教你製作漂亮的Android之緩衝介面

　　上面的字型會動態顯示，這種效果在我們啟動一個應用程式時，經常使用

　　代碼如下：

　　UIDemoActivity的代碼：

public class UIDemoActivity extends Activity {    /** Called when the activity is first created. */private Animation mAnimation;private int marginTop;private List<ImageView> mimageView;private LinearLayout mLinearLayout;private int[] imageId = {R.drawable.l, R.drawable.a, R.drawable.o, R.drawable.d,             R.drawable.i, R.drawable.n, R.drawable.g};    @Override    public void onCreate(Bundle savedInstanceState)     {        super.onCreate(savedInstanceState);        //設定全屏        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,        WindowManager.LayoutParams.FLAG_FULLSCREEN);        //設定無標題        this.requestWindowFeature(Window.FEATURE_NO_TITLE);        //擷取螢幕的尺寸資訊        DisplayMetrics dm=this.getResources().getDisplayMetrics();        marginTop=dm.heightPixels-100;                //載入動畫        mAnimation=AnimationUtils.loadAnimation(this, R.anim.cache);                mLinearLayout=new LinearLayout(this);        mLinearLayout.setBackgroundResource(R.drawable.background);                mimageView=new ArrayList<ImageView>();                imageInit(mLinearLayout);        this.setContentView(mLinearLayout);        startAnimation();    }            private void imageInit(LinearLayout layout)    {    layout.setGravity(Gravity.CENTER_HORIZONTAL);    //layout.setOrientation(LinearLayout.VERTICAL);        //定義兩個布局參數    LinearLayout.LayoutParams param1=new LinearLayout.LayoutParams(40,40);    param1.setMargins(0,marginTop, 0, 0);        LinearLayout.LayoutParams param2=new LinearLayout.LayoutParams(40,40);    param2.setMargins(0,marginTop, 0, 0);        ImageView l = new ImageView(this);    //應用LayoutParam    l.setLayoutParams(param1);    layout.addView(l);    mimageView.add(l);        ImageView o = new ImageView(this);    o.setLayoutParams(param2);    layout.addView(o);    mimageView.add(o);        ImageView a = new ImageView(this);    a.setLayoutParams(param2);    layout.addView(a);    mimageView.add(a);        ImageView d = new ImageView(this);    d.setLayoutParams(param2);    layout.addView(d);    mimageView.add(d);        ImageView i = new ImageView(this);    i.setLayoutParams(param2);    layout.addView(i);    mimageView.add(i);        ImageView n = new ImageView(this);    n.setLayoutParams(param2);    layout.addView(n);    mimageView.add(n);        ImageView g = new ImageView(this);    g.setLayoutParams(param2);    layout.addView(g);    mimageView.add(g);    }        private void imageClear() {    for(ImageView image:mimageView) {    //將ImageView置為空白    image.setImageDrawable(null);    //清除緩衝    image.destroyDrawingCache();    }    }        Handler handler=new Handler()    {     @Override     public void handleMessage(Message msg)     {     // TODO Auto-generated method stub        switch(msg.what){case 0:mimageView.get(0).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.l));mimageView.get(0).setAnimation(mAnimation);break;case 1:mimageView.get(1).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.o));mimageView.get(1).setAnimation(mAnimation);break;case 2:mimageView.get(2).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.a));mimageView.get(2).setAnimation(mAnimation);break;case 3:mimageView.get(3).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.d));mimageView.get(3).setAnimation(mAnimation);break;case 4:mimageView.get(4).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.i));mimageView.get(4).setAnimation(mAnimation);break;case 5:mimageView.get(5).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.n));mimageView.get(5).setAnimation(mAnimation);break;case 6:mimageView.get(6).setImageDrawable(UIDemoActivity.this.getResources().getDrawable(R.drawable.g));mimageView.get(6).setAnimation(mAnimation);break;case 100:imageClear();break;}}        };        public void startAnimation()    {    new Thread()    {    public void run() {    try{Thread.sleep(1000);} catch (InterruptedException e){// TODO Auto-generated catch blocke.printStackTrace();}int runCount=0;while(true){if(runCount<2){for(int i=0;i<7;i++){           handler.sendEmptyMessage(i);try{  Thread.sleep(400);} catch (InterruptedException e){// TODO Auto-generated catch blocke.printStackTrace();}}handler.sendEmptyMessage(100);runCount++;}else{Intent intent=new Intent(UIDemoActivity.this,SecendActivity.class);UIDemoActivity.this.startActivity(intent);break;}}    };    }.start();    }}

2、動畫xml

<?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="0.0" android:toXScale="1.2" android:fromYScale="0.0"android:toYScale="1.2" android:pivotX="50%" android:pivotY="50%"android:fillAfter="false" android:startOffset="-50"android:duration="100"/>    </set>