悬浮窗开发Demo

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像360悬浮窗,悬浮在窗口上,点击小的悬浮框,显示大悬浮框,打悬浮框中关闭悬浮框或者退出悬浮。
1、MainActivity

import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Button startFloatWindow = (Button) findViewById(R.id.start_float_window);        startFloatWindow.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View arg0) {                Intent intent = new Intent(MainActivity.this, FloatWindowService.class);                startService(intent);                finish();            }        });    }}====================XML======================<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    tools:context=".MainActivity" >    <Button        android:id="@+id/start_float_window"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="Start Float Window" >    </Button></RelativeLayout>

2、FloatWindowService

import android.app.ActivityManager;import android.app.ActivityManager.RunningTaskInfo;import android.app.Service;import android.content.Context;import android.content.Intent;import android.content.pm.PackageManager;import android.content.pm.ResolveInfo;import android.os.Handler;import android.os.IBinder;import java.util.ArrayList;import java.util.List;import java.util.Timer;import java.util.TimerTask;public class FloatWindowService extends Service {    /**     * 用于在线程中创建或移除悬浮窗。     */    private Handler handler = new Handler();    /**     * 定时器,定时进行检测当前应该创建还是移除悬浮窗。     */    private Timer timer;    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        // 开启定时器,每隔0.5秒刷新一次        if (timer == null) {            timer = new Timer();            timer.scheduleAtFixedRate(new RefreshTask(), 0, 500);        }        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onDestroy() {        super.onDestroy();        // Service被终止的同时也停止定时器继续运行        timer.cancel();        timer = null;    }    class RefreshTask extends TimerTask {        @Override        public void run() {            // 当前界面是桌面,且没有悬浮窗显示,则创建悬浮窗。            if (isHome() && !MyWindowManager.isWindowShowing()) {                handler.post(new Runnable() {                    @Override                    public void run() {                        MyWindowManager.createSmallWindow(getApplicationContext());                    }                });            }            // 当前界面不是桌面,且有悬浮窗显示,则移除悬浮窗。            else if (!isHome() && MyWindowManager.isWindowShowing()) {                handler.post(new Runnable() {                    @Override                    public void run() {                        MyWindowManager.removeSmallWindow(getApplicationContext());                        MyWindowManager.removeBigWindow(getApplicationContext());                    }                });            }            // 当前界面是桌面,且有悬浮窗显示,则更新内存数据。            else if (isHome() && MyWindowManager.isWindowShowing()) {                handler.post(new Runnable() {                    @Override                    public void run() {                        MyWindowManager.updateUsedPercent(getApplicationContext());                    }                });            }        }    }    /**     * 判断当前界面是否是桌面     */    private boolean isHome() {        ActivityManager mActivityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);        List<RunningTaskInfo> rti = mActivityManager.getRunningTasks(1);        return getHomes().contains(rti.get(0).topActivity.getPackageName());    }    /**     * 获得属于桌面的应用的应用包名称     *      * @return 返回包含所有包名的字符串列表     */    private List<String> getHomes() {        List<String> names = new ArrayList<String>();        PackageManager packageManager = this.getPackageManager();        Intent intent = new Intent(Intent.ACTION_MAIN);        intent.addCategory(Intent.CATEGORY_HOME);        List<ResolveInfo> resolveInfo = packageManager.queryIntentActivities(intent,                PackageManager.MATCH_DEFAULT_ONLY);        for (ResolveInfo ri : resolveInfo) {            names.add(ri.activityInfo.packageName);        }        return names;    }}

