【Android实战】Android中处理崩溃异常

public class MainActivity extends ActionBarActivity {public CrashApplication application;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);application = (CrashApplication) getApplication();application.addAct(this);Button button = null;button.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stub}});}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}

public class CrashApplication extends Application {List<Activity> activityList = new ArrayList<Activity>();@Overridepublic void onCreate() {super.onCreate();CrashHandler crashHandler = CrashHandler.getInstance();crashHandler.init(getApplicationContext());}public void addAct(Activity a) {activityList.add(a);}public void delAct(Activity a) {activityList.remove(a);}public void finishActs() {for (Activity a : activityList) {if (null != a) {a.finish();}}android.os.Process.killProcess(android.os.Process.myPid());}}

public class CrashHandler implements UncaughtExceptionHandler {public static final String TAG = "CrashHandler";// 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<String, String> infos = new HashMap<String, String>();// 用于格式化日期,作为日志文件名的一部分private SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");/** 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 */@Overridepublic 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);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);} else {try {Thread.sleep(3000);} catch (InterruptedException e) {Log.e(TAG, "error : ", e);}// 退出程序((CrashApplication) mContext).finishActs();};}/** * 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() {@Overridepublic void run() {Looper.prepare();Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();Looper.loop();}}.start();// 收集设备参数信息collectDeviceInfo(mContext);// 保存日志文件saveCrashInfo2File(ex);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);}} catch (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();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;}}

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