Android开发，崩溃信息收集

由于需求，公司需要收集程序崩溃，异常退出等信息，然后上网查需资料，写了一个CrashHadler类，只要在程序入口初始化此类就能收集崩溃信息，需要的朋友们可以看一下，崩溃信息收集保存在crash文件夹下，以时间命名

public class CrashHandler implements Thread.UncaughtExceptionHandler {
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    private Context mContext;

    /*储存异常参数的信息*/
    private Map<String, String> paramsMap = new HashMap<>();
    private SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");

    private String TAG = this.getClass().getSimpleName();
    private static CrashHandler mInstance;

    private CrashHandler() {

    }

    public static synchronized CrashHandler getInstance() {
        if (mInstance == null) {
            mInstance = new CrashHandler();
        }
        return mInstance;
    }

    public void init(Context context) {
        mContext = context;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);//设置为系统默认的CrashHandler
    }


    /**
     * uncaughtException 回调函数
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if(!handleException(ex) && mDefaultHandler != null){
            mDefaultHandler.uncaughtException(thread,ex);
        }else {
            try {
                Thread.sleep(3000);//// 如果处理了，让程序继续运行3秒再退出，保证文件保存并上传到服务器
            } catch (InterruptedException e) {
                Log.e(TAG,"error : ",e);
            }
            //退出程序,4.4即以上系统使用该方法杀进程的时候app会重启,类似内存不足app挂了系统发广播拉起app的那种情况
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);//非正常退出程序
        }
    }

    /**
     * 收集错误信息，发送到服务器
     * @param ex
     * @return 处理了异常返回 true, 否则false
     */
    private boolean handleException(Throwable ex){
        if(ex == null){
            return false;
        }
        collectDeviceInfo(mContext);
        addCustomInfo();
        new Thread(){
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext, "程序出现异常，即将退出", Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        saveCrashInfo2File(ex);
        return true;
    }

    /**
     *  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 : paramsMap.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();
        //循环着把所有的异常信息写入writer中
        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 = format.format(new Date());
            String fileName = "crash-"+time+"-"+timestamp+".log";
            if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
                String path = Environment.getExternalStorageDirectory().getAbsolutePath()+"/crash/";
               // Log.i("rjx", "saveCrashInfo2File: "+path);
                File dir = new File(path);
                if(!dir.exists()){
                    dir.mkdirs();
                }
                FileOutputStream fos = new FileOutputStream(path+fileName);
                fos.write(sb.toString().getBytes());
                fos.close();
            }
            return  fileName;
        }catch (Exception e){
            Log.e(TAG, "an error occured while writing file...", e);
        }
        return  null;
    }

    /**
     * 添加自定义参数
     */
    private void addCustomInfo() {
    }

    private void collectDeviceInfo(Context mContext) {
        try {
            PackageManager pm = mContext.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
            if(pi != null){
                String versionName = pi.versionName == null ? "null" : pi.versionName;
                String versionCode = pi.versionCode + "";
                paramsMap.put("versionName",versionName);
                paramsMap.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);
                paramsMap.put(field.getName(),field.get(null).toString());//都是静态字段，可以传null
            } catch (IllegalAccessException e) {
                Log.e(TAG, "an error occured when collect crash info", e);
            }
        }
    }
}

因为涉及到写文件，需要在AndroidManifest里面加入

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

如果手机系统6.0异常，需要动态申请：

    if (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            //Android 6.0申请权限
            ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},1);
        }else{
            Log.i("权限","权限申请ok");
        }

到此大功告成！

如有错，请纠正，谢谢