Properly configure live wallpaper selection following restore (2471a372) · Commits · e / os / android_frameworks_base

packages/WallpaperBackup/src/com/android/wallpaperbackup/WallpaperBackupAgent.java

+61 −1

Original line number	Diff line number	Diff line
		@@ -19,17 +19,22 @@ package com.android.wallpaperbackup;
		import static android.app.WallpaperManager.FLAG_LOCK;
		import static android.app.WallpaperManager.FLAG_SYSTEM;

		import android.app.AppGlobals;
		import android.app.WallpaperManager;
		import android.app.backup.BackupAgent;
		import android.app.backup.BackupDataInput;
		import android.app.backup.BackupDataOutput;
		import android.app.backup.FullBackupDataOutput;
		import android.content.ComponentName;
		import android.content.Context;
		import android.content.SharedPreferences;
		import android.content.pm.IPackageManager;
		import android.content.pm.PackageInfo;
		import android.graphics.Rect;
		import android.os.Environment;
		import android.os.FileUtils;
		import android.os.ParcelFileDescriptor;
		import android.os.RemoteException;
		import android.os.UserHandle;
		import android.util.Slog;
		import android.util.Xml;
		@@ -217,6 +222,19 @@ public class WallpaperBackupAgent extends BackupAgent {
		// wallpaper image present.
		restoreFromStage(imageStage, infoStage, "wp", sysWhich);
		restoreFromStage(lockImageStage, infoStage, "kwp", FLAG_LOCK);

		// And reset to the wallpaper service we should be using
		ComponentName wpService = parseWallpaperComponent(infoStage, "wp");
		if (servicePackageExists(wpService)) {
		if (DEBUG) {
		Slog.i(TAG, "Using wallpaper service " + wpService);
		}
		mWm.setWallpaperComponent(wpService, UserHandle.USER_SYSTEM);
		} else {
		if (DEBUG) {
		Slog.v(TAG, "Can't use wallpaper service " + wpService);
		}
		}
		} catch (Exception e) {
		Slog.e(TAG, "Unable to restore wallpaper: " + e.getMessage());
		} finally {
		@@ -274,18 +292,60 @@ public class WallpaperBackupAgent extends BackupAgent {
		} while (type != XmlPullParser.END_DOCUMENT);
		} catch (Exception e) {
		// Whoops; can't process the info file at all. Report failure.
		Slog.w(TAG, "Failed to parse restored metadata: " + e.getMessage());
		Slog.w(TAG, "Failed to parse restored crop: " + e.getMessage());
		return null;
		}

		return cropHint;
		}

		private ComponentName parseWallpaperComponent(File wallpaperInfo, String sectionTag) {
		ComponentName name = null;
		try (FileInputStream stream = new FileInputStream(wallpaperInfo)) {
		final XmlPullParser parser = Xml.newPullParser();
		parser.setInput(stream, StandardCharsets.UTF_8.name());

		int type;
		do {
		type = parser.next();
		if (type == XmlPullParser.START_TAG) {
		String tag = parser.getName();
		if (sectionTag.equals(tag)) {
		final String parsedName = parser.getAttributeValue(null, "component");
		name = (parsedName != null)
		? ComponentName.unflattenFromString(parsedName)
		: null;
		break;
		}
		}
		} while (type != XmlPullParser.END_DOCUMENT);
		} catch (Exception e) {
		// Whoops; can't process the info file at all. Report failure.
		Slog.w(TAG, "Failed to parse restored component: " + e.getMessage());
		return null;
		}
		return name;
		}

		private int getAttributeInt(XmlPullParser parser, String name, int defValue) {
		final String value = parser.getAttributeValue(null, name);
		return (value == null) ? defValue : Integer.parseInt(value);
		}

		private boolean servicePackageExists(ComponentName comp) {
		try {
		if (comp != null) {
		final IPackageManager pm = AppGlobals.getPackageManager();
		final PackageInfo info = pm.getPackageInfo(comp.getPackageName(),
		0, UserHandle.USER_SYSTEM);
		return (info != null);
		}
		} catch (RemoteException e) {
		Slog.e(TAG, "Unable to contact package manager");
		}
		return false;
		}

		//
		// Key/value API: abstract, therefore required; but not used
		//