android popupwindow位置

因为要做recyclerview点击弹窗问题，感觉popupwindow能够比较好的处理焦点和位置问题，来看看位置的处理

activity

package com.fanyafeng.orlitedemo.activity;

import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.PopupWindow;

import com.fanyafeng.orlitedemo.BaseActivity;
import com.fanyafeng.orlitedemo.R;
import com.fanyafeng.orlitedemo.util.MyUtils;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class PopupWindowActivity extends BaseActivity {
private Button btn_bottom_pop;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_popup_window);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
initView();
initData();
}

private void initView() {
btn_bottom_pop = (Button) findViewById(R.id.btn_bottom_pop);
}

private void initData() {

}

private void downShowPopupWindow(View view) {
PopupWindow popupWindow;
View popView = getLayoutInflater().inflate(R.layout.layout_popwindow_recyclerview, null);
popupWindow = new PopupWindow(popView, ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
popupWindow.setTouchable(true);
popupWindow.setOutsideTouchable(true);
popupWindow.setBackgroundDrawable(new BitmapDrawable(getResources(), (Bitmap) null));
popupWindow.showAsDropDown(view);
}

private void bottomShowPopupWindow(View view) {
PopupWindow popupWindow;
View popView = getLayoutInflater().inflate(R.layout.layout_popwindow_recyclerview, null);
popupWindow = new PopupWindow(popView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
popupWindow.setTouchable(true);
popupWindow.setOutsideTouchable(true);
popupWindow.setBackgroundDrawable(new BitmapDrawable(getResources(), (Bitmap) null));
float popupWindowWidth = MyUtils.dip2px(this, 96);
Log.d("TAG", "pop的宽度:" + popupWindowWidth);
int offsetX = MyUtils.getScreenWidth(this) / 2;
int[] location = new int[2];
btn_bottom_pop.getLocationInWindow(location);
int popX = location[0];
int popY = location[1];

//相对位置,子点击的控件和margin开始定为原点(0,0)
popupWindow.showAsDropDown(view, offsetX - (int) popupWindowWidth / 2,
MyUtils.getScreenHeight(this) - MyUtils.getNavigationBarHeight(this) - (int) MyUtils.dip2px(this, 80) - popY);
}

private void bottomCenterShowPopupWindow(View view) {
PopupWindow popupWindow;
View popView = getLayoutInflater().inflate(R.layout.layout_popwindow_recyclerview, null);
popupWindow = new PopupWindow(popView, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, true);
popupWindow.setTouchable(true);
popupWindow.setOutsideTouchable(true);
popupWindow.setBackgroundDrawable(new BitmapDrawable(getResources(), (Bitmap) null));
popupWindow.showAtLocation(view, Gravity.CENTER, 0, MyUtils.getScreenHeight(this) - MyUtils.getNavigationBarHeight(this));
}

@Override
public void onClick(View v) {
super.onClick(v);
switch (v.getId()) {
case R.id.btn_down_pop:
downShowPopupWindow(v);
break;
case R.id.btn_bottom_pop:
bottomShowPopupWindow(v);
break;
case R.id.btn_bottom_center_pop:
bottomCenterShowPopupWindow(v);
break;
}
}

}

再来看用到的工具类myutils

package com.fanyafeng.orlitedemo.util;

import android.app.Activity;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.graphics.Rect;
import android.os.Build;
import android.util.DisplayMetrics;
import android.view.ViewConfiguration;
import android.view.Window;
import android.view.WindowManager;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MyUtils {
private static String channel = null;

public static String getChannel(Context context) {
if (channel == null) {
ApplicationInfo ai = null;
channel = "shape_maintext_box";
try {
ai = context.getPackageManager().getApplicationInfo(context.getPackageName(), PackageManager.GET_META_DATA);

if (ai != null) {
channel = String.valueOf(ai.metaData.get("UMENG_CHANNEL"));
}
} catch (Exception e) {
e.printStackTrace();
}
}
return channel;
}

public static int getStatusBarHeight(Context context) {
try {
@SuppressWarnings("rawtypes")
Class clazz = Class.forName("com.android.internal.R$dimen");
Object object = clazz.newInstance();
Field field = clazz.getField("status_bar_height");

int id = Integer.parseInt(field.get(object).toString());
return context.getResources().getDimensionPixelSize(id);
} catch (Exception e) {
e.printStackTrace();
}
return 0;
}

