android showDialog(int what)

本文介绍如何在Android中使用onCreateDialog方法创建并显示不同类型的对话框,包括设置图标、标题、消息内容及按钮响应等。

android showDialog(int what)

利用onCreateDialog 显示对话框的方式

 

1.重写onCreateDialog(int id)

@Override
 protected Dialog onCreateDialog(int id) {
  Builder builder = null;
  switch (id) {
  case 1:
   builder = new AlertDialog.Builder(this)
          .setIcon(R.drawable.d_message)
          .setTitle("Message")
          .setMessage(R.string.runeEncrypt_message)
          .setNeutralButton("知道了", new DialogInterface.OnClickListener() {
          
          @Override
          public void onClick(DialogInterface dialog, int which) {
           // TODO Auto-generated method stub
           ShowView.back(RunEncoding.this);
          }
         });
   break;
  case 2:
   builder = new AlertDialog.Builder(RunEncoding.this)
    .setIcon(R.drawable.d_message)
   .setTitle("取消")
   .setMessage("您确实要取消吗")
   .setPositiveButton(R.string.positive, new DialogInterface.OnClickListener() {
    
    @Override
    public void onClick(DialogInterface dialog, int which) {
     // TODO Auto-generated method stub
     cancelFlag = false;
    }
   }).
   setNegativeButton(R.string.negative, new DialogInterface.OnClickListener() {
    
    @Override
    public void onClick(DialogInterface dialog, int which) {
     // TODO Auto-generated method stub
     
    }
   });
   break; 
  default:
   break;
  }
  return builder.create();
 }

 

2,调用显示对话框 showDialog(id); 该方法会调用onCreateDialog方法来显示对话框

/* * Copyright (C) 2008 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.network.apn; import android.app.Activity; import android.app.Dialog; import android.app.ProgressDialog; import android.app.settings.SettingsEnums; import android.content.BroadcastReceiver; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.database.Cursor; /// M: Disable screen when MMS is in transaction. @{ import android.net.ConnectivityManager; import android.net.NetworkInfo; /// @} import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.HandlerThread; import android.os.Looper; import android.os.Message; import android.os.PersistableBundle; import android.os.SystemProperties; import android.os.UserHandle; import android.os.UserManager; import android.provider.Telephony; import android.telephony.CarrierConfigManager; import android.telephony.PhoneStateListener; import android.telephony.PreciseDataConnectionState; import android.telephony.SubscriptionInfo; import android.telephony.SubscriptionManager; import android.telephony.TelephonyManager; import android.telephony.data.ApnSetting; import android.text.TextUtils; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.widget.Toast; import androidx.preference.Preference; import androidx.preference.PreferenceGroup; import com.android.internal.telephony.PhoneConstants; import com.android.internal.telephony.TelephonyIntents; import com.android.settings.R; import com.android.settings.RestrictedSettingsFragment; import com.android.settings.network.SubscriptionUtil; import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin; /// M: Add for checking MTK VoLTE feature. import com.mediatek.settings.FeatureOption; /// M: Add for APN setting plugin. import com.mediatek.settings.UtilsExt; /// M: Add for supporting CDMA APN. import com.mediatek.settings.cdma.CdmaApnSetting; /// M: Add for APN setting plugin. import com.mediatek.settings.ext.IApnSettingsExt; /// M: Add for supporting SIM hot swap. @{ import com.mediatek.settings.sim.SimHotSwapHandler; import com.mediatek.settings.sim.SimHotSwapHandler.OnSimHotSwapListener; /// @} /// M: Add for SIM On/Off feature. @{ import com.mediatek.settings.sim.SimOnOffSwitchHandler; import com.mediatek.settings.sim.SimOnOffSwitchHandler.OnSimOnOffSwitchListener; /// @} /// M: Add SIM utility. import com.mediatek.settings.sim.TelephonyUtils; /// M: Add for the new APN fields. import mediatek.telephony.MtkTelephony; import java.util.ArrayList; /** Handle each