Android悬浮窗实现 使用WindowManager – 圣骑士wind – 博客园

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:

 

<span style="color: #008000;">&lt;!--</span><span style="color: #008000;"> 显示顶层浮窗 </span><span style="color: #008000;">--&gt;</span>

<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

 

        <span style="color: #008000;">//</span><span style="color: #008000;"> 获取应用的Context</span>

mContext = context.getApplicationContext();

// 获取WindowManager

mWindowManager = (WindowManager) mContext

.getSystemService(Context.WINDOW_SERVICE);

 

  参数设置:

复制代码
        <span style="color: #0000ff;">final</span> WindowManager.LayoutParams params = <span style="color: #0000ff;">new</span><span style="color: #000000;"> WindowManager.LayoutParams();</span>

// 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;

复制代码

 

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:

 

<span style="color: #0000ff;">&lt;?</span><span style="color: #ff00ff;">xml version="1.0" encoding="utf-8"</span><span style="color: #0000ff;">?&gt;</span>

<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:

复制代码
        <span style="color: #008000;">//</span><span style="color: #008000;"> 点击窗口外部区域可消除</span>

// 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;

}

});

复制代码

 

  点击Back键可隐藏弹窗:

  注意Flag不能设置WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE

复制代码
        <span style="color: #008000;">//</span><span style="color: #008000;"> 点击back键可消除</span>

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;

}

}

});

复制代码

 

完整效果

  完整代码:

 

<span style="color: #0000ff;">package</span><span style="color: #000000;"> com.example.hellowindow;</span>

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

 

<span style="color: #0000ff;">package</span><span style="color: #000000;"> com.example.hellowindow;</span>

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

来源URL:http://www.cnblogs.com/mengdd/p/3824782.html