import android.app.Activity;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.widget.PopupWindow;
import com.msyc.onion.R;
import java.lang.ref.WeakReference;
/**
* 简易封装的PopupWindow
*/
public class CustomPopupWindow implements PopupWindow.OnDismissListener {
private PopupWindow mPopupWindow;
private View contentView;
private static WeakReference<Activity> refActivity;
private Builder builder;
public CustomPopupWindow(Builder builder) {
this.builder = builder;
contentView = LayoutInflater.from(refActivity.get()).inflate(builder.contentViewId, null);
mPopupWindow = new PopupWindow(contentView, builder.width, builder.height);
if (builder.outsideTouchable) {
//设置点击外部可以取消，必须和下面这个方法配合才有效,(setOutsideTouchable设置生效的前提是setTouchable(true)和setFocusable(false),此处存疑)
mPopupWindow.setOutsideTouchable(true);
//设置一个空背景,设置了这个背景之后，设置点击外部取消才有效
mPopupWindow.setBackgroundDrawable(new ColorDrawable()); //如果不设置PopupWindow的背景，有些版本就会出现一个问题：无论是点击外部区域还是Back键都无法dismiss弹框
// mPopupWindow.setTouchable(true);
mPopupWindow.setFocusable(true); // false时PopupWindow不处理返回键（此处设置为true，则效果是正常的，和上方的说法存疑）
}
//Popupwindow可以点击,PopupWindow弹出后，所有的触屏和物理按键都有PopupWindows处理。
// 其他任何事件的响应都必须发生在PopupWindow消失之后， （home 等系统层面的事件除外）。
// 比如这样一个PopupWindow出现的时候，按back键首先是让PopupWindow消失，
// 第二次按才是退出activity，
//解决Pop遮挡住虚拟键盘的问题
mPopupWindow.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED);
//让pop自适应输入状态
mPopupWindow.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
if (builder.animStyle != 0) {
mPopupWindow.setAnimationStyle(builder.animStyle); //设置pop显示的动画效果
}
mPopupWindow.setOnDismissListener(this); //设置pop关闭的监听事件
// 原生的Outside 事件会穿透到下方（原生问题），故用gray_layout多做一层补充作用（主要用于点击消失popwindow，避免事件穿透）
if (contentView.findViewById(R.id.gray_layout) != null) {
View grayLayout = (View) contentView.findViewById(R.id.gray_layout);
grayLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dismiss();
}
});
}
}
/**
* popup 消失
*/
public void dismiss() {
if (mPopupWindow != null && mPopupWindow.isShowing()) {
mPopupWindow.dismiss();
}
}
/**
* 相对于窗体的显示位置
*
* @param view 可以为Activity中的任意一个View（最终的效果一样），
* 会通过这个View找到其父Window，也就是Activity的Window。
* @param gravity 在窗体中的位置，默认为Gravity.NO_GRAVITY
* @param x 表示距离Window边缘的距离，方向由Gravity决定。
* 例如：设置了Gravity.TOP，则y表示与Window上边缘的距离；
* 而如果设置了Gravity.BOTTOM，则y表示与下边缘的距离。
* @param y
* @return
*/
public CustomPopupWindow showAtLocation(View view, int gravity, int x, int y) {
if (mPopupWindow != null) {
mPopupWindow.showAtLocation(view, gravity, x, y);
if (builder != null) setBackgroundAlpha(builder.backgroundAlpha); //设置窗体的背景透明度为半透明
}
return this;
}
/**
* 显示在anchor控件的正下方，或者相对这个控件的位置
*
* @param anchor 锚点
* @param xOff 相对这个控件x方向的偏移
* @param yOff 相对这个控件y方向的偏移
* @return
*/
// public CustomPopupWindow showAsDropDown(View anchor, int xOff, int yOff) {
// if (mPopupWindow != null) {
// if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
// //7.0以上系统
// //获取目标控件在屏幕中的坐标位置
// int[] location = new int[2];
// anchor.getLocationOnScreen(location);
// mPopupWindow.showAtLocation(anchor, Gravity.NO_GRAVITY, 0, location[1] + anchor.getHeight() + yOff);
// } else {
// mPopupWindow.showAsDropDown(anchor, xOff, yOff);
// }
// if (builder != null) setBackgroundAlpha(builder.backgroundAlpha); //设置窗体的背景透明度为半透明
// }
// return this;
// }
public CustomPopupWindow showAsDropDown(View anchor, int xOff, int yOff) {
if (mPopupWindow != null) {
if (!mPopupWindow.isShowing()) {
// 以下拉方式显示popupwindow
mPopupWindow.showAsDropDown(anchor, xOff, yOff);
if (builder != null) setBackgroundAlpha(builder.backgroundAlpha); //设置窗体的背景透明度为半透明
}
// else {
// this.dismiss();
// }
}
return this;
}
public CustomPopupWindow showAsDropDown(View anchor) {
if (mPopupWindow != null) {
if (!mPopupWindow.isShowing()) {
// 以下拉方式显示popupwindow
mPopupWindow.showAsDropDown(anchor);
