自定义CrashHandler轻轻松松让你查看程序崩溃

今天测试遇到崩溃，而我又没办法查看，于是老司机教了我一招。下面是CrashHandler类：package com.bbk.bfcupload.bfcuploadtestdemo.util;import android.annotation.SuppressLint;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.Environment;import com.eebbk.bfc.uploadsdk.uploadmanage.LogUtils;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.Thread.UncaughtExceptionHandler;import java.lang.reflect.Field;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;/*** UncaughtException处理类,当程序发生Uncaught异常的时候,由该类来接管程序,并记录发送错误报告.** @author way*/public class CrashHandler implements UncaughtExceptionHandler {private Context mContext;private UncaughtExceptionHandler mDefaultHandler; // 系统默认的UncaughtException处理类private static CrashHandler INSTANCE = new CrashHandler(); // CrashHandler实例private Map<String, String> info = new HashMap<String, String>(); // 用来存储设备信息和异常信息/*** 保证只有一个CrashHandler实例*/private CrashHandler() {}/*** 获取CrashHandler实例 ,单例模式*/public static CrashHandler getInstance() {return INSTANCE;}/*** 初始化** @param context*/public void init(Context context) {mContext = context.getApplicationContext();mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 获取系统默认的UncaughtException处理器Thread.setDefaultUncaughtExceptionHandler(this);// 设置该CrashHandler为程序的默认处理器}/*** 当UncaughtException发生时会转入该重写的方法来处理*/@Overridepublic void uncaughtException(Thread thread, Throwable ex) {if (mDefaultHandler != null) {handleException(ex);// 如果自定义的没有处理则让系统默认的异常处理器来处理mDefaultHandler.uncaughtException(thread, ex);// 退出程序android.os.Process.killProcess(android.os.Process.myPid());}}/*** 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.** @param ex 异常信息 <a* href="\"http://www.eoeandroid.com/home.php?mod=space&uid=7300\""* target="\"_blank\"">@return</a> true 如果处理了该异常信息;否则返回false.*/public boolean handleException(final Throwable ex) {if (ex == null) return false;LogUtils.e(ex, " uncaught exception !");// 收集设备参数信息collectDeviceInfo(mContext);// 保存日志文件final String exString = getCrashInfoString(ex);saveCrashInfo2File(exString, mContext);return true;}/*** 收集设备参数信息** @param context*/public void collectDeviceInfo(Context context) {try {PackageManager pm = context.getPackageManager();// 获得包管理器PackageInfo pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_ACTIVITIES);// 得到该应用的信息，即主Activityif (pi != null) {String versionName = pi.versionName == null ? "null" : pi.versionName;String versionCode = pi.versionCode + "";info.put("versionName", versionName);info.put("versionCode", versionCode);}} catch (NameNotFoundException e) {LogUtils.e("Error: " + e);}Field[] fields = Build.class.getDeclaredFields();// 反射机制for (Field field : fields) {try {field.setAccessible(true);info.put(field.getName(), field.get("").toString());} catch (IllegalArgumentException e) {LogUtils.e("Error: " + e);} catch (IllegalAccessException e) {LogUtils.e("Error: " + e);}}}private String getCrashInfoString(Throwable ex) {StringBuffer sb = new StringBuffer();for (Map.Entry<String, String> entry : info.entrySet()) {String key = entry.getKey();String value = entry.getValue();sb.append(key).append("=").append(value).append("\r\n");}Writer writer = new StringWriter();PrintWriter pw = new PrintWriter(writer);ex.printStackTrace(pw);Throwable cause = ex.getCause();// 循环着把所有的异常信息写入writer中while (cause != null) {cause.printStackTrace(pw);cause = cause.getCause();}pw.close();// 记得关闭String result = writer.toString();sb.append(result);return sb.toString();}@SuppressLint("SimpleDateFormat")public static String saveCrashInfo2File(String exString, Context context) {long timetamp = System.currentTimeMillis();String time = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());String fileName = "-crash-" + time + "-" + timetamp + ".log";if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {try {//File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "SynChinese");File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + ".crash" + File.separator + context.getPackageName());if (!dir.exists()) {dir.mkdirs();}File outfile = new File(dir, fileName);FileOutputStream fos = new FileOutputStream(outfile);fos.write(exString.getBytes());fos.close();return outfile.getAbsolutePath();} catch (FileNotFoundException e) {LogUtils.e("Error: " + e);} catch (IOException e) {LogUtils.e("Error: " + e);}}return null;}}使用方法：在application里面调用：

CrashHandler.getInstance().init(this);

则遇到崩溃时会自动创建.crash文件，不过文件不可见的需要用文件管理器才可以