【android】悬浮球
2024-05-13 03:26:05
效果图
原理
获取windowManager 设定WindowManager.LayoutParams使窗口悬浮
主要涉及的值如下，其中
params.type = WindowManager.LayoutParams.TYPE_APPLICATION;设置悬浮窗在应用内，在弹出dialog会悬浮在dialog下方，如果将这个值设置为TYPE_PHONE那么会悬浮在屏幕最上方，回到桌面后，如果应用没有退出悬浮球还是会出现在桌面上，所以如果要开发桌面悬浮球可以这样设置。
WindowManager.LayoutParams params;params = new WindowManager.LayoutParams();params.type = WindowManager.LayoutParams.TYPE_APPLICATION;params.format = PixelFormat.TRANSLUCENT;params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;params.gravity = Gravity.LEFT | Gravity.TOP;params.width = viewWidth;params.height = viewHeight;params.x = 0;params.y = screenHeight / 3;windowManager.addView(*****,params);代码
import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Build;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.Display;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.LinearLayout;import java.lang.reflect.Field;
import java.lang.reflect.Method;/*** Created by fanweichao on 2016/9/6.*/
public class FloatView extends LinearLayout {private Context mContext;private WindowManager windowManager;private View floatView;public int viewWidth;public int viewHeight;private WindowManager.LayoutParams params;private float xInScreen;private float yInScreen;private float xInView;private float yInView;private int screenWidth;private int screenHeight;private static int historyX = 0;private static int historyY = 0;private static float historyAlpha = 1;
// private static int historyVisible = VISIBLE;private static String histotyOritation;private Runnable mHideHalfCallback;/*** 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;/*** 状态栏的高度*/private int statusBarHeight;private OnFloatViewClickListener onFloatViewClickListener;public FloatView(Context context) {this(context,null);}public FloatView(Context context, AttributeSet attrs) {super(context, attrs);mContext = context;init();}private void init() {viewWidth = Utils.dip2px(mContext,50);viewHeight = Utils.dip2px(mContext,50);windowManager = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);screenWidth = windowManager.getDefaultDisplay().getWidth();screenHeight = windowManager.getDefaultDisplay().getHeight();floatView = View.inflate(mContext,R.layout.******,this);params = new WindowManager.LayoutParams();params.type = WindowManager.LayoutParams.TYPE_APPLICATION;params.format = PixelFormat.TRANSLUCENT;params.flags = WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE|WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;params.gravity = Gravity.LEFT | Gravity.TOP;params.width = viewWidth;params.height = viewHeight;setViewAlpha(historyAlpha);if (historyX == 0 && historyY == 0){params.x = 0;params.y = screenHeight / 3;}else {if (historyX >screenWidth-viewWidth/2 || historyY >screenHeight -viewHeight/2){params.x = 0;params.y = screenHeight / 3;historyX = params.x;historyY = params.y;}else {params.x = historyX;params.y = historyY;}}windowManager.addView(this,params);
// setVisibility(historyVisible);}@Overridepublic boolean onTouchEvent(MotionEvent event) {
// screenWidth = windowManager.getDefaultDisplay().getWidth();
// screenHeight = windowManager.getDefaultDisplay().getHeight();switch (event.getAction()){case MotionEvent.ACTION_DOWN:setViewAlpha(1);removeCallbacks(mHideHalfCallback);xInScreen = event.getRawX();yInScreen = event.getRawY() - getStatusBarHeight();xDownInScreen = event.getRawX();yDownInScreen = event.getRawY() - getStatusBarHeight();xInView = event.getX();yInView = event.getY();break;case MotionEvent.ACTION_MOVE:xInScreen = event.getRawX();yInScreen = event.getRawY() - getStatusBarHeight();updateViewPosition();break;case MotionEvent.ACTION_UP://计算位置并靠边if (Math.abs(xDownInScreen-xInScreen)<20 && Math.abs(yDownInScreen-yInScreen)<20){//单击事件if (null != onFloatViewClickListener){onFloatViewClickListener.onFloatViewClick();}}stepAside();break;}return true;}private void stepAside() {int inWitchSide = 0;float viewCenterX = params.x + viewWidth/2;float viewCenterY = params.y + viewHeight/2;
