xdocs/usecases/scxml-stopwatch-on-android/StopWatchActivity.java.txt

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.scxml.samples.android;

import java.util.Timer;
import java.util.TimerTask;

import org.apache.commons.scxml.env.StopWatch;
import org.apache.commons.scxml.samples.android.R;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class StopWatchActivity extends Activity {

    private static final int UPDATE_TIME = 1; 
    private static final int UPDATE_STATE = 2; 
	private StopWatch 	mStopWatch;
    private Button		mStartButton;
    private Button		mSplitButton;
    private TextView 	mState = null;
    private TextView 	mTime = null;
    
    
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		this.setContentView(R.layout.stopwatch_display);
		mStartButton = (Button) findViewById(R.id.startstop);
		mSplitButton	= (Button) findViewById(R.id.split);
		mState = (TextView) findViewById(R.id.status);
		mTime = (TextView) findViewById(R.id.time);
		mStopWatch = new StopWatch();
		
		
		mStartButton.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				Button startButton = (Button) v;
				Button splitButton = (Button) findViewById(R.id.split);
				
				String action = startButton.getText().toString();
	            if (action == getString(R.string.start)) {
	            	mStopWatch.fireEvent(StopWatch.EVENT_START);
	            	startButton.setText(R.string.stop);
	            	splitButton.setEnabled(true);
	            } else if (action == getString(R.string.stop)) {
	            	mStopWatch.fireEvent(StopWatch.EVENT_STOP);
	            	startButton.setText(R.string.reset);
	            	splitButton.setEnabled(false);
	            } else if (action == getString(R.string.reset)){
	            	mStopWatch.fireEvent(StopWatch.EVENT_RESET);
	            	startButton.setText(R.string.start);
	                splitButton.setText(R.string.split);
	            }
			}
		});
		
		mSplitButton.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View v) {
				Button splitButton = (Button) v;
				
				String action = splitButton.getText().toString();
	            if (action == getString(R.string.split)) {
	            	mStopWatch.fireEvent(StopWatch.EVENT_SPLIT);
	            	splitButton.setText(R.string.unsplit);
	            } else if(action == getString(R.string.unsplit)){
	            	mStopWatch.fireEvent(StopWatch.EVENT_UNSPLIT);
	            	splitButton.setText(R.string.split);
	            }
			}
		});
		
		
		Timer displayTimer = new Timer();
        displayTimer.scheduleAtFixedRate(new TimerTask() {
            public void run() {
                mHandler.sendMessage(mHandler.obtainMessage(UPDATE_STATE, mStopWatch.getCurrentState()));
                mHandler.sendMessage(mHandler.obtainMessage(UPDATE_TIME, mStopWatch.getDisplay()));
            }
        }, 100, 100);
        
	}
	

	private Handler mHandler = new Handler() {
		@Override public void handleMessage(Message msg) {
		    switch (msg.what) {
		        case UPDATE_STATE:
		        	mState.setText((String)msg.obj);
		        	break;
		        case UPDATE_TIME:
		        	mTime.setText((String)msg.obj);
		        	break;
		        default:
		            super.handleMessage(msg);
		    }
		}
	};
	
}