Question

我正在制作一个Android时间表应用程序，我有两个微调器，允许用户选择开始时间和讲座的持续时间。

没有讲座可以在晚上6点之后完成，但持续时间微调器允许讲座持续长达3个小时。我想要做的是，当用户选择4PM或5PM时，对于开始时间，持续时间的选项将根据此选择进行限制。例如，如果选择的开始时间是下午5点，则持续时间不能超过1小时。

谢谢！源代码来自MainActivity.Java

public class MainActivity extends Activity
{
    //Data types, inputs and buttons
    private     EditText    codeInput;
    private     Spinner     dayInput;
    private     Spinner     timeInput;
    private     Spinner     durationInput;
    private     Spinner     sessionInput;
    private     EditText    roomInput;

    private     Button      addNewButton;
    private     Button      displayTimetableButton;

    //Creates the database handler
    DatabaseHandler DBHandler;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Find spinners and EditText elements in layout
        codeInput       =   (EditText)  findViewById(R.id.CodeInput);
        dayInput        =   (Spinner)   findViewById(R.id.DayInput);
        timeInput       =   (Spinner)   findViewById(R.id.TimeInput);
        durationInput   =   (Spinner)   findViewById(R.id.DurationInput);
        sessionInput    =   (Spinner)   findViewById(R.id.SessionInput);
        roomInput       =   (EditText)  findViewById(R.id.RoomInput);

        //Find buttons in layout
        addNewButton            =   (Button)    findViewById(R.id.AddNewButton);
        displayTimetableButton  =   (Button)    findViewById(R.id.DisplayTimetableButton);

        addNewButton.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                //this method collects and adds all of the input data to the database
                String      code        =   codeInput.getText().toString();
                String      day         =   dayInput.getSelectedItem().toString();
                String      time        =   timeInput.getSelectedItem().toString();
                String      duration    =   durationInput.getSelectedItem().toString();
                String      session     =   sessionInput.getSelectedItem().toString();
                String      room        =   roomInput.getText().toString();

                DBHandler = new DatabaseHandler (getBaseContext());
                DBHandler.open();
                long DatabaseHandler = DBHandler.InsertData(code, day, time, duration, session, room);

                //This toast appears when the module information is successfully added
                Toast.makeText(getBaseContext(), "Module Added", Toast.LENGTH_LONG).show();

                //These set the EditText fields to blank, ready for the next input
                codeInput       .   setText("");
                roomInput       .   setText("");

                //Close the database connection
                DBHandler.close();
            }
        });

        displayTimetableButton.setOnClickListener(new View.OnClickListener()
        {
            //This method starts the GridView activity when the button is pressed
            @Override
            public void onClick(View v)
            {
                Intent i = new Intent(MainActivity.this, GridViewActivity.class);
                startActivity(i);
            }
        });
    }
}

选择

<string-array name="timeArray">
        <item>  9:00AM  </item>
        <item>  10:00AM </item>
        <item>  11:00AM </item>
        <item>  12:00AM </item>
        <item>  1:00PM  </item>
        <item>  2:00PM  </item>
        <item>  3:00PM  </item>
        <item>  4:00PM  </item>
        <item>  5:00PM  </item>
    </string-array>

<string-array name="durationArray">
        <item>1 Hour      </item>
        <item>2 Hours     </item>
        <item>3 Hours     </item>
    </string-array>

Answer 1

您可以跟踪所选项目并使用事件setOnItemSelectedListener。要相应地更改第二个Spinner项目。

Android Spinner选择禁用另一个微调器中的选择

1 个答案: