android限制安装包来源,Android系统设置settings应用学习（一）--允许未知来源应用安装...
settings，是Android系統(tǒng)應用--設置的源代碼，包名稱為：com.android.settings
安全設置代碼：SecuritySettings.java
/*
* Copyright (C) 2007 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.android.settings;
import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.admin.DevicePolicyManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Vibrator;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceGroup;
import android.preference.PreferenceScreen;
import android.provider.Settings;
import android.provider.Telephony.SIMInfo;
import android.security.KeyStore;
import android.telephony.TelephonyManager;
import android.util.Log;
import com.android.internal.telephony.Phone;
import com.android.internal.widget.LockPatternUtils;
import com.android.settings.gemini.SimListEntrance;
import com.mediatek.xlog.Xlog;
import java.util.ArrayList;
import java.util.List;
import com.mediatek.featureoption.FeatureOption;
/**
* Gesture lock pattern settings.
*/
public class SecuritySettings extends SettingsPreferenceFragment
implements OnPreferenceChangeListener, DialogInterface.OnClickListener {
private static final String TAG = "SecuritySettings";
// Lock Settings
private static final String KEY_UNLOCK_SET_OR_CHANGE = "unlock_set_or_change";
private static final String KEY_BIOMETRIC_WEAK_IMPROVE_MATCHING =
"biometric_weak_improve_matching";
private static final String KEY_LOCK_ENABLED = "lockenabled";
private static final String KEY_VISIBLE_PATTERN = "visiblepattern";
private static final String KEY_TACTILE_FEEDBACK_ENABLED = "unlock_tactile_feedback";
private static final String KEY_SECURITY_CATEGORY = "security_category";
private static final String KEY_LOCK_AFTER_TIMEOUT = "lock_after_timeout";
private static final int SET_OR_CHANGE_LOCK_METHOD_REQUEST = 123;
private static final int CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST = 124;
// Misc Settings
private static final String KEY_SIM_LOCK = "sim_lock";
private static final String KEY_SIM_LOCK_PREF = "sim_lock_pref";
private static final String KEY_SHOW_PASSWORD = "show_password";
private static final String KEY_RESET_CREDENTIALS = "reset_credentials";
private static final String KEY_TOGGLE_INSTALL_APPLICATIONS = "toggle_install_applications";
DevicePolicyManager mDPM;
private ChooseLockSettingsHelper mChooseLockSettingsHelper;
private LockPatternUtils mLockPatternUtils;
private ListPreference mLockAfter;
private CheckBoxPreference mVisiblePattern;
private CheckBoxPreference mTactileFeedback;
private CheckBoxPreference mShowPassword;
private Preference mResetCredentials;
private CheckBoxPreference mToggleAppInstallation;
private DialogInterface mWarnInstallApps;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLockPatternUtils = new LockPatternUtils(getActivity());
mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
mChooseLockSettingsHelper = new ChooseLockSettingsHelper(getActivity());
}
private PreferenceScreen createPreferenceHierarchy() {
PreferenceScreen root = getPreferenceScreen();
if (root != null) {
root.removeAll();
}
addPreferencesFromResource(R.xml.security_settings);
root = getPreferenceScreen();
// Add options for lock/unlock screen
int resid = 0;
if (!mLockPatternUtils.isSecure()) {
if (mLockPatternUtils.isLockScreenDisabled()) {
resid = R.xml.security_settings_lockscreen;
} else {
resid = R.xml.security_settings_chooser;
}
} else if (mLockPatternUtils.usingBiometricWeak() &&
mLockPatternUtils.isBiometricWeakInstalled()) {
resid = R.xml.security_settings_biometric_weak;
} else {
switch (mLockPatternUtils.getKeyguardStoredPasswordQuality()) {
case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
resid = R.xml.security_settings_pattern;
break;
case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
resid = R.xml.security_settings_pin;
break;
case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
resid = R.xml.security_settings_password;
break;
}
}
addPreferencesFromResource(resid);
// Add options for device encryption
Xlog.d(TAG,"FeatureOption.MTK_EMMC_SUPPORT="+FeatureOption.MTK_EMMC_SUPPORT);
if(FeatureOption.MTK_EMMC_SUPPORT) {
// Add options for device encryption
DevicePolicyManager dpm =
(DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
switch (dpm.getStorageEncryptionStatus()) {
case DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE:
// The device is currently encrypted.
