判断程序错误自动写入文件夹0703

来源：互联网发布：女人被强奸知乎编辑：程序博客网时间：2024/06/06 08:48
注意 此方法必须在Application类里面注册@Overridepublic void onCreate() {    super.onCreate();    CrashHandler.getInstance().init(this);}


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.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.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;public class CrashHandler implements UncaughtExceptionHandler {        public static final String TAG = "CrashHandler";        //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();    //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");        private CrashHandler() {    }        public static CrashHandler getInstance() {        return INSTANCE;    }        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);    }        @Override    public void uncaughtException(Thread thread, Throwable ex) {        System.out.println("thread = " + thread);        System.out.println("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);////            //杀掉当前进程//            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());        }    }        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;    }            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);            }        }    }        private String saveCrashInfo2File(Throwable ex) {                StringBuffer sb = new StringBuffer();        for (Map.Entry entry: infos.entrySet()) {            String key = (String) entry.getKey();            String value = (String) entry.getValue();            sb.append(key + "=" + value + "\n");        }sb.append(ex.getLocalizedMessage());        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();            }            System.out.println("fileName = " + fileName);            return fileName;        } catch (Exception e) {            Log.e(TAG, "an error occured while writing file...", e);        }        return null;    }}
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