创建TimePicker方法

Question

有没有一种方法可以让我的代码，返回由用户选择的时间timepicker方法？ 我想建立它在一个它自己的阶级，所以我可以把它叫做一个按钮被按下时，则设置按钮文本到返回的时间。

Answer 1

我已经创建了一个有一个按钮，单击时显示了timePicker，一旦你选择一个时间，它显示通过该方法的日志的时间活动“onTimeSet”。这应该解决您的案件。

//MainActivity.java 

     import android.app.TimePickerDialog; 
     import android.os.Bundle; 
     import android.support.v7.app.AppCompatActivity; 
     import android.util.Log; 
     import android.view.View; 
     import android.widget.TimePicker; 

     public class MainActivity extends AppCompatActivity implements TimePickerDialog.OnTimeSetListener { 


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

       findViewById(R.id.button).setOnClickListener(new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         TimePickerFragment dialogFragment = new TimePickerFragment(); 
         dialogFragment.show(getSupportFragmentManager(), "timePicker"); 
        } 
       }); 
      } 

      @Override 
      public void onTimeSet(TimePicker view, int hourOfDay, int minute) { 
       Log.d("Time", hourOfDay + ":" + minute); 
      } 
     } 

    //TimePickerFragment.java 


    import android.app.Dialog; 
    import android.app.TimePickerDialog; 
    import android.os.Bundle; 
    import android.support.annotation.NonNull; 
    import android.support.v4.app.DialogFragment; 
    import android.text.format.DateFormat; 

    import java.util.Calendar; 

    /** 
    * Created by Azeez.Taiwo on 7/21/2017. 
    */ 

    public class TimePickerFragment extends DialogFragment { 

     @NonNull 
     @Override 
     public Dialog onCreateDialog(Bundle savedInstanceState) { 
      final Calendar c = Calendar.getInstance(); 
      int hour = c.get(Calendar.HOUR_OF_DAY); 
      int minute = c.get(Calendar.MINUTE); 

      return new TimePickerDialog(getActivity(), 
        (TimePickerDialog.OnTimeSetListener)getActivity(), hour, minute, 
        DateFormat.is24HourFormat(getActivity())); 

     } 
    } 

//activity_main.xml 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:layout_below="@+id/gallery"> 


    <Button 
     android:id="@+id/button" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="open TIME picker" 
     /> 

</LinearLayout>