Question

android中的imageview怎么设置上下左右的滑动事件？

Answer 1

private float mPosX; private float mPosY; private float mCurrentPosX; private float mCurrentPosY; private ImageView imageview; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageview = (ImageView) findViewById(R.id.imageview); imageview.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { // 按下 case MotionEvent.ACTION_DOWN: mPosX = event.getX(); mPosY = event.getY(); break; // 移动 case MotionEvent.ACTION_MOVE: mCurrentPosX = event.getX(); mCurrentPosY = event.getY(); if (mCurrentPosX - mPosX > 0 && Math.abs(mCurrentPosY - mPosY) < 10) Log.e("", "向右"); else if (mCurrentPosX - mPosX < 0 && Math.abs(mCurrentPosY - mPosY) < 10) Log.e("", "向左"); else if (mCurrentPosY - mPosY > 0 && Math.abs(mCurrentPosX - mPosX) < 10) Log.e("", "向下"); else if (mCurrentPosY - mPosY < 0 && Math.abs(mCurrentPosX - mPosX) < 10) Log.e("", "向上"); break; // 拿起 case MotionEvent.ACTION_UP: break; default: break; } return true; } }); }