| /* |
| * 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 android.app.admin; |
| |
| import android.annotation.SdkConstant; |
| import android.annotation.SdkConstant.SdkConstantType; |
| import android.app.Service; |
| import android.content.BroadcastReceiver; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.Bundle; |
| |
| /** |
| * Base class for implementing a device administration component. This |
| * class provides a convenience for interpreting the raw intent actions |
| * that are sent by the system. |
| * |
| * <p>The callback methods, like the base |
| * {@link BroadcastReceiver#onReceive(Context, Intent) BroadcastReceiver.onReceive()} |
| * method, happen on the main thread of the process. Thus long running |
| * operations must be done on another thread. Note that because a receiver |
| * is done once returning from its receive function, such long-running operations |
| * should probably be done in a {@link Service}. |
| * |
| * <p>When publishing your DeviceAdmin subclass as a receiver, it must |
| * handle {@link #ACTION_DEVICE_ADMIN_ENABLED} and require the |
| * {@link android.Manifest.permission#BIND_DEVICE_ADMIN} permission. A typical |
| * manifest entry would look like:</p> |
| * |
| * {@sample development/samples/ApiDemos/AndroidManifest.xml device_admin_declaration} |
| * |
| * <p>The meta-data referenced here provides addition information specific |
| * to the device administrator, as parsed by the {@link DeviceAdminInfo} class. |
| * A typical file would be:</p> |
| * |
| * {@sample development/samples/ApiDemos/res/xml/device_admin_sample.xml meta_data} |
| */ |
| public class DeviceAdminReceiver extends BroadcastReceiver { |
| private static String TAG = "DevicePolicy"; |
| private static boolean DEBUG = false; |
| private static boolean localLOGV = DEBUG || android.util.Config.LOGV; |
| |
| /** |
| * This is the primary action that a device administrator must implement to be |
| * allowed to manage a device. This will be set to the receiver |
| * when the user enables it for administration. You will generally |
| * handle this in {@link DeviceAdminReceiver#onEnabled(Context, Intent)}. To be |
| * supported, the receiver must also require the |
| * {@link android.Manifest.permission#BIND_DEVICE_ADMIN} permission so |
| * that other applications can not abuse it. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_DEVICE_ADMIN_ENABLED |
| = "android.app.action.DEVICE_ADMIN_ENABLED"; |
| |
| /** |
| * Action sent to a device administrator when the user has requested to |
| * disable it, but before this has actually been done. This gives you |
| * a chance to supply a message to the user about the impact of |
| * disabling your admin, by setting the extra field |
| * {@link #EXTRA_DISABLE_WARNING} in the result Intent. If not set, |
| * no warning will be displayed. If set, the given text will be shown |
| * to the user before they disable your admin. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_DEVICE_ADMIN_DISABLE_REQUESTED |
| = "android.app.action.DEVICE_ADMIN_DISABLE_REQUESTED"; |
| |
| /** |
| * A CharSequence that can be shown to the user informing them of the |
| * impact of disabling your admin. |
| * |
| * @see #ACTION_DEVICE_ADMIN_DISABLE_REQUESTED |
| */ |
| public static final String EXTRA_DISABLE_WARNING = "android.app.extra.DISABLE_WARNING"; |
| |
| /** |
| * Action sent to a device administrator when the user has disabled |
| * it. Upon return, the application no longer has access to the |
| * protected device policy manager APIs. You will generally |
| * handle this in {@link DeviceAdminReceiver#onDisabled(Context, Intent)}. Note |
| * that this action will be |
| * sent the receiver regardless of whether it is explicitly listed in |
| * its intent filter. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_DEVICE_ADMIN_DISABLED |
| = "android.app.action.DEVICE_ADMIN_DISABLED"; |
| |
| /** |
| * Action sent to a device administrator when the user has changed the |
| * password of their device. You can at this point check the characteristics |
| * of the new password with {@link DevicePolicyManager#isActivePasswordSufficient() |
| * DevicePolicyManager.isActivePasswordSufficient()}. |
| * You will generally |
| * handle this in {@link DeviceAdminReceiver#onPasswordChanged}. |
| * |
| * <p>The calling device admin must have requested |
| * {@link DeviceAdminInfo#USES_POLICY_LIMIT_PASSWORD} to receive |
| * this broadcast. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PASSWORD_CHANGED |
| = "android.app.action.ACTION_PASSWORD_CHANGED"; |
| |
| /** |
| * Action sent to a device administrator when the user has failed at |
| * attempted to enter the password. You can at this point check the |
| * number of failed password attempts there have been with |
| * {@link DevicePolicyManager#getCurrentFailedPasswordAttempts |
| * DevicePolicyManager.getCurrentFailedPasswordAttempts()}. You will generally |
| * handle this in {@link DeviceAdminReceiver#onPasswordFailed}. |
| * |
| * <p>The calling device admin must have requested |
| * {@link DeviceAdminInfo#USES_POLICY_WATCH_LOGIN} to receive |
| * this broadcast. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PASSWORD_FAILED |
| = "android.app.action.ACTION_PASSWORD_FAILED"; |
| |
| /** |
| * Action sent to a device administrator when the user has successfully |
| * entered their password, after failing one or more times. |
| * |
| * <p>The calling device admin must have requested |
| * {@link DeviceAdminInfo#USES_POLICY_WATCH_LOGIN} to receive |
| * this broadcast. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PASSWORD_SUCCEEDED |
| = "android.app.action.ACTION_PASSWORD_SUCCEEDED"; |
| |
| /** |
| * Action periodically sent to a device administrator when the device password |
| * is expiring. |
| * |
| * <p>The calling device admin must have requested |
| * {@link DeviceAdminInfo#USES_POLICY_EXPIRE_PASSWORD} to receive |
| * this broadcast. |
| */ |
| @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) |
