Android 收集程序崩溃日志，保存本地

**Android 收集程序崩溃日志，保存本地。**

//记得动态添加sd卡读写权限

public class CrashHandler implements Thread.UncaughtExceptionHandler {    public static final String TAG = "CrashHandler";    String crashHead;    // 系统默认的UncaughtException处理类    private Thread.UncaughtExceptionHandler mDefaultHandler;    // CrashHandler实例    private static CrashHandler INSTANCE = new CrashHandler();    // 程序的Context对象    private Context mContext;    // 用来存储设备信息和异常信息    private Map infos = new HashMap();    // 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");    private String nameString = "xxcrashlog";    /** 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     */    @Override    public 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(3000);            } catch (InterruptedException e) {                Log.e(TAG, "error : ", e);            }            // 退出程序            android.os.Process.killProcess(android.os.Process.myPid());            System.exit(1);        }    }    /**     * 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() {            @Override            public void run() {                Looper.prepare();                Toast.makeText(mContext, "很抱歉,程序出现异常,正在收集日志，即将重启", Toast.LENGTH_LONG)                        .show();                Looper.loop();            }        }.start();        // 收集设备参数信息        collectDeviceInfo(mContext);        // 保存日志文件        String fileName = saveCrashInfo2File(ex);//        restartApp();        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);                 crashHead = "\n************* Crash Log Head ****************" +                        "\nDevice Manufacturer: " + Build.MANUFACTURER +// 设备厂商                        "\nDevice Model       : " + Build.MODEL +// 设备型号                        "\nAndroid Version    : " + Build.VERSION.RELEASE +// 系统版本                        "\nAndroid SDK        : " + Build.VERSION.SDK_INT +// SDK版本                        "\nApp VersionName    : " + versionName +                        "\nApp VersionCode    : " + versionCode +                        "\n************* Crash Log Head ****************\n\n";            }        } 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();        sb.append(crashHead);        for (Map.Entry 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 = nameString + "-" + time + "-" + timestamp                    + ".log";            if (Environment.getExternalStorageState().equals(                    Environment.MEDIA_MOUNTED)) {                String path = APP_FILE_PATH;//日志保存目录                File dir = new File("");                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;    }    private void restartApp(){        Intent intent = new Intent(mContext.getApplicationContext(), XiaoxiaoMainActivity.class);        AlarmManager mAlarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);        //重启应用，得使用PendingIntent        PendingIntent restartIntent = PendingIntent.getActivity(                mContext.getApplicationContext(), 0, intent,                Intent.FLAG_ACTIVITY_NEW_TASK);        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {            //Android6.0以上，包含6.0            mAlarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent); //解决Android6.0省电机制带来的不准时问题        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            //Android4.4到Android6.0之间，包含4.4            mAlarmManager.setExact(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent); // 解决set()在api19上不准时问题        } else {            mAlarmManager.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent);        }    }}

只需要在程序启动的时候调用即可，还需要添加日志保存的目录

 CrashHandler crashHandler = CrashHandler.getInstance();        crashHandler.init(this);

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