使用CrashHandler来获取应用的crash信息

Android应用不可避免的会发生crash，也称之为崩溃，无论你的程序写得多么完美，总是无法完全避免crash的发生，可能是由于Android系统底层的bug，也可能是由于不充分的机型适配或者是糟糕的网络状况。当crash发生时，系统会kill掉正在执行的程序，这对于用户来说是很不友好的，也是开发者所不愿意看到的。更糟糕的是，当发生了crash，开发者却无法得知程序为何crash。幸运的是，Android提供了处理这类问题的方法。下面是一个比较常用的异常捕获方式：

首先写一个类继承UncaughtExceptionHandler，采用okhttp方式上传

/** * Created by hel on 2017/12/5. */public class CrashHandler implements Thread.UncaughtExceptionHandler {    private static final String TAG = "CrashHandler";    private static final boolean DEBUG = true;    private final String PATH = Environment.getExternalStorageDirectory().getPath() + "/CrashTest/log/";    private final String FILE_NAME = "crash";    private final String FILE_NAME_SUFFIX = ".trace";    private static CrashHandler mInstance = new CrashHandler();    private Thread.UncaughtExceptionHandler mDefaultCrashHandler;    private Context mContext;    private File file;    private CrashHandler() {    }    public static CrashHandler getInstance() {        return mInstance;    }    public void init(Context context) {        mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(this);        mContext = context.getApplicationContext();        Log.e(TAG, "init: " + "初始化CrashHandler");    }    /**     * 当程序发生未捕获的异常时，执行这里     * @param t     * @param e     */    @Override    public void uncaughtException(Thread t, Throwable e) {        Log.e(TAG, "uncaughtException: " + "执行崩溃日志");        try {            dumpExceptionToSDCard(e);            uploadExceptionToService(e);        } catch (IOException e1) {            e1.printStackTrace();        }        e.printStackTrace();        if (mDefaultCrashHandler != null) {            mDefaultCrashHandler.uncaughtException(t, e);        } else {            Process.killProcess(Process.myPid());        }    }    /**     * 将异常信息以及手机软件等相关信息保存到本地     * @param e     * @throws IOException     */    private void dumpExceptionToSDCard(Throwable e) throws IOException {        if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {            if (DEBUG) {                Log.w(TAG, "sdcard unmounted,skip dump exception");                return;            }        }        File dir = new File(PATH);        if (!dir.exists()) {            dir.mkdirs();        }        long current = System.currentTimeMillis();        String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(current));        file = new File(PATH + FILE_NAME + time + FILE_NAME_SUFFIX);        try {            PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));            pw.println(time);            dumpPhoneInfo(pw);            pw.println();            e.printStackTrace(pw);            Log.e(TAG, "写入文件成功: " + file.getPath());            pw.close();        } catch (Exception e1) {            Log.e(TAG, "dump crash info failed" + e1);        }    }    private void dumpPhoneInfo(PrintWriter pw) throws PackageManager.NameNotFoundException {        PackageManager pm = mContext.getPackageManager();        PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);        pw.print("App Version:");        pw.print(pi.versionName);        pw.print('_');        pw.print(pi.versionCode);        //Android版本号        pw.print("OS Verson:");        pw.print(Build.VERSION.RELEASE);        pw.print("_");        pw.print(Build.VERSION.SDK_INT);        //手机制造商        pw.print("Vendor:");        pw.print(Build.MANUFACTURER);        //手机型号        pw.print("Model:");        pw.print(Build.MODEL);        //CPU架构        pw.print("CPU ABI:");        pw.print(Build.CPU_ABI);    }    /**     * 将异常信息发送到服务器     * @param e     * @throws IOException     */    private void uploadExceptionToService(Throwable e) throws IOException {        Log.e(TAG, "开始上传文件: "+file.length()+"");        OkHttpClient mOkHttpClient = new OkHttpClient();        Request request = new Request.Builder()                .url("https://...")                .post(RequestBody.create(MediaType.parse("text/x-markdown; charset=utf-8"), file))                .build();        Call call = mOkHttpClient.newCall(request);        call.enqueue(new Callback() {            @Override            public void onFailure(Call call, IOException e) {                Log.e(TAG, "上传失败"+e);            }            @Override            public void onResponse(Call call, Response response) throws IOException {                Log.e(TAG, response.body().string());            }        });    }}

使用方法，在application中初始化

/** * Created by hel on 2017/12/5. */public class MyApp extends Application {    @Override    public void onCreate() {        super.onCreate();        CrashHandler crashHandler = CrashHandler.getInstance();        crashHandler.init(this);    }}

测试：（点击按钮抛出异常）

deleteFile.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {        throw new RuntimeException("自定义异常");    }});

测试结果：