Android Open Source - Common-Library Exception Catcher

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License

The source code is released under:
Apache License
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Java Source Code

package com.morgan.library.snippet;
/*  w w  w  . j av  a  2  s  .c om*/
import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.util.Arrays;
import java.util.Properties;
import java.util.TreeSet;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Looper;
import android.text.format.Time;
import android.util.Log;
import android.view.Gravity;
import android.widget.Toast;

public class ExceptionCatcher implements UncaughtExceptionHandler {

  /** Debug Log tag */
  public static final String TAG = "CrashHandler";
  /**
   * ????????????,?Debug????????, ?Release????????????????
   * */
  public static final boolean DEBUG = false;
  /** ?????UncaughtException????? */
  private Thread.UncaughtExceptionHandler mDefaultHandler;
  /** CrashHandler?? */
  private static ExceptionCatcher INSTANCE;
  /** ????Context?? */
  private Context mContext;
  /** ??Properties?????????????????????? */
  private Properties mDeviceCrashInfo = new Properties();
  private static final String VERSION_NAME = "versionName";
  private static final String VERSION_CODE = "versionCode";
  private static final String STACK_TRACE = "STACK_TRACE";
  /** ???????????? */
  private static final String CRASH_REPORTER_EXTENSION = ".cr";

  /** ??????????CrashHandler?? */
  private ExceptionCatcher() {
  }

  /** ????CrashHandler?? ,??????? */
  public static ExceptionCatcher getInstance() {
    if (INSTANCE == null) {
      INSTANCE = new ExceptionCatcher();
    }
    return INSTANCE;
  }

  /**
   * ????,??Context??, ?????????UncaughtException?????, ???CrashHandler????????????
   * 
   * @param ctx
   */
  public void init(Context ctx) {
    mContext = ctx;
    mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
    Thread.setDefaultUncaughtExceptionHandler(this);
  }

  /**
   * ?UncaughtException??????????????????
   */
  @Override
  public void uncaughtException(Thread thread, Throwable ex) {
    if (!handleException(ex) && mDefaultHandler != null) {
      // ???????????????????????????????
      mDefaultHandler.uncaughtException(thread, ex);
    } else {
      // Sleep????????????
      try {
        Thread.sleep(5000);
      } catch (InterruptedException e) {
        Log.e(TAG, "Error : ", e);
      }
      android.os.Process.killProcess(android.os.Process.myPid());
      System.exit(10);
    }
  }

  /**
   * ?????????,???????? ?????????????????????. ????????????????????????????????
   * 
   * @param ex
   * @return true:??????????????;??????false
   */
  private boolean handleException(Throwable ex) {
    if (ex == null) {
      Log.w(TAG, "handleException --- ex==null");
      return true;
    }
    final String msg = ex.getLocalizedMessage();
    if (msg == null) {
      return false;
    }
    // ??Toast???????????
    new Thread() {
      @Override
      public void run() {
        Looper.prepare();
        Toast toast = Toast.makeText(mContext, "????????????:\r\n" + msg,
            Toast.LENGTH_LONG);
        toast.setGravity(Gravity.CENTER, 0, 0);
        toast.show();
        // MsgPrompt.showMsg(mContext, "??????", msg+"\n?????");
        Looper.loop();
      }
    }.start();
    // ????????
    collectCrashDeviceInfo(mContext);
    // ?????????
    saveCrashInfoToFile(ex);
    // ??????????????
    sendCrashReportsToServer(mContext);
    return true;
  }

  /**
   * ??????????, ??????????????????????????????
   */
  public void sendPreviousReportsToServer() {
    sendCrashReportsToServer(mContext);
  }

  /**
   * ???????????????,???????????????????.
   * 
   * @param ctx
   */
  private void sendCrashReportsToServer(Context ctx) {
    String[] crFiles = getCrashReportFiles(ctx);
    if (crFiles != null && crFiles.length > 0) {
      TreeSet<String> sortedFiles = new TreeSet<String>();
      sortedFiles.addAll(Arrays.asList(crFiles));
      for (String fileName : sortedFiles) {
        File cr = new File(ctx.getFilesDir(), fileName);
        postReport(cr);
        cr.delete();// ???????????
      }
    }
  }

  private void postReport(File file) {
    // TODO ??????????????
  }

  /**
   * ?????????????
   * 
   * @param ctx
   * @return
   */
  private String[] getCrashReportFiles(Context ctx) {
    File filesDir = ctx.getFilesDir();
    FilenameFilter filter = new FilenameFilter() {
      public boolean accept(File dir, String name) {
        return name.endsWith(CRASH_REPORTER_EXTENSION);
      }
    };
    return filesDir.list(filter);
  }

  /**
   * ?????????????
   * 
   * @param ex
   * @return
   */
  private String saveCrashInfoToFile(Throwable ex) {
    Writer info = new StringWriter();
    PrintWriter printWriter = new PrintWriter(info);
    ex.printStackTrace(printWriter);
    Throwable cause = ex.getCause();
    while (cause != null) {
      cause.printStackTrace(printWriter);
      cause = cause.getCause();
    }
    String result = info.toString();
    printWriter.close();
    mDeviceCrashInfo.put("EXEPTION", ex.getLocalizedMessage());
    mDeviceCrashInfo.put(STACK_TRACE, result);
    try {
      // long timestamp = System.currentTimeMillis();
      Time t = new Time("GMT+8");
      t.setToNow(); // ????????
      int date = t.year * 10000 + t.month * 100 + t.monthDay;
      int time = t.hour * 10000 + t.minute * 100 + t.second;
      String fileName = "crash-" + date + "-" + time
          + CRASH_REPORTER_EXTENSION;
      FileOutputStream trace = mContext.openFileOutput(fileName,
          Context.MODE_PRIVATE);
      mDeviceCrashInfo.store(trace, "");
      trace.flush();
      trace.close();
      return fileName;
    } catch (Exception e) {
      Log.e(TAG, "an error occured while writing report file...", e);
    }
    return null;
  }

  /**
   * ??????????????
   * 
   * @param ctx
   */
  public void collectCrashDeviceInfo(Context ctx) {
    try {
      PackageManager pm = ctx.getPackageManager();
      PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
          PackageManager.GET_ACTIVITIES);
      if (pi != null) {
        mDeviceCrashInfo.put(VERSION_NAME,
            pi.versionName == null ? "not set" : pi.versionName);
        mDeviceCrashInfo.put(VERSION_CODE, "" + pi.versionCode);
      }
    } catch (NameNotFoundException e) {
      Log.e(TAG, "Error while collect package info", e);
    }
    // ?????????????????.?Build?????????????????,
    // ??: ???????,????? ???????????????
    // ????????????????????
    Field[] fields = Build.class.getDeclaredFields();
    for (Field field : fields) {
      try {
        field.setAccessible(true);
        mDeviceCrashInfo.put(field.getName(), "" + field.get(null));
        if (DEBUG) {
          Log.d(TAG, field.getName() + " : " + field.get(null));
        }
      } catch (Exception e) {
        Log.e(TAG, "Error while collect crash info", e);
      }
    }
  }

}
Java Source Code List
