全局异常捕获处理器

记得在Mapplication类中初始化

 CrashHandler.getintence.init(this).

package com.bwei.xme.exception;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;


import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.os.Process;
import android.util.Log;
import android.widget.Toast;


import com.bwei.xme.MainActivity;


import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;


/**
 * UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
 * 
 * @author user
 * 
 */
public class CrashHandler implements UncaughtExceptionHandler {

public static final String TAG = "CrashHandler";

//系统默认的UncaughtException处理类 
private Thread.UncaughtExceptionHandler mDefaultHandler;
//CrashHandler实例
private static CrashHandler INSTANCE = new CrashHandler();
//程序的Context对象
private Context mContext;
//用来存储设备信息和异常信息
private Map<String, String> infos = new HashMap<String, String>();


//用于格式化日期,作为日志文件名的一部分
private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");


/** 保证只有一个CrashHandler实例 */
private CrashHandler() {
}


/** 获取CrashHandler实例 ,单例模式 */
public static CrashHandler getInstance() {
return INSTANCE;
}


/**
* 初始化
* 
* @param context
*/
public void init(Context context) {
mContext = context;
//获取系统默认的UncaughtException处理器
mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
//设置该CrashHandler为程序的默认处理器
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 {


//退出程序










//第一种方法
//
// Intent intent = new Intent(mContext, ReportActivity.class);
// intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// mContext.startActivity(intent);
//
// Process.killProcess(Process.myPid());




//第二种方法
// Intent intent = new Intent(mContext, MainActivity.class);
// intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// mContext.startActivity(intent);
// android.os.Process.killProcess(android.os.Process.myPid());


}
}


/**
* 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.
* 
* @param ex
* @return true:如果处理了该异常信息;否则返回false.
*/
private boolean handleException(Throwable ex) {
if (ex == null) {
return false;
}
// 使用Toast来显示异常信息
// new Thread() {
// @Override
// public void run() {
// Looper.prepare();
// Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出.", Toast.LENGTH_LONG).show();
// Looper.loop();
// }
// }.start();
//收集设备参数信息 
collectDeviceInfo(mContext);
//保存日志文件 
saveCrashInfo2File(ex);


return true;
}

/**
* 收集设备参数信息
* @param ctx
*/
public void collectDeviceInfo(Context ctx) {
try {
PackageManager pm = ctx.getPackageManager();
PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
if (pi != null) {
String versionName = pi.versionName == null ? "null" : pi.versionName;
String versionCode = pi.versionCode + "";
infos.put("versionName", versionName);
infos.put("versionCode", versionCode);
}
} catch (NameNotFoundException e) {
Log.e(TAG, "an error occured when collect package info", e);
}
Field[] fields = Build.class.getDeclaredFields();
for (Field field : fields) {
try {
field.setAccessible(true);
infos.put(field.getName(), field.get(null).toString());
Log.d(TAG, field.getName() + " : " + field.get(null));
} catch (Exception e) {
Log.e(TAG, "an error occured when collect crash info", e);
}
}
}


/**
* 保存错误信息到文件中
* 
* @param ex
* @return 返回文件名称,便于将文件传送到服务器
*/
private String saveCrashInfo2File(Throwable ex) {

StringBuffer sb = new StringBuffer();
for (Map.Entry<String, String> entry : infos.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
sb.append(key + "=" + value + "\n");
}
sb.append(ex.getMessage());
System.out.println("sb = " + sb.toString());
//
// Writer writer = new StringWriter();
// PrintWriter printWriter = new PrintWriter(writer);
// ex.printStackTrace(printWriter);
// Throwable cause = ex.getCause();
// while (cause != null) {
// cause.printStackTrace(printWriter);
// cause = cause.getCause();
// }
// printWriter.close();
// String result = writer.toString();
// sb.append(result);
// try {
// long timestamp = System.currentTimeMillis();
// String time = formatter.format(new Date());
// String fileName = "crash-" + time + "-" + timestamp + ".log";
// if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
// String path = "/sdcard/crash/";
// File dir = new File(path);
// if (!dir.exists()) {
// dir.mkdirs();
// }
// FileOutputStream fos = new FileOutputStream(path + fileName);
// fos.write(sb.toString().getBytes());
// fos.close();
// }
// return fileName;
// } catch (Exception e) {
// Log.e(TAG, "an error occured while writing file...", e);
// }
return null;
}
}