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Undeprecate injector API to allow change summary

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Bug: 120236748
Test: build, flash, and test manually
Change-Id: I96042f51ce3fe32d15596b026f802f89dabf8405
This commit is contained in:
Lifu Tang
2018-12-06 18:00:03 -08:00
parent 1982ca78e3
commit 78e0756ece
4 changed files with 112 additions and 93 deletions
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3
api/current.txt
View File

@@ -22823,9 +22823,10 @@ package android.location {
ctor public SettingInjectorService(java.lang.String);
method public final android.os.IBinder onBind(android.content.Intent);
method protected abstract boolean onGetEnabled();
method protected abstract deprecated java.lang.String onGetSummary();
method protected abstract java.lang.String onGetSummary();
method public final void onStart(android.content.Intent, int);
method public final int onStartCommand(android.content.Intent, int, int);
method public static final void refreshSettings(android.content.Context);
field public static final java.lang.String ACTION_INJECTED_SETTING_CHANGED = "android.location.InjectedSettingChanged";
field public static final java.lang.String ACTION_SERVICE_INTENT = "android.location.SettingInjectorService";
field public static final java.lang.String ATTRIBUTES_NAME = "injected-location-setting";

67
location/java/android/location/SettingInjectorService.java
View File

@@ -17,6 +17,7 @@
package android.location;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
@@ -26,7 +27,7 @@ import android.os.RemoteException;
import android.util.Log;
/**
* Dynamically specifies the enabled status of a preference injected into
* Dynamically specifies the summary (subtitle) and enabled status of a preference injected into
* the list of app settings displayed by the system settings app
* <p/>
* For use only by apps that are included in the system image, for preferences that affect multiple
@@ -71,12 +72,13 @@ import android.util.Log;
* </ul>
*
* To ensure a good user experience, your {@link android.app.Application#onCreate()},
* and {@link #onGetEnabled()} methods must all be fast. If either is slow,
* it can delay the display of settings values for other apps as well. Note further that these
* methods are called on your app's UI thread.
* {@link #onGetSummary()}, and {@link #onGetEnabled()} methods must all be fast. If any are slow,
* it can delay the display of settings values for other apps as well. Note further that all are
* called on your app's UI thread.
* <p/>
* For compactness, only one copy of a given setting should be injected. If each account has a
* distinct value for the setting, then only {@code settingsActivity} should display the value for
* distinct value for the setting, then the {@link #onGetSummary()} value should represent a summary
* of the state across all of the accounts and {@code settingsActivity} should display the value for
* each account.
*/
public abstract class SettingInjectorService extends Service {
@@ -107,6 +109,14 @@ public abstract class SettingInjectorService extends Service {
public static final String ACTION_INJECTED_SETTING_CHANGED =
"android.location.InjectedSettingChanged";
/**
* Name of the bundle key for the string specifying the summary for the setting (e.g., "ON" or
* "OFF").
*
* @hide
*/
public static final String SUMMARY_KEY = "summary";
/**
* Name of the bundle key for the string specifying whether the setting is currently enabled.
*
@@ -150,36 +160,41 @@ public abstract class SettingInjectorService extends Service {
}
private void onHandleIntent(Intent intent) {
boolean enabled;
String summary = null;
boolean enabled = false;
try {
summary = onGetSummary();
enabled = onGetEnabled();
} catch (RuntimeException e) {
// Exception. Send status anyway, so that settings injector can immediately start
// loading the status of the next setting.
sendStatus(intent, true);
throw e;
} finally {
// If exception happens, send status anyway, so that settings injector can immediately
// start loading the status of the next setting. But leave the exception uncaught to
// crash the injector service itself.
sendStatus(intent, summary, enabled);
}
sendStatus(intent, enabled);
}
/**
* Send the enabled values back to the caller via the messenger encoded in the
* intent.
*/
private void sendStatus(Intent intent, boolean enabled) {
private void sendStatus(Intent intent, String summary, boolean enabled) {
Messenger messenger = intent.getParcelableExtra(MESSENGER_KEY);
// Bail out to avoid crashing GmsCore with incoming malicious Intent.
if (messenger == null) {
return;
}
Message message = Message.obtain();
Bundle bundle = new Bundle();
bundle.putString(SUMMARY_KEY, summary);
bundle.putBoolean(ENABLED_KEY, enabled);
message.setData(bundle);
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, mName + ": received " + intent
Log.d(TAG, mName + ": received " + intent + ", summary=" + summary
+ ", enabled=" + enabled + ", sending message: " + message);
}
Messenger messenger = intent.getParcelableExtra(MESSENGER_KEY);
try {
messenger.send(message);
} catch (RemoteException e) {
@@ -188,14 +203,12 @@ public abstract class SettingInjectorService extends Service {
}
/**
* This method is no longer called, because status values are no longer shown for any injected
* setting.
* Returns the {@link android.preference.Preference#getSummary()} value (allowed to be null or
* empty). Should not perform unpredictably-long operations such as network access--see the
* running-time comments in the class-level javadoc.
*
* @return ignored
*
* @deprecated not called any more
* @return the {@link android.preference.Preference#getSummary()} value
*/
@Deprecated
protected abstract String onGetSummary();
/**
@@ -217,4 +230,12 @@ public abstract class SettingInjectorService extends Service {
* @return the {@link android.preference.Preference#isEnabled()} value
*/
protected abstract boolean onGetEnabled();
/**
* Sends a broadcast to refresh the injected settings on location settings page.
*/
public static final void refreshSettings(Context context) {
Intent intent = new Intent(ACTION_INJECTED_SETTING_CHANGED);
context.sendBroadcast(intent);
}
}