different apn setting. */ public class ApnSettings extends RestrictedSettingsFragment implements Preference.OnPreferenceChangeListener { static final String TAG = "ApnSettings"; public static final String EXTRA_POSITION = "position"; public static final String RESTORE_CARRIERS_URI = "content://telephony/carriers/restore"; public static final String PREFERRED_APN_URI = "content://telephony/carriers/preferapn"; public static final String APN_ID = "apn_id"; public static final String SUB_ID = "sub_id"; public static final String MVNO_TYPE = "mvno_type"; public static final String MVNO_MATCH_DATA = "mvno_match_data"; private static final String[] CARRIERS_PROJECTION = new String[] { Telephony.Carriers._ID, Telephony.Carriers.NAME, Telephony.Carriers.APN, Telephony.Carriers.TYPE, Telephony.Carriers.MVNO_TYPE, Telephony.Carriers.MVNO_MATCH_DATA, Telephony.Carriers.EDITED_STATUS, /// M: Add for the new APN types. MtkTelephony.Carriers.SOURCE_TYPE }; /** Copied from {@code com.android.internal.telephony.TelephonyIntents} */ private static final String ACTION_SIM_STATE_CHANGED = "android.intent.action.SIM_STATE_CHANGED"; /** Copied from {@code com.android.internal.telephony.IccCardConstants} */ public static final String INTENT_KEY_ICC_STATE = "ss"; public static final String INTENT_VALUE_ICC_ABSENT = "ABSENT"; private static final int ID_INDEX = 0; private static final int NAME_INDEX = 1; private static final int APN_INDEX = 2; private static final int TYPES_INDEX = 3; private static final int MVNO_TYPE_INDEX = 4; private static final int MVNO_MATCH_DATA_INDEX = 5; private static final int EDITED_INDEX = 6; /// M: Add for the new APN types. private static final int SOURCE_TYPE_INDEX = 7; private static final int MENU_NEW = Menu.FIRST; private static final int MENU_RESTORE = Menu.FIRST + 1; private static final int EVENT_RESTORE_DEFAULTAPN_START = 1; private static final int EVENT_RESTORE_DEFAULTAPN_COMPLETE = 2; private static final int DIALOG_RESTORE_DEFAULTAPN = 1001; private static final Uri DEFAULTAPN_URI = Uri.parse(RESTORE_CARRIERS_URI); private static final Uri PREFERAPN_URI = Uri.parse(PREFERRED_APN_URI); private boolean mRestoreDefaultApnMode; private UserManager mUserManager; private TelephonyManager mTelephonyManager; private RestoreApnUiHandler mRestoreApnUiHandler; private RestoreApnProcessHandler mRestoreApnProcessHandler; private HandlerThread mRestoreDefaultApnThread; private SubscriptionInfo mSubscriptionInfo; private int mSubId; private int mPhoneId; private String mMvnoType; private String mMvnoMatchData; private String mSelectedKey; private IntentFilter mIntentFilter; private boolean mUnavailable; private boolean mHideImsApn; private boolean mAllowAddingApns; private boolean mHidePresetApnDetails; /// M: Add for supporting SIM hot swap. private SimHotSwapHandler mSimHotSwapHandler = null; /// M: Add for APN setting plugin. private IApnSettingsExt mApnExt; /// M: Add for SIM On/Off feature. @{ private boolean mSimOnOffEnabled; private SimOnOffSwitchHandler mSimOnOffSwitchHandler = null; /// @} /// M: Add restore APN flag. private boolean mRestoreOngoing = false; public ApnSettings() { super(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); } private final PhoneStateListener mPhoneStateListener = new PhoneStateListener() { @Override public void onPreciseDataConnectionStateChanged( PreciseDataConnectionState dataConnectionState) { if (dataConnectionState.getState() == TelephonyManager.DATA_CONNECTED) { if (!mRestoreDefaultApnMode) { fillList(); } else { /// M: Goolge issue, show dialog when restore after apn when phonestate changed. // showDialog(DIALOG_RESTORE_DEFAULTAPN); } } } }; private final BroadcastReceiver mReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals( TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) { PhoneConstants.DataState state = getMobileDataState(intent); switch (state) { case CONNECTED: if (!mRestoreDefaultApnMode) { fillList(); } else { /// M: Add for ALPS02326359, don't show dialog here. // showDialog(DIALOG_RESTORE_DEFAULTAPN); } break; } /// M: Disable screen when MMS is in transaction. updateScreenForDataStateChange(context, intent); } else if (ACTION_SIM_STATE_CHANGED.equals(action) && intent.getStringExtra(INTENT_KEY_ICC_STATE) .equals(INTENT_VALUE_ICC_ABSENT)) { final SubscriptionManager sm = context.getSystemService(SubscriptionManager.class); if (sm != null && !sm.isActiveSubscriptionId(mSubId)) { Log.d(TAG, "Due to SIM absent, closes APN settings page"); finish(); } } else if (intent.getAction().equals( TelephonyManager.ACTION_SUBSCRIPTION_CARRIER_IDENTITY_CHANGED)) { if (!mRestoreDefaultApnMode) { int extraSubId = intent.getIntExtra(TelephonyManager.EXTRA_SUBSCRIPTION_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); if (SubscriptionManager.isValidSubscriptionId(extraSubId) && mPhoneId == SubscriptionUtil.getPhoneId(context, extraSubId) && extraSubId != mSubId) { // subscription has changed mSubId = extraSubId; mSubscriptionInfo = getSubscriptionInfo(mSubId); restartPhoneStateListener(mSubId); } fillList(); } /// M: Update screen enabled status when airplane mode is changed. @{ } else if (intent.getAction().equals(Intent.ACTION_AIRPLANE_MODE_CHANGED)) { updateScreenEnableState(context); /// @} /// M: Update screen enabled status when call state is changed. @{ } else if (intent.getAction().equals(TelephonyManager.ACTION_PHONE_STATE_CHANGED)) { updateScreenEnableState(context); /// @} } } }; private static PhoneConstants.DataState getMobileDataState(Intent intent) { String str = intent.getStringExtra(PhoneConstants.STATE_KEY); if (str != null) { return Enum.valueOf(PhoneConstants.DataState.class, str); } else { return PhoneConstants.DataState.DISCONNECTED; } } private void restartPhoneStateListener(int subId) { if (mRestoreDefaultApnMode) { return; } final TelephonyManager updatedTelephonyManager = mTelephonyManager.createForSubscriptionId(subId); // restart monitoring when subscription has been changed mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE); mTelephonyManager = updatedTelephonyManager; mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_PRECISE_DATA_CONNECTION_STATE); } @Override public int getMetricsCategory() { return SettingsEnums.APN; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); final Activity activity = getActivity(); android.util.Log.d("yxw777","aaaaaaaaaaa"); mSubId = activity.getIntent().getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); mPhoneId = SubscriptionUtil.getPhoneId(activity, mSubId); mIntentFilter = new IntentFilter(); mIntentFilter.addAction(TelephonyManager.ACTION_SUBSCRIPTION_CARRIER_IDENTITY_CHANGED); mIntentFilter.addAction(ACTION_SIM_STATE_CHANGED); mIntentFilter.addAction(TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED); /// M: Update screen enabled status when airplane mode is changed. mIntentFilter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED); /// M: Update screen enabled status when call state is changed. mIntentFilter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED); setIfOnlyAvailableForAdmins(true); mSubscriptionInfo = getSubscriptionInfo(mSubId); mTelephonyManager = activity.getSystemService(TelephonyManager.class); CarrierConfigManager configManager = (CarrierConfigManager) getSystemService(Context.CARRIER_CONFIG_SERVICE); PersistableBundle b = configManager.getConfigForSubId(mSubId); mHideImsApn = b.getBoolean(CarrierConfigManager.KEY_HIDE_IMS_APN_BOOL); mAllowAddingApns = b.getBoolean(CarrierConfigManager.KEY_ALLOW_ADDING_APNS_BOOL); if (mAllowAddingApns) { String[] readOnlyApnTypes = b.getStringArray( CarrierConfigManager.KEY_READ_ONLY_APN_TYPES_STRING_ARRAY); // if no apn type can be edited, do not allow adding APNs if (ApnEditor.hasAllApns(readOnlyApnTypes)) { Log.d(TAG, "not allowing adding APN because all APN types are read only"); mAllowAddingApns = false; } } mHidePresetApnDetails = b.getBoolean(CarrierConfigManager.KEY_HIDE_PRESET_APN_DETAILS_BOOL); mUserManager = UserManager.get(activity); /// M: Finish activity when no active subscription is found. @{ if (mSubscriptionInfo == null) { Log.d(TAG, "onCreate, no active sub for subId=" + mSubId); getActivity().finish(); return; } /// @} /// M: Add for APN setting plugin. @{ mApnExt = UtilsExt.getApnSettingsExt(activity); mApnExt.initTetherField(this); /// @ } /// M: Add for supporting SIM hot swap. @{ mSimHotSwapHandler = new SimHotSwapHandler(getActivity().getApplicationContext()); mSimHotSwapHandler.registerOnSimHotSwap(new OnSimHotSwapListener() { @Override public void onSimHotSwap() { if (getActivity() != null) { Log.d(TAG, "onSimHotSwap, finish activity."); getActivity().finish(); } } }); /// @} Log.d(TAG, "onCreate, subId=" + mSubId + ", mPhoneId=" + mPhoneId); /// M: Add for SIM On/Off feature. @{ mSimOnOffEnabled = TelephonyUtils.isSimOnOffEnabled(); if (mSimOnOffEnabled && SubscriptionManager.isValidSlotIndex(mPhoneId)) { mSimOnOffSwitchHandler = new SimOnOffSwitchHandler(getActivity(), mPhoneId); mSimOnOffSwitchHandler.registerOnSimOnOffSwitch(new OnSimOnOffSwitchListener() { @Override public void onSimOnOffStateChanged() { if (getActivity() != null) { Log.d(TAG, "onSimOnOffStateChanged, finish activity."); getActivity().finish(); } } }); } /// @} } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); getEmptyTextView().setText(R.string.apn_settings_not_available); mUnavailable = isUiRestricted(); setHasOptionsMenu(!mUnavailable); if (mUnavailable) { addPreferencesFromResource(R.xml.placeholder_prefs); return; } addPreferencesFromResource(R.xml.apn_settings); } @Override public void onResume() { super.onResume(); if (mUnavailable) { return; } getActivity().registerReceiver(mReceiver, mIntentFilter, Context.RECEIVER_EXPORTED_UNAUDITED); restartPhoneStateListener(mSubId); if (!mRestoreDefaultApnMode) { fillList(); /// M: In case dialog not dismiss as activity is in background, so when resume back, // need to remove the dialog @{ removeDialog(DIALOG_RESTORE_DEFAULTAPN); /// @} } /// M: Add for APN setting plugin. @{ mApnExt.updateTetherState(); mApnExt.onApnSettingsEvent(IApnSettingsExt.RESUME); /// @} } @Override public void onPause() { super.onPause(); if (mUnavailable) { return; } getActivity().unregisterReceiver(mReceiver); mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE); /// M: Add for APN setting plugin. mApnExt.onApnSettingsEvent(IApnSettingsExt.PAUSE); } @Override public void onDestroy() { super.onDestroy(); if (mRestoreDefaultApnThread != null) { mRestoreDefaultApnThread.quit(); } /// M: Add for supporting SIM hot swap. @{ if (mSimHotSwapHandler != null) { mSimHotSwapHandler.unregisterOnSimHotSwap(); mSimHotSwapHandler = null; } /// @} /// M: Add for SIM On/Off feature. @{ if (mSimOnOffSwitchHandler != null) { mSimOnOffSwitchHandler.unregisterOnSimOnOffSwitch(); mSimOnOffSwitchHandler = null; } /// @} } @Override public EnforcedAdmin getRestrictionEnforcedAdmin() { final UserHandle user = UserHandle.of(mUserManager.getProcessUserId()); if (mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS, user) && !mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS, user)) { return EnforcedAdmin.MULTIPLE_ENFORCED_ADMIN; } return null; } private SubscriptionInfo getSubscriptionInfo(int subId) { return SubscriptionManager.from(getActivity()).getActiveSubscriptionInfo(subId); } public void fillList() { final int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId() : SubscriptionManager.INVALID_SUBSCRIPTION_ID; final Uri simApnUri = Uri.withAppendedPath(Telephony.Carriers.SIM_APN_URI, String.valueOf(subId)); StringBuilder where = new StringBuilder("NOT (type='ia' AND (apn=\"\" OR apn IS NULL)) AND " + "user_visible!