来源 http://www.cnblogs.com/mengdd/p/3824782.html
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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:
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"?>
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" >
- 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" >
- 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" />
- 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" />
- 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" />
- 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" >
- 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" />
- 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" />
- 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:
MainActivity
- 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);
- }
- });
- }
- }
WindowUtils
- 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;
- }
- }
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