本文实例为大家分享了Android系统级悬浮按钮的具体代码,供大家参考,具体内容如下
具体的需求
1、就是做一个系统级的悬浮按钮,就像iPhone 桌面的那个悬浮按钮效果一样,能随意拖动,并且手一放开,悬浮按钮就自动靠边。
2、可以点击并且可以随意拖动。
3、悬浮按钮自动靠边的时候,或者移动到边上的时候,自动隐藏半边。
4、横竖屏切换都兼容
1、就在WindowManager 里面添加View,这个View通过自定义控件来实现。
2、在onTouch里的MotionEvent.ACTION_MOVE事件里头,通过控制悬浮按钮的具体坐标来实现随意移动。
3、在onTouch里的MotionEvent.ACTION_UP事件里头,来控制悬浮按钮自动靠边,并且自动隐藏半边,不过在这里onTouch和onClick这两个事件是一起触发的,不过这也有解决办法,你可以在手放开的瞬间,通过移动的距离,来决定是否触发点击事件,,如果返回false,就会触发点击事件,如果返回true就会触发点击事件
4、通过自定义控件onLayout方法,来捕获横竖屏切换事件,
5、还有一个靠哪边停靠的问题,通过坐标来判读更靠近哪一边。就靠哪边停靠。
![以中间这个中心点为准,以更短的X轴画一个正方形]
下面是具体实现代码:
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import com.iapppay.openid.channel.LoginResultCallback;
import com.iapppay.openid.channel.OpenIDApplication;
import com.iapppay.openid.channel.util.DisplayUtil;
import com.iapppay.openid.channel.util.LogUtil;
import com.iapppay.openid.channel.util.Res;
/**
* Created by HuangTiebing 2017/2/14.
*/
public class DragFloatActionButton extends ImageView implements View.OnTouchListener, View.OnClickListener {
public static String TAG = "DragFloatActionButton";
private Context context;
float lastX, lastY;
float originX, originY;
int screenWidth;
int screenHeight;
private int originWidth;
private WindowManager windowManager;
// // 此windowManagerParams变量为获取的全局变量,用以保存悬浮窗口的属性
private WindowManager.LayoutParams windowManagerParams;
private LoginResultCallback resultCallback; //悬浮按钮点击回调
public DragFloatActionButton(Context context, boolean isForceLogin, LoginResultCallback resultCallback) {
this(context, null);
OpenIDApplication.getInstance().setForceLogin(isForceLogin);
this.resultCallback = resultCallback;
}
public DragFloatActionButton(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DragFloatActionButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
Point screenSize = DisplayUtil.getScreenSize(context);
screenWidth = screenSize.x;
screenHeight = screenSize.y;
setImageResource(Res.drawable(context, "ipay_float_btn_bg"));
setOnTouchListener(this);
setOnClickListener(this);
windowManager = (WindowManager) getContext().getApplicationContext().getSystemService(Context.WINDOW_SERVICE);
}
public int getOriginWidth() {
return originWidth;
}
public void setOriginWidth(int originWidth) {
this.originWidth = originWidth;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
windowManagerParams = (WindowManager.LayoutParams) this.getLayoutParams();
//获取到状态栏的高度
Rect frame = new Rect();
getWindowVisibleDisplayFrame(frame);
int ea = event.getAction();
switch (ea) {
case MotionEvent.ACTION_DOWN:
lastX = event.getRawX();// 获取触摸事件触摸位置的原始X坐标
lastY = event.getRawY();
originX = lastX;
originY = lastY;
break;
case MotionEvent.ACTION_MOVE:
float dx = event.getRawX() - lastX;
float dy = event.getRawY() - lastY;
windowManagerParams.x += dx;
windowManagerParams.y += dy;
LogUtil.d(TAG, "移动距离:dx=" + dx + ",dy=" + dy);
showAllBtn();
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
break;
case MotionEvent.ACTION_UP:
float lastMoveDx = Math.abs(event.getRawX() - originX);
float lastMoveDy = Math.abs(event.getRawY() - originY);
LogUtil.d(TAG, "松开时,移动距离:lastMoveDx=" + lastMoveDx + ", lastMoveDy=" + lastMoveDy);
if (lastMoveDx < 10 && lastMoveDy < 10) { //移动距离太小,视为点击,
return false;
} else {
updateViewLayout(event);
isFirstClick = true;
return true;
}
}
return false;
}
/**
* 显示整个图标
*/
public void showAllBtn() {
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth;
setImageResource(Res.drawable(context, "ipay_float_btn_bg"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新显示
}
/**
* 悬浮按钮显示在左边
*/
private void showInLeft() {
windowManagerParams.x = 0;
windowManagerParams.width = originWidth / 2;
windowManagerParams.height = originWidth;
setImageResource(Res.drawable(context, "ipay_float_btn_left_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新显示
