首页 > 代码库 > Android悬浮窗实现 使用WindowManager

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