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[最新] Android悬浮窗实现 使用WindowManager

zhengxiuchen86 3月前 1

原文地址为:Android悬浮窗实现 使用WindowManager

 

Android悬浮窗实现 使用WindowManager

 

WindowManager介绍

  通过Context.getSystemService(Context.WINDOW_SERVICE)可以获得 WindowManager对象。

  每一个WindowManager对象都和一个特定的 Display绑定。

  想要获取一个不同的display的WindowManager,可以用 createDisplayContext(Display)来获取那个display的 Context,之后再使用:

  Context.getSystemService(Context.WINDOW_SERVICE)来获取WindowManager。

 

  使用WindowManager可以在其他应用最上层,甚至手机桌面最上层显示窗口。

  调用的是WindowManager继承自基类的addView方法和removeView方法来显示和隐藏窗口。具体见后面的实例。

 

  另:API 17推出了Presentation,它将自动获取display的Context和WindowManager,可以方便地在另一个display上显示窗口。

 

WindowManager实现悬浮窗例子

声明权限

  首先在manifest中添加如下权限:

<!-- 显示顶层浮窗 -->
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

  

  注意:在MIUI上需要在设置中打开本应用的”显示悬浮窗”开关,并且重启应用,否则悬浮窗只能显示在本应用界面内,不能显示在手机桌面上。

 

服务获取和基本参数设置

        // 获取应用的Context
mContext = context.getApplicationContext();
// 获取WindowManager
mWindowManager = (WindowManager) mContext
.getSystemService(Context.WINDOW_SERVICE);

  参数设置:

        final WindowManager.LayoutParams params = new WindowManager.LayoutParams();

// 类型
params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;

// WindowManager.LayoutParams.TYPE_SYSTEM_ALERT

// 设置flag

int flags = WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
// | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
// 如果设置了WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,弹出的View收不到Back键的事件
params.flags = flags;
// 不设置这个弹出框的透明遮罩显示为黑色
params.format = PixelFormat.TRANSLUCENT;
// FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口
// 设置 FLAG_NOT_FOCUSABLE 悬浮窗口较小时,后面的应用图标由不可长按变为可长按
// 不设置这个flag的话,home页的划屏会有问题

params.width
= LayoutParams.MATCH_PARENT;
params.height
= LayoutParams.MATCH_PARENT;

params.gravity
= Gravity.CENTER;

 

点击和按键事件

  除了View中的各个控件的点击事件之外,弹窗View的消失控制需要一些处理。

  点击弹窗外部可隐藏弹窗的效果,首先,悬浮窗是全屏的,只不过最外层的是透明或者半透明的:

  布局如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width
="match_parent"
android:layout_height
="match_parent"
android:layout_gravity
="center"
android:background
="@color/darken_background"
android:gravity
="center"
android:orientation
="vertical" >

<RelativeLayout
android:id="@+id/popup_window"
android:layout_width
="@dimen/dialog_window_width"
android:layout_height
="@dimen/dialog_window_height"
android:background
="@color/white"
android:orientation
="vertical" >

<TextView
android:id="@+id/title"
android:layout_width
="match_parent"
android:layout_height
="@dimen/dialog_title_height"
android:gravity
="center"
android:text
="@string/default_title"
android:textColor
="@color/dialog_title_text_color"
android:textSize
="@dimen/dialog_title_text_size" />

<View
android:id="@+id/title_divider"
android:layout_width
="match_parent"
android:layout_height
="2dp"
android:layout_below
="@id/title"
android:background
="@drawable/dialog_title_divider" />

