未捕获异常处理类

项目中的未捕获异常处理类 记录一下 方便以后使用

package com.example.****.******;

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.util.Log;


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.util.HashMap;
import java.util.Map;

/**
 * 未捕获异常处理类
 *
 */
public class CrashHandler implements UncaughtExceptionHandler {
    public static final String TAG = "CrashHandler";
    //异常文件夹名
    private static String CommonAPP_DIR="/errApp";
    //异常文件名
    private static String LOGNAME="/errClass.text";

    // 系统默认的UncaughtException处理类
    private 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>();

    /** 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;
    }

    /**
     * 获得手机信息
     */
    public Map<String, String> phoneInfo() {
        if (infos.size() == 0) {
            collectDeviceInfo(mContext);
        }
        return infos;
    }

    /**
     * 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 {
            //MobclickAgent.onKillProcess(mContext);

            System.exit(0);
            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;
        }
        // 收集设备参数信息
        collectDeviceInfo(mContext);
        // 保存日志文件
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     * 获取应用目录路径
     *
     * @return
     */
    public static String getSaveDir() {
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            return Environment.getExternalStorageDirectory() + CommonAPP_DIR;
        }
        return Environment.getDataDirectory().getAbsolutePath()
                + CommonAPP_DIR;
    }
    /**
     * 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());
                // LogUtils.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) {
        StringBuilder sb = new StringBuilder();
        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);
        System.out.println(sb);
        writeLog(sb.toString(), CrashHandler.LOGNAME, false);
        return CrashHandler.LOGNAME;
    }

    /**
     * 写入日志
     */
    public static void writeLog(String log, String fileName, boolean bl) {
        FileOutputStream fos=null;
        try {
            String time = "2019-01-22";
            log = time + ":" + log + "\r\n";
            if (isSDCardExist()) {
                File dir = new File(getSaveDir());
                if (!dir.exists()) {
                    dir.mkdirs();
                }
                fos= new FileOutputStream(getSaveDir()
                        + fileName, bl);
                fos.write(log.getBytes());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
               if (fos!=null){fos.close();}
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 是否存在SD卡
     *
     * @return
     */
    public static boolean isSDCardExist() {

        boolean sdCardExist = Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED);

     return sdCardExist;
    }



}