if (builder != null) setBackgroundAlpha(builder.backgroundAlpha); //设置窗体的背景透明度为半透明
}
// else {
// this.dismiss();
// }
}
return this;
}
/**
* 根据id获取view
*
* @param viewId
* @return
*/
public View getItemView(int viewId) {
if (mPopupWindow != null) {
return contentView.findViewById(viewId);
}
return null;
}
/**
* 根据id设置pop内部的控件的点击事件的监听
*
* @param viewId
* @param listener
*/
public void setOnClickListener(int viewId, View.OnClickListener listener) {
View view = getItemView(viewId);
view.setOnClickListener(listener);
}
/**
* 设置Activity或者Fragment的背景透明度
*
* @param bgAlpha 背景的透明度
*/
public void setBackgroundAlpha(float bgAlpha) {
if (refActivity.get() == null || refActivity.get().getWindow() == null) return;
WindowManager.LayoutParams layoutParams = refActivity.get().getWindow().getAttributes();
layoutParams.alpha = bgAlpha; //0.0-1.0
refActivity.get().getWindow().setAttributes(layoutParams);
}
/**
* builder 类
*/
public static class Builder {
private int contentViewId; //pop的布局文件
private int width; //pop的宽度
private int height; //pop的高度
private int animStyle; //动画效果
private float backgroundAlpha = 0.5f; //背景的透明度，默认半透明
private boolean outsideTouchable = false; //设置点击外部可以取消
public Builder(Activity activity) {
refActivity = new WeakReference<>(activity);
}
public Builder setContentView(int contentViewId) {
this.contentViewId = contentViewId;
return this;
}
public Builder setwidth(int width) {
this.width = width;
return this;
}
public Builder setheight(int height) {
this.height = height;
return this;
}
public Builder setAnimationStyle(int animStyle) {
this.animStyle = animStyle;
return this;
}
public Builder setBackgroundAlpha(float backgroundAlpha) {
this.backgroundAlpha = backgroundAlpha;
return this;
}
public Builder setOutsideTouchable(boolean touchable) {
outsideTouchable = touchable;
return this;
}
public CustomPopupWindow build() {
return new CustomPopupWindow(this);
}
}
@Override
public void onDismiss() {
if (builder == null || builder.backgroundAlpha != 1f)
setBackgroundAlpha(1f); //设置窗体的背景透明度为不透明
}
}
使用方法：
private CustomPopupWindow mSearchDropPop;
/**
* 初始化Pop，pop的布局是一个列表
*/
private void initPop() {
if (mSearchDropPop == null || mSearchDropAdapter == null) {
mSearchDropPop = new CustomPopupWindow.Builder(this)
.setContentView(R.layout.search_drop_pop_window)
.setwidth(LinearLayout.LayoutParams.MATCH_PARENT)
.setheight(LinearLayout.LayoutParams.WRAP_CONTENT)
.setBackgroundAlpha(1.0f)
.build();
//搜索联想结果的列表
ListView searchLv = (ListView) mSearchDropPop.getItemView(R.id.lv_search_list);
mSearchDropAdapter = new SearchDropAdapter(this, null);
searchLv.setAdapter(mSearchDropAdapter);
searchLv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
mBinding.editTextSearch.setText(mSearchDropAdapter.getList().get(position).text);
mKeyword = mSearchDropAdapter.getList().get(position).text;
preSearch().search(mSearchDropAdapter.request_id); // 点击联想词
}
});
}
}
/**关键字联想词*/
mViewModel.mSearchDropData.observe(this, result -> {
if (result == null || result.getBeanList().size() <= 0) {
mSearchDropPop.dismiss();
} else {
String s = mBinding.editTextSearch.getText().toString();
if (s.length() > 0 && s.equals(mmSearchDropWord)) {
mSearchDropAdapter.setDatas(result);
mSearchDropAdapter.notifyDataSetChanged();
mSearchDropPop.showAsDropDown(mBinding.editTextSearch);
}
}
});
@Override
protected void onDestroy() {
if (mSearchDropPop != null) {
mSearchDropPop.dismiss();
}
super.onDestroy();
}
xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#66000000"
android:orientation="vertical">
<ListView
android:id="@+id/lv_search_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:divider="@null"
android:paddingTop="@dimen/dp_6" />
<!--该View用来撑满屏幕用 显示灰色透明背景-->
<View
android:id="@+id/gray_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F1F2F4" />
</LinearLayout>