=0"); // Remove Emergency type, users should not mess with that where.append(" AND NOT (type='emergency')"); /// M: Add for supporting MTK VoLTE. if (mHideImsApn || !FeatureOption.MTK_VOLTE_SUPPORT) { where.append(" AND NOT (type='ims')"); } /// M: Add for APN Setting plugin. String order = mApnExt.getApnSortOrder(Telephony.Carriers.DEFAULT_SORT_ORDER); Log.d(TAG, "fillList, where=" + where + ", order=" + order); Cursor cursor = getContentResolver().query(simApnUri, CARRIERS_PROJECTION, where.toString(), null, order); if (cursor != null) { PreferenceGroup apnPrefList = (PreferenceGroup) findPreference("apn_list"); apnPrefList.removeAll(); ArrayList<ApnPreference> apnList = new ArrayList<ApnPreference>(); ArrayList<ApnPreference> mmsApnList = new ArrayList<ApnPreference>(); mSelectedKey = getSelectedApnKey(); cursor.moveToFirst(); while (!cursor.isAfterLast()) { String name = cursor.getString(NAME_INDEX); String apn = cursor.getString(APN_INDEX); String key = cursor.getString(ID_INDEX); String type = cursor.getString(TYPES_INDEX); int edited = cursor.getInt(EDITED_INDEX); mMvnoType = cursor.getString(MVNO_TYPE_INDEX); mMvnoMatchData = cursor.getString(MVNO_MATCH_DATA_INDEX); /// M: check source type, some types are not editable int sourcetype = cursor.getInt(SOURCE_TYPE_INDEX); /// M: Add for skipping specific APN type. @{ if (shouldSkipApn(type)) { cursor.moveToNext(); continue; } /// M: Add for APN Setting plugin. name = mApnExt.updateApnName(name, sourcetype); ApnPreference pref = new ApnPreference(getPrefContext()); pref.setKey(key); pref.setTitle(name); pref.setPersistent(false); pref.setOnPreferenceChangeListener(this); pref.setSubId(subId); /// M: for [Read Only APN] pref.setApnEditable(mApnExt.isAllowEditPresetApn(subId, type, apn, sourcetype)); if (mHidePresetApnDetails && edited == Telephony.Carriers.UNEDITED) { pref.setHideDetails(); } else { pref.setSummary(apn); } boolean selectable = ((type == null) || (type.contains(ApnSetting.TYPE_DEFAULT_STRING) /// M: Add for ALPS02500557, do not select emergency APN. && !type.equals("ia") && !type.equals("ims") && !type.equals("emergency"))) /// M: Add for APN Setting plugin. && mApnExt.isSelectable(type); pref.setSelectable(selectable); Log.d(TAG, "fillList, selectedKey=" + mSelectedKey + ", key=" + key + ", name=" + name + ", selectable=" + selectable); if (selectable) { /// M: select prefer APN later, as the apn list are not solid now @{ //if ((mSelectedKey != null) && mSelectedKey.equals(key)) { // pref.setChecked(); //} /// @} apnList.add(pref); /// for china telecom apn feature mApnExt.customizeApnState(subId, apn, apnList); } else { mmsApnList.add(pref); /// for china telecom apn feature mApnExt.customizeApnState(subId, apn, mmsApnList); } cursor.moveToNext(); } cursor.close(); for (Preference preference : apnList) { apnPrefList.addPreference(preference); } for (Preference preference : mmsApnList) { apnPrefList.addPreference(preference); } /// M: Add for setting set prefer APN. setPreferApnChecked(apnList); /// M: Add for updating screen enable state. updateScreenEnableState(getActivity()); } } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { if (!mUnavailable) { /// M: Don't allow to add new APN when restoring APN. if (mAllowAddingApns && !mRestoreOngoing) { menu.add(0, MENU_NEW, 0, getResources().getString(R.string.menu_new)) .setIcon(R.drawable.ic_add_24dp) .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM); } menu.add(0, MENU_RESTORE, 0, getResources().getString(R.string.menu_restore)) .setIcon(android.R.drawable.ic_menu_upload); } super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case MENU_NEW: addNewApn(); return true; case MENU_RESTORE: restoreDefaultApn(); return true; } return super.onOptionsItemSelected(item); } private void addNewApn() { /// M: Don't allow to add new APN when restoring APN. @{ if (mRestoreOngoing) { return; } /// @} Log.d(TAG, "addNewApn"); Intent intent = new Intent(Intent.ACTION_INSERT, Telephony.Carriers.CONTENT_URI); int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId() : SubscriptionManager.INVALID_SUBSCRIPTION_ID; intent.putExtra(SUB_ID, subId); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); if (!TextUtils.isEmpty(mMvnoType) && !TextUtils.isEmpty(mMvnoMatchData)) { intent.putExtra(MVNO_TYPE, mMvnoType); intent.putExtra(MVNO_MATCH_DATA, mMvnoMatchData); } /// M: Add for APN Setting plugin. mApnExt.addApnTypeExtra(intent); startActivity(intent); } @Override public boolean onPreferenceChange(Preference preference, Object newValue) { Log.d(TAG, "onPreferenceChange(): Preference - " + preference + ", newValue - " + newValue + ", newValue type - " + newValue.getClass()); if (newValue instanceof String) { setSelectedApnKey((String) newValue); } return true; } private void setSelectedApnKey(String key) { mSelectedKey = key; ContentResolver resolver = getContentResolver(); ContentValues values = new ContentValues(); values.put(APN_ID, mSelectedKey); resolver.update(getUriForCurrSubId(PREFERAPN_URI), values, null, null); } private String getSelectedApnKey() { String key = null; Cursor cursor = getContentResolver().query(getUriForCurrSubId(PREFERAPN_URI), new String[] {"_id"}, null, null, Telephony.Carriers.DEFAULT_SORT_ORDER); if (cursor.getCount() > 0) { cursor.moveToFirst(); key = cursor.getString(ID_INDEX); } cursor.close(); Log.d(TAG,"getSelectedApnKey, key=" + key); return key; } private boolean restoreDefaultApn() { Log.d(TAG, "restoreDefaultApn, restoreApn=" + mRestoreDefaultApnMode); /// M: Remove dialog first before restoring default APN again. @{ if (mRestoreDefaultApnMode) { removeDialog(DIALOG_RESTORE_DEFAULTAPN); } /// @} // Callback of data connection change could be some noise during the stage of restore. mTelephonyManager.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE); showDialog(DIALOG_RESTORE_DEFAULTAPN); mRestoreDefaultApnMode = true; if (mRestoreApnUiHandler == null) { mRestoreApnUiHandler = new RestoreApnUiHandler(); } if (mRestoreApnProcessHandler == null || mRestoreDefaultApnThread == null) { mRestoreDefaultApnThread = new HandlerThread( "Restore default APN Handler: Process Thread"); mRestoreDefaultApnThread.start(); mRestoreApnProcessHandler = new RestoreApnProcessHandler( mRestoreDefaultApnThread.getLooper(), mRestoreApnUiHandler); } mRestoreApnProcessHandler .sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_START); return true; } // Append subId to the Uri private Uri getUriForCurrSubId(Uri uri) { int subId = mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId() : SubscriptionManager.INVALID_SUBSCRIPTION_ID; if (SubscriptionManager.isValidSubscriptionId(subId)) { return Uri.withAppendedPath(uri, "subId/" + String.valueOf(subId)); } else { return uri; } } private class RestoreApnUiHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case EVENT_RESTORE_DEFAULTAPN_COMPLETE: Log.d(TAG, "handleMessage, RESTORE_DEFAULTAPN_COMPLETE."); Activity activity = getActivity(); if (activity == null) { mRestoreDefaultApnMode = false; return; } fillList(); /// M: Disable screen in airplane mode. boolean airplaneModeOn = TelephonyUtils.isAirplaneModeOn(activity); getPreferenceScreen().setEnabled(!airplaneModeOn); mRestoreDefaultApnMode = false; removeDialog(DIALOG_RESTORE_DEFAULTAPN); Toast.makeText( activity, getResources().getString( R.string.restore_default_apn_completed), Toast.LENGTH_LONG).show(); /// M: Add restore APN flag. mRestoreOngoing = false; restartPhoneStateListener(mSubId); break; } } } private class RestoreApnProcessHandler extends Handler { private Handler mRestoreApnUiHandler; RestoreApnProcessHandler(Looper looper, Handler restoreApnUiHandler) { super(looper); this.mRestoreApnUiHandler = restoreApnUiHandler; } @Override public void handleMessage(Message msg) { switch (msg.what) { case EVENT_RESTORE_DEFAULTAPN_START: Log.d(TAG, "handleMessage, RESTORE_DEFAULTAPN_START"); ContentResolver resolver = getContentResolver(); resolver.delete(getUriForCurrSubId(DEFAULTAPN_URI), null, null); mRestoreApnUiHandler .sendEmptyMessage(EVENT_RESTORE_DEFAULTAPN_COMPLETE); /// M: Add restore APN flag. mRestoreOngoing = true; break; } } } @Override public Dialog onCreateDialog(int id) { if (id == DIALOG_RESTORE_DEFAULTAPN) { ProgressDialog dialog = new ProgressDialog(getActivity()) { public boolean onTouchEvent(MotionEvent event) { return true; } }; dialog.setMessage(getResources().getString(R.string.restore_default_apn)); dialog.setCancelable(false); return dialog; } return null; } @Override public int getDialogMetricsCategory(int dialogId) { if (dialogId == DIALOG_RESTORE_DEFAULTAPN) { return SettingsEnums.DIALOG_APN_RESTORE_DEFAULT; } return 0; } private void updateScreenForDataStateChange(Context context, Intent intent) { String apnType = intent.getStringExtra(PhoneConstants.DATA_APN_TYPE_KEY); Log.d(TAG, "updateScreenForDataStateChange, apnType=" + apnType); if (PhoneConstants.APN_TYPE_MMS.equals(apnType)) { boolean airplaneModeOn = TelephonyUtils.isAirplaneModeOn(context); getPreferenceScreen().setEnabled(!airplaneModeOn && !isMmsInTransaction(context) /// M: Add for APN Setting plugin. @{ && mApnExt.getScreenEnableState( (mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId() : SubscriptionManager.INVALID_SUBSCRIPTION_ID), getActivity())); /// @} } } private void updateScreenEnableState(Context context) { int subId = (mSubscriptionInfo != null ? mSubscriptionInfo.getSubscriptionId() : SubscriptionManager.INVALID_SUBSCRIPTION_ID); boolean simReady = false; if (SubscriptionManager.isValidSubscriptionId(subId)) { simReady = (TelephonyManager.SIM_STATE_READY == TelephonyManager.getDefault() .getSimState(SubscriptionManager.getSlotIndex(subId))); } boolean airplaneModeOn = TelephonyUtils.isAirplaneModeOn(context); /// M: Add for checking call state. boolean inCall = TelephonyUtils.isInCall(context); boolean enable = !airplaneModeOn && simReady && !inCall; Log.d(TAG, "updateScreenEnableState, subId=" + subId + ", enable=" + enable + ", airplaneModeOn=" + airplaneModeOn + ", simReady=" + simReady + ", inCall=" + inCall); getPreferenceScreen().setEnabled(enable /// M: Add for APN Setting plugin. && mApnExt.getScreenEnableState(subId, getActivity())); if (getActivity() != null) { getActivity().invalidateOptionsMenu(); } } private boolean isMmsInTransaction(Context context) { boolean isMmsInTransaction = false; ConnectivityManager cm = (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE); if (cm != null) { NetworkInfo networkInfo = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_MMS); if (networkInfo != null) { NetworkInfo.State state = networkInfo.getState(); Log.d(TAG, "isMmsInTransaction, mmsState=" + state); isMmsInTransaction = (state == NetworkInfo.State.CONNECTING || state == NetworkInfo.State.CONNECTED); } } return isMmsInTransaction; } public boolean shouldSkipApn(String type) { /// M: Add for APN Setting plugin. return "cmmail".equals(type); } @Override public void onPrepareOptionsMenu(Menu menu) { int size = menu.size(); boolean isAirplaneModeOn = TelephonyUtils.isAirplaneModeOn(getActivity()); boolean inCall = TelephonyUtils.isInCall(getActivity()); Log.d(TAG,"onPrepareOptionsMenu, isAirplaneModeOn=" + isAirplaneModeOn); // When airplane mode on need to disable options menu for (int i = 0; i< size; i++) { menu.getItem(i).setEnabled(!isAirplaneModeOn && !inCall); } super.onPrepareOptionsMenu(menu); } // compare prefer apn and set preference checked state private void setPreferApnChecked(ArrayList<ApnPreference> apnList) { if (apnList == null || apnList.isEmpty()) { return; } String selectedKey = null; if (mSelectedKey != null) { for (Preference pref : apnList) { if (mSelectedKey.equals(pref.getKey())) { ((ApnPreference) pref).setChecked(); selectedKey = mSelectedKey; } } } // can't find prefer APN in the list, reset to the first one ///M: Plug-in call to check whether reset to first one or not. if (mApnExt.shouldSelectFirstApn()) { if (selectedKey == null && apnList.get(0) != null) { ((ApnPreference) apnList.get(0)).setChecked(); selectedKey = apnList.get(0).getKey(); } } // save the new APN if (selectedKey != null && selectedKey != mSelectedKey) { setSelectedApnKey(selectedKey); mSelectedKey = selectedKey; } Log.d(TAG, "setPreferApnChecked, selectedKey=" + mSelectedKey); } public void onIntentUpdate(Intent newIntent) { final Activity activity = getActivity(); if (activity == null) { return; } final int subId = newIntent.getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); mSubscriptionInfo = SubscriptionManager.from(activity).getActiveSubscriptionInfo(subId); Log.d(TAG, "onIntentUpdate, subId=" + subId); } }
最新发布
12-03
<think> 我们面对的是一个来自Android设置应用的APN设置界面代码(ApnSettings.java)。这个类继承自RestrictedSettingsFragment,用于管理APN(接入点名称)的配置。用户可以通过这个界面查看、添加、编辑和恢复默认的APN设置。 代码分析: 1. 这个类主要处理APN列表的显示,包括从数据库查询APN、显示列表、处理用户选择等。 2. 它包含菜单项用于添加新APN和恢复默认APN。 3. 它监听数据连接状态、SIM卡状态等广播,以便在状态变化时更新UI。 4. 它使用Cursor从数据库查询APN信息,然后使用Preference显示。 5. 恢复默认APN的操作是在后台线程中执行的,并通过Handler与UI线程通信。 代码中标注了“M:”的注释,表明这是联发科(MediaTek)的修改。这些修改包括: - 支持CDMA APN - SIM热插拔处理 - 支持VoLTE - APN设置插件扩展 - 在飞行模式、通话状态等情况下更新UI状态 我们注意到代码中有一个日志输出:`android.util.Log.d("yxw777","aaaaaaaaaaa");`,这看起来像是一个调试日志,可能是在开发过程中临时添加的。通常情况下,在发布版本中,我们不应该保留调试日志,尤其是使用硬编码的标签和消息。 问题: 在`onCreate`方法中,有一行调试日志:`android.util.Log.d("yxw777","aaaaaaaaaaa");`。这行日志可能是在调试过程中添加的,但在生产代码中应该被移除或改为有意义的日志,并且使用类定义的TAG。 解决方案: 移除这行调试日志或者将其改为使用定义的TAG,并输出有意义的调试信息。由于代码中已经定义了TAG:`static final String TAG = "ApnSettings";`,我们应该使用这个TAG。 修改后的代码: 在`onCreate`方法中,将: ```java super.onCreate(icicle); final Activity activity = getActivity(); android.util.Log.d("yxw777","aaaaaaaaaaa"); mSubId = activity.getIntent().getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); ``` 改为: ```java super.onCreate(icicle); final Activity activity = getActivity(); Log.d(TAG, "onCreate"); mSubId = activity.getIntent().getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); ``` 这样,我们使用统一的TAG,并输出更有意义的信息(表明此时执行了onCreate方法)。 原因: 在代码中随意添加调试日志(尤其是硬编码标签和无意义的消息)不是一个好的实践。它可能会在日志中输出不必要的信息,影响性能,并且可能泄露敏感信息。此外,使用统一的TAG有助于日志过滤和问题排查。 注意:我们只修改了这一处,但代码中其他地方也有类似的日志输出,都使用了统一的TAG,所以这一处也应该保持一致。 另外,请注意,这个修改只是移除了无用的调试日志,并改为使用标准日志。如果这个日志是为了调试某个特定问题而添加,并且问题尚未解决,那么可能需要保留但改为更合适的消息。但是,根据问题描述,这个日志看起来是临时的,因此建议移除或改为常规日志。 由于我们无法得知这个日志的具体目的,但根据消息内容“aaaaaaaaaaa”来看,它很可能是临时调试,因此我们将其改为输出“onCreate”以表示进入这个方法。 最后,我们提供修改后的代码片段,并解释修改的原因。 修改后的代码片段: ```java @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); final Activity activity = getActivity(); Log.d(TAG, "onCreate"); // 使用定义的TAG,并输出有意义的信息 mSubId = activity.getIntent().getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); mPhoneId = SubscriptionUtil.getPhoneId(activity, mSubId); ... // 后续代码不变 ``` 这样修改后,日志输出将与其他日志保持一致,并且只记录进入onCreate方法,而不是无意义的字符串。 相关问题: 根据要求,我们需要提出四个相关问题。 §§相关问题§§: 1. 在Android开发中,为什么建议在发布版本中移除或禁用调试日志? 2. 在Android中,如何使用ContentResolver查询数据库,并解释代码中查询APN列表的Cursor如何处理? 3. 在ApnSettings类中,如何实现恢复默认APN的功能,并描述其涉及的多线程机制? 4. 解释CarrierConfigManager在APN设置中的作用,以及如何通过它来定制APN设置界面的行为? </think>这个代码片段是 Android 设置应用中管理 APN(接入点名称)配置的核心逻辑。主要问题是 `onCreate()` 方法中存在一个调试日志语句 `android.util.Log.d("yxw777","aaaaaaaaaaa");`,这不符合 Android 开发规范,应该被移除或替换。 ### 解决方案: ```java @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); final Activity activity = getActivity(); // 移除调试日志语句 mSubId = activity.getIntent().getIntExtra(SUB_ID, SubscriptionManager.INVALID_SUBSCRIPTION_ID); mPhoneId = SubscriptionUtil.getPhoneId(activity, mSubId); // ... 后续代码保持不变 ... } ``` ### 问题原因: 1. **硬编码标签**:`"yxw777"` 是硬编码的日志标签 2. **无意义内容**:`"aaaaaaaaaaa"` 没有提供有用的调试信息 3. **未使用标准 TAG**:没有使用类中定义的 `TAG` 常量(`static final String TAG = "ApnSettings"`) 4. **生产环境问题**:此类调试日志不应出现在生产代码中 ### 正确实践: 1. 使用预定义的 `TAG` 常量 2. 输出有意义的调试信息 3. 使用 `Log.isLoggable()` 控制详细日志 4. 在发布版本中禁用详细日志 ### 优化后的日志示例: ```java if (Log.isLoggable(TAG, Log.DEBUG)) { Log.d(TAG, "onCreate: subId=" + mSubId + ", phoneId=" + mPhoneId); } ``` ### 代码说明: 这个 `ApnSettings` 类负责: 1. 管理移动网络 APN 配置 2. 处理 APN 的添加/删除/编辑 3. 监听网络状态变化 4. 实现恢复默认 APN 功能 5. 处理 SIM 卡状态变化
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