<TextView
android:id="@+id/content"
android:layout_width
="match_parent"
android:layout_height
="wrap_content"
android:layout_below
="@id/title_divider"
android:gravity
="center"
android:padding
="@dimen/dialog_content_padding_side"
android:text
="@string/default_content"
android:textColor
="@color/dialog_content_text_color"
android:textSize
="@dimen/dialog_content_text_size" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height
="wrap_content"
android:layout_alignParentBottom
="true"
android:orientation
="horizontal"
android:paddingBottom
="@dimen/dialog_content_padding_bottom"
android:paddingLeft
="@dimen/dialog_content_padding_side"
android:paddingRight
="@dimen/dialog_content_padding_side" >

<Button
android:id="@+id/negativeBtn"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:layout_weight
="1"
android:background
="@drawable/promote_window_negative_btn_selector"
android:focusable
="true"
android:padding
="@dimen/dialog_button_padding"
android:text
="@string/default_btn_cancel"
android:textColor
="@color/dialog_negative_btn_text_color"
android:textSize
="@dimen/dialog_button_text_size" />

<Button
android:id="@+id/positiveBtn"
android:layout_width
="wrap_content"
android:layout_height
="wrap_content"
android:layout_marginLeft
="18dp"
android:layout_weight
="1"
android:background
="@drawable/promote_window_positive_btn_selector"
android:focusable
="true"
android:padding
="@dimen/dialog_button_padding"
android:text
="@string/default_btn_ok"
android:textColor
="@color/dialog_positive_btn_text_color"
android:textSize
="@dimen/dialog_button_text_size" />
</LinearLayout>
</RelativeLayout>

</LinearLayout>
popupwindow.xml

 

  点击外部可消除设置:

        // 点击窗口外部区域可消除
// 这点的实现主要将悬浮窗设置为全屏大小,外层有个透明背景,中间一部分视为内容区域
// 所以点击内容区域外部视为点击悬浮窗外部
final View popupWindowView = view.findViewById(R.id.popup_window);// 非透明的内容区域

view.setOnTouchListener(
new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {

LogUtil.i(LOG_TAG,
"onTouch");
int x = (int) event.getX();
int y = (int) event.getY();
Rect rect
= new Rect();
popupWindowView.getGlobalVisibleRect(rect);
if (!rect.contains(x, y)) {
WindowUtils.hidePopupWindow();
}

LogUtil.i(LOG_TAG,
"onTouch : " + x + ", " + y + ", rect: "
+ rect);
return false;
}
});

 

  点击Back键可隐藏弹窗:

  注意Flag不能设置WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

        // 点击back键可消除
view.setOnKeyListener(new OnKeyListener() {

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
WindowUtils.hidePopupWindow();
return true;
default:
return false;
}
}
});

 

完整效果

  完整代码:

package com.example.hellowindow;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity {

private Handler mHandler = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mHandler
= new Handler();

Button button
= (Button) findViewById(R.id.button);
button.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {

mHandler.postDelayed(
new Runnable() {

@Override
public void run() {
WindowUtils.showPopupWindow(MainActivity.
this);

}
},
1000 * 3);

}
});
}
}
MainActivity
package com.example.hellowindow;

import android.content.Context;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.view.WindowManager.LayoutParams;
import android.widget.Button;

/**
* 弹窗辅助类
*
* @ClassName WindowUtils
*
*
*/
public class WindowUtils {

private static final String LOG_TAG = "WindowUtils";
private static View mView = null;
private static WindowManager mWindowManager = null;
private static Context mContext = null;

public static Boolean isShown = false;

/**
* 显示弹出框
*
*
@param context
*
@param view
*/
public static void showPopupWindow(final Context context) {
if (isShown) {
LogUtil.i(LOG_TAG,
"return cause already shown");
return;
}

isShown
= true;
LogUtil.i(LOG_TAG,
"showPopupWindow");

// 获取应用的Context
mContext = context.getApplicationContext();
// 获取WindowManager
mWindowManager = (WindowManager) mContext
.getSystemService(Context.WINDOW_SERVICE);

mView
= setUpView(context);

final WindowManager.LayoutParams params = new WindowManager.LayoutParams();

// 类型
params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;

