Android仿IOS系统悬浮窗效果-编程学习网

在一些场合里，我们使用悬浮窗会有很大的便利，比如IOS系统的悬浮窗，360或者其他手机卫士的悬浮窗等等。

本篇博客，我们创造出两个悬浮窗，通过点击小悬浮窗打开或者关闭大悬浮窗（一个播放控制器）。

代码如下：

在这之前，我们需要在manifest中申请权限：


<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

并且，悬浮窗这个权限我们需要手动在手机找到应用权限管理，允许这个权限才行

小悬浮窗的界面代码float_normal_view.xml：


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="65dp"
    android:layout_height="65dp"
    android:id="@+id/ll_float_normal"
    android:background="@drawable/float_bg"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/iv_show_control_view"
        android:layout_gravity="center"
        android:background="@drawable/white_ring"
        android:layout_width="35dp"
        android:orientation="vertical"
        android:layout_height="35dp" >

    </ImageView>

</LinearLayout>

大悬浮窗的界面代码float_control_view：


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/ll_float_control"
    android:layout_width="300dp"
    android:layout_height="100dp"
    android:background="@drawable/float_bg"
    android:gravity="center_horizontal|bottom"
    android:orientation="vertical">

    <SeekBar
        android:id="@+id/timeline"
        android:paddingTop="3dp"
        android:paddingBottom="3dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:focusable="true"
        android:maxHeight="5.0dip"
        android:minHeight="5.0dip"
        android:paddingLeft="16.0dip"
        android:paddingRight="16.0dip"
        android:progressDrawable="@drawable/po_seekbar"
        android:thumb="@drawable/seekbar_thumb" />

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:paddingBottom="10dp"
        android:paddingEnd="20dp"
        android:paddingStart="20dp"
        android:paddingTop="10dp">

        <ImageButton
            android:id="@+id/ibt_rewind"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_centerVertical="true"
            android:layout_marginEnd="20dp"
            android:layout_marginRight="20dp"
            android:layout_toLeftOf="@+id/ibt_play"
            android:layout_toStartOf="@+id/ibt_play"
            android:background="@drawable/rewind" />

        <ImageButton
            android:id="@+id/ibt_play"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:layout_centerHorizontal="true"
            android:background="@drawable/pause" />

        <ImageButton
            android:id="@+id/ibt_forward"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:layout_centerVertical="true"
            android:layout_marginLeft="20dp"
            android:layout_marginStart="20dp"
            android:layout_toEndOf="@+id/ibt_play"
            android:layout_toRightOf="@+id/ibt_play"
            android:background="@drawable/forward" />

    </RelativeLayout>


</LinearLayout>

入口activity（FloatActivity ）：


public class FloatActivity extends Activity {

    MyWindowManager myWindowManager;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myWindowManager = MyWindowManager.getInstance();
        myWindowManager.createNormalView(this.getApplicationContext());
    }
}

悬浮窗管理器MyWindowManager：



public class MyWindowManager {

    private FloatNormalView normalView;
    private FloatControlView controlView;

    private static MyWindowManager instance;
    private WindowManager windowManager;

    private MyWindowManager() {
    }

    public static MyWindowManager getInstance() {
        if (instance == null)
            instance = new MyWindowManager();
        return instance;
    }

    private WindowManager getWindowManager(Context context) {
        if (windowManager == null)
            windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        return windowManager;
    }

    
    public boolean isNormalViewExists() {
        return normalView != null;
    }

    
    public boolean isControlViewExists() {
        return controlView != null;
    }

    
    public void createNormalView(Context context) {
        if (normalView == null) {
            normalView = new FloatNormalView(context);
        }
    }


    
    public void removeNormalView(Context context) {
        if (normalView != null) {
            windowManager.removeView(normalView);
            normalView = null;
        }
    }

    
    public void createControlView(Context context) {
        if (controlView == null)
            controlView = new FloatControlView(context);
    }

    
    public void removeControlView(Context context) {
        if (controlView != null) {
            WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
            windowManager.removeView(controlView);
            controlView = null;
        }
    }
}

