[안드로이드,Android]타이머 Timer

 

MainActivity

package com.example.ggari_timer;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

public class MainActivity extends Activity {

	int val=0;
	TextView tv01;
	Handler handler;
	
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tv01=(TextView)findViewById(R.id.tv01);

        handler = new Handler() {
			public void handleMessage(Message msg) {
				val++;
				tv01.setText("타이머 = " + val);
				if (val <= 9 ) {
					handler.sendEmptyMessageDelayed(0,1000); // 1초에 한번 업, 1000 = 1 초
				}
			}
		};
		handler.sendEmptyMessage(0);
	}
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/tv01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="1"
        android:textSize="30dip" />

</RelativeLayout>