4
packages/SettingsLib/res/values/strings.xml
View File

@@ -831,6 +831,10 @@
<!-- Toast message shown when setting a new local backup password fails due to the user not supplying the correct existing password. The phrasing here is deliberately quite general. [CHAR LIMIT=80] -->
<string name="local_backup_password_toast_validation_failure">Failure setting backup password</string>
<!-- [CHAR LIMIT=30] Location mode screen, temporary summary text to show as the status of a location
setting injected by an external app while the app is being queried for the actual value -->
<string name="loading_injected_setting_summary">Loading\u2026</string>
<!-- Name of each color mode for the display. [CHAR LIMIT=40] -->
<string-array name="color_mode_names">
<item>Vibrant (default)</item>

131
packages/SettingsLib/src/com/android/settingslib/location/SettingsInjector.java
View File

@@ -37,6 +37,7 @@ import android.os.Messenger;
import android.os.SystemClock;
import android.os.UserHandle;
import android.os.UserManager;
import android.util.ArraySet;
import android.util.AttributeSet;
import android.util.IconDrawableFactory;
import android.util.Log;
@@ -44,11 +45,16 @@ import android.util.Xml;
import androidx.preference.Preference;
import com.android.settingslib.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Deque;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
@@ -102,7 +108,7 @@ public class SettingsInjector {
public SettingsInjector(Context context) {
mContext = context;
mSettings = new HashSet<Setting>();
mHandler = new StatusLoadingHandler();
mHandler = new StatusLoadingHandler(mSettings);
}
/**
@@ -165,7 +171,7 @@ public class SettingsInjector {
Log.e(TAG, "Can't get ApplicationInfo for " + setting.packageName, e);
}
preference.setTitle(setting.title);
preference.setSummary(null);
preference.setSummary(R.string.loading_injected_setting_summary);
preference.setIcon(appIcon);
preference.setOnPreferenceClickListener(new ServiceSettingClickedListener(setting));
}
@@ -180,6 +186,7 @@ public class SettingsInjector {
final UserManager um = (UserManager) mContext.getSystemService(Context.USER_SERVICE);
final List<UserHandle> profiles = um.getUserProfiles();
ArrayList<Preference> prefs = new ArrayList<>();
mSettings.clear();
for (UserHandle userHandle : profiles) {
if (profileId == UserHandle.USER_CURRENT || profileId == userHandle.getIdentifier()) {
Iterable<InjectedSetting> settings = getSettings(userHandle);
@@ -363,31 +370,28 @@ public class SettingsInjector {
* SettingInjectorService}, so to reduce memory pressure we don't want to load too many at
* once.
*/
private final class StatusLoadingHandler extends Handler {
private static final class StatusLoadingHandler extends Handler {
/**
* References all the injected settings.
*/
WeakReference<Set<Setting>> mAllSettings;
/**
* Settings whose status values need to be loaded. A set is used to prevent redundant loads.
*/
private Set<Setting> mSettingsToLoad = new HashSet<Setting>();
private Deque<Setting> mSettingsToLoad = new ArrayDeque<Setting>();
/**
* Settings that are being loaded now and haven't timed out. In practice this should have
* zero or one elements.
*/
private Set<Setting> mSettingsBeingLoaded = new HashSet<Setting>();
private Set<Setting> mSettingsBeingLoaded = new ArraySet<Setting>();
/**
* Settings that are being loaded but have timed out. If only one setting has timed out, we
* will go ahead and start loading the next setting so that one slow load won't delay the
* load of the other settings.
*/
private Set<Setting> mTimedOutSettings = new HashSet<Setting>();
private boolean mReloadRequested;
private StatusLoadingHandler() {
public StatusLoadingHandler(Set<Setting> allSettings) {
super(Looper.getMainLooper());
mAllSettings = new WeakReference<>(allSettings);
}
@Override
public void handleMessage(Message msg) {
if (Log.isLoggable(TAG, Log.DEBUG)) {
@@ -396,20 +400,24 @@ public class SettingsInjector {
// Update state in response to message
switch (msg.what) {
case WHAT_RELOAD:
mReloadRequested = true;
case WHAT_RELOAD: {
final Set<Setting> allSettings = mAllSettings.get();
if (allSettings != null) {
// Reload requested, so must reload all settings
mSettingsToLoad.clear();
mSettingsToLoad.addAll(allSettings);
}
break;
}
case WHAT_RECEIVED_STATUS:
final Setting receivedSetting = (Setting) msg.obj;
receivedSetting.maybeLogElapsedTime();
mSettingsBeingLoaded.remove(receivedSetting);
mTimedOutSettings.remove(receivedSetting);
removeMessages(WHAT_TIMEOUT, receivedSetting);
break;
