Question

我的应用程序有一个登录活动，我想＆＃34;锁定＆＃34;用户在经过一定次数的尝试后退出。我想将我的int计数器存储在共享偏好中，但我不确定如何设置计时器以便在首选项中恢复。这是我登录的代码。

login_Button.setOnClickListener(new View.OnClickListener(){


        @Override
        public void onClick(View v) {

            int uid = 1155;
            String pass = "pass";

            SharedPreferences userDetails = getSharedPreferences(User_File, MODE_PRIVATE);
            SharedPreferences.Editor edit = userDetails.edit();

            edit.putInt("userID", uid);
            edit.putString("password", pass);
            edit.commit();


            if((etUserID.getText().toString().equals(""))){
                Toast.makeText(getApplicationContext(),"Please enter a User ID", Toast.LENGTH_LONG).show();
            }else if (etPassword.getText().toString().equals("")){
                Toast.makeText(getApplicationContext(),"Please enter a password", Toast.LENGTH_LONG).show();
            }else{
                String user_id = etUserID.getText().toString();
                int user_id2 = Integer.parseInt(user_id);
                String user_password = etPassword.getText().toString();

                int userID = userDetails.getInt("userID", 1);
                String password = userDetails.getString("password", "no name");

                if (userID == user_id2 && password.equals(user_password)){
                    startActivity(new Intent(LogOn.this,CrimeMap.class));
                }else{
                    counter = counter - 1;
                    Toast.makeText(getApplicationContext(), "You have" + counter + "attempts remaining", Toast.LENGTH_LONG).show();

                    if(counter == 0){

                    }
                }
            }



        }
    });

Answer 1

锁定应用，然后创建Handler以等待该时间：

//Run this code after n unsuccessful attempts

lock_app();

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        reset_counter_in_preferences();
        ask_for_login_again();
    }
}, 30000); //Time (in ms) that the app will remain locked for.

您的lock_app()功能可以设置button as disabled，show a Dialog或ProgressBar。

ask_for_login_again()也可称为unlock_app()。

Answer 2

int count = 3;
String attempt;

将此代码放在asynctask

的失败部分

   count--;
             your_textview.setText(Integer.toString(count));
             attempt = your_textview.getText().toString();

                if (count == 0) {
                    Toast.makeText(Login.this,"something went wrong",Toast.LENGTH_SHORT).show();
                    btn_submit.setEnabled(false);
                }

在asynctask

成功时保存您的尝试

SaveSharedPreference.set_attempt(Login.this,attempt);

Answer 3

使用闹钟管理器添加计时器。这样，当用户不在应用程序上时，它仍将倒计时

Android App登录活动在尝试太多后被锁定

3 个答案: