android错误处理发送消息给服务器_Android

android异常处理发送消息给服务器

转自：http://www.cnblogs.com/stay/archive/2011/07/21/2113167.html

程序员最头疼的事情就是bug和debug。这次debug长达20天，搞的我心力交瘁。累，因为Android兼容性，不同手机会有不同的bug出来，而且很难复现，所以就上网找了下类似保存错误log到文件再上传到服务器，现把源码也共享出来。上传至服务器的代码我没加。相信大家都有现成的代码了。

先讲下原理，跟JavaEE的自定义异常捕获一样，将错误一直向上抛，然后在最上层统一处理。这里就可以获得Exception Message，进行保存操作

异常捕获类如下：

view sourceprint?
/** 
?* @author Stay 
?*????? 在Application中统一捕获异常，保存到文件中下次再打开时上传 
?*/
public class CrashHandler implements UncaughtExceptionHandler {?? 
????/** 是否开启日志输出,在Debug状态下开启,? 
?????* 在Release状态下关闭以提示程序性能? 
?????* */??
????public static final boolean DEBUG = true;?? 
????/** 系统默认的UncaughtException处理类 */??
????private Thread.UncaughtExceptionHandler mDefaultHandler;?? 
????/** CrashHandler实例 */??
????private static CrashHandler INSTANCE;?? 
????/** 程序的Context对象 */??
//??? private Context mContext;?? 
????/** 保证只有一个CrashHandler实例 */??
????private CrashHandler() {}?? 
????/** 获取CrashHandler实例 ,单例模式*/??
????public static CrashHandler getInstance() {?? 
????????if (INSTANCE == null) {?? 
????????????INSTANCE = new CrashHandler();?? 
????????}?? 
????????return INSTANCE;?? 
????}?? 
????
????/**? 
?????* 初始化,注册Context对象,? 
?????* 获取系统默认的UncaughtException处理器,? 
?????* 设置该CrashHandler为程序的默认处理器? 
?????*?? 
?????* @param ctx? 
?????*/??
????public void init(Context ctx) {?? 
//??????? mContext = ctx;?? 
????????mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();?? 
????????Thread.setDefaultUncaughtExceptionHandler(this);?? 
????}?? 
????
????/**? 
?????* 当UncaughtException发生时会转入该函数来处理? 
?????*/??
????@Override??
????public 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);?? 
????????} else {? //如果自己处理了异常，则不会弹出错误对话框，则需要手动退出app 
????????????try {?? 
????????????????Thread.sleep(3000);?? 
????????????} catch (InterruptedException e) {?? 
????????????}?? 
????????????android.os.Process.killProcess(android.os.Process.myPid());?? 
????????????System.exit(10);?? 
????????}?? 
????}?? 
????
????/**? 
?????* 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.? 
?????* 开发者可以根据自己的情况来自定义异常处理逻辑? 
?????* @return? 
?????* true代表处理该异常，不再向上抛异常， 
?????* false代表不处理该异常(可以将该log信息存储起来)然后交给上层(这里就到了系统的异常处理)去处理， 
?????* 简单来说就是true不会弹出那个错误提示框，false就会弹出 
?????*/??
????private boolean handleException(final Throwable ex) {?? 
????????if (ex == null) {?? 
????????????return false;?? 
????????}?? 
//??????? final String msg = ex.getLocalizedMessage();?? 
????????final StackTraceElement[] stack = ex.getStackTrace(); 
????????final String message = ex.getMessage(); 
????????//使用Toast来显示异常信息?? 
????????new Thread() {?? 
????????????@Override??
????????????public void run() {?? 
????????????????Looper.prepare();?? 
//??????????????? Toast.makeText(mContext, "程序出错啦:" + message, Toast.LENGTH_LONG).show();?? 
//??????????????? 可以只创建一个文件，以后全部往里面append然后发送，这样就会有重复的信息，个人不推荐 
????????????????String fileName = "crash-" + System.currentTimeMillis()? + ".log";?? 
????????????????File file = new File(Environment.getExternalStorageDirectory(), fileName); 
????????????????try { 
????????????????????FileOutputStream fos = new FileOutputStream(file,true); 
????????????????????fos.write(message.getBytes()); 
????????????????????for (int i = 0; i < stack.length; i++) { 
????????????????????????fos.write(stack[i].toString().getBytes()); 
????????????????????} 
????????????????????fos.flush(); 
????????????????????fos.close(); 
????????????????} catch (Exception e) { 
????????????????} 
????????????????Looper.loop();?? 
????????????}?? 
????
????????}.start();?? 
????????return false;?? 
????}?? 
????
????// TODO 使用HTTP Post 发送错误报告到服务器? 这里不再赘述 
//??? private void postReport(File file) {?? 
//????? 在上传的时候还可以将该app的version，该手机的机型等信息一并发送的服务器， 
//????? Android的兼容性众所周知，所以可能错误不是每个手机都会报错，还是有针对性的去debug比较好 
//??? }?? 
}

在Application onCreate时就注册ExceptionHandler，此后只要程序在抛异常后就能捕获到。

view sourceprint?
public class App extends Application{ 
????????@Override??
????????public void onCreate() {?? 
????????????super.onCreate();?? 
????????????CrashHandler crashHandler = CrashHandler.getInstance();?? 
????????????//注册crashHandler?? 
????????????crashHandler.init(getApplicationContext());?? 
????????}?? 
}

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public class LogActivity extends Activity { 
????@Override
????public void onCreate(Bundle savedInstanceState) { 
????????super.onCreate(savedInstanceState); 
????????setContentView(R.layout.main); 
????????try {//制造bug 
????????????File file = new File(Environment.getExternalStorageState() ,"crash.bin"); 
????????????FileInputStream fis = new FileInputStream(file); 
????????????byte[] buffer = new byte[1024]; 
????????????fis.read(buffer); 
????????} catch (Exception e) { 
????????????//这里不能再向上抛异常，如果想要将log信息保存起来，则抛出runtime异常， 
//????????? 让自定义的handler来捕获，统一将文件保存起来上传 
????????????throw new RuntimeException(e); 
????????} 
????} 
}

注意，如果catch后不throw就默认是自己处理了，ExceptionHandler不会捕获异常了。

再分享一个Log的封装类，只要在这里设置DEBUG的值就能让控制台是否打印出log

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public class DebugUtil { 
????public static final String TAG = "ICON"; 
????public static final boolean DEBUG = true; 
??????
????public static void toast(Context context,String content){ 
????????Toast.makeText(context, content, Toast.LENGTH_SHORT).show(); 
????} 
??????
????public static void debug(String tag,String msg){ 
????????if (DEBUG) { 
????????????Log.d(tag, msg); 
????????} 
????} 
??????
????public static void debug(String msg){ 
????????if (DEBUG) { 
????????????Log.d(TAG, msg); 
????????} 
????} 
??????
????public static void error(String tag,String error){ 
????????Log.e(tag, error); 
????} 
??????
????public static void error(String error){ 
????????Log.e(TAG, error); 
????} 
}