从 timePickerDialog 获取输入

Question

我在一个项目中工作，用户在 TimePickerDialog 中输入时间。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);
        }

        });
    }


}

当我运行这个应用程序首先显示 0:0 。我按下按钮，对话框出现我设置时间并按下完成，但 textview 没有改变，只有在我再次按下按钮后，textview 才会更改为上一个输入。我想要的是，当我在 timepickerdialog 中按完成时，textview 将显示我设置的时间。它显示了那个值，但只有在我再次按下按钮之后。

Answer 1

您需要在单击完成按钮时更新 TextView。现在，您的 TextView 在时间选择完成后不会得到更新。只需像下面这样更改您的代码：

@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

taking inputs from timePickerDialog

android

android-timepicker