If installer killed after commit continue onCreate (a35df07e) · Commits · e / os / android_packages_apps_PackageInstaller

AndroidManifest.xml

+10 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		<uses-permission android:name="android.permission.WAKE_LOCK" />
		<uses-permission android:name="android.permission.KILL_UID" />
		<uses-permission android:name="android.permission.MANAGE_APP_OPS_RESTRICTIONS" />
		<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

		<uses-permission android:name="com.google.android.permission.INSTALL_WEARABLE_PACKAGES" />

		@@ -63,6 +64,15 @@
		android:theme="@style/DialogWhenLargeNoAnimation"
		android:exported="false" />

		<receiver android:name=".InstallEventReceiver"
		android:permission="android.permission.INSTALL_PACKAGES"
		android:exported="true">
		<intent-filter>
		<action android:name="com.android.packageinstaller.ACTION_INSTALL_COMMIT" />
		<action android:name="android.intent.action.BOOT_COMPLETED" />
		</intent-filter>
		</receiver>

		<activity android:name=".InstallSuccess"
		android:theme="@style/DialogWhenLargeNoAnimation"
		android:exported="false" />

src/com/android/packageinstaller/EventResultPersister.java

0 → 100644

+315 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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.packageinstaller;

		import android.annotation.NonNull;
		import android.annotation.Nullable;
		import android.content.Context;
		import android.content.Intent;
		import android.content.pm.PackageInstaller;
		import android.os.AsyncTask;
		import android.util.AtomicFile;
		import android.util.Log;
		import android.util.SparseArray;
		import android.util.Xml;

		import com.android.internal.annotations.GuardedBy;
		import com.android.internal.util.FastXmlSerializer;
		import com.android.internal.util.XmlUtils;

		import org.xmlpull.v1.XmlPullParser;

		import java.io.File;
		import java.io.FileInputStream;
		import java.io.FileOutputStream;
		import java.io.IOException;
		import java.nio.charset.StandardCharsets;

		/**
		* Persists results of events and calls back observers when a matching result arrives.
		*/
		class EventResultPersister {
		private static final String LOG_TAG = EventResultPersister.class.getSimpleName();

		/** Id passed to {@link #addObserver(int, EventResultObserver)} to generate new id */
		static final int GENERATE_NEW_ID = Integer.MIN_VALUE;

		/**
		* The extra with the id to set in the intent delivered to
		* {@link #onEventReceived(Context, Intent)}
		*/
		static final String EXTRA_ID = "EventResultPersister.EXTRA_ID";

		/** Persisted state of this object */
		private final AtomicFile mResultsFile;

		private final Object mLock = new Object();

		/** Currently stored but not yet called back results (install id -> status, status message) */
		@GuardedBy("mLock")
		private final SparseArray<EventResult> mResults = new SparseArray<>();

		/** Currently registered, not called back observers (install id -> observer) */
		@GuardedBy("mLock")
		private final SparseArray<EventResultObserver> mObservers = new SparseArray<>();

		/** Always increasing counter for install event ids */
		@GuardedBy("mLock")
		private int mCounter;

		/** If a write that will persist the state is scheduled */
		@GuardedBy("mLock")
		private boolean mIsPersistScheduled;

		/** If the state was changed while the data was being persisted */
		@GuardedBy("mLock")
		private boolean mIsPersistingStateValid;

		/** Call back when a result is received. Observer is removed when onResult it called. */
		interface EventResultObserver {
		void onResult(int status, @Nullable String message);
		}

		/**
		* Read persisted state.
		*
		* @param resultFile The file the results are persisted in
		*/
		EventResultPersister(@NonNull File resultFile) {
		mResultsFile = new AtomicFile(resultFile);
		mCounter = GENERATE_NEW_ID + 1;

		try (FileInputStream stream = mResultsFile.openRead()) {
		XmlPullParser parser = Xml.newPullParser();
		parser.setInput(stream, StandardCharsets.UTF_8.name());

		XmlUtils.nextElement(parser);
		while (parser.getEventType() != XmlPullParser.END_DOCUMENT) {
		String tagName = parser.getName();
		if ("results".equals(tagName)) {
		mCounter = XmlUtils.readIntAttribute(parser, "counter",
		GENERATE_NEW_ID + 1);
		} else if ("result".equals(tagName)) {
		int id = XmlUtils.readIntAttribute(parser, "id", 0);
		int status = XmlUtils.readIntAttribute(parser, "status", 0);
		String statusMessage = XmlUtils.readStringAttribute(parser, "statusMessage");

		if (mResults.get(id) != null) {
		throw new Exception("id " + id + " has two results");
		}

		mResults.put(id, new EventResult(status, statusMessage));
		} else {
		throw new Exception("unexpected tag");
		}

		XmlUtils.nextElement(parser);
		}
		} catch (Exception e) {
		mResults.clear();
		writeState();
		}
		}

		/**
		* Add a result. If the result is an pending user action, execute the pending user action
		* directly and do not queue a result.
		*
		* @param context The context the event was received in
		* @param intent The intent the activity received
		*/
		void onEventReceived(@NonNull Context context, @NonNull Intent intent) {
		int status = intent.getIntExtra(PackageInstaller.EXTRA_STATUS, 0);

		if (status == PackageInstaller.STATUS_PENDING_USER_ACTION) {
		context.startActivity(intent.getParcelableExtra(Intent.EXTRA_INTENT));

		return;
		}

		int id = intent.getIntExtra(EXTRA_ID, 0);
		String statusMessage = intent.getStringExtra(PackageInstaller.EXTRA_STATUS_MESSAGE);

		EventResultObserver observerToCall = null;
		synchronized (mLock) {
		int numObservers = mObservers.size();
		for (int i = 0; i < numObservers; i++) {
		if (mObservers.keyAt(i) == id) {
		observerToCall = mObservers.valueAt(i);
		mObservers.removeAt(i);

		break;
		}
		}

		if (observerToCall != null) {
		observerToCall.onResult(status, statusMessage);
		} else {
		mResults.put(id, new EventResult(status, statusMessage));
		writeState();
		}
		}
		}

		/**
		* Persist current state. The persistence might be delayed.
		*/
		private void writeState() {
		synchronized (mLock) {
		mIsPersistingStateValid = false;

		if (!mIsPersistScheduled) {
		mIsPersistScheduled = true;

		AsyncTask.execute(() -> {
		int counter;
		SparseArray<EventResult> results;

		while (true) {
		// Take snapshot of state
		synchronized (mLock) {
		counter = mCounter;
		results = mResults.clone();
		mIsPersistingStateValid = true;
		}

		FileOutputStream stream = null;
		try {
		stream = mResultsFile.startWrite();
		FastXmlSerializer serializer = new FastXmlSerializer();
		serializer.setOutput(stream, StandardCharsets.UTF_8.name());
		serializer.startDocument(null, true);
		serializer.setFeature(
		"http://xmlpull.org/v1/doc/features.html#indent-output", true);
		serializer.startTag(null, "results");
		serializer.attribute(null, "counter", Integer.toString(counter));

		int numResults = results.size();
		for (int i = 0; i < numResults; i++) {
		serializer.startTag(null, "result");
		serializer.attribute(null, "id",
		Integer.toString(results.keyAt(i)));
		serializer.attribute(null, "status",
		Integer.toString(results.valueAt(i).status));
		if (results.valueAt(i).message != null) {
		serializer.attribute(null, "statusMessage",
		results.valueAt(i).message);
		}
		serializer.endTag(null, "result");
		}

		serializer.endTag(null, "results");
		serializer.endDocument();

		mResultsFile.finishWrite(stream);
		} catch (IOException e) {
		if (stream != null) {
		mResultsFile.failWrite(stream);
		}

		Log.e(LOG_TAG, "error writing results", e);
		mResultsFile.delete();
		}

		// Check if there was changed state since we persisted. If so, we need to
		// persist again.
		synchronized (mLock) {
		if (mIsPersistingStateValid) {
		mIsPersistScheduled = false;
		break;
		}
		}
		}
		});
		}
		}
		}

		/**
		* Add an observer. If there is already an event for this id, call back inside of this call.
		*
		* @param id The id the observer is for or {@code GENERATE_NEW_ID} to generate a new one.
		* @param observer The observer to call back.
		*
		* @return The id for this event
		*/
		int addObserver(int id, @NonNull EventResultObserver observer)
		throws OutOfIdsException {
		boolean stateChanged = false;

		synchronized (mLock) {
		int resultIndex = 0;
		EventResult result = null;

		if (id == GENERATE_NEW_ID) {
		if (mCounter == Integer.MAX_VALUE) {
		throw new OutOfIdsException();
		} else {
		id = mCounter;
		mCounter++;

		stateChanged = true;
		}
		} else {
		resultIndex = mResults.indexOfKey(id);
		result = mResults.valueAt(resultIndex);
		}

		// Check if we can instantly call back
		if (result != null) {
		observer.onResult(result.status, result.message);
		mResults.removeAt(resultIndex);
		stateChanged = true;
		} else {
		mObservers.put(id, observer);
		}

		if (stateChanged) {
		writeState();
		}
		}


		return id;
		}

		/**
		* Remove a observer.
		*
		* @param id The id the observer was added for
		*/
		void removeObserver(int id) {
		synchronized (mLock) {
		mObservers.delete(id);
		}
		}

		/**
		* The status from an event.
		*/
		private class EventResult {
		public final int status;
		@Nullable public final String message;

		private EventResult(int status, @Nullable String message) {
		this.status = status;
		this.message = message;
		}
		}

		class OutOfIdsException extends Exception {}
		}

src/com/android/packageinstaller/InstallEventReceiver.java

0 → 100644

+85 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 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.packageinstaller;

		import android.annotation.NonNull;
		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.Intent;

		import java.io.File;

		/**
		* Receives install events and perists them using a {@link EventResultPersister}.
		*/
		public class InstallEventReceiver extends BroadcastReceiver {
		private static final Object sLock = new Object();
		private static EventResultPersister sReceiver;

		/**
		* Get the event receiver persisting the results
		*
		* @return The event receiver.
		*/
		@NonNull private static EventResultPersister getReceiver(@NonNull Context context) {
		synchronized (sLock) {
		if (sReceiver == null) {
		sReceiver = new EventResultPersister(new File(context.getNoBackupFilesDir(),
		"install_results.xml"));
		}
		}

		return sReceiver;
		}

		@Override
		public void onReceive(Context context, Intent intent) {
		if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
		// Do not persist installs over reboot
		synchronized (sLock) {
		new File(context.getNoBackupFilesDir(), "install_results.xml").delete();
		}
		} else {
		getReceiver(context).onEventReceived(context, intent);
		}
		}

		/**
		* Add an observer. If there is already an event for this id, call back inside of this call.
		*
		* @param context A context of the current app
		* @param id The id the observer is for or {@code GENERATE_NEW_ID} to generate a new one.
		* @param observer The observer to call back.
		*
		* @return The id for this event
		*/
		static int addObserver(@NonNull Context context, int id,
		@NonNull EventResultPersister.EventResultObserver observer)
		throws EventResultPersister.OutOfIdsException {
		return getReceiver(context).addObserver(id, observer);
		}

		/**
		* Remove a observer.
		*
		* @param context A context of the current app
		* @param id The id the observer was added for
		*/
		static void removeObserver(@NonNull Context context, int id) {
		getReceiver(context).removeObserver(id);
		}
		}

src/com/android/packageinstaller/InstallInstalling.java

+48 −59

Original line number	Diff line number	Diff line
		@@ -21,10 +21,7 @@ import static android.content.pm.PackageInstaller.SessionParams.UID_UNKNOWN;
		import android.annotation.Nullable;
		import android.app.Activity;
		import android.app.PendingIntent;
		import android.content.BroadcastReceiver;
		import android.content.Context;
		import android.content.Intent;
		import android.content.IntentFilter;
		import android.content.pm.ApplicationInfo;
		import android.content.pm.PackageInstaller;
		import android.content.pm.PackageManager;
		@@ -54,16 +51,11 @@ public class InstallInstalling extends Activity {
		private static final String LOG_TAG = InstallInstalling.class.getSimpleName();

		private static final String SESSION_ID = "com.android.packageinstaller.SESSION_ID";
		private static final String INSTALL_ID = "com.android.packageinstaller.INSTALL_ID";

		private static final String BROADCAST_ACTION =
		"com.android.packageinstaller.ACTION_INSTALL_COMMIT";

		private static final String BROADCAST_SENDER_PERMISSION =
		"android.permission.INSTALL_PACKAGES";

		/** Receiver receiving the results of the installation */
		private BroadcastReceiver mBroadcastReceiver;

		/** Listens to changed to the session and updates progress bar */
		private PackageInstaller.SessionCallback mSessionCallback;

		@@ -73,12 +65,12 @@ public class InstallInstalling extends Activity {
		/** Id of the session to install the package */
		private int mSessionId;

		/** Id of the install event we wait for */
		private int mInstallId;

		/** URI of package to install */
		private Uri mPackageURI;

		/** Info about the app to info */
		private ApplicationInfo mAppInfo;

		/** The button that can cancel this dialog */
		private Button mCancelButton;

		@@ -88,23 +80,34 @@ public class InstallInstalling extends Activity {

		setContentView(R.layout.install_installing);

		mAppInfo = getIntent().getParcelableExtra(PackageUtil.INTENT_ATTR_APPLICATION_INFO);
		ApplicationInfo appInfo = getIntent()
		.getParcelableExtra(PackageUtil.INTENT_ATTR_APPLICATION_INFO);
		mPackageURI = getIntent().getData();

		if ("package".equals(mPackageURI.getScheme())) {
		try {
		getPackageManager().installExistingPackage(mAppInfo.packageName);
		getPackageManager().installExistingPackage(appInfo.packageName);
		launchSuccess();
		} catch (PackageManager.NameNotFoundException e) {
		launchFailure(PackageInstaller.STATUS_FAILURE_INVALID, null);
		}
		} else {
		final File sourceFile = new File(mPackageURI.getPath());
		PackageUtil.initSnippetForNewApp(this, PackageUtil.getAppSnippet(this, mAppInfo,
		PackageUtil.initSnippetForNewApp(this, PackageUtil.getAppSnippet(this, appInfo,
		sourceFile), R.id.app_snippet);

		if (savedInstanceState != null) {
		mSessionId = savedInstanceState.getInt(SESSION_ID);
		mInstallId = savedInstanceState.getInt(INSTALL_ID);

		// Reregister for result; might instantly call back if result was delivered while
		// activity was destroyed
		try {
		InstallEventReceiver.addObserver(this, mInstallId,
		this::launchFinishBasedOnResult);
		} catch (EventResultPersister.OutOfIdsException e) {
		// Does not happen
		}
		} else {
		PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(
		PackageInstaller.SessionParams.MODE_FULL_INSTALL);
		@@ -132,6 +135,14 @@ public class InstallInstalling extends Activity {
		params.setSize(file.length());
		}

		try {
		mInstallId = InstallEventReceiver
		.addObserver(this, EventResultPersister.GENERATE_NEW_ID,
		this::launchFinishBasedOnResult);
		} catch (EventResultPersister.OutOfIdsException e) {
		launchFailure(PackageInstaller.STATUS_FAILURE, null);
		}

		try {
		mSessionId = getPackageManager().getPackageInstaller().createSession(params);
		} catch (IOException e) {
		@@ -155,12 +166,6 @@ public class InstallInstalling extends Activity {
		finish();
		});

		IntentFilter intentFilter = new IntentFilter();
		intentFilter.addAction(BROADCAST_ACTION);
		mBroadcastReceiver = new InstallResultReceiver();
		registerReceiver(mBroadcastReceiver, intentFilter, BROADCAST_SENDER_PERMISSION,
		null);

		mSessionCallback = new InstallSessionCallback();
		}
		}
		@@ -183,11 +188,6 @@ public class InstallInstalling extends Activity {
		* @param statusCode The status code explaining what went wrong
		*/
		private void launchFailure(int statusCode, String statusMessage) {
		if (mSessionId > 0) {
		getPackageManager().getPackageInstaller().abandonSession(mSessionId);
		mSessionId = 0;
		}

