public class CrashHandler implements Thread.UncaughtExceptionHandler {

    public static final String TAG = "CrashHandler";

    // 系統預設的UncaughtException處理類
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    // CrashHandler例項
    private static CrashHandler INSTANCE = new CrashHandler();
    // 程式的Context物件
    private Context mContext;
    // 用來儲存裝置資訊和異常資訊
    private Map<String, String> infos = new HashMap<String, String>();

    // 用於格式化日期,作為日誌檔名的一部分
    private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss SSS");

    private CrashHandler() {
    }

    /** 獲取CrashHandler例項 ,單例模式 */
    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    /**
     * 初始化
     *
     * @param context
     */
    public void init(Context context) {
        mContext = context;
        // 獲取系統預設的UncaughtException處理器
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        // 設定該CrashHandler為程式的預設處理器
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 當UncaughtException發生時會轉入該函式來處理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            // 如果使用者沒有處理則讓系統預設的異常處理器來處理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                Log.e(TAG, "error : ", e);
            }
            // 退出程式
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);
        }
    }

    /**
     * 自定義錯誤處理,收集錯誤資訊 傳送錯誤報告等操作均在此完成.
     *
     * @param ex
     * @return true:如果處理了該異常資訊;否則返回false.
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        // 使用Toast來顯示異常資訊
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "很抱歉,程式出現異常即將退出.", Toast.LENGTH_LONG).show();
                Looper.loop();
            }
        }.start();
        Log.e(TAG, "handleException: "+ex.getMessage());
        // 收集裝置引數資訊
        collectDeviceInfo(mContext);
        // 儲存日誌檔案
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 收集裝置引數資訊
     *
     * @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);
            }
        }
    }

    /**
     * 儲存錯誤資訊到檔案中
     * 也可以在這裡去將錯誤資訊上傳給後臺的介面
     * @param ex
     * @return 返回檔名稱,便於將檔案傳送到伺服器
     */
    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 {
            String time = formatter.format(new Date());
            String fileName = time + ".txt";
            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                String path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/CrashCollection/";
                File dir = new File(path);
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                File file = new File(dir , fileName);
                if (!file.exists()){
                    file.createNewFile();
                }
                FileOutputStream fos = new FileOutputStream(file);
                fos.write(sb.toString().getBytes("UTF-8"));
                fos.close();
            }
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing file...", e);
        }
        return null;
    }
}
 

在saveCrashInfo2File(Throwable ex)函式中將錯誤資訊寫入了手機內部，當然也可以在這裡去進行介面的呼叫，上傳錯誤資訊

在application中需要對該類進行初始化：

CrashHandler crashHandler = CrashHandler.getInstance();

crashHandler.init(this);