Android实现去哪儿携程地址互换效果

public class AddressActivity extends AppCompatActivity {

 private TextView mTvLeft;
 private TextView mTvRight;
 private Button mBtn;
 private RelativeLayout mRlLeft;
 private RelativeLayout mRlRight;
 private WindowManager mWindowManager;
 private int[] mLeftLocation;
 private int[] mRightLocation;
 private Bitmap mLeftCacheBitmap;
 private Bitmap mRightCacheBitmap;
 private LinearLayout mLl;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_address);

  mWindowManager = getWindowManager();

  mTvLeft = (TextView) findViewById(R.id.tv_left);
  mTvRight = (TextView) findViewById(R.id.tv_right);
  mRlLeft = (RelativeLayout) findViewById(R.id.rl_left);
  mRlRight = (RelativeLayout) findViewById(R.id.rl_right);
  mLl = (LinearLayout) findViewById(R.id.ll);
  mBtn = (Button) findViewById(R.id.btn);
  mBtn.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    textAnim();
    mBtn.setEnabled(false);
   }
  });
 }


 /**
  * 左边tv的镜像view
  */
 private ImageView copyViewLeft;
 /**
  * 右边tv的镜像view
  */
 private ImageView copyViewRight;

 /**
  * 获取tv的属性,计算偏移量,
  */
 private void textAnim() {

  //获取tv控件距离父控件的位置
  int leftRight = mTvLeft.getRight();
  int rightLeft = mTvRight.getLeft();

  //包裹右侧tv距离父控件的距离
  int rlRight = mRlRight.getRight();
  int rlLeft = mRlRight.getLeft();
  //在哪里设的padding就要用哪个控件来获取padding值
  int paddingStart = mLl.getPaddingStart();

  Log.d("AddressActivity", "paddingStart:" + paddingStart);

  //左侧textview需要移动的距离
  int leftOffset = rlRight - leftRight - paddingStart;
  //右侧textview需要移动的距离
  int rightOffset = rlLeft + rightLeft - paddingStart;

  //创建出镜像view
  createCopyView();

  //隐藏掉两边的tv
  mTvLeft.setVisibility(View.INVISIBLE);
  mTvRight.setVisibility(View.INVISIBLE);

  //开启镜像view的动画
  leftAnim(leftOffset,mLeftLocation[0]);
  rightAnim(rightOffset,mRightLocation[0]);
 }

 /**
  * 创建镜像view
  */
 private void createCopyView(){
  mLeftLocation = new int[2];
  mRightLocation = new int[2];
  //获取相对window的坐标
  mTvLeft.getLocationInWindow(mLeftLocation);
  mTvRight.getLocationInWindow(mRightLocation);

  //获取左边tv的缓存bitmap
  mTvLeft.setDrawingCacheEnabled(true);
  mLeftCacheBitmap = Bitmap.createBitmap(mTvLeft.getDrawingCache());
  mTvLeft.destroyDrawingCache();
  //获取右边tv的缓存bitmap
  mTvRight.setDrawingCacheEnabled(true);
  mRightCacheBitmap = Bitmap.createBitmap(mTvRight.getDrawingCache());
  mTvRight.destroyDrawingCache();

  //创建出两个镜像view
  copyViewLeft = createCopyView(mLeftLocation[0], mLeftLocation[1], mLeftCacheBitmap);
  copyViewRight = createCopyView(mRightLocation[0], mRightLocation[1], mRightCacheBitmap);
  //释放bitmap资源...这我不确定是不是这么做
  mLeftCacheBitmap = null;
  mRightCacheBitmap = null;
 }
 /**
  * 左侧镜像view的动画
  * @param offset 偏移量
  * @param defX  原始位置的x
  */
 private void leftAnim(int offset, final int defX){
  ValueAnimator leftAnimV = ValueAnimator.ofInt(0,offset);
  leftAnimV.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
   @Override
   public void onAnimationUpdate(ValueAnimator valueAnimator) {
    int animatedValue = (int) valueAnimator.getAnimatedValue();
    WindowManager.LayoutParams layoutParams = (WindowManager.LayoutParams) copyViewLeft.getLayoutParams();
    //往右边移动所以x是变大的
    layoutParams.x = defX + animatedValue;
    mWindowManager.updateViewLayout(copyViewLeft,layoutParams);
   }
  });
  leftAnimV.setDuration(400);
  leftAnimV.start();
  //左侧动画监听
  leftAnimV.addListener(new AnimatorListenerAdapter() {
   @Override
   public void onAnimationEnd(Animator animation) {
    //改变值
    String s = mTvLeft.getText().toString();
    mTvLeft.setText(mTvRight.getText().toString());
    mTvRight.setText(s);
    mTvLeft.setVisibility(View.VISIBLE);
    mWindowManager.removeView(copyViewLeft);
    copyViewLeft = null;
    mBtn.setEnabled(true);
   }
  });
 }

 /**
  * 右侧镜像view动画
  * @param offset 偏移量
  * @param defX  原始位置的x
  */
 private void rightAnim(int offset, final int defX){
  ValueAnimator rightAnimV = ValueAnimator.ofInt(0,offset);
  rightAnimV.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
   @Override
   public void onAnimationUpdate(ValueAnimator valueAnimator) {
    int animatedValue = (int) valueAnimator.getAnimatedValue();
    WindowManager.LayoutParams layoutParams = (WindowManager.LayoutParams) copyViewRight.getLayoutParams();
    layoutParams.x = defX - animatedValue;
    mWindowManager.updateViewLayout(copyViewRight,layoutParams);
   }
  });
  rightAnimV.setDuration(400);
  rightAnimV.start();
  rightAnimV.addListener(new AnimatorListenerAdapter() {
   @Override
   public void onAnimationEnd(Animator animation) {
    mTvRight.setVisibility(View.VISIBLE);
    mWindowManager.removeView(copyViewRight);
    copyViewRight = null;
   }
  });
 }

 /**
  * 创建镜像view
  *
  * @param x
  * @param y
  * @param bitmap
  */
 private ImageView createCopyView(int x, int y, Bitmap bitmap) {
  WindowManager.LayoutParams mLayoutParams = new WindowManager.LayoutParams();
  mLayoutParams.format = PixelFormat.TRANSLUCENT;   //图片之外其他地方透明
  mLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;
  mLayoutParams.x = x; //设置imageView的原点
  mLayoutParams.y = y - getStatusHeight(this);
  mLayoutParams.alpha = 1f;        //设置透明度
  mLayoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
  mLayoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
  mLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
    | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
  ImageView copyView = new ImageView(this);
  copyView = new ImageView(this);
  copyView.setImageBitmap(bitmap);
  mWindowManager.addView(copyView, mLayoutParams); //添加该iamgeView到window
  return copyView;
 }

 /**
  * 获取状态栏的高度
  * @param context
  * @return
  */
 private static int getStatusHeight(Context context) {
  int status;
  Rect localRect = new Rect();
  ((Activity) context).getWindow().getDecorView().getWindowVisibleDisplayFrame(localRect);
  statusHeight = localRect.top;
  if (0 == statusHeight) {
   Class localClass;
   try {
    localClass = Class.forName("com.android.internal.R$dimen");
    Object localObject = localClass.newInstance();
    int i5 = Integer.parseInt(localClass.getField("status_bar_height").get(localObject).toString());
    statusHeight = context.getResources().getDimensionPixelSize(i5);
   } catch (Exception e) {
    e.printStackTrace();
   }
  }
  return statusHeight;
 }
}