package com.juchao.upg.android.crash;
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.content.Context;
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.util.Log;
import android.widget.Toast;
public class CrashHandler implements UncaughtExceptionHandler {
private static final String TAG=CrashHandler.class.getSimpleName();
//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();
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{
try{
Thread.sleep(3000);
}catch(InterruptedException e){
android.os.Process.killProcess(android.os.Process.myPid());
System.exit(1);
}
}
}
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, "发生异常：\n " +
"程序将退出，错误代码 -101 ", Toast.LENGTH_LONG).show();
Looper.loop();
}
}.start();
//收集设备参数信息
collectDeviceInfo(mContext);
saveCrashInfo2File(ex);
return false;
}
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");
}
}
}
/**
* 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");
}
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=Environment.getExternalStorageDirectory().getAbsolutePath()+"/upg/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;
}
}