因?yàn)樽罱椖康男枰枰獙?shí)現(xiàn)一個拖動效果，看了一下網(wǎng)上剛好有這種拖動效果的demo,代碼大概如下：
private void initListener(){ screenWidth = getScreenWidth(this);//獲取屏幕寬度 screenHeight = getScreenHeight(this) - getStatusHeight(MainActivity.this);//屏幕高度-狀態(tài)欄 testTv.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); break; case MotionEvent.ACTION_MOVE: int dx = (int) event.getRawX() - lastX; int dy = (int) event.getRawY() - lastY; int top = v.getTop() + dy; int left = v.getLeft() + dx; if (top <= 0) { top = 0; } if (top >= screenHeight - testTv.getHeight() ) { top = screenHeight - testTv.getHeight(); } if (left >= screenWidth - testTv.getWidth()) { left = screenWidth - testTv.getWidth(); } if (left <= 0) { left = 0; } v.layout(left, top, left+v.getWidth(), top+v.getHeight()); v.postInvalidate(); lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); break; case MotionEvent.ACTION_UP: break; } return true;//這里根據(jù)項目需要選擇false與true } }); }可是我的項目本身是有涂鴉的界面，還有很多復(fù)雜的事件，發(fā)現(xiàn)會有很奇怪的效果，抖動很厲害，而且時不時回到原來的位置，后來發(fā)現(xiàn)這個v.layout(left, top, left+v.getWidth(), top+v.getHeight());可能不適合項目的需求，所以我想了另一種解法。代碼如下：
private void initListener(){ screenWidth = getScreenWidth(this);//獲取屏幕寬度 screenHeight = getScreenHeight(this) - getStatusHeight(MainActivity.this);//屏幕高度-狀態(tài)欄 testTv.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); break; case MotionEvent.ACTION_MOVE: int dx = (int) event.getRawX() - lastX; int dy = (int) event.getRawY() - lastY; int top = v.getTop() + dy; int left = v.getLeft() + dx; if (top <= 0) { top = 0; } if (top >= screenHeight - testTv.getHeight() ) { top = screenHeight - testTv.getHeight(); } if (left >= screenWidth - testTv.getWidth()) { left = screenWidth - testTv.getWidth(); } if (left <= 0) { left = 0; } RelativeLayout.LayoutParams param = new RelativeLayout.LayoutParams(v.getWidth(), v.getHeight()); param.leftMargin = left; param.topMargin = top; v.setLayoutParams(param);// v.layout(left, top, left+v.getWidth(), top+v.getHeight()); v.postInvalidate(); lastX = (int) event.getRawX(); lastY = (int) event.getRawY(); break; case MotionEvent.ACTION_UP: break; } return true; } }); }效果如下圖：
覺得可以了，不過要注意一些事項：鍵盤彈出需要自己處理一下（比如處理成彈出鍵盤就不能移動這些，不然會變形的），我覺得這種寫法可以應(yīng)用于各種復(fù)雜的場景。好了，今天一些項目問題總結(jié)就到這里了，希望對大家有幫助，代碼也上傳了，地址如下:Android實(shí)現(xiàn)拖動效果
以上所述是小編給大家介紹Android實(shí)現(xiàn)拖動效果，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對武林網(wǎng)網(wǎng)站的支持！
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