// WindowManager.LayoutParams.TYPE_SYSTEM_ALERT

// 设置flag

int flags = WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
// | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
// 如果设置了WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,弹出的View收不到Back键的事件
params.flags = flags;
// 不设置这个弹出框的透明遮罩显示为黑色
params.format = PixelFormat.TRANSLUCENT;
// FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口
// 设置 FLAG_NOT_FOCUSABLE 悬浮窗口较小时,后面的应用图标由不可长按变为可长按
// 不设置这个flag的话,home页的划屏会有问题

params.width
= LayoutParams.MATCH_PARENT;
params.height
= LayoutParams.MATCH_PARENT;

params.gravity
= Gravity.CENTER;

mWindowManager.addView(mView, params);

LogUtil.i(LOG_TAG,
"add view");

}

/**
* 隐藏弹出框
*/
public static void hidePopupWindow() {
LogUtil.i(LOG_TAG,
"hide " + isShown + ", " + mView);
if (isShown && null != mView) {
LogUtil.i(LOG_TAG,
"hidePopupWindow");
mWindowManager.removeView(mView);
isShown
= false;
}

}

private static View setUpView(final Context context) {

LogUtil.i(LOG_TAG,
"setUp view");

View view
= LayoutInflater.from(context).inflate(R.layout.popupwindow,
null);
Button positiveBtn
= (Button) view.findViewById(R.id.positiveBtn);
positiveBtn.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {

LogUtil.i(LOG_TAG,
"ok on click");
// 打开安装包
// 隐藏弹窗
WindowUtils.hidePopupWindow();

}
});

Button negativeBtn
= (Button) view.findViewById(R.id.negativeBtn);
negativeBtn.setOnClickListener(
new OnClickListener() {

@Override
public void onClick(View v) {
LogUtil.i(LOG_TAG,
"cancel on click");
WindowUtils.hidePopupWindow();

}
});

// 点击窗口外部区域可消除
// 这点的实现主要将悬浮窗设置为全屏大小,外层有个透明背景,中间一部分视为内容区域
// 所以点击内容区域外部视为点击悬浮窗外部
final View popupWindowView = view.findViewById(R.id.popup_window);// 非透明的内容区域

view.setOnTouchListener(
new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {

LogUtil.i(LOG_TAG,
"onTouch");
int x = (int) event.getX();
int y = (int) event.getY();
Rect rect
= new Rect();
popupWindowView.getGlobalVisibleRect(rect);
if (!rect.contains(x, y)) {
WindowUtils.hidePopupWindow();
}

LogUtil.i(LOG_TAG,
"onTouch : " + x + ", " + y + ", rect: "
+ rect);
return false;
}
});

// 点击back键可消除
view.setOnKeyListener(new OnKeyListener() {

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
WindowUtils.hidePopupWindow();
return true;
default:
return false;
}
}
});

return view;

}
}
WindowUtils

 

 

 

参考资料

  WindowManager:

  http://developer.android.com/reference/android/view/WindowManager.html

 

  参考实例:

  http://blog.csdn.net/deng0zhaotai/article/details/16827719

  http://www.xsmile.net/?p=538

  http://blog.csdn.net/guolin_blog/article/details/8689140

 

  简单说明:

  Android之Window、WindowManager与窗口管理:

  http://blog.csdn.net/xieqibao/article/details/6567814

 

  Android系统服务-WindowManager:

  http://blog.csdn.net/chenyafei617/article/details/6577940

 

  进一步的学习:

  老罗的Android之旅:

  Android Activity的窗口对象Window的创建过程分析:

  http://blog.csdn.net/luoshengyang/article/details/8223770

  窗口管理服务WindowManagerService的简要介绍和学习计划:

  http://blog.csdn.net/luoshengyang/article/details/8462738

 

  Android核心分析之窗口管理:

  http://blog.csdn.net/maxleng/article/details/5557758

 


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