Question

我正在一个用户在TimePickerDialog中输入时间的项目中工作。我想获取该输入并将其存储在另一个变量中并将其显示为textView。

 public class MainActivity extends Activity {

Button b1;
TextView tv;
int hour,min;

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

    b1 = (Button)findViewById(R.id.b1);
    tv = (TextView)findViewById(R.id.tv1);

    b1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            TimePickerDialog tpd = new TimePickerDialog(MainActivity.this, new OnTimeSetListener() {

                @Override
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    // TODO Auto-generated method stub
                    hour = hourOfDay;
                    min = minute;
                }
            }, hour, min, false);
            tpd.show();
            tv.setText(hour + ":" + min);
        }

        });
    }


}

当我首先运行此应用程序时，textview显示0：0。我按下按钮对话框出现我设置时间并按完成但文本视图没有改变，只有在我再次按下按钮后，textview才会改变到上一个输入。我想要的是，当我在timepickerdialog中按完后，textview将显示我设置的时间。只有在我再次按下按钮后才能显示该值。

Answer 1

单击完成按钮后，您需要更新TextView。现在，您的TextView在完成时间选择后无法更新。只需更改您的代码，如下所示：

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

    b1 = (Button)findViewById(R.id.b1);
    tv = (TextView)findViewById(R.id.tv1);

    b1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            TimePickerDialog tpd = new TimePickerDialog(MainActivity.this, new OnTimeSetListener() {

                @Override
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    // TODO Auto-generated method stub
                    hour = hourOfDay;
                    min = minute;

                    //Place it here
                    tv.setText(hour + ":" + min);
                }
            }, hour, min, false);
            tpd.show();
        }

        });
    }
}

Answer 2

试试这个

public class MainActivity extends Activity {

Button b1;
TextView tv;
int hour,min;

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

    b1 = (Button)findViewById(R.id.b1);
    tv = (TextView)findViewById(R.id.tv1);

    b1.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            TimePickerDialog tpd = new TimePickerDialog(MainActivity.this, new OnTimeSetListener() {

                @Override
                public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                    // TODO Auto-generated method stub
                    hour = hourOfDay;
                    min = minute;
                    tv.setText(hour + ":" + min);
                }
            }, hour, min, false);
            tpd.show();
         }
     });
   }
}

从timePickerDialog获取输入

2 个答案: