【Android】使用UncaughtExceptionHandler捕获全局异常

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简介

当程序崩溃（Crash）的时候，默认是不对异常信息做处理的。如果想要把异常信息保存到本地文件中，或上传的服务器。那么就要借助UncaughtExceptionHandler这个类。

使用方法

一、实例化

public class CrashLogCatch {public static final String THREAD_NAME_MAIN = "com.example.ABC";   //主线程名称public static final String THREAD_NAME_REMOTE = "com.example.ABC:remote_service";public static void initCrashLog(final Context context) {final Thread.UncaughtExceptionHandler oriHandler = Thread.getDefaultUncaughtExceptionHandler();Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {public void uncaughtException(Thread thread, Throwable e) {try {StringBuilder buffer = new StringBuilder();buffer.append(getCurProcessName(context) + "\n");buffer.append("uncaught exception at ").append(new Date(System.currentTimeMillis())).append("\n");buffer.append(ExceptionUtils.formatException(e));String log = HttpLogController.getInstance().makeCrashLog(buffer.toString());//发送崩溃日志sendExceptionLog(log);SdLog.dFileAlways("crash" + System.currentTimeMillis() + ".log", log);if (Global.DEBUG) {oriHandler.uncaughtException(thread, e);  //debug模式，默认抛出异常} else {String threadName = thread.getName();if (threadName.equals(THREAD_NAME_REMOTE)) {android.os.Process.killProcess(android.os.Process.myPid());  //如果是service直接kill掉} else if (threadName.equals(THREAD_NAME_MAIN)) {oriHandler.uncaughtException(thread, e);  //如果是主线程，抛出异常}}} catch (Exception ex) {}}});}/*** 获取当前进程名*/private static String getCurProcessName(Context context) {try {int pid = android.os.Process.myPid();ActivityManager mActivityManager = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);for (ActivityManager.RunningAppProcessInfo appProcess : mActivityManager.getRunningAppProcesses()) {if (appProcess.pid == pid){return appProcess.processName;}} } catch (Exception e) {e.printStackTrace();}return "";}/*** 发送崩溃日志*/private static void sendExceptionLog(String log) {try {JSONObject jsonObject = new JSONObject(log);Iterator keyIter = jsonObject.keys();String key;Object value;HashMap<String, Object> valueMap = new HashMap<String, Object>();while (keyIter.hasNext()) {key = (String) keyIter.next();value = jsonObject.get(key);valueMap.put(key, value);}// 把异常信息发送到服务器 ComponentHolder.getLogController().sendLog(valueMap, LogType.EXCEPTION);} catch (JSONException e) {e.printStackTrace();}}
}

二、调用

1、对于整个Application

只要在指定的Application类的onCreate()回调中，把UncaughtExceptionHandler和Application的实例绑定在一起就可以了。关键代码如下：

public class MyApplication extends Application {@Overridepublic void onCreate() {CrashLogCatch.initCrashLog(this);   //注意这里super.onCreate();}
}

这样，如果程序崩溃，错误日志就会被上传到服务器。

2、绑定Service 实例

public class MyService extends Service {@Overridepublic void onCreate() {Thread.currentThread().setName(CrashLogCatch.THREAD_NAME_REMOTE);  //线程名称CrashLogCatch.initCrashLog(this);   //注意这里}
}

3、绑定BroadcastReceiver实例

public class LaunchReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {Thread.currentThread().setName(CrashLogCatch.THREAD_NAME_REMOTE);  //线程名称CrashLogCatch.initCrashLog(context);   //注意这里}
}