import android.content.Context;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.os.Build;

import android.os.Environment;

import android.os.Looper;

import android.util.Log;

import android.widget.Toast;

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;

/**

* Created by 0027008508 on 2016/3/28.

*/

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 SSS");

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 {

try {

Thread.sleep(3000);

} catch (InterruptedException e) {

Log.e(TAG, "error : ", e);

}

// 退出程序

android.os.Process.killProcess(android.os.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.

*

* @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);

ex.printStackTrace();

// 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 (PackageManager.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");

}

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 {

String time = formatter.format(new Date());

String fileName = time + ".txt";

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {

String path = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "logger/crash" + File.separator;

File dir = new File(path);

if (!dir.exists()) {

dir.mkdirs();

}

File file = new File(path,fileName);

if(!file.exists()){

file.createNewFile();

}

FileOutputStream fos = new FileOutputStream(file);

fos.write(sb.toString().getBytes("UTF-8"));

fos.close();

}

return fileName;

} catch (Exception e) {

Log.e(TAG, "an error occured while writing file...", e);

}

return null;

}

}