Android UI开发第十五篇——分享一个登录缓冲界面

今天在网上发现了一个很漂亮的缓冲界面，在这里分享一下。主要还是用的android Anim。

java code：

public class Main extends Activity {
	private Animation anm;
	private int marginsTop;
	public List<ImageView> images;
	public LinearLayout ll;

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

		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);

		requestWindowFeature(Window.FEATURE_NO_TITLE);

		DisplayMetrics dm = this.getResources().getDisplayMetrics();

		int height = dm.heightPixels;
		marginsTop = height - 100;
		anm = AnimationUtils.loadAnimation(this, R.anim.myanim);
		ll = new LinearLayout(this);
		ll.setBackgroundResource(R.drawable.background);

		images = new ArrayList<ImageView>();
		initImage(ll);
		playAnimation();
		setContentView(ll);
	}

	private void playAnimation() {
		new Thread() {
			@Override
			public void run() {
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				int runcount = 0;
				while (true) {
					if (runcount < 2) {
						for (int i = 0; i <= 6; i++) {
							handler.sendEmptyMessage(i);
							try {
								Thread.sleep(400);
							} catch (InterruptedException e) {
								e.printStackTrace();
							}
						}
						runcount++;
					} else {
						handler.sendEmptyMessage(99);
						runcount = 0;
					}

				}

			}

		}.start();
	}

	Handler handler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case 0:
				images.get(0).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.l));
				images.get(0).startAnimation(anm);

				break;
			case 1:
				images.get(1).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.o));
				images.get(1).startAnimation(anm);
				break;
			case 2:
				images.get(2).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.a));
				images.get(2).startAnimation(anm);
				break;
			case 3:
				images.get(3).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.d));
				images.get(3).startAnimation(anm);
				break;
			case 4:
				images.get(4).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.i));
				images.get(4).startAnimation(anm);
				break;
			case 5:
				images.get(5).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.n));
				images.get(5).setAnimation(anm);
				break;
			case 6:
				images.get(6).setImageDrawable(
						Main.this.getResources().getDrawable(R.drawable.g));
				images.get(6).setAnimation(anm);
				break;
			case 99:
				clearImage();
				break;
			}
		}
	};

	private void clearImage() {
		for (ImageView image : images) {
			image.setImageDrawable(null);
			image.destroyDrawingCache();
		}
	}

	private void initImage(LinearLayout layout) {

		layout.setGravity(Gravity.CENTER_HORIZONTAL);
		LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(40, 40);
		param.setMargins(30, marginsTop, 0, 0);

		LinearLayout.LayoutParams param2 = new LinearLayout.LayoutParams(40, 40);
		param2.setMargins(-5, marginsTop, 0, 0);

		ImageView l = new ImageView(this);
		l.setLayoutParams(param);
		layout.addView(l);
		images.add(l);

		ImageView o = new ImageView(this);
		o.setLayoutParams(param2);
		layout.addView(o);
		images.add(o);

		ImageView a = new ImageView(this);
		a.setLayoutParams(param2);
		layout.addView(a);
		images.add(a);

		ImageView d = new ImageView(this);
		d.setLayoutParams(param2);
		layout.addView(d);
		images.add(d);

		ImageView i = new ImageView(this);
		i.setLayoutParams(param2);
		layout.addView(i);
		images.add(i);

		ImageView n = new ImageView(this);
		n.setLayoutParams(param2);
		layout.addView(n);
		images.add(n);

		ImageView g = new ImageView(this);
		g.setLayoutParams(param2);
		layout.addView(g);
		images.add(g);
	}
}

anim code：

<?xml version="1.0" encoding="utf-8"?>  
  
<set xmlns:android="http://schemas.android.com/apk/res/android"  
    android:shareInterpolator="false">  
    <scale android:interpolator="@android:anim/accelerate_interpolator"  
        android:fromXScale="0.5"   
        android:toXScale="1.2"   
        android:fromYScale="0.5"  
        android:toYScale="1.2"   
        android:pivotX="50%"   
        android:pivotY="50%"  
        android:fillAfter="false"   
        android:startOffset="-50"  
        android:duration="100"  
/>  
</set>