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Commit 3fbdf467 authored by abdullahirum's avatar abdullahirum
Browse files

Implementing smart device config backup 

This CL makes sure that we only backup the device confugration when it is different from the currently backed up value

Flag: EXEMPT bug fix
Fix: 347959516
Test: manually verified
Change-Id: Ib326c5ba901cce8e8aea76c4c544d0baf6ab15eb
parent e00c7d22

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

+80 −36
Original line number Diff line number Diff line
@@ -120,6 +120,14 @@ public class WallpaperBackupAgent extends BackupAgent { 
    static final String SYSTEM_GENERATION = "system_gen";

    static final String LOCK_GENERATION = "lock_gen";



    static final String DEVICE_CONFIG_WIDTH = "device_config_width";



    static final String DEVICE_CONFIG_HEIGHT = "device_config_height";



    static final String DEVICE_CONFIG_SECONDARY_WIDTH = "device_config_secondary_width";



    static final String DEVICE_CONFIG_SECONDARY_HEIGHT = "device_config_secondary_height";



    static final float DEFAULT_ACCEPTABLE_PARALLAX = 0.2f;



    // If this file exists, it means we exceeded our quota last time
@@ -175,6 +183,16 @@ public class WallpaperBackupAgent extends BackupAgent { 
            // disk churn.

            final int lastSysGeneration = sharedPrefs.getInt(SYSTEM_GENERATION, /* defValue= */ -1);

            final int lastLockGeneration = sharedPrefs.getInt(LOCK_GENERATION, /* defValue= */ -1);



            final int deviceConfigWidth = sharedPrefs.getInt(

                    DEVICE_CONFIG_WIDTH, /* defValue= */ -1);

            final int deviceConfigHeight = sharedPrefs.getInt(

                    DEVICE_CONFIG_HEIGHT, /* defValue= */ -1);

            final int deviceConfigSecondaryWidth = sharedPrefs.getInt(

                    DEVICE_CONFIG_SECONDARY_WIDTH, /* defValue= */ -1);

            final int deviceConfigSecondaryHeight = sharedPrefs.getInt(

                    DEVICE_CONFIG_SECONDARY_HEIGHT, /* defValue= */ -1);



            final int sysGeneration = mWallpaperManager.getWallpaperId(FLAG_SYSTEM);

            final int lockGeneration = mWallpaperManager.getWallpaperId(FLAG_LOCK);

            final boolean sysChanged = (sysGeneration != lastSysGeneration);
@@ -195,7 +213,11 @@ public class WallpaperBackupAgent extends BackupAgent { 
            backupWallpaperInfoFile(/* sysOrLockChanged= */ sysChanged || lockChanged, data);

            backupSystemWallpaperFile(sharedPrefs, sysChanged, sysGeneration, data);

            backupLockWallpaperFileIfItExists(sharedPrefs, lockChanged, lockGeneration, data);

            backupDeviceInfoFile(data);



            final boolean isDeviceConfigChanged = isDeviceConfigChanged(deviceConfigWidth,

                    deviceConfigHeight, deviceConfigSecondaryWidth, deviceConfigSecondaryHeight);



            backupDeviceInfoFile(sharedPrefs, isDeviceConfigChanged, data);

        } catch (Exception e) {

            Slog.e(TAG, "Unable to back up wallpaper", e);

            mEventLogger.onBackupException(e);
@@ -209,14 +231,29 @@ public class WallpaperBackupAgent extends BackupAgent { 
        }

    }



    private boolean isDeviceConfigChanged(int width, int height, int secondaryWidth,

            int secondaryHeight) {

        Point currentDimensions = getScreenDimensions();

        Display smallerDisplay = getSmallerDisplayIfExists();

        Point currentSecondaryDimensions = smallerDisplay != null ? getRealSize(smallerDisplay) :

                new Point(0, 0);



        return (currentDimensions.x != width

                || currentDimensions.y != height

                || currentSecondaryDimensions.x != secondaryWidth

                || currentSecondaryDimensions.y != secondaryHeight);

    }



    /**

     * This method backs up the device dimension information. The device data will always get

     * overwritten when triggering a backup

     */

    private void backupDeviceInfoFile(FullBackupDataOutput data)

    private void backupDeviceInfoFile(SharedPreferences sharedPrefs, boolean isDeviceConfigChanged,

            FullBackupDataOutput data)

            throws IOException {

        final File deviceInfoStage = new File(getFilesDir(), WALLPAPER_BACKUP_DEVICE_INFO_STAGE);



        if (isDeviceConfigChanged) {

            // save the dimensions of the device with xml formatting

            Point dimensions = getScreenDimensions();

            Display smallerDisplay = getSmallerDisplayIfExists();
@@ -253,6 +290,13 @@ public class WallpaperBackupAgent extends BackupAgent { 
            FileUtils.sync(fstream);

            fstream.close();



            SharedPreferences.Editor editor = sharedPrefs.edit();

            editor.putInt(DEVICE_CONFIG_WIDTH, dimensions.x);

            editor.putInt(DEVICE_CONFIG_HEIGHT, dimensions.y);

            editor.putInt(DEVICE_CONFIG_SECONDARY_WIDTH, secondaryDimensions.x);

            editor.putInt(DEVICE_CONFIG_SECONDARY_HEIGHT, secondaryDimensions.y);

            editor.apply();

        }

        if (DEBUG) Slog.v(TAG, "Storing device dimension data");

        backupFile(deviceInfoStage, data);

    }