1 问题

我们需要在Activity里面监听网络变化、热点是否开启和关闭、GPS服务是否开启、位置权限是否开启等一些列行为。

2 思路

方法一：

如果是需要启动activity进行权限申请，我们可以用如下组合模式

var intent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)

startActivityForResult(intent, REQUEST_GPS_CODE)

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {

super.onActivityResult(requestCode, resultCode, data)

Log.i(TAG, "onActivityResult start requestCode is:" + requestCode)

//Android8.0以上版本

if (requestCode == REQUEST_GPS_CODE) {

}

}

方法二：

我们在onResume里面进行权限检测

方法三：

注册广播来进行监听

方法四：

利用handler.postDelayed实现定时器，然后定时检测权限

/**

* 检查是否满足条件让按钮变蓝色的定时器

*/

inner class CheckCondition : Runnable {

var context: Context? = null

var type: String? = null

constructor(context: Context, type: String) {

this.context = context

this.type = type

}

override fun run() {

var result = false

result = condition(type!!)

Log.i(TAG, "CheckCondition result is:$result")

if (result) {

nextCreateWifAp.isEnabled = true

} else {

nextCreateWifAp.isEnabled = false

}

handler!!.postDelayed(this, 1000)

}

}

checkCondition = CheckCondition(this, ANDROID_VERSION_SIX_TO_SEVEN)

handler.postDelayed(checkCondition, TIME_TITERVAL)

方法五：

在onWindowFocusChanged函数里面检测，比如切换页面，滑动菜单栏，都能触发到，方案最理想，基本上能满足你的需求。

override fun onWindowFocusChanged(hasFocus: Boolean) {

super.onWindowFocusChanged(hasFocus)

Log.i(TAG, "onWindowFocusChanged----------------------->")

var result = false

handler.postDelayed(Runnable {

result = condition(currentType)

Log.i(TAG, "CheckCondition result is:$result")

if (result) {

nextCreateWifAp.isEnabled = true

} else {

nextCreateWifAp.isEnabled = false

}

}, 1000)

}