/**
* Get the screen height.
*
* @param context
* @return the screen height
*/
public static int getScreenHeight(Context context) {
if (context != null) {
DisplayMetrics displayMetrics = new DisplayMetrics();
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(displayMetrics);

return displayMetrics.heightPixels;
} else {
return 1920;
}
}

/**
* Get the screen width.
*
* @param context
* @return the screen width
*/
public static int getScreenWidth(Context context) {
if (context != null) {
DisplayMetrics displayMetrics = new DisplayMetrics();
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(displayMetrics);

return displayMetrics.widthPixels;
} else {
return 1080;
}
}

public static float getDensity(Context context) {
DisplayMetrics displayMetrics = new DisplayMetrics();
WindowManager windowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
windowManager.getDefaultDisplay().getMetrics(displayMetrics);
return displayMetrics.density;
}

public static String getMetaValue(Context context, String metaKey) {

if (context == null || metaKey == null) {
return null;
}

try {
ApplicationInfo aiApplicationInfo = context.getPackageManager().getApplicationInfo(
context.getPackageName(), PackageManager.GET_META_DATA);

if (null != aiApplicationInfo) {
if (null != aiApplicationInfo.metaData) {
return aiApplicationInfo.metaData.getString(metaKey);
}
}

} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return null;
}

/**
* 格式化日期
* yyyy-MM-dd 转为 yyyy年MM月dd日
*
* @param dateStr
* @return
*/
public static String formatSystemDateCN(String dateStr) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
try {
String standarTime;

Date date = simpleDateFormat.parse(dateStr);
simpleDateFormat = new SimpleDateFormat("yyyy年MM月dd日");
standarTime = simpleDateFormat.format(date);

return standarTime;
} catch (ParseException e) {
e.printStackTrace();
}
return dateStr;
}

public static float dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (float) (dipValue * scale + 0.5f);
}

public static float px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (float) (pxValue / scale + 0.5f);
}

/**
* 获取标题栏的高度
*
* @param activity
* @return
*/
public int getTitleHeight(Activity activity) {
Rect rect = new Rect();
Window window = activity.getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rect);
int statusBarHeight = rect.top;
int contentViewTop = window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
int titleBarHeight = contentViewTop - statusBarHeight;

return titleBarHeight;
}

/**
*
* 获取状态栏高度
*
* @param activity
* @return
*/
public int getStateHeight(Activity activity) {
Rect rect = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
return rect.top;
}

/**
* 获取屏幕宽高
*
* @param activity
* @return int[0] 宽，int[1]高
*/
public int[] getScreenWidthAndSizeInPx(Activity activity) {
DisplayMetrics displayMetrics = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int[] size = new int[2];
size[0] = displayMetrics.widthPixels;
size[1] = displayMetrics.heightPixels;
return size;
}

/**
* 获取虚拟按键栏高度
* @param context
* @return
*/
public static int getNavigationBarHeight(Context context) {
int result = 0;
if (hasNavBar(context)){
Resources res = context.getResources();
int resourceId = res.getIdentifier("navigation_bar_height", "dimen", "android");
if (resourceId > 0) {
result = res.getDimensionPixelSize(resourceId);
}
}
return result;
}

/**
* 检查是否存在虚拟按键栏
* @param context
* @return
*/
private static boolean hasNavBar(Context context) {
Resources res = context.getResources();
int resourceId = res.getIdentifier("config_showNavigationBar", "bool", "android");
if (resourceId != 0) {
boolean hasNav = res.getBoolean(resourceId);
// check override flag
String sNavBarOverride = getNavBarOverride();
if ("1".equals(sNavBarOverride)) {
hasNav = false;
} else if ("0".equals(sNavBarOverride)) {
hasNav = true;
}
return hasNav;
} else { // fallback
return !ViewConfiguration.get(context).hasPermanentMenuKey();
}
}

/**
* 判断虚拟按键栏是否重写
* @return
*/
private static String getNavBarOverride() {
String sNavBarOverride = null;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
try {
Class c = Class.forName("android.os.SystemProperties");
Method m = c.getDeclaredMethod("get", String.class);
m.setAccessible(true);
sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");
} catch (Throwable e) {
}
}
return sNavBarOverride;
}

}

基本主要的是位置的原点坐标，知道这个剩下的就好处理了