[置顶] Android之异常处理：CrashHandler–异常处理

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);
 }

 @Override
 public void uncaughtException(Thread thread, final Throwable ex) {
  // TODO Auto-generated method stub
  Log.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() {
       @Override
       public void onClick(DialogInterface dialog, int which) {
        // TODO Auto-generated method stub
        ex.printStackTrace();
        System.exit(0);
       }
      }).create().show();
    Looper.loop();
   };

  }.start();
 }

}