Android仿IOS系统悬浮窗效果
短信预约 -IT技能 免费直播动态提醒
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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