android动画之最总总结

动画总结：不管什么动画、透明还是大小、位置、四个动画可以改变的特效很多！但是其中有一个特效是不叫棘手的就是移动特效！假如我现在要做一个仿HTC圆环解锁的特效动画废话少说上代码解释！

public class ScreenUnLockActivity extends Activity implements OnClickListener{
	public Button btn;
	public ImageView imageview;
	public AnimationSet animation = new AnimationSet(true);//动画集合
	public Animation alpha,scale,translate;//透明，尺寸
	
	float mCircleLockTouchX=0 ;//= event.getX() - mLayoutCircle.getLeft();
	float mCircleLockTouchY=0 ;//= event.getY() - mLayoutCircle.getTop();
    //** Called when the activity is first created. *//*
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       // init();
        //btn.setOnClickListener(this);
    }
    
    
    @Override
	public boolean onTouchEvent(MotionEvent event) {
		// TODO Auto-generated method stub
    	if(event.getAction() == MotionEvent.ACTION_UP){
    		mCircleLockTouchX = event.getX();
    		mCircleLockTouchY = event.getY();
    		Log.i("HHJ", "mCircleLockTouchY:  "+mCircleLockTouchY+"   mCircleLockTouchY:"+mCircleLockTouchY);
    		init();
    		startAnimation();
    	}
		return super.onTouchEvent(event);
	}


	public void init(){
    	btn = (Button) findViewById(R.id.btn);
    	imageview = (ImageView) findViewById(R.id.imageview);
    	alpha = new AlphaAnimation(1.0f, 0.0f);
    	alpha.setDuration(1000);
    	scale = new ScaleAnimation(1f, 3f, 1f, 3f,
    			Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);
    	scale.setDuration(1000);
//下面这代码是拿到当前屏幕的中心位置！我屏幕为480*854

    	translate = new TranslateAnimation(0, getWindowManager().getDefaultDisplay().getWidth()/2-imageview.getHeight()/2,
    										0, getWindowManager().getDefaultDisplay().getHeight()/2-imageview.getWidth()/2);
    	translate = new TranslateAnimation(mCircleLockTouchX-imageview.getWidth() / 2- imageview.getLeft(), 240-imageview.getWidth() / 2- imageview.getLeft(),
    										mCircleLockTouchY- imageview.getHeight() / 2- imageview.getTop(), 425- imageview.getHeight() / 2- imageview.getTop());
    	//translate.setFillAfter(false);
    	Log.i("HHJ", "width"+getWindowManager().getDefaultDisplay().getWidth()/2+"    height:"+getWindowManager().getDefaultDisplay().getHeight()/2);
    	translate.setDuration(500);
    }
	@Override
	public void onClick(View v) {
		// TODO Auto-generated method stub
		if(v.getId() == R.id.btn){
			startAnimation();
		}
	}
	public void startAnimation(){
//添加动画集合

		animation.addAnimation(alpha);
		animation.addAnimation(scale);
		animation.addAnimation(translate);
		imageview.startAnimation(animation);
	}
}