public classCrashHandlerimplementsUncaughtExceptionHandler {
public static finalStringTAG="CrashHandler";
//系统默认的UncaughtException处理类
privateUncaughtExceptionHandlermDefaultHandler;
//CrashHandler实例
private staticCrashHandlerINSTANCE=newCrashHandler();
//程序的Context对象
privateContextmContext;
//用来存储设备信息和异常信息
privateMap<String,String>infos=newHashMap<String,String>();
//用于格式化日期,作为日志文件名的一部分
private Date Format 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
*
*@paramcontext
*/
public voidinit(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 voiduncaughtException(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) {
Log.e(TAG,"error : ", e);
}
//退出程序
Process.killProcess(Process.myPid());
System.exit(1);
}
}
/**
* 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.
*
*@paramex
*@returntrue:如果处理了该异常信息;否则返回false.
*/
private booleanhandleException(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
*@paramctx
*/
public voidcollectDeviceInfo(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
*
*@paramex
*@return返回文件名称,便于将文件传送到服务器
*/
privateString saveCrashInfo2File(Throwable ex) {
StringBuffer sb =newStringBuffer();
for(Map.Entry entry :infos.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
sb.append(key +"="+ value +"\n");
}
Writer writer =newStringWriter();
PrintWriter printWriter =newPrintWriter(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{
longtimestamp = System.currentTimeMillis();
String time =formatter.format(newDate());
String fileName ="crash-"+ time +"-"+ timestamp +".log";
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
String path ="/sdcard/crash/";
File dir =newFile(path);
if(!dir.exists()) {
dir.mkdirs();
}
FileOutputStream fos =newFileOutputStream(path + fileName);
fos.write(sb.toString().getBytes());
fos.close();
}
returnfileName;
}catch(Exception e) {
Log.e(TAG,"an error occured while writing file...", e);
}
return null;
}
}
