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RegisteredMediaRouteProviderWatcher.javaAPI DocAndroid 5.1 API5677Thu Mar 12 22:22:56 GMT 2015android.support.v7.media

RegisteredMediaRouteProviderWatcher

public final class RegisteredMediaRouteProviderWatcher extends Object
Watches for media route provider services to be installed. Adds a provider to the media router for each registered service.
see
RegisteredMediaRouteProvider

Fields Summary
private final android.content.Context
mContext
private final Callback
mCallback
private final android.os.Handler
mHandler
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 RegisteredMediaRouteProviderWatcher(android.content.Context context, Callback callback)


         
        mContext = context;
        mCallback = callback;
        mHandler = new Handler();
        mPackageManager = context.getPackageManager();
Methods Summary
private intfindProvider(java.lang.String packageName, java.lang.String className)

        int count = mProviders.size();
        for (int i = 0; i < count; i++) {
            RegisteredMediaRouteProvider provider = mProviders.get(i);
            if (provider.hasComponentName(packageName, className)) {
                return i;
            }
        }
        return -1;
private voidscanPackages()

        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(MediaRouteProviderService.SERVICE_INTERFACE);
        for (ResolveInfo resolveInfo : mPackageManager.queryIntentServices(intent, 0)) {
            ServiceInfo serviceInfo = resolveInfo.serviceInfo;
            if (serviceInfo != null) {
                int sourceIndex = findProvider(serviceInfo.packageName, serviceInfo.name);
                if (sourceIndex < 0) {
                    RegisteredMediaRouteProvider provider =
                            new RegisteredMediaRouteProvider(mContext,
                            new ComponentName(serviceInfo.packageName, serviceInfo.name));
                    provider.start();
                    mProviders.add(targetIndex++, provider);
                    mCallback.addProvider(provider);
                } else if (sourceIndex >= targetIndex) {
                    RegisteredMediaRouteProvider 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--) {
                RegisteredMediaRouteProvider provider = mProviders.get(i);
                mCallback.removeProvider(provider);
                mProviders.remove(provider);
                provider.stop();
            }
        }
public voidstart()

        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.registerReceiver(mScanPackagesReceiver, filter, null, mHandler);

            // Scan packages.
            // Also has the side-effect of restarting providers if needed.
            mHandler.post(mScanPackagesRunnable);
        }
public voidstop()

        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();
            }
        }