1package com.android.settingslib;
2
3import android.annotation.ColorInt;
4import android.content.Context;
5import android.content.Intent;
6import android.content.pm.PackageInfo;
7import android.content.pm.PackageManager;
8import android.content.pm.PackageManager.NameNotFoundException;
9import android.content.pm.UserInfo;
10import android.content.pm.Signature;
11import android.content.res.Resources;
12import android.content.res.TypedArray;
13import android.graphics.Bitmap;
14import android.graphics.BitmapFactory;
15import android.graphics.drawable.Drawable;
16import android.net.ConnectivityManager;
17import android.os.BatteryManager;
18import android.os.UserManager;
19import android.print.PrintManager;
20import com.android.internal.util.UserIcons;
21import com.android.settingslib.drawable.UserIconDrawable;
22
23import java.text.NumberFormat;
24
25public class Utils {
26    private static Signature[] sSystemSignature;
27    private static String sPermissionControllerPackageName;
28    private static String sServicesSystemSharedLibPackageName;
29    private static String sSharedSystemSharedLibPackageName;
30
31    /**
32     * Return string resource that best describes combination of tethering
33     * options available on this device.
34     */
35    public static int getTetheringLabel(ConnectivityManager cm) {
36        String[] usbRegexs = cm.getTetherableUsbRegexs();
37        String[] wifiRegexs = cm.getTetherableWifiRegexs();
38        String[] bluetoothRegexs = cm.getTetherableBluetoothRegexs();
39
40        boolean usbAvailable = usbRegexs.length != 0;
41        boolean wifiAvailable = wifiRegexs.length != 0;
42        boolean bluetoothAvailable = bluetoothRegexs.length != 0;
43
44        if (wifiAvailable && usbAvailable && bluetoothAvailable) {
45            return R.string.tether_settings_title_all;
46        } else if (wifiAvailable && usbAvailable) {
47            return R.string.tether_settings_title_all;
48        } else if (wifiAvailable && bluetoothAvailable) {
49            return R.string.tether_settings_title_all;
50        } else if (wifiAvailable) {
51            return R.string.tether_settings_title_wifi;
52        } else if (usbAvailable && bluetoothAvailable) {
53            return R.string.tether_settings_title_usb_bluetooth;
54        } else if (usbAvailable) {
55            return R.string.tether_settings_title_usb;
56        } else {
57            return R.string.tether_settings_title_bluetooth;
58        }
59    }
60
61    /**
62     * Returns a label for the user, in the form of "User: user name" or "Work profile".
63     */
64    public static String getUserLabel(Context context, UserInfo info) {
65        String name = info != null ? info.name : null;
66        if (info.isManagedProfile()) {
67            // We use predefined values for managed profiles
68            return context.getString(R.string.managed_user_title);
69        } else if (info.isGuest()) {
70            name = context.getString(R.string.user_guest);
71        }
72        if (name == null && info != null) {
73            name = Integer.toString(info.id);
74        } else if (info == null) {
75            name = context.getString(R.string.unknown);
76        }
77        return context.getResources().getString(R.string.running_process_item_user_label, name);
78    }
79
80    /**
81     * Returns a circular icon for a user.
82     */
83    public static UserIconDrawable getUserIcon(Context context, UserManager um, UserInfo user) {
84        final int iconSize = UserIconDrawable.getSizeForList(context);
85        if (user.isManagedProfile()) {
86            // We use predefined values for managed profiles
87            Bitmap b = BitmapFactory.decodeResource(context.getResources(),
88                    com.android.internal.R.drawable.ic_corp_icon);
89            return new UserIconDrawable(iconSize).setIcon(b).bake();
90        }
91        if (user.iconPath != null) {
92            Bitmap icon = um.getUserIcon(user.id);
93            if (icon != null) {
94                return new UserIconDrawable(iconSize).setIcon(icon).bake();
95            }
96        }
97        return new UserIconDrawable(iconSize).setIconDrawable(
98                UserIcons.getDefaultUserIcon(user.id, /* light= */ false)).bake();
99    }
100
101    /** Formats the ratio of amount/total as a percentage. */
102    public static String formatPercentage(long amount, long total) {
103        return formatPercentage(((double) amount) / total);
104    }
105
106    /** Formats an integer from 0..100 as a percentage. */
107    public static String formatPercentage(int percentage) {
108        return formatPercentage(((double) percentage) / 100.0);
109    }
110
111    /** Formats a double from 0.0..1.0 as a percentage. */
112    private static String formatPercentage(double percentage) {
113      return NumberFormat.getPercentInstance().format(percentage);
114    }
115
116    public static int getBatteryLevel(Intent batteryChangedIntent) {
117        int level = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_LEVEL, 0);
118        int scale = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_SCALE, 100);
