| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.content; |
| |
| import android.app.Activity; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.net.Uri; |
| |
| import java.util.HashSet; |
| |
| /** |
| * Helper class for monitoring the state of packages: adding, removing, |
| * updating, and disappearing and reappearing on the SD card. |
| */ |
| public abstract class PackageMonitor extends android.content.BroadcastReceiver { |
| static final IntentFilter sPackageFilt = new IntentFilter(); |
| static final IntentFilter sNonDataFilt = new IntentFilter(); |
| static final IntentFilter sExternalFilt = new IntentFilter(); |
| |
| static { |
| sPackageFilt.addAction(Intent.ACTION_PACKAGE_ADDED); |
| sPackageFilt.addAction(Intent.ACTION_PACKAGE_REMOVED); |
| sPackageFilt.addAction(Intent.ACTION_PACKAGE_CHANGED); |
| sPackageFilt.addAction(Intent.ACTION_QUERY_PACKAGE_RESTART); |
| sPackageFilt.addAction(Intent.ACTION_PACKAGE_RESTARTED); |
| sPackageFilt.addAction(Intent.ACTION_UID_REMOVED); |
| sPackageFilt.addDataScheme("package"); |
| sNonDataFilt.addAction(Intent.ACTION_UID_REMOVED); |
| sExternalFilt.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE); |
| sExternalFilt.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE); |
| } |
| |
| final HashSet<String> mUpdatingPackages = new HashSet<String>(); |
| |
| Context mRegisteredContext; |
| String[] mDisappearingPackages; |
| String[] mAppearingPackages; |
| String[] mModifiedPackages; |
| int mChangeType; |
| boolean mSomePackagesChanged; |
| |
| String[] mTempArray = new String[1]; |
| |
| public void register(Context context, boolean externalStorage) { |
| if (mRegisteredContext != null) { |
| throw new IllegalStateException("Already registered"); |
| } |
| mRegisteredContext = context; |
| context.registerReceiver(this, sPackageFilt); |
| context.registerReceiver(this, sNonDataFilt); |
| if (externalStorage) { |
| context.registerReceiver(this, sExternalFilt); |
| } |
| } |
| |
| public void unregister() { |
| if (mRegisteredContext == null) { |
| throw new IllegalStateException("Not registered"); |
| } |
| mRegisteredContext.unregisterReceiver(this); |
| mRegisteredContext = null; |
| } |
| |
| //not yet implemented |
| boolean isPackageUpdating(String packageName) { |
| synchronized (mUpdatingPackages) { |
| return mUpdatingPackages.contains(packageName); |
| } |
| } |
| |
| public void onBeginPackageChanges() { |
| } |
| |
| public void onPackageAdded(String packageName, int uid) { |
| } |
| |
| public void onPackageRemoved(String packageName, int uid) { |
| } |
| |
| public void onPackageUpdateStarted(String packageName, int uid) { |
| } |
| |
| public void onPackageUpdateFinished(String packageName, int uid) { |
| } |
| |
| public void onPackageChanged(String packageName, int uid, String[] components) { |
| } |
| |
| public boolean onHandleForceStop(Intent intent, String[] packages, int uid, boolean doit) { |
| return false; |
| } |
| |
| public void onUidRemoved(int uid) { |
| } |
| |
| public void onPackagesAvailable(String[] packages) { |
| } |
| |
| public void onPackagesUnavailable(String[] packages) { |
| } |
| |
| public static final int PACKAGE_UNCHANGED = 0; |
| public static final int PACKAGE_UPDATING = 1; |
| public static final int PACKAGE_TEMPORARY_CHANGE = 2; |
| public static final int PACKAGE_PERMANENT_CHANGE = 3; |
| |
| public void onPackageDisappeared(String packageName, int reason) { |
| } |
| |
| public void onPackageAppeared(String packageName, int reason) { |
| } |
| |
| public void onPackageModified(String packageName) { |
| } |
| |
| public boolean didSomePackagesChange() { |
| return mSomePackagesChanged; |
| } |
| |
| public int isPackageAppearing(String packageName) { |
| if (mAppearingPackages != null) { |
| for (int i=mAppearingPackages.length-1; i>=0; i--) { |
| if (packageName.equals(mAppearingPackages[i])) { |
| return mChangeType; |
| } |
| } |
| } |
| return PACKAGE_UNCHANGED; |
| } |
| |
| public boolean anyPackagesAppearing() { |
| return mAppearingPackages != null; |
| } |
| |
| public int isPackageDisappearing(String packageName) { |
| if (mDisappearingPackages != null) { |
| for (int i=mDisappearingPackages.length-1; i>=0; i--) { |
| if (packageName.equals(mDisappearingPackages[i])) { |
| return mChangeType; |
| } |
| } |
| } |
| return PACKAGE_UNCHANGED; |
| } |
| |
| public boolean anyPackagesDisappearing() { |
| return mDisappearingPackages != null; |
| } |
| |
| public boolean isPackageModified(String packageName) { |
| if (mModifiedPackages != null) { |
| for (int i=mModifiedPackages.length-1; i>=0; i--) { |