| public static final String ACTION_PASSWORD_EXPIRING |
| = "android.app.action.ACTION_PASSWORD_EXPIRING"; |
| |
| /** |
| * Name under which an DevicePolicy component publishes information |
| * about itself. This meta-data must reference an XML resource containing |
| * a device-admin tag. XXX TO DO: describe syntax. |
| */ |
| public static final String DEVICE_ADMIN_META_DATA = "android.app.device_admin"; |
| |
| private DevicePolicyManager mManager; |
| private ComponentName mWho; |
| |
| /** |
| * Retrieve the DevicePolicyManager interface for this administrator to work |
| * with the system. |
| */ |
| public DevicePolicyManager getManager(Context context) { |
| if (mManager != null) { |
| return mManager; |
| } |
| mManager = (DevicePolicyManager)context.getSystemService( |
| Context.DEVICE_POLICY_SERVICE); |
| return mManager; |
| } |
| |
| /** |
| * Retrieve the ComponentName describing who this device administrator is, for |
| * use in {@link DevicePolicyManager} APIs that require the administrator to |
| * identify itself. |
| */ |
| public ComponentName getWho(Context context) { |
| if (mWho != null) { |
| return mWho; |
| } |
| mWho = new ComponentName(context, getClass()); |
| return mWho; |
| } |
| |
| /** |
| * Called after the administrator is first enabled, as a result of |
| * receiving {@link #ACTION_DEVICE_ADMIN_ENABLED}. At this point you |
| * can use {@link DevicePolicyManager} to set your desired policies. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onEnabled(Context context, Intent intent) { |
| } |
| |
| /** |
| * Called when the user has asked to disable the administrator, as a result of |
| * receiving {@link #ACTION_DEVICE_ADMIN_DISABLE_REQUESTED}, giving you |
| * a chance to present a warning message to them. The message is returned |
| * as the result; if null is returned (the default implementation), no |
| * message will be displayed. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| * @return Return the warning message to display to the user before |
| * being disabled; if null is returned, no message is displayed. |
| */ |
| public CharSequence onDisableRequested(Context context, Intent intent) { |
| return null; |
| } |
| |
| /** |
| * Called prior to the administrator being disabled, as a result of |
| * receiving {@link #ACTION_DEVICE_ADMIN_DISABLED}. Upon return, you |
| * can no longer use the protected parts of the {@link DevicePolicyManager} |
| * API. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onDisabled(Context context, Intent intent) { |
| } |
| |
| /** |
| * Called after the user has changed their password, as a result of |
| * receiving {@link #ACTION_PASSWORD_CHANGED}. At this point you |
| * can use {@link DevicePolicyManager#getCurrentFailedPasswordAttempts() |
| * DevicePolicyManager.getCurrentFailedPasswordAttempts()} |
| * to retrieve the active password characteristics. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onPasswordChanged(Context context, Intent intent) { |
| } |
| |
| /** |
| * Called after the user has failed at entering their current password, as a result of |
| * receiving {@link #ACTION_PASSWORD_FAILED}. At this point you |
| * can use {@link DevicePolicyManager} to retrieve the number of failed |
| * password attempts. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onPasswordFailed(Context context, Intent intent) { |
| } |
| |
| /** |
| * Called after the user has succeeded at entering their current password, |
| * as a result of receiving {@link #ACTION_PASSWORD_SUCCEEDED}. This will |
| * only be received the first time they succeed after having previously |
| * failed. |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onPasswordSucceeded(Context context, Intent intent) { |
| } |
| |
| /** |
| * Called periodically when the password is about to expire or has expired. It will typically |
| * be called at these times: on device boot, once per day before the password expires, |
| * and at the time when the password expires. |
| * |
| * <p>If the password is not updated by the user, this method will continue to be called |
| * once per day until the password is changed or the device admin disables password expiration. |
| * |
| * <p>The admin will typically post a notification requesting the user to change their password |
| * in response to this call. The actual password expiration time can be obtained by calling |
| * {@link DevicePolicyManager#getPasswordExpiration(ComponentName) } |
| * |
| * <p>The admin should be sure to take down any notifications it posted in response to this call |
| * when it receives {@link DeviceAdminReceiver#onPasswordChanged(Context, Intent) }. |
| * |
| * @param context The running context as per {@link #onReceive}. |
| * @param intent The received intent as per {@link #onReceive}. |
| */ |
| public void onPasswordExpiring(Context context, Intent intent) { |
| } |
| |
| /** |
| * Intercept standard device administrator broadcasts. Implementations |
| * should not override this method; it is better to implement the |
| * convenience callbacks for each action. |
| */ |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| if (ACTION_PASSWORD_CHANGED.equals(action)) { |
| onPasswordChanged(context, intent); |
| } else if (ACTION_PASSWORD_FAILED.equals(action)) { |
| onPasswordFailed(context, intent); |
| } else if (ACTION_PASSWORD_SUCCEEDED.equals(action)) { |
| onPasswordSucceeded(context, intent); |
| } else if (ACTION_DEVICE_ADMIN_ENABLED.equals(action)) { |
| onEnabled(context, intent); |
| } else if (ACTION_DEVICE_ADMIN_DISABLE_REQUESTED.equals(action)) { |
| CharSequence res = onDisableRequested(context, intent); |
| if (res != null) { |
| Bundle extras = getResultExtras(true); |
| extras.putCharSequence(EXTRA_DISABLE_WARNING, res); |
| } |
| } else if (ACTION_DEVICE_ADMIN_DISABLED.equals(action)) { |
| onDisabled(context, intent); |
| } else if (ACTION_PASSWORD_EXPIRING.equals(action)) { |
| onPasswordExpiring(context, intent); |
| } |
| } |
| } |