【移动应用开发技术】Android中怎么自定义一个全局悬浮按钮

【移动应用开发技术】Android中怎么自定义一个全局悬浮按钮

本篇文章给大家分享的是有关Android中怎么自定义一个全局悬浮按钮，在下觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着在下一起来看看吧。一、首先因为悬浮窗式的所以要添加权限,对于SDK>=23的需要动态获取权限,我这边用的是22的

<uses-permission

android:name="android.permission.SYSTEM_ALERT_WINDOW"

/>

<uses-permission

android:name="android.permission.WRITE_SETTINGS"/>二、通过application获取到全局性的WindowManager的params数据

private

WindowManager.LayoutParams

wmParams=new

WindowManager.LayoutParams();

public

WindowManager.LayoutParams

getMywmParams(){

return

wmParams;

}三、自定义ImageView,并实现点击具有状态选择.其中写了一个回调接口用于对点击事件的处理public

class

CustomeMovebutton

extends

ImageView

{

private

final

int

statusHeight;

int

sW;

int

sH;

private

float

mTouchStartX;

private

float

mTouchStartY;

private

float

x;

private

float

y;

private

boolean

isMove=false;

private

Context

context;

private

WindowManager

wm

=

(WindowManager)

getContext().getApplicationContext().getSystemService(Context.WINDOW_SERVICE);

private

WindowManager.LayoutParams

wmParams

=

((MyApplication)

getContext().getApplicationContext()).getMywmParams();

private

float

mLastX;

private

float

mLastY;

private

float

mStartX;

private

float

mStartY;

private

long

mDownTime;

private

long

mUpTime;

private

OnSpeakListener

listener;

public

CustomeMovebutton(Context

context)

{

this(context,null);

this.context

=

context;

}

public

CustomeMovebutton(Context

context,

AttributeSet

attrs)

{

this(context,

attrs,-1);

}

public

CustomeMovebutton(Context

context,

AttributeSet

attrs,

int

defStyleAttr)

{

super(context,

attrs,defStyleAttr);

sW

=

wm.getDefaultDisplay().getWidth();

sH

=

wm.getDefaultDisplay().getHeight();

statusHeight

=

getStatusHeight(context);

}

/**

*

状态栏的高度

*

*/

public

static

int

getStatusHeight(Context

context)

{

int

statusHeight

=

-1;

try

{

Class

clazz

=

Class.forName("ernal.R$dimen");

//使用反射获取实例

Object

object

=

clazz.newInstance();

int

height

=

Integer.parseInt(clazz.getField("status_bar_height")

.get(object).toString());

statusHeight

=

context.getResources().getDimensionPixelSize(height);

}

catch

(Exception

e)

{

e.printStackTrace();

}

return

statusHeight;

}

@Override

public

boolean

onTouchEvent(MotionEvent

event)

{

//获取相对屏幕的坐标，即以屏幕左上角为原点

x

=

event.getRawX();

y

=

event.getRawY()

-

statusHeight;

//statusHeight是系统状态栏的高度

switch

(event.getAction())

{

case

MotionEvent.ACTION_DOWN:

//按下

setImageResource(R.drawable.btn_voice_pressed);

mTouchStartX

=

event.getX();

mTouchStartY

=

event.getY();

mStartX

=

event.getRawX();

mStartY

=

event.getRawY();

mDownTime

=

System.currentTimeMillis();

isMove

=

false;

break;

case

MotionEvent.ACTION_MOVE:

//手指移动

updateViewPosition();

isMove

=

true;

break;

case

MotionEvent.ACTION_UP:

//手抬起

setImageResource(R.drawable.btn_voice_rest);

mLastX

=

event.getRawX();

mLastY

=

event.getRawY();

mUpTime

=

System.currentTimeMillis();

//按下到抬起的时间大于500毫秒,并且抬手到抬手绝对值大于20像素处理点击事件

if(mUpTime

-

mDownTime

<

500){

if(Math.abs(mStartX-

mLastX

)<

20.0

&&

Math.abs(mStartY

-

mLastY)

<

20.0){

if

(listener!=null){

listener.onSpeakListener();

}

}

}

break;

}

return

true;

}

private

void

updateViewPosition()

{

wmParams.x

=

(int)

(x

-

mTouchStartX);

wmParams.y

=

(int)

(y-

mTouchStartY);

wm.updateViewLayout(this,

wmParams);

//刷新显示

}

/**

*

设置点击回调接口

*/

public

interface

OnSpeakListener{

void

onSpeakListener();

}

public

void

setOnSpeakListener(OnSpeakListener

listener){

this.listener=listener;

}

}四、Activity中使用,其中有设置图片的参数和位置参数public

class

MainActivity

extends

AppCompatActivity{

private

WindowManager

wm;

private

WindowManager.LayoutParams

wmParams;

private

CustomeMovebutton

CustomeMovebutton;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

wm

=

(WindowManager)

getApplicationContext().getSystemService(Context.WINDOW_SERVICE);

DisplayMetrics

dm

=

getResources().getDisplayMetrics();

int

widthPixels

=

dm.widthPixels;

int

heightPixels

=

dm.heightPixels;

wmParams

=

((MyApplication)

getApplication()).getMywmParams();

wmParams.type

=

WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;

wmParams.format=

PixelFormat.RGBA_8888;//设置背景图片

wmParams.flags=

WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL

|

WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

;//

wmParams.gravity

=

Gravity.LEFT|Gravity.TOP;//

wmParams.x

=

widthPixels-150;

//设置位置像素

wmParams.y

=

heightPixels-110;

wmParams.width=200;

//设置图片大小

wmParams.height=200;

CustomeMovebutton

=

new

CustomeMovebutton(getApplicationContext());

CustomeMovebutton.setImageResource(R.drawable.btn_voice_rest);

wm.addView(CustomeMovebutton,

wmParams);

CustomeMovebutton.setOnSpeakListener(new

CustomeMovebutton.OnSpeakListener()

{

@Override

public

void