1、应用内悬浮框 2、桌面悬浮框
- 1.1 实现可拖动的view，首先想到肯定是onTouchEvent()去监听手势事件
- 1.2 通过手势获取手指按下的点当做原点，然后在Move中不断计算间距。然后就可以计算位移了。
- 1.3 由于悬浮框都是相对整个屏幕的，所以获取event.getRawX/Y()获取相对屏幕的距离。
- 1.4 计算完位移，那么通过setX(),setY()来设置view在父view中的坐标（左上角）；
- 2.1 onTouchEvent()通过event.getRawX/Y()获取相对屏幕的距离。
- 2.2 view中setX/Y()设置view在父view的左上角坐标位置。
- 2.3 通过 ObjectAnimator.ofFloat(this, "x", getX(), 0); 可以改变view中自带的x的值，就是左上角的坐标。
public boolean onTouchEvent(MotionEvent event) {
//获取相对屏幕的X，Y
int rawX = (int) event.getRawX();
int rawY = (int) event.getRawY();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
Log.e(TAG, "ACTION_DOWN: ");
isMove = false;
startX = lastX = rawX;
startY = lastY = rawY;
ViewGroup parent;
if (getParent() != null) {
parent = (ViewGroup) getParent();
parentHeight = parent.getHeight();
parentWidth = parent.getWidth();
}
break;
}
return true;
} public boolean onTouchEvent(MotionEvent event) {
//获取相对屏幕的X，Y
int rawX = (int) event.getRawX();
int rawY = (int) event.getRawY();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_MOVE:
isMove = true;
Log.e(TAG, "ACTION_MOVE: ");
float x = getX() + (rawX - lastX);
float y = getY() + (rawY - lastY);
// //检测是否到达边缘 左上右下
x = x < 0 ? 0 : (x > parentWidth - getWidth() ? parentWidth - getWidth() : x);
//下边界再40dp以上
if (y < 0) {
y = 0;
} else if (y > parentHeight - getHeight() - Utils.dip2px(40)) {
y = parentHeight - getHeight() - Utils.dip2px(40);
}
setX(x);
setY(y);
lastX = rawX;
lastY = rawY;
break;
}
return true;
} public boolean onTouchEvent(MotionEvent event) {
//获取相对屏幕的X，Y
int rawX = (int) event.getRawX();
int rawY = (int) event.getRawY();
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
Log.e(TAG, "ACTION_UP: ");
int dx = (int) event.getRawX() - startX;
int dy = (int) event.getRawY() - startY;
if (Math.abs(dx) < 3 && Math.abs(dy) < 3) {
performClick();//重点，确保DragFloatActionButton2.setOnclickListener生效
break;
}
if (rawX >= parentWidth / 2) {
//靠右吸附
animate().setInterpolator(new DecelerateInterpolator())
.setDuration(500)
.xBy(parentWidth - getWidth() - getX())
.start();
} else {
//靠左吸附
ObjectAnimator oa = ObjectAnimator.ofFloat(this, "x", getX(), 0);
oa.setInterpolator(new DecelerateInterpolator());
oa.setDuration(500);
oa.start();
}
break;
}
return true;
}- 1.1 和应用内悬浮框一样，都是通过onTouchEvent来处理手指滑动。
- 1.2 只是位移算出来之后是通过WindowManager.LayoutParams.x/y来设置移动的，而不是setX/Y()了
- 1.3 显示在桌面上需要WindowManager.addView()来设置到桌面
- 1.4 windowManager需要
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/> /**
* 显示悬浮框
*
* @param view :显示的view
* @param activity
*/
public static void showDragTableButton(View view, Activity activity) {
if (mWindowManager == null) {
mWindowManager = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
}
int screenWidth = 0, screenHeight = 0;
if (mWindowManager != null) {
//获取屏幕的宽和高
Point point = new Point();
mWindowManager.getDefaultDisplay().getSize(point);
screenWidth = point.x;
screenHeight = point.y;
WindowManager.LayoutParams layoutParams = new WindowManager.LayoutParams();
layoutParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
layoutParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
//设置type
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
//26及以上必须使用TYPE_APPLICATION_OVERLAY @deprecated TYPE_PHONE
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
layoutParams.type = WindowManager.LayoutParams.TYPE_PHONE;
}
//设置flags
layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
layoutParams.gravity = Gravity.START | Gravity.TOP;
//背景设置成透明
layoutParams.format = PixelFormat.TRANSPARENT;
layoutParams.x = screenWidth;
layoutParams.y = screenHeight / 2;
//将View添加到屏幕上
mWindowManager.addView(view, layoutParams);
}
} public boolean onTouchEvent(MotionEvent event) {
//获取相对屏幕的X，Y
int rawX = (int) event.getRawX();
int rawY = (int) event.getRawY();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
startX = lastX = rawX;
startY = lastY = rawY;
break;
case MotionEvent.ACTION_MOVE:
//计算手指移动的距离
float x = rawX - lastX;
float y = rawY - lastY;
if (getLayoutParams() instanceof WindowManager.LayoutParams) {
mLayoutParams = (WindowManager.LayoutParams) getLayoutParams();
//将移动距离累加到Lp中
mLayoutParams.x += (int) x;
mLayoutParams.y += (int) y;
//将Lp设置给DragTableButton
windowManager.updateViewLayout(this, mLayoutParams);
}
lastX = rawX;
lastY = rawY;
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
int dx = (int) event.getRawX() - startX;
int dy = (int) event.getRawY() - startY;
if (Math.abs(dx) < 3 && Math.abs(dy) < 3) {
performClick();//重点，确保DragFloatActionButton2.setOnclickListener生效
break;
}
if (rawX >= screenWidth / 2) {
//靠右吸附
ObjectAnimator oa = ObjectAnimator.ofFloat(this, "lp_x", mLayoutParams.x, screenWidth - getWidth());
oa.setInterpolator(new DecelerateInterpolator());
oa.setDuration(500);
oa.start();
} else {
//靠左吸附
ObjectAnimator oa = ObjectAnimator.ofFloat(this, "lp_x", mLayoutParams.x, 0);
oa.setInterpolator(new DecelerateInterpolator());
oa.setDuration(500);
oa.start();
}
break;
}
return true;
}