android 全局crash

1. 創建類
   ​​​

   public class CrashHandler implements Thread.UncaughtExceptionHandler {
       private static final String TAG = "CrashHandler";
       private Context mContext;
       private static CrashHandler mInstance;
       private Thread.UncaughtExceptionHandler mDefaultHandler;
       // 用來存儲設備信息和異常信息
       private Map<String, String> mInfo = new HashMap<>();
       private DateFormat mDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   
       private CrashHandler() {}
   
       public static CrashHandler getInstance() {
           if (mInstance == null) {
               synchronized (CrashHandler.class) {
                   if (mInstance == null) {
                       mInstance = new CrashHandler();
                   }
               }
           }
           return mInstance;
       }
   
       public void init(Context context) {
           mContext = context;
           // 獲取系統默認的UncaughtException處理器
           mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
           //設置該CrashHandler爲程序的默認處理器
           Thread.setDefaultUncaughtExceptionHandler(this);
       }
   
       @Override
       public void uncaughtException(Thread t, Throwable e) {
           // 如果用戶沒有處理則讓系統默認的異常處理器來處理
           if (!handleException(e) && mDefaultHandler != null) {
               mDefaultHandler.uncaughtException(t, e);
           } else {
               try {
                   Thread.sleep(3000);
               } catch (InterruptedException e1) {
                   Log.e(TAG, "error", e);
               }
               // 退出程序
               Process.killProcess(Process.myPid());
               System.exit(1);
           }
       }
   
       // 自定義錯誤處理，收集錯誤信息，發送錯誤報告等操作均在此完成.
       private boolean handleException(Throwable e) {
           if (e == null) {
               return false;
           }
           // 使用Toast來顯示異常信息
           new Thread() {
               @Override
               public void run() {
                   Looper.prepare();
                   Toast.makeText(mContext, "很抱歉,程序出現異常,即將退出.", Toast.LENGTH_SHORT).show();
                   Looper.loop();
               }
           }.start();
   
           //收集設備參數信息
           collectErrorInfo();
           //保存日誌文件
           saveErrorInfo(e);
           return true;
       }
   
       // 收集設備參數信息
       private void collectErrorInfo() {
           PackageManager pm = mContext.getPackageManager();
           try {
               PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
               if (pi != null) {
                   String versionName = TextUtils.isEmpty(pi.versionName) ? "未設置版本號" : pi.versionName;
                   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) {
                           Log.e(TAG, "an error occured when collect crash info", e);
                       }
                   }
               }
           } catch (PackageManager.NameNotFoundException e) {
               Log.e(TAG, "an error occured when collect package info", e);
           }
       }
   
       // 保存錯誤信息到文件中
       private void saveErrorInfo(Throwable e) {
           StringBuffer stringBuffer = new StringBuffer();
           for (Map.Entry<String, String> entry : mInfo.entrySet()) {
               String keyName = entry.getKey();
               String value = entry.getKey();
               stringBuffer.append(keyName+"="+value+"\n");
           }
   
           Writer writer = new StringWriter();
           PrintWriter printWriter = new PrintWriter(writer);
           e.printStackTrace(printWriter);
           Throwable cause = e.getCause();
           while (cause != null) {
               cause.printStackTrace(printWriter);
               cause = cause.getCause();
           }
   
           printWriter.close();
   
           String result = writer.toString();
           stringBuffer.append(result);
   
           long currentTime = System.currentTimeMillis();
           String time = mDateFormat.format(new Date());
           String fileName = "crash-" + time + "-" + currentTime + ".log";
   
           // 判斷有沒有SD卡
           if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
               File dir = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/shanghaicrash");
               if (!dir.exists()) {
                   dir.mkdirs();
               }
   
               FileOutputStream fos = null;
               try {
                   fos = new FileOutputStream(dir + "/" + fileName);
                   fos.write(stringBuffer.toString().getBytes());
               } catch (FileNotFoundException e1) {
                   Log.e(TAG, "an error occured due to file not found", e);
               } catch (IOException e2) {
                   Log.e(TAG, "an error occured while writing file...", e);
               } finally {
                   try {
                       fos.close();
                   } catch (IOException e1) {
                       Log.e(TAG, "an error occured when close file", e);
                   }
               }
           }
       }
   }

2. 在application中初始化

   CrashHandler.getInstance().init(this);

3. 在設定的位置查看log