case WHAT_TIMEOUT:
final Setting timedOutSetting = (Setting) msg.obj;
mSettingsBeingLoaded.remove(timedOutSetting);
mTimedOutSettings.add(timedOutSetting);
if (Log.isLoggable(TAG, Log.WARN)) {
Log.w(TAG, "Timed out after " + timedOutSetting.getElapsedTime()
+ " millis trying to get status for: " + timedOutSetting);
@@ -421,37 +429,22 @@ public class SettingsInjector {
// Decide whether to load additional settings based on the new state. Start by seeing
// if we have headroom to load another setting.
if (mSettingsBeingLoaded.size() > 0 || mTimedOutSettings.size() > 1) {
if (mSettingsBeingLoaded.size() > 0) {
// Don't load any more settings until one of the pending settings has completed.
// To reduce memory pressure, we want to be loading at most one setting (plus at
// most one timed-out setting) at a time. This means we'll be responsible for
// bringing in at most two services.
// To reduce memory pressure, we want to be loading at most one setting.
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, "too many services already live for " + msg + ", " + this);
}
return;
}
if (mReloadRequested && mSettingsToLoad.isEmpty() && mSettingsBeingLoaded.isEmpty()
&& mTimedOutSettings.isEmpty()) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, "reloading because idle and reload requesteed " + msg + ", " + this);
}
// Reload requested, so must reload all settings
mSettingsToLoad.addAll(mSettings);
mReloadRequested = false;
}
// Remove the next setting to load from the queue, if any
Iterator<Setting> iter = mSettingsToLoad.iterator();
if (!iter.hasNext()) {
if (mSettingsToLoad.isEmpty()) {
if (Log.isLoggable(TAG, Log.VERBOSE)) {
Log.v(TAG, "nothing left to do for " + msg + ", " + this);
}
return;
}
Setting setting = iter.next();
iter.remove();
Setting setting = mSettingsToLoad.removeFirst();
// Request the status value
setting.startService();
@@ -473,21 +466,48 @@ public class SettingsInjector {
return "StatusLoadingHandler{" +
"mSettingsToLoad=" + mSettingsToLoad +
", mSettingsBeingLoaded=" + mSettingsBeingLoaded +
", mTimedOutSettings=" + mTimedOutSettings +
", mReloadRequested=" + mReloadRequested +
'}';
}
}
private static class MessengerHandler extends Handler {
private WeakReference<Setting> mSettingRef;
private Handler mHandler;
public MessengerHandler(Setting setting, Handler handler) {
mSettingRef = new WeakReference(setting);
mHandler = handler;
}
@Override
public void handleMessage(Message msg) {
final Setting setting = mSettingRef.get();
if (setting == null) {
return;
}
final Preference preference = setting.preference;
Bundle bundle = msg.getData();
boolean enabled = bundle.getBoolean(SettingInjectorService.ENABLED_KEY, true);
String summary = bundle.getString(SettingInjectorService.SUMMARY_KEY, null);
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, setting + ": received " + msg + ", bundle: " + bundle);
}
preference.setSummary(summary);
preference.setEnabled(enabled);
mHandler.sendMessage(
mHandler.obtainMessage(WHAT_RECEIVED_STATUS, setting));
}
}
/**
* Represents an injected setting and the corresponding preference.
*/
protected final class Setting {
public final InjectedSetting setting;
public final Preference preference;
public long startMillis;
public Setting(InjectedSetting setting, Preference preference) {
this.setting = setting;
this.preference = preference;
@@ -501,20 +521,6 @@ public class SettingsInjector {
'}';
}
/**
* Returns true if they both have the same {@link #setting} value. Ignores mutable
* {@link #preference} and {@link #startMillis} so that it's safe to use in sets.
*/
@Override
public boolean equals(Object o) {
return this == o || o instanceof Setting && setting.equals(((Setting) o).setting);
}
@Override
public int hashCode() {
return setting.hashCode();
}
/**
* Starts the service to fetch for the current status for the setting, and updates the
* preference when the service replies.
@@ -529,20 +535,7 @@ public class SettingsInjector {
}
return;
}
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
Bundle bundle = msg.getData();
boolean enabled = bundle.getBoolean(SettingInjectorService.ENABLED_KEY, true);
if (Log.isLoggable(TAG, Log.DEBUG)) {
Log.d(TAG, setting + ": received " + msg + ", bundle: " + bundle);
}
preference.setSummary(null);
preference.setEnabled(enabled);
mHandler.sendMessage(
mHandler.obtainMessage(WHAT_RECEIVED_STATUS, Setting.this));
}
};
Handler handler = new MessengerHandler(this, mHandler);
Messenger messenger = new Messenger(handler);
Intent intent = setting.getServiceIntent();