Android之制作漂亮的缓存界面
先贴上两张图展示界面：
上面的字体会动态显示，这种效果在我们启动一个应用程序时，经常使用
代码如下：
UIDemoActivity的代码：
[java]
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);
//设置全屏
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
//设置无标题
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
//获取屏幕的尺寸信息
DisplayMetrics dm=this.getResources().getDisplayMetrics();
marginTop=dm.heightPixels-100;
//载入动画
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);
//定义两个布局参数
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);
//应用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) {
//将ImageView置为空
image.setImageDrawable(null);
//清除缓存
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 block
e.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 block
e.printStackTrace();
}
}
handler.sendEmptyMessage(100);
runCount++;
}
else
{
Intent intent=new Intent(UIDemoActivity.this,SecendActivity.class);
UIDemoActivity.this.startActivity(intent);
break;
}
}
};
}.start();
}
}
2、动画xml
[html]
<?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>