Activity01.java

package com.yarin.android.Examples_04_05;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class Activity01 extends Activity {

	private TextView textview;

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

		textview = (TextView) this.findViewById(R.id.tv1);

		textview.setTextSize(30);

		Button button = (Button) findViewById(R.id.button1);

		/* ����button���¼���Ϣ */
		button.setOnClickListener(new Button.OnClickListener() {
			public void onClick(View v) {
				DisplayToast("����������������ʾ");
			}
		});
	}

	/* ��ʾToast */
	public void DisplayToast(String str) {
		Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
	}
}