Android中的异常处理 CrashHandler
android中如果出现未捕获异常就会让应用程序crash掉，给用户的提示仅仅是该应用已崩溃，很不友好，自己定义一个UncaughtExceptionHanlder来捕获UI线程上的Exception，使用AlertDialog的方式展示出来，可以方便测试，也可以提升用户体验

package com.tcl.navigator.common;import java.lang.Thread.UncaughtExceptionHandler;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.os.Looper;import android.util.Log;/** *  * @author peizc 2012-11-23 * 默认处理机制 */public class CrashHandler implements UncaughtExceptionHandler {private static final String FLAG = "CrashHandler";private Context mContext;private static CrashHandler INSTANCE = new CrashHandler();private Thread.UncaughtExceptionHandler mDefaultHandler;public static CrashHandler getInstance() {return INSTANCE;}public void init(Context ctx) {mContext = ctx;mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();Thread.setDefaultUncaughtExceptionHandler(this);}@Overridepublic void uncaughtException(Thread thread, final Throwable ex) {// TODO Auto-generated method stubLog.e(FLAG, ex.toString());new Thread() {public void run() {Looper.prepare();new AlertDialog.Builder(mContext).setTitle("提示").setCancelable(false).setMessage("Error...\n" + ex.toString()).setNeutralButton("I know",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubex.printStackTrace();System.exit(0);  }}).create().show();Looper.loop();};}.start();}}