119        return (level * 100) / scale;
120    }
121
122    public static String getBatteryStatus(Resources res, Intent batteryChangedIntent) {
123        return Utils.getBatteryStatus(res, batteryChangedIntent, false);
124    }
125
126    public static String getBatteryStatus(Resources res, Intent batteryChangedIntent,
127            boolean shortString) {
128        int plugType = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_PLUGGED, 0);
129        int status = batteryChangedIntent.getIntExtra(BatteryManager.EXTRA_STATUS,
130                BatteryManager.BATTERY_STATUS_UNKNOWN);
131        String statusString;
132        if (status == BatteryManager.BATTERY_STATUS_CHARGING) {
133            int resId;
134            if (plugType == BatteryManager.BATTERY_PLUGGED_AC) {
135                resId = shortString ? R.string.battery_info_status_charging_ac_short
136                        : R.string.battery_info_status_charging_ac;
137            } else if (plugType == BatteryManager.BATTERY_PLUGGED_USB) {
138                resId = shortString ? R.string.battery_info_status_charging_usb_short
139                        : R.string.battery_info_status_charging_usb;
140            } else if (plugType == BatteryManager.BATTERY_PLUGGED_WIRELESS) {
141                resId = shortString ? R.string.battery_info_status_charging_wireless_short
142                        : R.string.battery_info_status_charging_wireless;
143            } else {
144                resId = R.string.battery_info_status_charging;
145            }
146            statusString = res.getString(resId);
147        } else if (status == BatteryManager.BATTERY_STATUS_DISCHARGING) {
148            statusString = res.getString(R.string.battery_info_status_discharging);
149        } else if (status == BatteryManager.BATTERY_STATUS_NOT_CHARGING) {
150            statusString = res.getString(R.string.battery_info_status_not_charging);
151        } else if (status == BatteryManager.BATTERY_STATUS_FULL) {
152            statusString = res.getString(R.string.battery_info_status_full);
153        } else {
154            statusString = res.getString(R.string.battery_info_status_unknown);
155        }
156
157        return statusString;
158    }
159
160    @ColorInt
161    public static int getColorAccent(Context context) {
162        TypedArray ta = context.obtainStyledAttributes(new int[]{android.R.attr.colorAccent});
163        @ColorInt int colorAccent = ta.getColor(0, 0);
164        ta.recycle();
165        return colorAccent;
166    }
167
168    /**
169     * Determine whether a package is a "system package", in which case certain things (like
170     * disabling notifications or disabling the package altogether) should be disallowed.
171     */
172    public static boolean isSystemPackage(Resources resources, PackageManager pm, PackageInfo pkg) {
173        if (sSystemSignature == null) {
174            sSystemSignature = new Signature[]{ getSystemSignature(pm) };
175        }
176        if (sPermissionControllerPackageName == null) {
177            sPermissionControllerPackageName = pm.getPermissionControllerPackageName();
178        }
179        if (sServicesSystemSharedLibPackageName == null) {
180            sServicesSystemSharedLibPackageName = pm.getServicesSystemSharedLibraryPackageName();
181        }
182        if (sSharedSystemSharedLibPackageName == null) {
183            sSharedSystemSharedLibPackageName = pm.getSharedSystemSharedLibraryPackageName();
184        }
185        return (sSystemSignature[0] != null
186                        && sSystemSignature[0].equals(getFirstSignature(pkg)))
187                || pkg.packageName.equals(sPermissionControllerPackageName)
188                || pkg.packageName.equals(sServicesSystemSharedLibPackageName)
189                || pkg.packageName.equals(sSharedSystemSharedLibPackageName)
190                || pkg.packageName.equals(PrintManager.PRINT_SPOOLER_PACKAGE_NAME)
191                || isDeviceProvisioningPackage(resources, pkg.packageName);
192    }
193
194    private static Signature getFirstSignature(PackageInfo pkg) {
195        if (pkg != null && pkg.signatures != null && pkg.signatures.length > 0) {
196            return pkg.signatures[0];
197        }
198        return null;
199    }
200
201    private static Signature getSystemSignature(PackageManager pm) {
202        try {
203            final PackageInfo sys = pm.getPackageInfo("android", PackageManager.GET_SIGNATURES);
204            return getFirstSignature(sys);
205        } catch (NameNotFoundException e) {
206        }
207        return null;
208    }
209
210    /**
211     * Returns {@code true} if the supplied package is the device provisioning app. Otherwise,
212     * returns {@code false}.
213     */
214    public static boolean isDeviceProvisioningPackage(Resources resources, String packageName) {
215        String deviceProvisioningPackage = resources.getString(
216                com.android.internal.R.string.config_deviceProvisioningPackage);
217        return deviceProvisioningPackage != null && deviceProvisioningPackage.equals(packageName);
218    }
219}
220