anddroid异常处理之UncaughtException

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UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
1.java文件

public class CrashHandler implements Thread.UncaughtExceptionHandler {public static final String TAG = "CrashHandler";// CrashHandler 实例private static CrashHandler INSTANCE = new CrashHandler();// 程序的 Context 对象private Context mContext;// 系统默认的 UncaughtException 处理类private Thread.UncaughtExceptionHandler mDefaultHandler;// 用来存储设备信息和异常信息private Map<String, String> infos = new HashMap<String, String>();// 用于格式化日期,作为日志文件名的一部分private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");/** 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;// 获取系统默认的 UncaughtException 处理器mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 设置该 CrashHandler 为程序的默认处理器Thread.setDefaultUncaughtExceptionHandler(this);}/*** 当 UncaughtException 发生时会转入该函数来处理*/@Overridepublic void uncaughtException(Thread thread, Throwable ex) {if (!handleException(ex) && mDefaultHandler != null) {// 如果用户没有处理则让系统默认的异常处理器来处理mDefaultHandler.uncaughtException(thread, ex);} else {try {Thread.sleep(2000);} catch (InterruptedException e) {Log.e(TAG, "error : ", e);}//捕获异常后退出整个应用程序App.application.RemoveActivity();// 结束线程，一般与移除所有Activity配合使用android.os.Process.killProcess(android.os.Process.myPid());// System.exit(0);}}/*** 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* @return true：如果处理了该异常信息；否则返回 false*/private boolean handleException(Throwable ex) {if (ex == null) {return false;}// 使用 Toast 来显示异常信息new Thread() {@Overridepublic void run() {Looper.prepare();Toast.makeText(mContext, "很抱歉，程序出现异常，即将退出。", Toast.LENGTH_LONG).show();Looper.loop();}}.start();// 收集设备参数信息collectDeviceInfo(mContext);// 保存日志文件saveCrashInfo2File(ex);return true;}/*** 收集设备参数信息* @param ctx*/public void collectDeviceInfo(Context ctx) {try {PackageManager pm = ctx.getPackageManager();PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);if (pi != null) {String versionName = pi.versionName == null ? "null" : pi.versionName;String versionCode = pi.versionCode + "";infos.put("versionName", versionName);infos.put("versionCode", versionCode);}} catch (PackageManager.NameNotFoundException e) {Log.e(TAG, "an error occured when collect package info", e);}Field[] fields = Build.class.getDeclaredFields();for (Field field : fields) {try {field.setAccessible(true);infos.put(field.getName(), field.get(null).toString());Log.d(TAG, field.getName() + " : " + field.get(null));} catch (Exception e) {Log.e(TAG, "an error occured when collect crash info", e);}}}/*** 保存错误信息到文件中** @param ex* @return  返回文件名称,便于将文件传送到服务器*/private String saveCrashInfo2File(Throwable ex) {StringBuffer sb = new StringBuffer();for (Map.Entry<String, String> entry : infos.entrySet()) {String key = entry.getKey();String value = entry.getValue();sb.append(key + "=" + value + "\n");}Writer writer = new StringWriter();PrintWriter printWriter = new PrintWriter(writer);ex.printStackTrace(printWriter);Throwable cause = ex.getCause();while (cause != null) {cause.printStackTrace(printWriter);cause = cause.getCause();}printWriter.close();String result = writer.toString();sb.append(result);try {long timestamp = System.currentTimeMillis();String time = formatter.format(new Date());String fileName = "crash-" + time + "-" + timestamp + ".log";if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {String path = "/sdcard/crash/";File dir = new File(path);if (!dir.exists()) {dir.mkdirs();}FileOutputStream fos = new FileOutputStream(path + fileName);fos.write(sb.toString().getBytes());fos.close();}return fileName;} catch (Exception e) {Log.e(TAG, "an error occured while writing file...", e);}return null;}
}

2.定义自己的application类，进行异常处理CrashHandler 初始化

public class App extends Application {/*** 全局Application，方便调用*/public static App application;public SharedPreferences SP;public SharedPreferences.Editor EDIT;public static List<Activity> list_activity;public void onCreate() {super.onCreate();application = this;list_activity=new ArrayList<Activity>();SP = getSharedPreferences("config", MODE_PRIVATE);EDIT = SP.edit();CrashHandler crashHandler = CrashHandler.getInstance();crashHandler.init(application);}/*** 清空退款任务栈，需要在开启每一个activity之后把其加入到list_activity集合中*/public static void RemoveActivity(){if(!list_activity.isEmpty()){//list集合不为空，移除activityfor(Activity activity: list_activity){activity.finish();}}}}