| if (packageName.equals(mModifiedPackages[i])) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| public void onSomePackagesChanged() { |
| } |
| |
| public void onFinishPackageChanges() { |
| } |
| |
| String getPackageName(Intent intent) { |
| Uri uri = intent.getData(); |
| String pkg = uri != null ? uri.getSchemeSpecificPart() : null; |
| return pkg; |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| onBeginPackageChanges(); |
| |
| mDisappearingPackages = mAppearingPackages = null; |
| mSomePackagesChanged = false; |
| |
| String action = intent.getAction(); |
| if (Intent.ACTION_PACKAGE_ADDED.equals(action)) { |
| String pkg = getPackageName(intent); |
| int uid = intent.getIntExtra(Intent.EXTRA_UID, 0); |
| // We consider something to have changed regardless of whether |
| // this is just an update, because the update is now finished |
| // and the contents of the package may have changed. |
| mSomePackagesChanged = true; |
| if (pkg != null) { |
| mAppearingPackages = mTempArray; |
| mTempArray[0] = pkg; |
| if (intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) { |
| mModifiedPackages = mTempArray; |
| mChangeType = PACKAGE_UPDATING; |
| onPackageUpdateFinished(pkg, uid); |
| onPackageModified(pkg); |
| } else { |
| mChangeType = PACKAGE_PERMANENT_CHANGE; |
| onPackageAdded(pkg, uid); |
| } |
| onPackageAppeared(pkg, mChangeType); |
| if (mChangeType == PACKAGE_UPDATING) { |
| synchronized (mUpdatingPackages) { |
| mUpdatingPackages.remove(pkg); |
| } |
| } |
| } |
| } else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) { |
| String pkg = getPackageName(intent); |
| int uid = intent.getIntExtra(Intent.EXTRA_UID, 0); |
| if (pkg != null) { |
| mDisappearingPackages = mTempArray; |
| mTempArray[0] = pkg; |
| if (intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) { |
| mChangeType = PACKAGE_UPDATING; |
| synchronized (mUpdatingPackages) { |
| //not used for now |
| //mUpdatingPackages.add(pkg); |
| } |
| onPackageUpdateStarted(pkg, uid); |
| } else { |
| mChangeType = PACKAGE_PERMANENT_CHANGE; |
| // We only consider something to have changed if this is |
| // not a replace; for a replace, we just need to consider |
| // it when it is re-added. |
| mSomePackagesChanged = true; |
| onPackageRemoved(pkg, uid); |
| } |
| onPackageDisappeared(pkg, mChangeType); |
| } |
| } else if (Intent.ACTION_PACKAGE_CHANGED.equals(action)) { |
| String pkg = getPackageName(intent); |
| int uid = intent.getIntExtra(Intent.EXTRA_UID, 0); |
| String[] components = intent.getStringArrayExtra( |
| Intent.EXTRA_CHANGED_COMPONENT_NAME_LIST); |
| if (pkg != null) { |
| mModifiedPackages = mTempArray; |
| mTempArray[0] = pkg; |
| onPackageChanged(pkg, uid, components); |
| // XXX Don't want this to always cause mSomePackagesChanged, |
| // since it can happen a fair amount. |
| onPackageModified(pkg); |
| } |
| } else if (Intent.ACTION_QUERY_PACKAGE_RESTART.equals(action)) { |
| mDisappearingPackages = intent.getStringArrayExtra(Intent.EXTRA_PACKAGES); |
| mChangeType = PACKAGE_TEMPORARY_CHANGE; |
| boolean canRestart = onHandleForceStop(intent, |
| mDisappearingPackages, |
| intent.getIntExtra(Intent.EXTRA_UID, 0), false); |
| if (canRestart) setResultCode(Activity.RESULT_OK); |
| } else if (Intent.ACTION_PACKAGE_RESTARTED.equals(action)) { |
| mDisappearingPackages = new String[] {getPackageName(intent)}; |
| mChangeType = PACKAGE_TEMPORARY_CHANGE; |
| onHandleForceStop(intent, mDisappearingPackages, |
| intent.getIntExtra(Intent.EXTRA_UID, 0), true); |
| } else if (Intent.ACTION_UID_REMOVED.equals(action)) { |
| onUidRemoved(intent.getIntExtra(Intent.EXTRA_UID, 0)); |
| } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE.equals(action)) { |
| String[] pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); |
| mAppearingPackages = pkgList; |
| mChangeType = PACKAGE_TEMPORARY_CHANGE; |
| mSomePackagesChanged = true; |
| if (pkgList != null) { |
| onPackagesAvailable(pkgList); |
| for (int i=0; i<pkgList.length; i++) { |
| onPackageAppeared(pkgList[i], PACKAGE_TEMPORARY_CHANGE); |
| } |
| } |
| } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) { |
| String[] pkgList = intent.getStringArrayExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST); |
| mDisappearingPackages = pkgList; |
| mChangeType = PACKAGE_TEMPORARY_CHANGE; |
| mSomePackagesChanged = true; |
| if (pkgList != null) { |
| onPackagesUnavailable(pkgList); |
| for (int i=0; i<pkgList.length; i++) { |
| onPackageDisappeared(pkgList[i], PACKAGE_TEMPORARY_CHANGE); |
| } |
| } |
| } |
| |
| if (mSomePackagesChanged) { |
| onSomePackagesChanged(); |
| } |
| |
| onFinishPackageChanges(); |
| } |
| } |