CrashHandler 异常事件处理

捕获异常：

import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.Thread.UncaughtExceptionHandler;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Map;import android.app.Activity;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;/** * 异常事件处理工具类 * UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告. *  * CrashHandler crashHandler = CrashHandler.getInstance(); * crashHandler.init(getApplicationContext()); *  */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");    /** 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     * 建议在application初始     * @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());            try {                Activity curActivity = getGlobleActivity();                if (curActivity != null)                    curActivity.finish();            } catch (ClassNotFoundException e) {                e.printStackTrace();            } catch (IllegalArgumentException e) {                e.printStackTrace();            } catch (SecurityException e) {                e.printStackTrace();            } catch (IllegalAccessException e) {                e.printStackTrace();            } catch (InvocationTargetException e) {                e.printStackTrace();            } catch (NoSuchMethodException e) {                e.printStackTrace();            } catch (NoSuchFieldException e) {                e.printStackTrace();            }            System.exit(1);        }    }    public static Activity getGlobleActivity() throws ClassNotFoundException,    IllegalArgumentException, SecurityException,    IllegalAccessException, InvocationTargetException,    NoSuchMethodException, NoSuchFieldException {        Class activityThreadClass = Class.forName("android.app.ActivityThread");        Object activityThread = activityThreadClass.getMethod(                "currentActivityThread").invoke(null);        Field activitiesField = activityThreadClass                .getDeclaredField("mActivities");        activitiesField.setAccessible(true);        Map activities = (Map) activitiesField.get(activityThread);        for (Object activityRecord : activities.values()) {            Class activityRecordClass = activityRecord.getClass();            Field pausedField = activityRecordClass.getDeclaredField("paused");            pausedField.setAccessible(true);            if (!pausedField.getBoolean(activityRecord)) {                Field activityField = activityRecordClass                        .getDeclaredField("activity");                activityField.setAccessible(true);                Activity activity = (Activity) activityField                        .get(activityRecord);                return activity;            }        }        return null;    }    /**     * 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(final 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();                String msg = ex == null ? "null" : ex.getMessage();                Toast.makeText(mContext, "非常抱歉，程序遇到异常情况退出，我们会尽快处理，并通知您更新。",                        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     *      * @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());                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");        }        if (ex.getStackTrace() != null) {            StackTraceElement[] tEle = ex.getStackTrace();            for (StackTraceElement ele : tEle) {                sb.append(ele.getClassName() + "-line-" + ele.getLineNumber()                        + "\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";            boolean success =saveFile2Storage(fileName, sb                    .toString().getBytes());            return fileName;        } catch (Exception e) {            Log.e(TAG, "an error occured while writing file...", e);        }        return null;    }    /**     * 保存文件到本地     * @param fileName     * @param datas     * @return     */    private static boolean saveFile2Storage(String fileName, byte[] datas) {        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            String dirStr = Environment.getExternalStorageDirectory().getPath()                    + File.separator + "文件名" + File.separator;            File dir = new File(dirStr);            if (!dir.exists()) {                dir.mkdirs();            }            File desFile = new File(dirStr + fileName);            if (desFile.exists()) {                desFile.delete();            }            FileOutputStream fos;            try {                fos = new FileOutputStream(desFile);                fos.write(datas);                fos.close();                return true;            } catch (FileNotFoundException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }        }        return false;    }}