Question

我正在尝试在Android中开发登录活动，并且我使用followind方法登录：

private void attemptLogin() {
    /*if (mAuthTask != null) {
        return;
    }*/

    // Reset errors.
    mEmailView.setError(null);
    mPasswordView.setError(null);

    // Store values at the time of the login attempt.
    String email = mEmailView.getText().toString();
    String password = mPasswordView.getText().toString();

    boolean cancel = false;
    View focusView = null;

    // Check for a valid password, if the user entered one.
    if (!TextUtils.isEmpty(password) && !isPasswordValid(password)) {
        mPasswordView.setError(getString(R.string.error_invalid_password));
        focusView = mPasswordView;
        cancel = true;
    }

    // Check for a valid email address.
    if (TextUtils.isEmpty(email)) {
        mEmailView.setError(getString(R.string.error_field_required));
        focusView = mEmailView;
        cancel = true;
    } else if (!isEmailValid(email)) {
        mEmailView.setError(getString(R.string.error_invalid_email));
        focusView = mEmailView;
        cancel = true;
    }

    if (cancel) {
        // There was an error; don't attempt login and focus the first
        // form field with an error.
        focusView.requestFocus();
    } else {
        // Show a progress spinner, and kick off a background task to
        // perform the user login attempt.
        showProgress(true);
        RetrofitAPIService retrofitAPIService = RetrofitAPIService.aRetrofitApiService();
        final Handler handler = new Handler();
        new Thread(new Runnable() {
            @Override
            public void run() {
                /*authService.login(email, password);*/
                UserAuthCommand userAuthCommand = new UserAuthCommand(email, password);
                UserProfile userProfile = retrofitAPIService.authorizeUser(userAuthCommand);
                Runnable runnable = new Runnable() {
                    @Override
                    public void run() {
                        if (userProfile != null) {
                            Intent intent = new Intent(getApplicationContext(), HomeActivity.class);
                            startActivity(intent);
                        } else {
                            Toast.makeText(getApplicationContext(), "Bad", Toast.LENGTH_SHORT).show();
                        }
                    }
                };
                LoginActivity.this.runOnUiThread(runnable);
               /* final Looper looper = Looper.myLooper();
                looper.quit();*/
            }
        }).start();
        //new UserLoginTask(email, password).execute((Void) null);
    }
}

我通过点击登录按钮调用此方法，覆盖设置setOnClickListener并重写onClick（）。

我的问题是，当我输入一些错误的凭据时，Toast会在屏幕上显示，但后端会进入无限循环。我做了一些调试，似乎当前线程从Looper.class进入loop（）方法。

任何人都可以帮助我吗？很多！

Answer 1

我建议你使用AsyncTask来自动管理线程和uithread回调。

例如

private class LoginTask extends AsyncTask<ParamsType, ProgressType, ResultType> {
 protected ResultType doInBackground(ParamsType... params) {
     // This method runs in a background thread
     return result;
 }

 protected void onPostExecute(ResultType result) {
     // This method runs in UiThread
 }
}

将您的登录逻辑放在doInBackground()方法中，将结果逻辑放在onPostExecute()中。并运行：

new LoginTask().execute(params);

希望这有帮助。

Runnable在Android中无限循环

1 个答案: