UncaughtException處理類,當程序發生Uncaught異常的時候,有該類來接管程序,并記錄發送錯誤報告.
1.java文件

public class CrashHandler implements Thread.UncaughtExceptionHandler {public static final String TAG = "CrashHandler";// CrashHandler 實例private static CrashHandler INSTANCE = new CrashHandler();// 程序的 Context 對象private Context mContext;// 系統默認的 UncaughtException 處理類private Thread.UncaughtExceptionHandler mDefaultHandler;// 用來存儲設備信息和異常信息private Map<String, String> infos = new HashMap<String, String>();// 用于格式化日期,作為日志文件名的一部分private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");/** 保證只有一個 CrashHandler 實例 */private CrashHandler() {}/** 獲取 CrashHandler 實例 ,單例模式 */public static CrashHandler getInstance() {return INSTANCE;}/*** 初始化** @param context*/public void init(Context context) {mContext = context;// 獲取系統默認的 UncaughtException 處理器mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();// 設置該 CrashHandler 為程序的默認處理器Thread.setDefaultUncaughtExceptionHandler(this);}/*** 當 UncaughtException 發生時會轉入該函數來處理*/@Overridepublic void uncaughtException(Thread thread, Throwable ex) {if (!handleException(ex) && mDefaultHandler != null) {// 如果用戶沒有處理則讓系統默認的異常處理器來處理mDefaultHandler.uncaughtException(thread, ex);} else {try {Thread.sleep(2000);} catch (InterruptedException e) {Log.e(TAG, "error : ", e);}//捕獲異常后退出整個應用程序App.application.RemoveActivity();// 結束線程，一般與移除所有Activity配合使用android.os.Process.killProcess(android.os.Process.myPid());// System.exit(0);}}/*** 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** @param ex* @return true：如果處理了該異常信息；否則返回 false*/private boolean handleException(Throwable ex) {if (ex == null) {return false;}// 使用 Toast 來顯示異常信息new Thread() {@Overridepublic void run() {Looper.prepare();Toast.makeText(mContext, "很抱歉，程序出現異常，即將退出。", Toast.LENGTH_LONG).show();Looper.loop();}}.start();// 收集設備參數信息collectDeviceInfo(mContext);// 保存日志文件saveCrashInfo2File(ex);return true;}/*** 收集設備參數信息* @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);}}}/*** 保存錯誤信息到文件中** @param ex* @return 返回文件名稱,便于將文件傳送到服務器*/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.定義自己的application類，進行異常處理CrashHandler 初始化

public class App extends Application {/*** 全局Application，方便調用*/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);}/*** 清空退款任務棧，需要在開啟每一個activity之后把其加入到list_activity集合中*/public static void RemoveActivity(){if(!list_activity.isEmpty()){//list集合不為空，移除activityfor(Activity activity: list_activity){activity.finish();}}}}

3.清單文件中聲明自己的application類，添加這句話
android:name=”.自己的application類”

總結

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