本文实例为大家分享了Android实现图片浮动拖拽效果的具体代码，供大家参考，具体内容如下

实现步骤

1.先自定义一个浮动工具类

public class MoveImage extends ImageView { /** * * 浮动工具类 * */ private int lastX = 0; private int lastY = 0; private int dx; private int dy; private float movex = 0; private float movey = 0; private int screenWidth; private int screenHeight; public MoveImage(Context context, AttributeSet attrs) { super(context, attrs); screenWidth = ScreenUtils.getWidth(context); screenHeight = ScreenUtils.getHeight(context); } @Override public boolean onTouchEvent(MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); movex = lastX; movey = lastY; break; case MotionEvent.ACTION_MOVE: dx = (int) event.getRawX() - lastX; dy = (int) event.getRawY() - lastY; int left = getLeft() + dx; int top = getTop() + dy; int right = getRight() + dx; int bottom = getBottom() + dy; if (left < 0) { left = 0; right = left + getWidth(); } if (right > screenWidth) { right = screenWidth; left = right - getWidth(); } if (top < 0) { top = 0; bottom = top + getHeight(); } if (bottom > screenHeight) { bottom = screenHeight; top = bottom - getHeight(); } layout(left, top, right, bottom); lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); break; case MotionEvent.ACTION_UP: //避免滑出触发点击事件 if ((int) (event.getRawX() - movex) != 0 || (int) (event.getRawY() - movey) != 0) { return true; } break; default: break; } return super.onTouchEvent(event); }}

2.xml布局的引用

<com.zjtd.bzcommunity.text.MoveImage android:id="@+id/iv_phone_bar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:layout_marginBottom="70dp" android:src="@drawable/my_qiandao_icon" />

3.activity的实现

private MoveImage iv_phone_bar;//签到图片iv_phone_bar = (MoveImage) view.findViewById(R.id.iv_phone_bar);iv_phone_bar.setOnClickListener(this);// 签到case R.id.iv_phone_bar: startActivity(new Intent(getActivity(), SignAcitvity.class));//点击跳转页面 break;

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