3、MyWindowManager

import android.app.ActivityManager;import android.content.Context;import android.graphics.PixelFormat;import android.view.Gravity;import android.view.WindowManager;import android.view.WindowManager.LayoutParams;import android.widget.TextView;import java.io.BufferedReader;import java.io.FileReader;import java.io.IOException;public class MyWindowManager {    /**     * 小悬浮窗View的实例     */    private static FloatWindowSmallView smallWindow;    /**     * 大悬浮窗View的实例     */    private static FloatWindowBigView bigWindow;    /**     * 小悬浮窗View的参数     */    private static LayoutParams smallWindowParams;    /**     * 大悬浮窗View的参数     */    private static LayoutParams bigWindowParams;    /**     * 用于控制在屏幕上添加或移除悬浮窗     */    private static WindowManager mWindowManager;    /**     * 用于获取手机可用内存     */    private static ActivityManager mActivityManager;    /**     * 创建一个小悬浮窗。初始位置为屏幕的右部中间位置。     *      * @param context     *            必须为应用程序的Context.     */    public static void createSmallWindow(Context context) {        WindowManager windowManager = getWindowManager(context);        int screenWidth = windowManager.getDefaultDisplay().getWidth();        int screenHeight = windowManager.getDefaultDisplay().getHeight();        if (smallWindow == null) {            smallWindow = new FloatWindowSmallView(context);            if (smallWindowParams == null) {                smallWindowParams = new LayoutParams();                smallWindowParams.type = LayoutParams.TYPE_PHONE;                smallWindowParams.format = PixelFormat.RGBA_8888;                smallWindowParams.flags = LayoutParams.FLAG_NOT_TOUCH_MODAL                        | LayoutParams.FLAG_NOT_FOCUSABLE;                smallWindowParams.gravity = Gravity.LEFT | Gravity.TOP;                smallWindowParams.width = FloatWindowSmallView.viewWidth;                smallWindowParams.height = FloatWindowSmallView.viewHeight;                smallWindowParams.x = screenWidth;                smallWindowParams.y = screenHeight / 2;            }            smallWindow.setParams(smallWindowParams);            windowManager.addView(smallWindow, smallWindowParams);        }    }    /**     * 将小悬浮窗从屏幕上移除。     *      * @param context     *            必须为应用程序的Context.     */    public static void removeSmallWindow(Context context) {        if (smallWindow != null) {            WindowManager windowManager = getWindowManager(context);            windowManager.removeView(smallWindow);            smallWindow = null;        }    }    /**     * 创建一个大悬浮窗。位置为屏幕正中间。     *      * @param context     *            必须为应用程序的Context.     */    public static void createBigWindow(Context context) {        WindowManager windowManager = getWindowManager(context);        int screenWidth = windowManager.getDefaultDisplay().getWidth();        int screenHeight = windowManager.getDefaultDisplay().getHeight();        if (bigWindow == null) {            bigWindow = new FloatWindowBigView(context);            if (bigWindowParams == null) {                bigWindowParams = new LayoutParams();                bigWindowParams.x = screenWidth / 2 - FloatWindowBigView.viewWidth / 2;                bigWindowParams.y = screenHeight / 2 - FloatWindowBigView.viewHeight / 2;                bigWindowParams.type = LayoutParams.TYPE_PHONE;                bigWindowParams.format = PixelFormat.RGBA_8888;                bigWindowParams.gravity = Gravity.LEFT | Gravity.TOP;                bigWindowParams.width = FloatWindowBigView.viewWidth;                bigWindowParams.height = FloatWindowBigView.viewHeight;            }            windowManager.addView(bigWindow, bigWindowParams);        }    }    /**     * 将大悬浮窗从屏幕上移除。     *      * @param context     *            必须为应用程序的Context.     */    public static void removeBigWindow(Context context) {        if (bigWindow != null) {            WindowManager windowManager = getWindowManager(context);            windowManager.removeView(bigWindow);            bigWindow = null;        }    }    /**     * 更新小悬浮窗的TextView上的数据,显示内存使用的百分比。     *      * @param context     *            可传入应用程序上下文。     */    public static void updateUsedPercent(Context context) {        if (smallWindow != null) {            TextView percentView = (TextView) smallWindow.findViewById(R.id.percent);            percentView.setText(getUsedPercentValue(context));        }    }    /**     * 是否有悬浮窗(包括小悬浮窗和大悬浮窗)显示在屏幕上。     *      * @return 有悬浮窗显示在桌面上返回true,没有的话返回false。     */    public static boolean isWindowShowing() {        return smallWindow != null || bigWindow != null;    }    /**     * 如果WindowManager还未创建,则创建一个新的WindowManager返回。否则返回当前已创建的WindowManager。     *      * @param context     *            必须为应用程序的Context.     * @return WindowManager的实例,用于控制在屏幕上添加或移除悬浮窗。     */    private static WindowManager getWindowManager(Context context) {        if (mWindowManager == null) {            mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);        }        return mWindowManager;    }    /**     * 如果ActivityManager还未创建,则创建一个新的ActivityManager返回。否则返回当前已创建的ActivityManager。     *      * @param context     *            可传入应用程序上下文。     * @return ActivityManager的实例,用于获取手机可用内存。     */    private static ActivityManager getActivityManager(Context context) {        if (mActivityManager == null) {            mActivityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        }        return mActivityManager;    }    /**     * 计算已使用内存的百分比,并返回。     *      * @param context     *            可传入应用程序上下文。     * @return 已使用内存的百分比,以字符串形式返回。     */    public static String getUsedPercentValue(Context context) {        String dir = "/proc/meminfo";        try {            FileReader fr = new FileReader(dir);            BufferedReader br = new BufferedReader(fr, 2048);            String memoryLine = br.readLine();            String subMemoryLine = memoryLine.substring(memoryLine.indexOf("MemTotal:"));            br.close();            long totalMemorySize = Integer.parseInt(subMemoryLine.replaceAll("\\D+", ""));            long availableSize = getAvailableMemory(context) / 1024;            int percent = (int) ((totalMemorySize - availableSize) / (float) totalMemorySize * 100);            return percent + "%";        } catch (IOException e) {            e.printStackTrace();        }        return "悬浮窗";    }    /**     * 获取当前可用内存,返回数据以字节为单位。     *      * @param context     *            可传入应用程序上下文。     * @return 当前可用内存。     */    private static long getAvailableMemory(Context context) {        ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();        getActivityManager(context).getMemoryInfo(mi);        return mi.availMem;    }}

