NumberFormat vs TimePicker 動態

import java.text.DecimalFormat;

import java.text.NumberFormat;

import android.app.Activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.TimePicker;

import android.widget.Toast;

public class MainActivity extends Activity {

   PlaceholderFragment placeholderFragment;

   @Override

   protected void onCreate(Bundle savedInstanceState) {

     super.onCreate(savedInstanceState);

     setContentView(R.layout.activity_main);

        placeholderFragment=new PlaceholderFragment();

     if (savedInstanceState == null) {

        getFragmentManager().beginTransaction()

             .add(R.id.container, placeholderFragment).commit();

     }

   }

   @Override

   public boolean onCreateOptionsMenu(Menu menu) {

     // Inflate the menu; this adds items to the action bar if it is present.

     getMenuInflater().inflate(R.menu.main, menu);

     return true;

   }

   @Override

   public boolean onOptionsItemSelected(MenuItem item) {

     // Handle action bar item clicks here. The action bar will

     // automatically handle clicks on the Home/Up button, so long

     // as you specify a parent activity in AndroidManifest.xml.

     int id = item.getItemId();

     if (id == R.id.action_settings) {

        return true;

     }

     return super.onOptionsItemSelected(item);

   }

  

   public void btnClick(View v){

     TimePicker timePicker=placeholderFragment.timePicker;

     NumberFormat formatter=new DecimalFormat("00");

     Toast.makeText(this, "Time selected:"+timePicker.getCurrentHour()+":"+formatter.format(timePicker.getCurrentMinute()), Toast.LENGTH_SHORT).show();

   }

   /**

    * A placeholder fragment containing a simple view.

    */

   public static class PlaceholderFragment extends Fragment {

     public TimePicker timePicker;

     public PlaceholderFragment() {

     }

     @Override

     public View onCreateView(LayoutInflater inflater, ViewGroup container,

           Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_main, container,

             false);

     timePicker=(TimePicker)rootView.findViewById(R.id.timePicker);

        timePicker.setIs24HourView(true);

        return rootView;

     }

    

    

   }

}