviders.get(i).stop();
}
}
| | private boolean | verifyServiceTrusted(android.content.pm.ServiceInfo serviceInfo)
if (serviceInfo.permission == null || !serviceInfo.permission.equals(
Manifest.permission.BIND_REMOTE_DISPLAY)) {
// If the service does not require this permission then any app could
// potentially bind to it and cause the remote display service to
// misbehave. So we only want to trust providers that require the
// correct permissions.
Slog.w(TAG, "Ignoring remote display provider service because it did not "
+ "require the BIND_REMOTE_DISPLAY permission in its manifest: "
+ serviceInfo.packageName + "/" + serviceInfo.name);
return false;
}
if (!hasCaptureVideoPermission(serviceInfo.packageName)) {
// If the service does not have permission to capture video then it
// isn't going to be terribly useful as a remote display, is it?
// Kind of makes you wonder what it's doing there in the first place.
Slog.w(TAG, "Ignoring remote display provider service because it does not "
+ "have the CAPTURE_VIDEO_OUTPUT or CAPTURE_SECURE_VIDEO_OUTPUT "
+ "permission: " + serviceInfo.packageName + "/" + serviceInfo.name);
return false;
}
// Looks good.
return true;
|
|
