来看贴图
原图魔法效果:(透明的有些看不清)
PS之后加了背景色并放大后的效果
在屏幕中的效果(左上很小的那个,其他都是背景图):
中间很小的那个就是
先看动画实现代码explosion.xml(explosion意思是爆发)
手指点击后产生泡泡的动画是5张40*40的图片顺序播放产生的,每张持续时间为70毫秒,播放模式为oneshot,即一次。
BubbleExplosion.javapackage com.ray.bubble; import android.app.Activity; import android.content.Context; import android.graphics.drawable.AnimationDrawable; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.view.View.OnTouchListener; import android.widget.FrameLayout; import android.widget.ImageView; public class BubbleExplosion extends Activity { private FrameLayout fl; private ExplosionView exv1; private AnimationDrawable exa1; // private Contact contact; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //set full screen requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams. FLAG_FULLSCREEN , WindowManager.LayoutParams. FLAG_FULLSCREEN); fl = new FrameLayout(this); fl.setBackgroundResource(R.drawable.bg); exv1 = new ExplosionView(this); exv1.setVisibility(View.INVISIBLE); exv1.setBackgroundResource(R.anim.explosion); exa1 = (AnimationDrawable)exv1.getBackground(); fl.addView(exv1); fl.setOnTouchListener(new LayoutListener()); setContentView(fl); } class ExplosionView extends ImageView{ public ExplosionView(Context context) { super(context); } //handle the location of the explosion public void setLocation(int top,int left){ this.setFrame(left, top, left+40, top+40); } } class LayoutListener implements OnTouchListener{ public boolean onTouch(View v, MotionEvent event) { //first u have to stop the animation,or if the animation //is starting ,u can start it again! exv1.setVisibility(View.INVISIBLE); exa1.stop(); float x = event.getX(); float y = event.getY(); exv1.setLocation((int)y-20, (int)x-20); exv1.setVisibility(View.VISIBLE); exa1.start(); return false; } } }
精华提炼:
1.Line 31 exv1.setBackgroundResource(R.anim.explosion); exv1是继承自ImageView的视图,看到他将一个animation设置成背景了,惊讶!原来动画可以设置为背景图。 2.Line 32 exa1 = (AnimationDrawable)exv1.getBackground(); Line 60 exa1.start(); 不仅仅Aniamtion有start()方法,原来AnimationDrawable作为一个Drawable的子类也可以有start()方法哦。 没见过吧,之前我也没见过;见过啦?我现在也见过了! 再补充几个常识性的 3.setContentView(fl); 用代码绘制布局,完全没用到layout/main.xml~~ 4.Line 23-25 设置全屏