小悬浮窗FloatNormalView：



public class FloatNormalView extends LinearLayout {

    
    public static int viewWidth;

    
    public static int viewHeight;

    
    private static int statusBarHeight;

    
    private WindowManager windowManager;

    
    private WindowManager.LayoutParams mParams;

    
    private float xInScreen;

    
    private float yInScreen;

    
    private float xDownInScreen;

    
    private float yDownInScreen;

    
    private float xInView;

    
    private float yInView;

    public FloatNormalView(Context context) {
        super(context);
        windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        LayoutInflater.from(context).inflate(R.layout.float_normal_view, this);
        View view = findViewById(R.id.ll_float_normal);
        viewWidth = view.getLayoutParams().width;
        viewHeight = view.getLayoutParams().height;
        initLayoutParams();
    }

    
    private void initLayoutParams() {
        //屏幕宽高
        int screenWidth = windowManager.getDefaultDisplay().getWidth();
        int screenHeight = windowManager.getDefaultDisplay().getHeight();

        mParams = new WindowManager.LayoutParams();
        //总是出现在应用程序窗口之上。
        mParams.type = WindowManager.LayoutParams.TYPE_PHONE;

        // FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口
        // 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
        mParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;

        //悬浮窗默认显示的位置
        mParams.gravity = Gravity.START | Gravity.TOP;
        //指定位置
        mParams.x = screenWidth - viewWidth * 2;
        mParams.y = screenHeight / 2 + viewHeight * 2;
        //悬浮窗的宽高
        mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
        mParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
        mParams.format = PixelFormat.TRANSPARENT;
        windowManager.addView(this, mParams);
    }

    @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) {
                    openOrCloseControlView();
                }
                break;
            default:
                break;
        }
        return true;
    }

    
    public void setParams(WindowManager.LayoutParams params) {
        mParams = params;
    }

    
    private void updateViewPosition() {
        mParams.x = (int) (xInScreen - xInView);
        mParams.y = (int) (yInScreen - yInView);
        windowManager.updateViewLayout(this, mParams);
    }

    
    private void openOrCloseControlView() {
        MyWindowManager manager = MyWindowManager.getInstance();
        if (!manager.isControlViewExists())
            manager.createControlView(getContext());
        else
            manager.removeControlView(getContext());
    }

    
    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;
    }
}

大悬浮窗FloatControlView：



public class FloatNormalView extends LinearLayout {

    
    public static int viewWidth;

    
    public static int viewHeight;

    
    private static int statusBarHeight;

    
    private WindowManager windowManager;

    
    private WindowManager.LayoutParams mParams;

    
    private float xInScreen;

    
    private float yInScreen;

    
    private float xDownInScreen;

    
    private float yDownInScreen;

    
    private float xInView;

    
    private float yInView;

    public FloatNormalView(Context context) {
        super(context);
        windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        LayoutInflater.from(context).inflate(R.layout.float_normal_view, this);
        View view = findViewById(R.id.ll_float_normal);
        viewWidth = view.getLayoutParams().width;
        viewHeight = view.getLayoutParams().height;
        initLayoutParams();
    }

    
    private void initLayoutParams() {
        //屏幕宽高
        int screenWidth = windowManager.getDefaultDisplay().getWidth();
        int screenHeight = windowManager.getDefaultDisplay().getHeight();

        mParams = new WindowManager.LayoutParams();
        //总是出现在应用程序窗口之上。
        mParams.type = WindowManager.LayoutParams.TYPE_PHONE;

        // FLAG_NOT_TOUCH_MODAL不阻塞事件传递到后面的窗口
        // 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
        mParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
                | WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL;

        //悬浮窗默认显示的位置
        mParams.gravity = Gravity.START | Gravity.TOP;
        //指定位置
        mParams.x = screenWidth - viewWidth * 2;
        mParams.y = screenHeight / 2 + viewHeight * 2;
        //悬浮窗的宽高
        mParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
        mParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
        mParams.format = PixelFormat.TRANSPARENT;
        windowManager.addView(this, mParams);
    }

    @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) {
                    openOrCloseControlView();
                }
                break;
            default:
                break;
        }
        return true;
    }

    
    public void setParams(WindowManager.LayoutParams params) {
        mParams = params;
    }

    
    private void updateViewPosition() {
        mParams.x = (int) (xInScreen - xInView);
        mParams.y = (int) (yInScreen - yInView);
        windowManager.updateViewLayout(this, mParams);
    }

    
    private void openOrCloseControlView() {
        MyWindowManager manager = MyWindowManager.getInstance();
        if (!manager.isControlViewExists())
            manager.createControlView(getContext());
        else
            manager.removeControlView(getContext());
    }

    
    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;
    }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。

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