ContentProvider实现数据库操作

package com.liwenzhi.asr.sqlitedemo.util; import android.os.Handler; import android.os.HandlerThread; import android.os.Message; import android.os.Process; import android.text.TextUtils; import android.util.Log; import java.io.File; import java.text.SimpleDateFormat; import java.util.Arrays; import java.util.Comparator; import java.util.Date; import java.util.Locale; /** * Log管理类 */ public final class LogUtil { static final String TAG = "LogUtil"; static final int LEVEL_DEBUG = 1; static final int LEVEL_INFO = 2; static final int LEVEL_WARNING = 3; static final int LEVEL_ERROR = 4; static final int DBG_LEVEL = 1;//BuildConfig.DBG_LEVEL; static final int MSG_SAVE_LOG = 1; static final int MSG_SAVE_LOG_TICKER = 2; static final int MSG_FORCE_SAVE_LOG = 3; static final int MSG_DELETE_LOG_FILE = 4; static final int MSG_DELETE_CRASH_LOG_FILE = 5; static final int SAVE_LOG_TIMEOUT = 15 * 1000; //15s static final int MAX_LOG_FILE_NUM = 5; static final int MAX_LOG_FILE_SIZE = 5 * 1024 * 1024; //5M static final int MAX_CRASH_LOG_FILE_NUM = 20; static final int LOG_FILE_CACHE = 32 * 1024; //32K static final String LOG_FILE_NAME_PREFIX = "log"; static final String LOG_DIR_PREFIX = "/sdcard/robotmobile/"; static final String LOG_SAVE_DIR = LOG_DIR_PREFIX + "debug/"; static final String LOG_DIR = LOG_SAVE_DIR + "log/" + Utils.getProcName(); public static final String CRASH_DIR = LOG_SAVE_DIR + "crash/" + Utils.getProcName(); private static String APP_TAG = "Unknown"; private static boolean mSaveLog = false; private static Handler sHandler; private static HandlerThread sHandlerThread; private static StringBuffer sLogBuffer = new StringBuffer(); static final SimpleDateFormat SDF = new SimpleDateFormat("yyyyMMdd HH:mm:ss:SSS"); static final SimpleDateFormat SDF_CRASH = new SimpleDateFormat("yyyyMMdd_HH-mm-ss-SSS"); static { sHandlerThread = new HandlerThread("LogUtil"); sHandlerThread.start(); sHandler = new Handler(sHandlerThread.getLooper()) { @Override public void handleMessage(Message msg) { doHandleMessage(msg); } }; checkLogFileNum(); checkCrashLogFileNUm(); sHandler.sendEmptyMessageDelayed(MSG_SAVE_LOG_TICKER, SAVE_LOG_TIMEOUT); } public static void updateSaveLog(boolean saveLog) { mSaveLog = saveLog; } public static void setAppTag(String appTag) { APP_TAG = appTag; } public static void d(String tag, String message) { if(LEVEL_DEBUG >= DBG_LEVEL) { logInner(LEVEL_DEBUG, tag, message); } } public static void i(String tag, String message) { if(LEVEL_INFO >= DBG_LEVEL) { logInner(LEVEL_INFO, tag, message); } } public static void w(String tag, String message) { if(LEVEL_WARNING >= DBG_LEVEL) { logInner(LEVEL_WARNING, tag, message); } } public static void e(String tag, String message) { if(LEVEL_ERROR >= DBG_LEVEL) { logInner(LEVEL_ERROR, tag, message); } } private static void logInner(int level, String tag, String message) { if(message == null) { return; } switch (level) { case LEVEL_DEBUG: Log.d(APP_TAG + "-" + tag, message); break; case LEVEL_INFO: Log.i(APP_TAG + "-" + tag, message); break; case LEVEL_WARNING: Log.w(APP_TAG + "-" + tag, message); break; case LEVEL_ERROR: Log.e(APP_TAG + "-" + tag, message); break; default: throw new IllegalArgumentException("logInner: invalid log level=" + level); } saveLog(APP_TAG + "-" + tag, message); } private static void checkLogFileNum() { File dir = new File(LOG_DIR); String[] files = dir.list(); if(files != null && files.length > MAX_LOG_FILE_NUM) { sHandler.sendEmptyMessage(MSG_DELETE_LOG_FILE); } } public static void checkCrashLogFileNUm() { File dir = new File(CRASH_DIR); String[] files = dir.list(); if(files != null && files.length > MAX_CRASH_LOG_FILE_NUM) { sHandler.sendEmptyMessage(MSG_DELETE_CRASH_LOG_FILE); } } public static synchronized void flushLog() { sHandler.sendEmptyMessage(MSG_FORCE_SAVE_LOG); } private static synchronized void saveLog(String tag, String message) { if(mSaveLog) { StringBuffer sb = new StringBuffer(); sb.append(getTime(System.currentTimeMillis())).append(" ").append(Process.myPid()).append(" ").append(Process.myTid()) .append(" ").append(tag).append(": ").append(message).append('\n'); Message msg = sHandler.obtainMessage(MSG_SAVE_LOG); msg.obj = sb.toString(); sHandler.sendMessage(msg); } } private static void doHandleMessage(Message msg) { switch (msg.what) { case MSG_SAVE_LOG: if(msg.obj != null) { //sHandler.removeMessages(MSG_SAVE_LOG_TICKER); //sHandler.sendEmptyMessageDelayed(MSG_SAVE_LOG_TICKER, SAVE_LOG_TIMEOUT); doSaveLog((String) msg.obj, false); } break; case MSG_SAVE_LOG_TICKER: sHandler.sendEmptyMessageDelayed(MSG_SAVE_LOG_TICKER, SAVE_LOG_TIMEOUT); doSaveLog(null, true); break; case MSG_FORCE_SAVE_LOG: Log.i(TAG, "MSG_FORCE_SAVE_LOG"); sHandler.removeMessages(MSG_SAVE_LOG_TICKER); sHandler.sendEmptyMessageDelayed(MSG_SAVE_LOG_TICKER, SAVE_LOG_TIMEOUT); doSaveLog(null, true); break; case MSG_DELETE_LOG_FILE: deleteLogFile(); break; case MSG_DELETE_CRASH_LOG_FILE: deleteCrashLogFile(); break; default: break; } } private static void deleteLogFile() { Log.d(TAG, "deleteLogFile"); String[] files = new File(LOG_DIR).list(); if(files != null) { for(int i = MAX_LOG_FILE_NUM + 1; i <= files.length; i++) { File f = new File(LOG_DIR, LOG_FILE_NAME_PREFIX + "." + i); f.delete(); } } } private static void deleteCrashLogFile() { Log.d(TAG, "deleteCrashLogFile"); File[] files = new File(CRASH_DIR).listFiles(); if(files != null) { Arrays.sort(files, new Comparator<File>() { @Override public int compare(File f1, File f2) { return Long.valueOf(f1.lastModified()).compareTo(f2.lastModified()); } }); //一次性删除最早的10个crash日志文件 for(int i = 0; i < 10; i++) { files[i].delete(); } } } public static String getTime(long time) { String str = SDF.format(new Date(time)); return str; } public static String getCrashTime(long time) { String str = SDF_CRASH.format(new Date(time)); return str; } private static synchronized void doSaveLog(String log, boolean force) { //Log.d(TAG, "doSaveLog: force=" + force); if(!TextUtils.isEmpty(log)) { sLogBuffer.append(log);