【移動應(yīng)用開發(fā)技術(shù)】Android如何擴(kuò)大View的點擊區(qū)域

【移動應(yīng)用開發(fā)技術(shù)】Android如何擴(kuò)大View的點擊區(qū)域

/upload/information/20200623/125/123734.pngpublic

class

MyFrameLayout

extends

FrameLayout

implements

OnClickListener,

OnTouchListener

{

private

static

final

String

TAG

=

"Event";

public

MyFrameLayout(Context

context,

AttributeSet

attrs)

{

super(context,

attrs);

Log.d(TAG,

"MyFrameLayout

init");

setOnClickListener(this);

setOnTouchListener(this);

}

@Override

public

boolean

dispatchTouchEvent(MotionEvent

event)

{

Log.d(TAG,

"MyFrameLayout

dispatchTouchEvent

"

+

event.getAction());

return

super.dispatchTouchEvent(event);

}

@Override

public

boolean

onTouchEvent(MotionEvent

event)

{

Log.d(TAG,

"MyFrameLayout

onTouchEvent

"

+

event.getAction()

);

return

super.onTouchEvent(event);

}

@Override

public

void

onClick(View

view)

{

Log.d(TAG,

"MyFrameLayout

onClick");

}

@Override

public

boolean

onTouch(View

view,

MotionEvent

event)

{

Log.d(TAG,

"MyFrameLayout

onTouch

"

+

event.getAction());

return

true;

}

@Override

public

boolean

onInterceptTouchEvent(MotionEvent

ev)

{

Log.d(TAG,

"MyFrameLayout

onInterceptTouchEvent

"

+

ev.getAction());

return

super.onInterceptTouchEvent(ev);

}

}public

class

MyImageView

extends

ImageView

implements

OnClickListener,

OnTouchListener

{

private

static

final

String

TAG

=

"Event";

public

MyImageView(Context

context,

AttributeSet

attrs)

{

super(context,

attrs);

Log.d(TAG,

"MyImageView

init");

setOnClickListener(this);

setOnTouchListener(this);

}

@Override

public

boolean

dispatchTouchEvent(MotionEvent

event)

{

Log.d(TAG,

"MyImageView

dispatchTouchEvent

"+

event.getAction());

return

super.dispatchTouchEvent(event);

}

@Override

public

boolean

onTouchEvent(MotionEvent

event)

{

Log.d(TAG,

"MyImageView

onTouchEvent

"+

event.getAction());

return

super.onTouchEvent(event);

}

@Override

public

boolean

onTouch(View

arg0,

MotionEvent

arg1)

{

Log.d(TAG,

"MyImageView

onTouch

"

+

arg1.getAction());

return

false;

}

@Override

public

void

onClick(View

arg0)

{

Log.d(TAG,

"MyImageView

onClick");

}

}/upload/information/20200623/125/123735.png/upload/information/20200623/125/123736.pngpublic

boolean

dispatchTouchEvent(MotionEvent

ev){

boolean

consume

=

false;

if(onInterceptTouchEvent(ev)){

consume

=

onTouchEvent(ev);

}

else{

consume

=

child.dispatchTouchEvent(ev);

}

return

consume;

}public

class

TouchFactory

{

/**

擴(kuò)展垂直方向點擊區(qū)域尺寸

*/

private

static

final

int

EXT_V_SIZE

=

200;

public

static

View.OnTouchListener

creatTouchListener(){

return

new

View.OnTouchListener()

{

@Override

public

boolean

onTouch(View

v,

MotionEvent

event)

{

if

(expendTouchSize(v,

event))

{

return

true;

}

return

false;

}

};

}

public

static

boolean

expendTouchSize(View

root,

MotionEvent

event)

{

if

(root

instanceof

MyFrameLayout)

{

ImageView

view

=

((MyFrameLayout)

root).getMyImageView();

if

(view

!=

null

&&

view.getVisibility()

==

View.VISIBLE)

{

Rect

touchRect

=

new

Rect();

view.getGlobalVisibleRect(touchRect);

int

action

=

event.getAction();

float

x

=

event.getRawX();

float

y

=

event.getRawY();

if

((y

>=

touchRect.top

-

EXT_V_SIZE)

&&

(y

<=

touchRect.bottom

+

EXT_V_SIZE))

{

if

(x

>=

touchRect.left)

{

if

(action

==

MotionEvent.ACTION_UP)

{

Toast.makeText(view.getContext(),

"touch",

Toast.LENGTH_SHORT).show();

}

return

true;

}

}

}

}

return

false;

}

}public

class

MyFrameLayout

extends

FrameLayout

{

private

static

final

String

TAG

=

"Event";

private

MyImageView

myImageView;

public

MyFrameLayout(Context

context)

{

this(context,

null);

}

public

MyFrameLayout(Context

context,

AttributeSet

attrs)

{

this(context,

attrs,

0);

}

public

MyFrameLayout(Context

context,

AttributeSet

attrs,

int

def)

{

super(context,

attrs,

def);

init();

}

public

void

init()

{

this.s