【移动应用开发技术】android6.0版本中怎么实现一个悬浮窗口

【移动应用开发技术】android6.0版本中怎么实现一个悬浮窗口

这篇文章将为大家详细讲解有关android6.0版本中怎么实现一个悬浮窗口，文章内容质量较高，因此在下分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。代码如下：public

class

MainActivity

extends

AppCompatActivity

{

private

static

final

int

ALERT_WINDOW_PERMISSION_CODE

=

100;

private

Button

start_float;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

start_float

=

(Button)

findViewById(R.id.start_float);

this.start_float.setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

view)

{

if

(Build.VERSION.SDK_INT

>

22)

{

sdk23Permission();

}

else

{

startService(new

Intent(MainActivity.this,

FloatService.class));

finish();

}

}

});

}

/**

*

@description

安卓6.0下权限处理

*

@author

ldm

*

@time

2017/3/20

15:00

*/

public

void

sdk23Permission()

{

if

(!Settings.canDrawOverlays(this))

{

Toast.makeText(MainActivity.this,

"当前无权限使用悬浮窗，请授权！",

Toast.LENGTH_SHORT).show();

Intent

intent

=

new

Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,

Uri.parse("package:"

+

getPackageName()));

startActivityForResult(intent,

ALERT_WINDOW_PERMISSION_CODE);

}

else

{

startService(new

Intent(MainActivity.this,

FloatService.class));

finish();

}

}

/**

*

用户返回

*/

protected

void

onActivityResult(int

requestCode,

int

resultCode,

Intent

data)

{

if

(requestCode

==

ALERT_WINDOW_PERMISSION_CODE)

{

if

(!Settings.canDrawOverlays(this))

{

Toast.makeText(MainActivity.this,

"权限授予失败，无法开启悬浮窗",

Toast.LENGTH_SHORT).show();

}

else

{

startService(new

Intent(MainActivity.this,

FloatService.class));

finish();

}

}

}

}对应Service:public

class

FloatService

extends

Service

{

@Nullable

@Override

public

IBinder

onBind(Intent

intent)

{

return

null;

}

@Override

public

void

onCreate()

{

FloatViewUtils.getInstance(this).addFloatView();

super.onCreate();

}

}简单地FloatView:public

class

FloatView

extends

View

{

public

static

final

int

WIDTH

=

150;

public

static

final

int

HEIGHT

=

150;

private

Paint

circlePaint;

private

Paint

textPaint;

private

static

final

String

text

=

"50%";

public

FloatView(Context

context)

{

this(context,

null,

0);

}

public

FloatView(Context

context,

@Nullable

AttributeSet

attrs)

{

this(context,

attrs,

0);

}

public

FloatView(Context

context,

@Nullable

AttributeSet

attrs,

int

defStyleAttr)

{

super(context,

attrs,

defStyleAttr);

initPaints();

}

/**

*

@description

初始化相关画笔Paint

*

@author

ldm

*

@time

2017/3/20

*/

private

void

initPaints()

{

circlePaint

=

new

Paint();

circlePaint.setAntiAlias(true);

circlePaint.setColor(Color.GRAY);

textPaint

=

new

Paint();

//设置抗锯齿

textPaint.setAntiAlias(true);

//设置字体大小

textPaint.setTextSize(30);

//设置颜色

textPaint.setColor(Color.WHITE);

//设置（仿）粗体

textPaint.setFakeBoldText(true);

}

@Override

protected

void

onMeasure(int

widthMeasureSpec,

int

heightMeasureSpec)

{

setMeasuredDimension(WIDTH,

HEIGHT);

}

@Override

protected

void

onDraw(Canvas

canvas)

{

super.onDraw(canvas);

canvas.drawCircle(WIDTH

/

2,

HEIGHT

/

2,

WIDTH

/

2,

circlePaint);

float

textWidth

=

textPaint.measureText(text);

float

x

=

WIDTH

/

2

-

textWidth

/

2;

Paint.FontMetrics

fms

=

textPaint.getFontMetrics();

float

dy

=

-(fms.descent

+

fms.ascent)

/

2;

float

y

=

HEIGHT

/

2

+

dy;

canvas.drawText(text,

x,

y,

textPaint);

}

}以及FloatView管理工具类：public

class

FloatViewUtils

{

private

static

FloatViewUtils

instance;

private

Context

mContext;

private

WindowManager

manager;

private

FloatView

floatView;

private

FloatViewUtils(Context

mContext)

{

this.mContext

=

mContext;

manager

=

(WindowManager)

mContext.getSystemService(Context.WINDOW_SERVICE);

floatView

=

new

FloatView(mContext);

}

public

static

FloatViewUtils

getInstance(Context

mContext)

{

if

(null

==

instance)

{

synchronized

(FloatViewUtils.class)

{

if

(null

==

instance)

{

instance

=

new

FloatViewUtils(mContext);

}

}

}

return

instance;

}

public

void

addFloatView()

{

WindowManager.LayoutParams

lp

=

new

WindowManager.LayoutParams();

//悬浮窗口大小

lp.width

=

floatView.WIDTH;

lp.height

=

floatView.HEIGHT;

//

调整悬浮窗口位置

lp.gravity

=

Gravity.LEFT

|

Gravity.CENTER;

//

以屏幕左上角为原点，设置x、y初始值

//

lp.x

=

0;

//

lp.y

=

0;

//设置悬浮窗口类型

lp.type

=

WindowManager.LayoutParams.TYPE_PHONE;

//设置悬浮窗口不接受焦点及触摸事件

lp.flags

=

WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

|

WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;

//设置图片格式，效果为背景透明

lp.format

=

PixelFormat.RGB