Android開發：休眠喚醒或開機後cmwap/cmnet網路不能串連的解決辦法

Android手機（移動GSM）在休眠或開機後不能成功啟用網路連結（設定都正常），有時候甚至狀態列表徵圖是串連的，但網路依舊不可用。

如下解決方案，不知可通用，但測試HTC野火手機移動版可使用：

(被這個問題折騰死了，從本站相關文章可以看到，之前嘗試了APN切換也不行，估計是網路enable==false)

import java.lang.reflect.Method;004 005import android.content.ContentResolver;006import android.content.ContentValues;007import android.content.Context;008import android.database.Cursor;009import android.database.SQLException;010import android.net.ConnectivityManager;011import android.net.NetworkInfo;012import android.net.Uri;013import android.telephony.TelephonyManager;014import android.util.Log;015/**016 * Wizzer.cn017 * @author Wizzer018 *019 */020public class NetCheck {021    public static final Uri APN_URI = Uri.parse("content://telephony/carriers");022    public static final Uri DEFAULTAPN_URI = Uri023            .parse("content://telephony/carriers/restore");024    public static final Uri CURRENT_APN_URI = Uri025            .parse("content://telephony/carriers/preferapn");026    public static Context c1;027 028    public static String getCurrentAPNFromSetting(ContentResolver resolver) {029        Cursor cursor = null;030        try {031            cursor = resolver.query(CURRENT_APN_URI, null, null, null, null);032            String curApnId = null;033            String apnName1 = null;034            if (cursor != null && cursor.moveToFirst()) {035                curApnId = cursor.getString(cursor.getColumnIndex("_id"));036                apnName1 = cursor.getString(cursor.getColumnIndex("apn"));037            }038            Log.e("NetCheck getCurrentAPNFromSetting", "curApnId:" + curApnId039                    + " apnName1:" + apnName1);040            // find apn name from apn list041            if (curApnId != null) {042                cursor = resolver.query(APN_URI, null, " _id = ?",043                        new String[] { curApnId }, null);044                if (cursor != null && cursor.moveToFirst()) {045                    String apnName = cursor.getString(cursor046                            .getColumnIndex("apn"));047                    return apnName;048                }049            }050 051        } catch (SQLException e) {052            Log.e("NetCheck getCurrentAPNFromSetting", e.getMessage());053        } finally {054            if (cursor != null) {055                cursor.close();056            }057        }058 059        return null;060    }061 062    public static int updateCurrentAPN(ContentResolver resolver, String newAPN) {063        Cursor cursor = null;064        try {065            // get new apn id from list066            cursor = resolver.query(APN_URI, null, " apn = ? and current = 1",067                    new String[] { newAPN.toLowerCase() }, null);068            String apnId = null;069            if (cursor != null && cursor.moveToFirst()) {070                apnId = cursor.getString(cursor.getColumnIndex("_id"));071            }072            Log.e("NetCheck updateCurrentAPN", "apnId:" + apnId);073            // set new apn id as chosen one074            if (apnId != null) {075                ContentValues values = new ContentValues();076                values.put("apn_id", apnId);077                resolver.update(CURRENT_APN_URI, values, null, null);078            } else {079                // apn id not found, return 0.080                return 0;081            }082        } catch (SQLException e) {083            Log.e("NetCheck updateCurrentAPN", e.getMessage());084        } finally {085            if (cursor != null) {086                cursor.close();087            }088        }089 090        // update success091        return 1;092    }093 094    public String getApn(Context c) {095        boolean netSataus = false;096 097        ConnectivityManager conManager = (ConnectivityManager) c098                .getSystemService(Context.CONNECTIVITY_SERVICE);099        if (conManager.getActiveNetworkInfo() != null) {100            netSataus = conManager.getActiveNetworkInfo().isAvailable();101 102        }103        NetworkInfo info = conManager104        .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);105        String oldAPN = StringUtils.null2String(info.getExtraInfo());106        Log107        .e("NetCheck getApn", "oldAPN:" + oldAPN + " netSataus:"108                + netSataus);109        if (netSataus == false) {110            Log.e("NetCheck getApn", "setMobileDataEnabled(true)");111            setMobileDataEnabled(c, true); 112 113            try {114                Thread.sleep(4012);115            } catch (InterruptedException e) {116                e.printStackTrace();117            }118        }119        if("".equals(oldAPN)){120            updateCurrentAPN(c.getContentResolver(), "cmnet");121            try {122                Thread.sleep(1500);123            } catch (InterruptedException e) {124                e.printStackTrace();125            }126        }127        info = conManager128        .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);129        oldAPN = StringUtils.null2String(info.getExtraInfo());130        Log131                .e("NetCheck getApn", "newApn:" + oldAPN);132        return oldAPN.toLowerCase();133    }134 135    public boolean setMobileDataEnabled(Context c, boolean enabled) {136        final TelephonyManager mTelManager;137        mTelManager = (TelephonyManager) c138                .getSystemService(Context.TELEPHONY_SERVICE);139        try {140 141            Method m = mTelManager.getClass()142                    .getDeclaredMethod("getITelephony");143            m.setAccessible(true);144            Object telephony = m.invoke(mTelManager);145            m = telephony.getClass().getMethod(146                    (enabled ? "enable" : "disable") + "DataConnectivity");147            m.invoke(telephony);148            return true;149        } catch (Exception e) {150            Log.e("NetCheck ", "cannot fake telephony", e);151            return false;152        }153    }154 155}