android进度条(ProgressBar)实现动画效果

要实现这样一个动画的时候，可以用seekbar来实现，seekbar 的seekbar.setProgress()和seekbar.setSecondaryProgress()方法可以让我们实现这个方法，下面是具体实现的代码

drawable目录下新建一个progressbar.xml

MainActivity中的代码如下

public class MainActivity extends Activity {
    private Timer mTimer;
    private int i;
    private ProgressBar uploadPb;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        uploadPb = (ProgressBar) findViewById(R.id.pb_upload);

        i = 0;
        mTimer = new Timer();
        setTimerTask();
    }

    private void setTimerTask() {
        mTimer.schedule(new TimerTask() {
            @Override
            public void run() {
                Message message = new Message();
                message.what = 1;
                doActionHandler.sendMessage(message);
            }
        }, 0, 10);//0ms后   10ms执行一次
    }

    private Handler doActionHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            int msgId = msg.what;
            switch (msgId) {
                case 1:
                    if (i <= 420) {
                        uploadPb.setProgress(i);
                        uploadPb.setSecondaryProgress(i + 80);
                        i++;
                    } else {
                        i = 0;
                    }
                    break;
                default:
                    break;
            }
        }
    };
}