addPreferencesFromResource(R.xml.security_settings_encrypted);
break;
case DevicePolicyManager.ENCRYPTION_STATUS_INACTIVE:
// This device supports encryption but isn't encrypted.
addPreferencesFromResource(R.xml.security_settings_unencrypted);
break;
}
}
// lock after preference
mLockAfter = (ListPreference) root.findPreference(KEY_LOCK_AFTER_TIMEOUT);
if (mLockAfter != null) {
setupLockAfterPreference();
updateLockAfterPreferenceSummary();
}
// visible pattern
mVisiblePattern = (CheckBoxPreference) root.findPreference(KEY_VISIBLE_PATTERN);
// don't display visible pattern if biometric and backup is not pattern
if (resid == R.xml.security_settings_biometric_weak &&
mLockPatternUtils.getKeyguardStoredPasswordQuality() !=
DevicePolicyManager.PASSWORD_QUALITY_SOMETHING) {
PreferenceGroup securityCategory = (PreferenceGroup)
root.findPreference(KEY_SECURITY_CATEGORY);
if (securityCategory != null && mVisiblePattern != null) {
securityCategory.removePreference(root.findPreference(KEY_VISIBLE_PATTERN));
}
}
// tactile feedback. Should be common to all unlock preference screens.
mTactileFeedback = (CheckBoxPreference) root.findPreference(KEY_TACTILE_FEEDBACK_ENABLED);
if (!((Vibrator) getSystemService(Context.VIBRATOR_SERVICE)).hasVibrator()) {
PreferenceGroup securityCategory = (PreferenceGroup)
root.findPreference(KEY_SECURITY_CATEGORY);
if (securityCategory != null && mTactileFeedback != null) {
securityCategory.removePreference(mTactileFeedback);
}
}
// Append the rest of the settings
addPreferencesFromResource(R.xml.security_settings_misc);
// Do not display SIM lock for CDMA phone
TelephonyManager tm = TelephonyManager.getDefault();
if ((TelephonyManager.PHONE_TYPE_CDMA == tm.getCurrentPhoneType()) &&
(tm.getLteOnCdmaMode() != Phone.LTE_ON_CDMA_TRUE)) {
root.removePreference(root.findPreference(KEY_SIM_LOCK));
}else{
//Preference simLockPreferences = root.findPreference(KEY_SIM_LOCK);
Preference simLockPref = root.findPreference(KEY_SIM_LOCK_PREF);
List simList = SIMInfo.getInsertedSIMList(getActivity());
int nSimNum = simList.size();
if (nSimNum == 0) {
Xlog.d(TAG,"No sim found");
simLockPref.setEnabled(false);
}else if (nSimNum == 1) {
SIMInfo simInfo = simList.get(0);
Xlog.d(TAG,"Only one Sim inserted");
if (simInfo != null) {
Intent intent = new Intent();
intent.setClassName("com.android.settings", "com.android.settings.IccLockSettings");
int slot = SIMInfo.getSlotById(getActivity(), simInfo.mSimId);
intent.putExtra("slotid", simInfo.mSlot);
simLockPref.setIntent(intent);
}
} else if (nSimNum>1) {
Xlog.d(TAG,"two Sims inserted");
simLockPref.getExtras().putInt("type", SimListEntrance.PIN_SETTING_INDEX);
simLockPref.setFragment(SimListEntrance.class.getName());
}
}
// Show password
mShowPassword = (CheckBoxPreference) root.findPreference(KEY_SHOW_PASSWORD);
// Credential storage
mResetCredentials = root.findPreference(KEY_RESET_CREDENTIALS);
mToggleAppInstallation = (CheckBoxPreference) findPreference(
KEY_TOGGLE_INSTALL_APPLICATIONS);
mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());
return root;
}
private boolean isNonMarketAppsAllowed() {
return Settings.Secure.getInt(getContentResolver(),
Settings.Secure.INSTALL_NON_MARKET_APPS, 0) > 0;
}
private void setNonMarketAppsAllowed(boolean enabled) {
// Change the system setting
Settings.Secure.putInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS,
enabled ? 1 : 0);
}
private void warnAppInstallation() {
// TODO: DialogFragment?
