【Android】使用UncaughtExceptionHandler捕获全局异常

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

参考资料

1、【移动开发】捕获异常信息_UncaughtExceptionHandler

2、Android使用UncaughtExceptionHandler捕获全局异常