第一种 需要权限的悬浮窗：
权限：
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>禁用事件：
layoutParams.flags =
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;不禁用事件：
//不影响悬浮覆盖的view所以事件，单纯的是个盖板，就像护眼宝一样
layoutParams.flags =
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;全屏设置：
layoutParams.flags =
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
?//屏幕不限制 ? 高度layoutParams.height = 5000超过手机屏幕高度都可
layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT+5000;
不全屏（状态栏不会被覆盖）：
layoutParams.flags =
WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
?//屏幕不限制 ? 高度layoutParams.height = 5000超过手机屏幕高度都可
layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT;
组合 1 全屏，不禁用事件：
效果：不影响手机滑动以及任何操作
layoutParams.flags =
//不影响悬浮覆盖的view所以事件，单纯的是个盖板，就像护眼宝一样
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
//屏幕不限制 高度layoutParams.height = 5000超过手机屏幕高度都可
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
//屏幕不限制 高度layoutParams.height = 5000超过手机屏幕高度都可
layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT+5000;
代码：
package com.hlz.mytools;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.os.Build;
import android.provider.Settings;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import static android.content.Context.WINDOW_SERVICE;
public class FloatWindowManager {
private volatile static FloatWindowManager instance = null;
private Activity mAct;
private WindowManager windowManager;
private WindowManager.LayoutParams layoutParams;
private View view;
private FloatWindowManager(Activity activity) {
this.mAct = activity;
init(mAct);
}
private void init(Activity activity) {
windowManager = (WindowManager) activity.getSystemService(WINDOW_SERVICE);
layoutParams = new WindowManager.LayoutParams();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
// layoutParams.type = WindowManager.LayoutParams.TYPE_PHONE;
layoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
}
layoutParams.format = PixelFormat.RGBA_8888;
layoutParams.gravity = Gravity.CENTER;
layoutParams.alpha = 0.5f;
// layoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
layoutParams.flags =
//不影响悬浮覆盖的view所以事件，单纯的是个盖板，就像护眼宝一样
WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE |
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
//屏幕不限制 高度layoutParams.height = 5000超过手机屏幕高度都可
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
// WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
// WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |
// WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH |
//
// WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN |
// WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT;
layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT+5000;
}
public static FloatWindowManager getInstance(Activity mAct) {
if (instance == null) {
synchronized (FloatWindowManager.class) {
if (instance == null) {
instance = new FloatWindowManager(mAct);
}
}
}
return instance;
}
@SuppressLint("NewApi")
public void showFloatingWindow() {
if (Settings.canDrawOverlays(mAct)) {
view = new View(mAct.getApplicationContext());
view.setBackgroundColor(Color.BLACK);
windowManager.addView(view, layoutParams);
}
}
public void hideFloatingWindow() {
if (null != view && windowManager != null) {
windowManager.removeViewImmediate(view);
}
}
}
第二种 不需要权限悬浮：
用kotlin实现代码：
package com.bjx.bjxcommon.view
import android.annotation.SuppressLint
import android.app.Activity
import android.app.Application
import android.graphics.Color
import android.os.Bundle
import android.view.View
import android.view.ViewGroup
import java.lang.ref.WeakReference
class FloatViewManager constructor(activity: Activity, val isOpen: Boolean = false) {
private var view: View? = null
private var isFirstInit = true
private val context by lazy { WeakReference(activity).get() }
init {
if (isOpen) {
init()
}
}
@SuppressLint("NewApi")
fun init() {
if (!isFirstInit) return
isFirstInit = false
context?.registerActivityLifecycleCallbacks(object :
Application.ActivityLifecycleCallbacks {
override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
}
override fun onActivityStarted(activity: Activity) {
}
override fun onActivityResumed(activity: Activity) {
addView()
}
override fun onActivityPaused(activity: Activity) {
}
override fun onActivityStopped(activity: Activity) {
}
override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
}
override fun onActivityDestroyed(activity: Activity) {
view?.let {
removeView(it)
}
view = null
context?.unregisterActivityLifecycleCallbacks(this)
}
})
}
fun update() {
}
fun addView() {
if (isAdd()) return
context?.let { context ->
view = View(context)
view?.let {
it.setBackgroundColor(Color.BLACK)
it.alpha = 0.4f
val vg = context.window.decorView
when (vg) {
is ViewGroup -> {
vg.addView(
it,
ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT
)
)
}
}
}
}
}
fun removeView(view: View) {
context?.let {
val vg = it.window.decorView
when (vg) {
is ViewGroup -> {
if (isAdd()) {
vg.removeView(view)
}
}
}
}
}
fun isAdd(): Boolean {
if (context == null) return false
val vg = context!!.window.decorView
when (vg) {
is ViewGroup -> {
if (vg.childCount > 0) {
for (i in 0..vg.childCount - 1) {
val v = vg.getChildAt(i)
if (v == view) {
return true
}
}
}
}
}
return false
}
}在BaseActivity中调用：
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
//FloatViewManager 内部会自动注销回收，无需在Activity中释放了
FloatViewManager(this,true)
}