mWarnInstallApps = new AlertDialog.Builder(getActivity()).setTitle(
getResources().getString(R.string.error_title))
.setIcon(com.android.internal.R.drawable.ic_dialog_alert)
.setMessage(getResources().getString(R.string.install_all_warning))
.setPositiveButton(android.R.string.yes, this)
.setNegativeButton(android.R.string.no, null)
.show();
}
public void onClick(DialogInterface dialog, int which) {
if (dialog == mWarnInstallApps && which == DialogInterface.BUTTON_POSITIVE) {
setNonMarketAppsAllowed(true);
mToggleAppInstallation.setChecked(true);
}
}
@Override
public void onDestroy() {
super.onDestroy();
if (mWarnInstallApps != null) {
mWarnInstallApps.dismiss();
}
}
private void setupLockAfterPreference() {
// Compatible with pre-Froyo
long currentTimeout = Settings.Secure.getLong(getContentResolver(),
Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, 5000);
mLockAfter.setValue(String.valueOf(currentTimeout));
mLockAfter.setOnPreferenceChangeListener(this);
final long adminTimeout = (mDPM != null ? mDPM.getMaximumTimeToLock(null) : 0);
final long displayTimeout = Math.max(0,
Settings.System.getInt(getContentResolver(), SCREEN_OFF_TIMEOUT, 0));
if (adminTimeout > 0) {
// This setting is a slave to display timeout when a device policy is enforced.
// As such, maxLockTimeout = adminTimeout - displayTimeout.
// If there isn't enough time, shows "immediately" setting.
disableUnusableTimeouts(Math.max(0, adminTimeout - displayTimeout));
}
}
private void updateLockAfterPreferenceSummary() {
// Update summary message with current value
long currentTimeout = Settings.Secure.getLong(getContentResolver(),
Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, 5000);
final CharSequence[] entries = mLockAfter.getEntries();
final CharSequence[] values = mLockAfter.getEntryValues();
int best = 0;
for (int i = 0; i < values.length; i++) {
long timeout = Long.valueOf(values[i].toString());
if (currentTimeout >= timeout) {
best = i;
}
}
mLockAfter.setSummary(getString(R.string.lock_after_timeout_summary, entries[best]));
}
private void disableUnusableTimeouts(long maxTimeout) {
final CharSequence[] entries = mLockAfter.getEntries();
final CharSequence[] values = mLockAfter.getEntryValues();
ArrayList revisedEntries = new ArrayList();
ArrayList revisedValues = new ArrayList();
for (int i = 0; i < values.length; i++) {
long timeout = Long.valueOf(values[i].toString());
if (timeout <= maxTimeout) {
revisedEntries.add(entries[i]);
revisedValues.add(values[i]);
}
}
if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
mLockAfter.setEntries(
revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
mLockAfter.setEntryValues(
revisedValues.toArray(new CharSequence[revisedValues.size()]));
final int userPreference = Integer.valueOf(mLockAfter.getValue());
if (userPreference <= maxTimeout) {
mLockAfter.setValue(String.valueOf(userPreference));
} else {
// There will be no highlighted selection since nothing in the list matches
// maxTimeout. The user can still select anything less than maxTimeout.
// TODO: maybe append maxTimeout to the list and mark selected.
