一种Android 类似电影倒计时效果

import java.util.Timer;
import java.util.TimerTask;
import android.annotation.SuppressLint;
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.view.animation.Animation;
import android.view.animation.RotateAnimation;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class Test extends Activity {

	private long mlCount = 50;
	private long mCount = 0; 
	TextView tvTime;
	private Button startbuttondaoji;
	private Timer timer = null;
	private TimerTask task = null;
	private Handler handler = null;
	private Message msg = null;
	private ImageView min_progress, min_progress_hand;
	Animation rotateAnimation;
	float predegree = 0;
	boolean okclear = false;

	@SuppressLint("HandlerLeak")
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		init();
	}

	private void init() {
		setContentView(R.layout.test);
		tvTime = (TextView) findViewById(R.id.duocitvTime);

		startbuttondaoji = (Button) findViewById(R.id.startbuttonduoci);

		min_progress = (ImageView) this.findViewById(R.id.duocimin_progress);
		min_progress_hand = (ImageView) this
				.findViewById(R.id.duocimin_progress_hand);

		tvTime.setText("4");
		SaveRun.setisjishi(false);
		handler = new Handler() {
			@Override
			public void handleMessage(Message msg) {
				switch (msg.what) {
				case 1:
					if(mlCount>1){
						mlCount--;
						mCount++;
					}else{
						break;
					}
					
					int totalSec = 0;

					totalSec = (int) (mlCount / 10);
				
		
					int sec = (totalSec % 60);
					try {

						rotateAnimation = new RotateAnimation(predegree,
								(float) (36 * mCount),
								Animation.RELATIVE_TO_SELF, 0.5f,
								Animation.RELATIVE_TO_SELF, 0.5f);

						rotateAnimation.setDuration(100);

						rotateAnimation.setFillAfter(false);

						min_progress_hand.startAnimation(rotateAnimation);
						min_progress.startAnimation(rotateAnimation);

						tvTime.setText(String.format("%1$2d", 
								sec));
						predegree = (float) (36 * mCount);

					} catch (Exception e) {
						tvTime.setText(  sec +"");
						e.printStackTrace();
					}
					break;
				default:
					break;
				}
				super.handleMessage(msg);
			}
		};

	}

	@Override
	protected void onStart() {
		star();
		super.onStart();
	}

	private void star() {

		startbuttondaoji.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				startbuttondaoji.setVisibility(View.GONE);

				if (null == timer) {
					if (null == task) {
						SaveRun.setisjishi(true);

						okclear = false;
						min_progress.setVisibility(View.VISIBLE);

						task = new TimerTask() {
							@Override
							public void run() {
								if (null == msg) {
									msg = new Message();
								} else {
									msg = Message.obtain();
								}
								msg.what = 1;
								handler.sendMessage(msg);
							}
						};
					}
					timer = new Timer(true);
					timer.schedule(task, 100, 100);
				}

			}
		});

	}

	View.OnClickListener startPauseListener = new View.OnClickListener() {
		@Override
		public void onClick(View v) {
			if (null == timer) {
				if (null == task) {
					SaveRun.setisjishi(true);

					okclear = false;
					min_progress.setVisibility(View.VISIBLE);

					task = new TimerTask() {
						@Override
						public void run() {
							if (null == msg) {
								msg = new Message();
							} else {
								msg = Message.obtain();
							}
							msg.what = 1;
							handler.sendMessage(msg);
						}
					};
				}
				timer = new Timer(true);
				timer.schedule(task, 100, 100);
			} else {
				try {
					SaveRun.setisjishi(false);
					okclear = true;
					task.cancel();
					task = null;
					timer.cancel();
					timer.purge();
					timer = null;
					handler.removeMessages(msg.what);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}
	};
}