PowenKo, Android, Tutorial 019-1, Dialog, Toast

Context context = getApplicationContext();
CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;

Toast toast = Toast.makeText(context, text, duration);
toast.show();

Tutorial_Dialog_ToastActivity/java

package com.powenko.Tutorial_Dialog_Toast;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.widget.Toast;

public class Tutorial_Dialog_ToastActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Context context = getApplicationContext();
        CharSequence text = "Hello toast! PowenKo.com";
        int duration = Toast.LENGTH_SHORT;

        Toast toast = Toast.makeText(context, text, duration);
        toast.show();
    }
}

reference:
http://developer.android.com/guide/topics/ui/notifiers/toasts.html

Toast.makeText(getApplicationContext(),"資料更新中", Toast.LENGTH_SHORT).show();