从timePickerDialog获取输入

Question

我在一个项目中工作，在这个项目中，用户会在TimePickerDialog中输入时间。我想接受这个输入，并将它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);
        }

        });
    }


}

当我开始运行这个应用程序时，textview显示0:0。我按下按钮，对话框出现，我设置时间，按下完成，但文本视图没有改变，只有在我再次按下按钮后，文本视图才会更改到前面的输入。我想要的是，当我在“时间选择器”对话框中按“完成”时，textview将显示我设置的时间。它显示了这个值，但只有在我再次按下按钮之后。

Answer 1

尝尝这个

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();
         }
     });
   }
}

Answer 2

单击done按钮时，需要更新TextView。现在，您的TextView没有得到更新后，采摘时间已经完成。只需将代码更改如下：

@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();
        }

        });
    }
}