4、浮窗控件
(1)

import android.content.Context;import android.view.LayoutInflater;import android.view.MotionEvent;import android.view.View;import android.view.WindowManager;import android.widget.LinearLayout;import android.widget.TextView;import java.lang.reflect.Field;public class FloatWindowSmallView extends LinearLayout {    /**     * 记录小悬浮窗的宽度     */    public static int viewWidth;    /**     * 记录小悬浮窗的高度     */    public static int viewHeight;    /**     * 记录系统状态栏的高度     */     private static int statusBarHeight;    /**     * 用于更新小悬浮窗的位置     */    private WindowManager windowManager;    /**     * 小悬浮窗的参数     */    private WindowManager.LayoutParams mParams;    /**     * 记录当前手指位置在屏幕上的横坐标值     */    private float xInScreen;    /**     * 记录当前手指位置在屏幕上的纵坐标值     */    private float yInScreen;    /**     * 记录手指按下时在屏幕上的横坐标的值     */    private float xDownInScreen;    /**     * 记录手指按下时在屏幕上的纵坐标的值     */    private float yDownInScreen;    /**     * 记录手指按下时在小悬浮窗的View上的横坐标的值     */    private float xInView;    /**     * 记录手指按下时在小悬浮窗的View上的纵坐标的值     */    private float yInView;    public FloatWindowSmallView(Context context) {        super(context);        windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);        LayoutInflater.from(context).inflate(R.layout.float_window_small, this);        View view = findViewById(R.id.small_window_layout);        viewWidth = view.getLayoutParams().width;        viewHeight = view.getLayoutParams().height;        TextView percentView = (TextView) findViewById(R.id.percent);        percentView.setText(MyWindowManager.getUsedPercentValue(context));    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {        case MotionEvent.ACTION_DOWN:            // 手指按下时记录必要数据,纵坐标的值都需要减去状态栏高度            xInView = event.getX();            yInView = event.getY();            xDownInScreen = event.getRawX();            yDownInScreen = event.getRawY() - getStatusBarHeight();            xInScreen = event.getRawX();            yInScreen = event.getRawY() - getStatusBarHeight();            break;        case MotionEvent.ACTION_MOVE:            xInScreen = event.getRawX();            yInScreen = event.getRawY() - getStatusBarHeight();            // 手指移动的时候更新小悬浮窗的位置            updateViewPosition();            break;        case MotionEvent.ACTION_UP:            // 如果手指离开屏幕时,xDownInScreen和xInScreen相等,且yDownInScreen和yInScreen相等,则视为触发了单击事件。            if (xDownInScreen == xInScreen && yDownInScreen == yInScreen) {                openBigWindow();            }            break;        default:            break;        }        return true;    }    /**     * 将小悬浮窗的参数传入,用于更新小悬浮窗的位置。     *      * @param params     *            小悬浮窗的参数     */    public void setParams(WindowManager.LayoutParams params) {        mParams = params;    }    /**     * 更新小悬浮窗在屏幕中的位置。     */    private void updateViewPosition() {        mParams.x = (int) (xInScreen - xInView);        mParams.y = (int) (yInScreen - yInView);        windowManager.updateViewLayout(this, mParams);    }    /**     * 打开大悬浮窗,同时关闭小悬浮窗。     */    private void openBigWindow() {        MyWindowManager.createBigWindow(getContext());        MyWindowManager.removeSmallWindow(getContext());    }    /**     * 用于获取状态栏的高度。     *      * @return 返回状态栏高度的像素值。     */    private int getStatusBarHeight() {        if (statusBarHeight == 0) {            try {                Class<?> c = Class.forName("com.android.internal.R$dimen");                Object o = c.newInstance();                Field field = c.getField("status_bar_height");                int x = (Integer) field.get(o);                statusBarHeight = getResources().getDimensionPixelSize(x);            } catch (Exception e) {                e.printStackTrace();            }        }        return statusBarHeight;    }    }    ===============XML=======    <?xml version="1.0" encoding="UTF-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/small_window_layout"    android:layout_width="60dip"    android:layout_height="25dip"    android:background="@drawable/bg_small"    >    <TextView         android:id="@+id/percent"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:gravity="center"        android:textColor="#ffffff"        /></LinearLayout>

(2)

import android.content.Context;import android.content.Intent;import android.view.LayoutInflater;import android.view.View;import android.widget.Button;import android.widget.LinearLayout;public class FloatWindowBigView extends LinearLayout {    /**     * 记录大悬浮窗的宽度     */    public static int viewWidth;    /**     * 记录大悬浮窗的高度     */    public static int viewHeight;    public FloatWindowBigView(final Context context) {        super(context);        LayoutInflater.from(context).inflate(R.layout.float_window_big, this);        View view = findViewById(R.id.big_window_layout);        viewWidth = view.getLayoutParams().width;        viewHeight = view.getLayoutParams().height;        Button close = (Button) findViewById(R.id.close);        Button back = (Button) findViewById(R.id.back);        close.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 点击关闭悬浮窗的时候,移除所有悬浮窗,并停止Service                MyWindowManager.removeBigWindow(context);                MyWindowManager.removeSmallWindow(context);                Intent intent = new Intent(getContext(), FloatWindowService.class);                context.stopService(intent);            }        });        back.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // 点击返回的时候,移除大悬浮窗,创建小悬浮窗                MyWindowManager.removeBigWindow(context);                MyWindowManager.createSmallWindow(context);            }        });    }}=======================XML================================<?xml version="1.0" encoding="UTF-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/big_window_layout"    android:layout_width="200dip"    android:layout_height="100dip"    android:background="@drawable/bg_big"    android:orientation="vertical"    >    <Button         android:id="@+id/close"        android:layout_width="100dip"        android:layout_height="40dip"        android:layout_gravity="center_horizontal"        android:layout_marginTop="12dip"        android:text="关闭悬浮窗"        />    <Button         android:id="@+id/back"        android:layout_width="100dip"        android:layout_height="40dip"        android:layout_gravity="center_horizontal"        android:text="返回"        /></LinearLayout>

5、权限

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