		Intent failureIntent = new Intent(getIntent());
		failureIntent.setClass(this, InstallFailed.class);
		failureIntent.addFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
		@@ -229,6 +229,7 @@ public class InstallInstalling extends Activity {
		super.onSaveInstanceState(outState);

		outState.putInt(SESSION_ID, mSessionId);
		outState.putInt(INSTALL_ID, mInstallId);
		}

		@Override
		@@ -254,36 +255,22 @@ public class InstallInstalling extends Activity {
		}
		}

		if (mBroadcastReceiver != null) {
		unregisterReceiver(mBroadcastReceiver);
		}
		InstallEventReceiver.removeObserver(this, mInstallId);

		super.onDestroy();
		}

		/**
		* Receive results from the package installer after InstallingAsyncTask finished.
		* Launch the appropriate finish activity (success or failed) for the installation result.
		*
		* @param statusCode The installation result.
		* @param statusMessage The detailed installation result.
		*/
		private final class InstallResultReceiver extends BroadcastReceiver {
		@Override
		public void onReceive(Context context, Intent intent) {
		if (intent.getIntExtra(SESSION_ID, 0) != mSessionId) {
		return;
		}

		final int statusCode = intent.getIntExtra(
		PackageInstaller.EXTRA_STATUS, PackageInstaller.STATUS_FAILURE);
		if (statusCode == PackageInstaller.STATUS_PENDING_USER_ACTION) {
		context.startActivity(intent.getParcelableExtra(Intent.EXTRA_INTENT));
		} else {
		private void launchFinishBasedOnResult(int statusCode, String statusMessage) {
		if (statusCode == PackageInstaller.STATUS_SUCCESS) {
		launchSuccess();
		} else {
		mSessionId = 0;
		launchFailure(statusCode, intent.getStringExtra(
		PackageInstaller.EXTRA_STATUS_MESSAGE));
		}
		}
		launchFailure(statusCode, statusMessage);
		}
		}

		@@ -320,8 +307,8 @@ public class InstallInstalling extends Activity {
		}

		/**
		* Send the package to the package installer and then register a broadcast pending intent that
		* will wake up {@link InstallResultReceiver}
		* Send the package to the package installer and then register a event result observer that
		* will call {@link #launchFinishBasedOnResult(int, String)}
		*/
		private final class InstallingAsyncTask extends AsyncTask<Void, Void,
		PackageInstaller.Session> {
		@@ -368,17 +355,18 @@ public class InstallInstalling extends Activity {
		}
		}

		synchronized (this) {
		isDone = true;
		notifyAll();
		}

		return session;
		} catch (IOException e) {
		Log.e(LOG_TAG, "Could not write package", e);

		session.close();

		return null;
		} finally {
		synchronized (this) {
		isDone = true;
		notifyAll();
		}
		}
		}

		@@ -386,17 +374,18 @@ public class InstallInstalling extends Activity {
		protected void onPostExecute(PackageInstaller.Session session) {
		if (session != null) {
		Intent broadcastIntent = new Intent(BROADCAST_ACTION);
		broadcastIntent.putExtra(SESSION_ID, mSessionId);
		broadcastIntent.putExtra(EventResultPersister.EXTRA_ID, mInstallId);

		PendingIntent pendingIntent = PendingIntent.getBroadcast(
		InstallInstalling.this,
		mSessionId,
		mInstallId,
		broadcastIntent,
		PendingIntent.FLAG_UPDATE_CURRENT);

		session.commit(pendingIntent.getIntentSender());
		mCancelButton.setEnabled(false);
		} else {
		getPackageManager().getPackageInstaller().abandonSession(mSessionId);
		launchFailure(PackageInstaller.STATUS_FAILURE, null);
		}
		}