}
}
mLockAfter.setEnabled(revisedEntries.size() > 0);
}
@Override
public void onResume() {
super.onResume();
// Make sure we reload the preference hierarchy since some of these settings
// depend on others...
createPreferenceHierarchy();
final LockPatternUtils lockPatternUtils = mChooseLockSettingsHelper.utils();
if (mVisiblePattern != null) {
mVisiblePattern.setChecked(lockPatternUtils.isVisiblePatternEnabled());
}
if (mTactileFeedback != null) {
mTactileFeedback.setChecked(lockPatternUtils.isTactileFeedbackEnabled());
}
mShowPassword.setChecked(Settings.System.getInt(getContentResolver(),
Settings.System.TEXT_SHOW_PASSWORD, 1) != 0);
KeyStore.State state = KeyStore.getInstance().state();
mResetCredentials.setEnabled(state != KeyStore.State.UNINITIALIZED);
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
final String key = preference.getKey();
final LockPatternUtils lockPatternUtils = mChooseLockSettingsHelper.utils();
if (KEY_UNLOCK_SET_OR_CHANGE.equals(key)) {
startFragment(this, "com.android.settings.ChooseLockGeneric$ChooseLockGenericFragment",
SET_OR_CHANGE_LOCK_METHOD_REQUEST, null);
} else if (KEY_BIOMETRIC_WEAK_IMPROVE_MATCHING.equals(key)) {
ChooseLockSettingsHelper helper =
new ChooseLockSettingsHelper(this.getActivity(), this);
if (!helper.launchConfirmationActivity(
CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST, null, null)) {
startBiometricWeakImprove(); // no password set, so no need to confirm
}
} else if (KEY_LOCK_ENABLED.equals(key)) {
lockPatternUtils.setLockPatternEnabled(isToggled(preference));
} else if (KEY_VISIBLE_PATTERN.equals(key)) {
lockPatternUtils.setVisiblePatternEnabled(isToggled(preference));
} else if (KEY_TACTILE_FEEDBACK_ENABLED.equals(key)) {
lockPatternUtils.setTactileFeedbackEnabled(isToggled(preference));
} else if (preference == mShowPassword) {
Settings.System.putInt(getContentResolver(), Settings.System.TEXT_SHOW_PASSWORD,
mShowPassword.isChecked() ? 1 : 0);
} else if (preference == mToggleAppInstallation) {
if (mToggleAppInstallation.isChecked()) {
mToggleAppInstallation.setChecked(false);
warnAppInstallation();
} else {
setNonMarketAppsAllowed(false);
}
} else {
// If we didn't handle it, let preferences handle it.
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
return true;
}
private boolean isToggled(Preference pref) {
return ((CheckBoxPreference) pref).isChecked();
}
/**
* see confirmPatternThenDisableAndClear
*/
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST &&
resultCode == Activity.RESULT_OK) {
startBiometricWeakImprove();
return;
}
createPreferenceHierarchy();
}
public boolean onPreferenceChange(Preference preference, Object value) {
if (preference == mLockAfter) {
int timeout = Integer.parseInt((String) value);
try {
Settings.Secure.putInt(getContentResolver(),
Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, timeout);
} catch (NumberFormatException e) {
Log.e("SecuritySettings", "could not persist lockAfter timeout setting", e);
}
updateLockAfterPreferenceSummary();
}
return true;
}
public void startBiometricWeakImprove(){
Intent intent = new Intent();
intent.setClassName("com.android.facelock", "com.android.facelock.AddToSetup");
startActivity(intent);
}
}
其中有關未知來源應用安裝的有：
mToggleAppInstallation = (CheckBoxPreference) findPreference(
KEY_TOGGLE_INSTALL_APPLICATIONS);
mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());
private boolean isNonMarketAppsAllowed() {
return Settings.Secure.getInt(getContentResolver(),
Settings.Secure.INSTALL_NON_MARKET_APPS, 0) > 0;
}
private void setNonMarketAppsAllowed(boolean enabled) {
// Change the system setting
Settings.Secure.putInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS,
enabled ? 1 : 0);
}
public void onClick(DialogInterface dialog, int which) {
if (dialog == mWarnInstallApps && which == DialogInterface.BUTTON_POSITIVE) {
setNonMarketAppsAllowed(true);
mToggleAppInstallation.setChecked(true);
}
}
源代碼Settings$Secure.class中有關允許未知來源應用安裝
/**
* Whether the package installer should allow installation of apps downloaded from
* sources other than the Android Market (vending machine).
*
* 1 = allow installing from other sources
* 0 = only allow installing from the Android Market
*/
public static final String INSTALL_NON_MARKET_APPS = "install_non_market_apps";
總結
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