}
/**
* 悬浮按钮显示在右边
*/
private void showInRight() {
windowManagerParams.width = originWidth / 2;
windowManagerParams.height = originWidth;
windowManagerParams.x = screenWidth - windowManagerParams.width;
setImageResource(Res.drawable(context, "ipay_float_btn_right_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新显示
}
/**
* 悬浮按钮显示在上面
*/
private void showInTop() {
windowManagerParams.y = 0;
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth / 2;
setImageResource(Res.drawable(context, "ipay_float_btn_top_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新显示
}
/**
* 悬浮按钮显示在下面
*/
private void showInBottom() {
windowManagerParams.width = originWidth;
windowManagerParams.height = originWidth / 2;
windowManagerParams.y = screenHeight - windowManagerParams.width;
setImageResource(Res.drawable(context, "ipay_float_btn_bottom_hidden"));
windowManager.updateViewLayout(this, windowManagerParams); // 刷新显示
}
/**
* 更新悬浮图标
*
* @param event 手动移动事件
*/
public void updateViewLayout(MotionEvent event) {
Point center = new Point(screenWidth / 2, screenHeight / 2); //屏幕中心点
float xOffset, yOffset;//以屏幕中心点为原点,X轴和Y轴上的偏移量
if (event != null) {//手动移动的
xOffset = event.getRawX() - center.x;
yOffset = event.getRawY() - center.y;
} else {//自动隐藏
xOffset = lastX - center.x;
yOffset = lastY - center.y;
}
if (Math.abs(xOffset) >= Math.abs(yOffset)) {//向左或向右缩进隐藏
if (xOffset <= 0) { //向左缩进
showInLeft();
} else {
showInRight();
}
} else {//向上或向下缩进隐藏
if (yOffset <= 0) {//向上缩进
showInTop();
} else {
showInBottom();
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
Point screenSize = DisplayUtil.getScreenSize(context);
if (screenWidth != screenSize.x) {//屏幕旋转切换
screenWidth = screenSize.x;
screenHeight = screenSize.y;
lastY = windowManagerParams.x;
lastX = windowManagerParams.y;
windowManagerParams.x = (int) lastX;
windowManagerParams.y = (int) lastY;
updateViewLayout(null);
}
}
private boolean isFirstClick = true;
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
}
@Override
public void onClick(View v) {
LogUtil.d(TAG, "执行点击事件");
if (!isFirstClick) {
OpenIDApplication.getInstance().floatBtnClick(context, OpenIDApplication.getInstance().isForceLogin(), resultCallback);
} else {//半隐藏状态,点击显示全部
isFirstClick = false;
showAllBtn();
}
}
}
调用实现代码,这里注意有个问题,弹出系统级的悬浮窗,需要配置权限:
并且Android 6.0以上的手机,还要弹出对话框问用户是否运行,如果这个用户拒绝了,就不能弹出系统级的悬浮窗了,还有个别手机厂商修改了android源码,还需要进系统设置里去允许这个应用弹出悬浮窗。这样的话就体验感非常不好,不过这里有个小技巧,按下面方式设置为toast类型就完全解决,既不用配置权限,也不弹出窗来向用户获取权限,完全解决问题。
WindowManager.LayoutParams windowManagerParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.TYPE_TOAST,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
具体实现代码如下:
DragFloatActionButton floatBtn = new DragFloatActionButton(context, isForceLogin, mResultCallback);
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
// 设置LayoutParams(全局变量)相关参数
WindowManager.LayoutParams windowManagerParams = new WindowManager.LayoutParams(WindowManager.LayoutParams.TYPE_TOAST,
WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
/**
* 注意,flag的值可以为:
* 下面的flags属性的效果形同“锁定”。
* 悬浮窗不可触摸,不接受任何事件,同时不影响后面的事件响应。
* LayoutParams.FLAG_NOT_TOUCH_MODAL 不影响后面的事件
* LayoutParams.FLAG_NOT_FOCUSABLE 不可聚焦
* LayoutParams.FLAG_NOT_TOUCHABLE 不可触摸
*/
// 调整悬浮窗口至左上角,便于调整坐标
windowManagerParams.gravity = Gravity.LEFT | Gravity.TOP;
// 以屏幕左上角为原点,设置x、y初始值
windowManagerParams.x = 0;
windowManagerParams.y = 0;
// 设置悬浮窗口长宽数据
floatBtn.measure(0, 0);
floatBtn.setOriginWidth(floatBtn.getMeasuredWidth() - 50);
windowManagerParams.width = floatBtn.getOriginWidth();
windowManagerParams.height = windowManagerParams.width;
// 显示myFloatView图像
windowManager.addView(floatBtn, windowManagerParams);
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脚本之家。