Android捕捉未捕捉的異常

個人筆記

/**
 * Created by jian on 2017/7/11.
 */

public class CrashHandler implements Thread.UncaughtExceptionHandler {
    private static CrashHandler instance = null;
    private Thread.UncaughtExceptionHandler mDefaultHandler;

    private Map<String, String> mInfo = new HashMap<>();
    //日期格式化
    private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    private CrashHandler() {

    }

    /**
     * 單例模式,懶漢
     *
     * @return
     */
    public static CrashHandler getCrashHandler() {
        if (instance == null) {
            synchronized (CrashHandler.class) {
                if (instance == null) {
                    instance = new CrashHandler();
                }
            }
        }
        return instance;
    }

    private Context mContext;

    /**
     * 初始化
     *
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();//獲得默認的的未被捕捉的異常
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @Override
    public void uncaughtException(Thread t, Throwable e) {
        //收集錯誤信息
        //保存錯誤信息
        //上傳錯誤信息到服務器
        if (!handleException(e)) {
            //未被處理，調用系統默認的處理器處理
            if (mDefaultHandler != null) {
                mDefaultHandler.uncaughtException(t, e);
            } else {
                //已經人爲處理
                try {
                    //休眠一秒鐘後退出
                    Thread.sleep(1000);
                } catch (InterruptedException e1) {
                    e1.printStackTrace();
                }
                Process.killProcess(Process.myPid());
                System.exit(1);
            }
        }
    }

    /**
     * 人爲處理異常
     *
     * @param e
     * @return
     */
    private boolean handleException(Throwable e) {

        if (e == null) {
            return false;
        }
        //toast提示
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "UncaughtException", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();

        //收集錯誤信息
        collectErrorInfo();
        //
        saveErrorInfo(e);
        return false;
    }

    private void saveErrorInfo(Throwable e) {
        StringBuffer stringBuffer = new StringBuffer();
        for (Map.Entry<String, String> entry : mInfo.entrySet()) {
            String keyName = entry.getKey();
            String value = entry.getValue();

            stringBuffer.append(keyName + "=" + value + "\n");//把錯誤信息寫到Buffer中

            Writer writer = new StringWriter();
            PrintWriter printWriter = new PrintWriter(writer);
            e.printStackTrace();
            Throwable cause = e.getCause();

            while (cause != null) {
                cause.printStackTrace(printWriter);
                cause = e.getCause();
            }
            printWriter.close();
            String result = writer.toString();
            stringBuffer.append(result);
            //獲取當前時間
            long cruTime = System.currentTimeMillis();
            //格式化
            String time = dateFormat.format(cruTime);

            String fileName = "crash-" + time + "." + cruTime + ".log";

            //判斷是否有SD卡
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = "/sdcard/crash";
                File dir = new File(path);

                if (!dir.exists()) {
                    dir.mkdirs();

                }
                //錯誤信息寫入SD卡
                FileOutputStream fos = null;
                try {
                    fos = new FileOutputStream(path + fileName);
                    fos.write(stringBuffer.toString().getBytes());
                } catch (FileNotFoundException e1) {
                    e1.printStackTrace();
                } catch (IOException e1) {
                    e1.printStackTrace();
                } finally {
                    try {
                        fos.close();
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }
                }
            }
        }

    }

    private void collectErrorInfo() {
        PackageManager manager = mContext.getPackageManager();
        try {
            PackageInfo pi = manager.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
            if (pi != null) {
                //版本名字
                String versionName = TextUtils.isEmpty(pi.versionName) ? "未設置版本名稱" : pi.versionName;
                //版本號
                String versionCode = pi.versionCode + "";
                mInfo.put("versionName", versionName);
                mInfo.put("versionCode", versionCode);
            }
            Field[] fields = Build.class.getFields();
            if (fields != null && fields.length > 0) {
                for (Field field : fields) {

                    field.setAccessible(true);
                    try {
                        mInfo.put(field.getName(), field.get(null).toString());
                    } catch (IllegalAccessException e) {
                        e.printStackTrace();
                    }
                }

            }
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();

        }

    }
}

在Application中

/**
 * Created by jian on 2017/7/11.
 */

public class CrashApplication extends Application {
    private CrashHandler crashHandler;

    @Override
    public void onCreate() {
        super.onCreate();
        crashHandler = CrashHandler.getCrashHandler();
        crashHandler.init(this);
    }
}