最新google官方ApiDemo源码

/* * 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 com.example.android.apis.app; import com.example.android.apis.R; import android.app.ActivityManager; import android.app.AlertDialog; import android.app.admin.DeviceAdminReceiver; import android.app.admin.DevicePolicyManager; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.preference.CheckBoxPreference; import android.preference.EditTextPreference; import android.preference.ListPreference; import android.preference.Preference; import android.preference.Preference.OnPreferenceChangeListener; import android.preference.Preference.OnPreferenceClickListener; import android.preference.PreferenceActivity; import android.preference.PreferenceCategory; import android.preference.PreferenceFragment; import android.preference.PreferenceScreen; import android.text.TextUtils; import android.util.Log; import android.widget.Toast; import java.util.List; /** * This activity provides a comprehensive UI for exploring and operating the DevicePolicyManager * api. It consists of two primary modules: * * 1: A device policy controller, implemented here as a series of preference fragments. Each * one contains code to monitor and control a particular subset of device policies. * * 2: A DeviceAdminReceiver, to receive updates from the DevicePolicyManager when certain aspects * of the device security status have changed. */ public class DeviceAdminSample extends PreferenceActivity { // Miscellaneous utilities and definitions private static final String TAG = "DeviceAdminSample"; private static final int REQUEST_CODE_ENABLE_ADMIN = 1; private static final int REQUEST_CODE_START_ENCRYPTION = 2; private static final long MS_PER_MINUTE = 60 * 1000; private static final long MS_PER_HOUR = 60 * MS_PER_MINUTE; private static final long MS_PER_DAY = 24 * MS_PER_HOUR; // The following keys are used to find each preference item private static final String KEY_ENABLE_ADMIN = "key_enable_admin"; private static final String KEY_DISABLE_CAMERA = "key_disable_camera"; private static final String KEY_DISABLE_KEYGUARD_WIDGETS = "key_disable_keyguard_widgets"; private static final String KEY_DISABLE_KEYGUARD_SECURE_CAMERA = "key_disable_keyguard_secure_camera"; private static final String KEY_CATEGORY_QUALITY = "key_category_quality"; private static final String KEY_SET_PASSWORD = "key_set_password"; private static final String KEY_RESET_PASSWORD = "key_reset_password"; private static final String KEY_QUALITY = "key_quality"; private static final String KEY_MIN_LENGTH = "key_minimum_length"; private static final String KEY_MIN_LETTERS = "key_minimum_letters"; private static final String KEY_MIN_NUMERIC = "key_minimum_numeric"; private static final String KEY_MIN_LOWER_CASE = "key_minimum_lower_case"; private static final String KEY_MIN_UPPER_CASE = "key_minimum_upper_case"; private static final String KEY_MIN_SYMBOLS = "key_minimum_symbols"; private static final String KEY_MIN_NON_LETTER = "key_minimum_non_letter"; private static final String KEY_CATEGORY_EXPIRATION = "key_category_expiration"; private static final String KEY_HISTORY = "key_history"; private static final String KEY_EXPIRATION_TIMEOUT = "key_expiration_timeout"; private static final String KEY_EXPIRATION_STATUS = "key_expiration_status"; private static final String KEY_CATEGORY_LOCK_WIPE = "key_category_lock_wipe"; private static final String KEY_MAX_TIME_SCREEN_LOCK = "key_max_time_screen_lock"; private static final String KEY_MAX_FAILS_BEFORE_WIPE = "key_max_fails_before_wipe"; private static final String KEY_LOCK_SCREEN = "key_lock_screen"; private static final String KEY_WIPE_DATA = "key_wipe_data"; private static final String KEY_WIP_DATA_ALL = "key_wipe_data_all"; private static final String KEY_CATEGORY_ENCRYPTION = "key_category_encryption"; private static final String KEY_REQUIRE_ENCRYPTION = "key_require_encryption"; private static final String KEY_ACTIVATE_ENCRYPTION = "key_activate_encryption"; // Interaction with the DevicePolicyManager DevicePolicyManager mDPM; ComponentName mDeviceAdminSample; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Prepare to work with the DPM mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE); mDeviceAdminSample = new ComponentName(this, DeviceAdminSampleReceiver.class); } /** * We override this method to provide PreferenceActivity with the top-level preference headers. */ @Override public void onBuildHeaders(List<Header> target) { loadHeadersFromResource(R.xml.device_admin_headers, target); } /** * Helper to determine if we are an active admin */ private boolean isActiveAdmin() { return mDPM.isAdminActive(mDeviceAdminSample); } /** * Common fragment code for DevicePolicyManager access. Provides two shared elements: * * 1. Provides instance variables to access activity/context, DevicePolicyManager, etc. * 2. Provides support for the "set password" button(s) shared by multiple fragments. */ public static class AdminSampleFragment extends PreferenceFragment implements OnPreferenceChangeListener, OnPreferenceClickListener{ // Useful instance variables protected DeviceAdminSample mActivity; protected DevicePolicyManager mDPM; protected ComponentName mDeviceAdminSample; protected boolean mAdminActive; // Optional shared UI private PreferenceScreen mSetPassword; private EditTextPreference mResetPassword; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Retrieve the useful instance variables mActivity = (DeviceAdminSample) getActivity(); mDPM = mActivity.mDPM; mDeviceAdminSample = mActivity.mDeviceAdminSample; mAdminActive = mActivity.isActiveAdmin(); // Configure the shared UI elements (if they exist) mResetPassword = (EditTextPreference) findPreference(KEY_RESET_PASSWORD); mSetPassword = (PreferenceScreen) findPreference(KEY_SET_PASSWORD); if (mResetPassword != null) { mResetPassword.setOnPreferenceChangeListener(this); } if (mSetPassword != null) { mSetPassword.setOnPreferenceClickListener(this); } } @Override public void onResume() { super.onResume(); mAdminActive = mActivity.isActiveAdmin(); reloadSummaries(); // Resetting the password via API is available only to active admins if (mResetPassword != null) { mResetPassword.setEnabled(mAdminActive); } } /** * Called automatically at every onResume. Should also call explicitly any time a * policy changes that may affect other policy values. */ protected void