// screenWidth = windowManager.getDefaultDisplay().getWidth();
// screenHeight = windowManager.getDefaultDisplay().getHeight();float dxLeft = viewCenterX;float dyUp = viewCenterY;float dxRight = screenWidth - dxLeft;float dyDown = screenHeight -dyUp;float result = getMin(dxLeft,dyUp,dxRight,dyDown);if (result == dxLeft){params.x = 0;inWitchSide = 0;}else if (result == dxRight){params.x = screenWidth-viewWidth;inWitchSide = 1;}else if (result == dyUp){params.y = 0;inWitchSide = 2;}else{params.y = screenHeight-viewHeight-getStatusBarHeight();inWitchSide = 3;}windowManager.updateViewLayout(this, params);historyX = params.x;historyY = params.y;hideHalf(inWitchSide);}private void hideHalf(final int inWitchSide) {mHideHalfCallback = new HideHalfCallback(inWitchSide);postDelayed(mHideHalfCallback,1000);}private void updateViewPosition() {params.x = (int) (xInScreen - xInView);params.y = (int) (yInScreen - yInView);if (params.x <0){params.x = 0;}if (params.y < 0){params.y = 0;}if ((params.x + viewWidth) > screenWidth){params.x = screenWidth -viewWidth;}if (params.y + viewHeight > screenHeight -getStatusBarHeight()){params.y = screenHeight - getStatusBarHeight() -viewHeight;}windowManager.updateViewLayout(this, params);historyX = params.x;historyY = params.y;}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;}private float getMin(float dxLeft, float dyUp, float dxRight, float dyDown){float a = Math.min(dxLeft,dyUp);float b = Math.min(dxRight,dyDown);float c = Math.min(a,b);return c;}public int getBottomStatusHeight(Context context){int totalHeight = getDpi(context);int contentHeight = getScreenHeight(context);return totalHeight - contentHeight;}//获取屏幕原始尺寸高度，包括虚拟功能键高度public int getDpi(Context context){int dpi = 0;WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);Display display = windowManager.getDefaultDisplay();DisplayMetrics displayMetrics = new DisplayMetrics();@SuppressWarnings("rawtypes")Class c;try {c = Class.forName("android.view.Display");@SuppressWarnings("unchecked")Method method = c.getMethod("getRealMetrics",DisplayMetrics.class);method.invoke(display, displayMetrics);dpi=displayMetrics.heightPixels;}catch(Exception e){e.printStackTrace();}return dpi;}public int getScreenHeight(Context context){WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);DisplayMetrics outMetrics = new DisplayMetrics();wm.getDefaultDisplay().getMetrics(outMetrics);return outMetrics.heightPixels;}public int getScreenWidth(Context context){WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);DisplayMetrics outMetrics = new DisplayMetrics();wm.getDefaultDisplay().getMetrics(outMetrics);return outMetrics.widthPixels;}public void showView(){windowManager.addView(this,params);}public void setOnFloatViewClickListener(OnFloatViewClickListener onFloatViewClickListener) {this.onFloatViewClickListener = onFloatViewClickListener;}public interface OnFloatViewClickListener{void onFloatViewClick();}public void removeView(){try {windowManager.removeView(this);}catch (Exception e){}removeCallbacks(mHideHalfCallback);mHideHalfCallback = null;windowManager = null;params = null;}public void setViewAlpha(float f){if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {setAlpha(f);historyAlpha = f;}}private class HideHalfCallback implements Runnable{int inWitchSide;public HideHalfCallback(int inWitchSide){this.inWitchSide = inWitchSide;}@Overridepublic void run() {if (null != params && null != windowManager){if (inWitchSide == 0){params.x = -viewWidth/2;}else if (inWitchSide == 1){params.x = screenWidth-viewWidth/2;}else if (inWitchSide == 2){params.y = -viewHeight/2;}else if (inWitchSide == 3){params.y = screenHeight - viewHeight/2 - getStatusBarHeight();}windowManager.updateViewLayout(FloatView.this, params);setViewAlpha(0.5f);historyX = params.x;historyY = params.y;}}}@Overridepublic void setVisibility(int visibility) {super.setVisibility(visibility);
// historyVisible = visibility;}
}
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