1.上类图
2.上效果图
3.实现思路
为了，便于调试、解耦、代码结构清晰。首先先到的就是进行封装处理。同时便于日后其他项目复用。不进行重复造轮子。
4.功能介绍
4.1 根据popwindow的显示隐藏进行回调小三角的style（向上，向下）。
4.2 监听item点击，进行状态选择切换。
4.3 进行选中态默认，当前选择的是第几个item，popwindow弹出来。默认选中第几个 item。
4.4 根据屏幕的宽度，设置popwindow 位置居中向上偏移一些。
4.5 给popwindow弹出动画
5.核心代码分析
package com.nuoyuan.sp2p.widget.home;
import android.content.Context;
import android.graphics.drawable.BitmapDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import com.nuoyuan.sp2p.R;
import com.nuoyuan.sp2p.activity.info.ProductionListActivity;
import com.nuoyuan.sp2p.util.LogUtil;
import java.util.ArrayList;
/**
* Created by weichyang on 2016/6/15.
*/
public class VPopWindow extends PopupWindow {
private Context context;
/**
* 展示列表
*/
private ArrayList<String> titles;
/**
* 依附于view
*/
private View anchorView;
private PopUpwindowLayout popUpwindowLayout;
private View contentView;
/**
* 构造方式
*
* @param context
* @param anchorView
*/
public VPopWindow(Context context, View anchorView, ArrayList<String> titles) {
super(context, null);
this.titles = titles;
this.context = context;
this.anchorView = anchorView;
initPopWindowParameter();
}
private void initPopWindowParameter() {
contentView = LayoutInflater.from(context).inflate(R.layout.layout_popupwindow, null);
this.setContentView(contentView);
this.setWidth(LinearLayout.LayoutParams.WRAP_CONTENT);
this.setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);
this.setFocusable(true);
popUpwindowLayout = (PopUpwindowLayout) contentView.findViewById(R.id.llayout_popupwindow);
popUpwindowLayout.initViews(context, titles);
contentView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
// 允许点击外部消失
this.setBackgroundDrawable(new BitmapDrawable());
this.setOutsideTouchable(true);
this.setAnimationStyle(R.style.popwindow_anim_style);
}
/**
* 设置显示位置
*
* @param anchorView
*/
public void showVpAsDropDown(View anchorView) {
this.showAsDropDown(anchorView);
}
/**
* 显示偏移量
*
* @param anchorView
* @param x
* @param y
*/
public void showVpAsDropDown(View anchorView, int x, int y) {
int[] location = new int[2];
anchorView.getLocationOnScreen(location);
this.showAsDropDown(anchorView, x, y);
}
/**
* 设置点击监听
*
* @param onItemClick
*/
public void setOnItemClick(PopUpwindowLayout.OnClickCallback onItemClick) {
if (popUpwindowLayout == null) {
popUpwindowLayout = (PopUpwindowLayout) contentView.findViewById(R.id.llayout_popupwindow);
}
popUpwindowLayout.setClickListener(onItemClick);
}
/**
* 设置默认选中项
*
* @param index
*/
public void itemSelected(int index) {
if (popUpwindowLayout != null) {
popUpwindowLayout.setSelectedIndex(index);
} else {
LogUtil.e("popUpWindowLayout is null");
}
}
}
// item 类。主要对的item的点击事件进行设置。提供外部访问的接口，选中状态设置的。这里使用代码，没有使用xml shape文件形式。更灵活
package com.nuoyuan.sp2p.widget.home;
import android.content.Context;
import android.content.res.ColorStateList;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.nuoyuan.sp2p.R;
import com.nuoyuan.sp2p.util.DensityUtil;
import com.nuoyuan.sp2p.util.DeviceUtil;
import com.nuoyuan.sp2p.util.StringUtil;
import java.util.ArrayList;
import java.util.List;
/**
* Created by weichyang on 2016/6/14.
* 弹窗view
*/
public class PopUpwindowLayout extends LinearLayout {
private Context mContext;
private OnClickCallback mCallback;
private List<TextView> txtViewList;
public PopUpwindowLayout(Context context) {
this(context, null);
}
public PopUpwindowLayout(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PopUpwindowLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setOrientation(VERTICAL);
setBackgroundResource(R.drawable.bmap_bg);
init();
}
private void init() {
txtViewList = new ArrayList<>();
}
/**
* 设置标题内容
*
* @param context
* @param titles 标题文字内容
*/
public void initViews(Context context, List<String> titles) {
initViews(context, titles, false);
}
/**
* 设置标题内容
*
* @param context
* @param titles 标题文字内容
* @param hasDraw 是否带右侧向下箭头
*/
public void initViews(Context context, List<String> titles, boolean hasDraw) {
this.mContext = context;
setLayoutContent(mContext, titles, hasDraw);
}
/**
* 设置条目点击监听
*/
public void setClickListener(OnClickCallback callback) {
this.mCallback = callback;
}
/**
* 设置内容
*
* @param context
* @param titles
* @param hasDraw
*/
private void setLayoutContent(Context context, final List<String> titles, boolean hasDraw) {
removeAllViews();
if (titles != null && titles.size() > 0) {
// 不带箭头
if (!hasDraw) {
for (int i = 0; i < titles.size(); i++) {
final int index = i;
final TextView textView = new TextView(context);
// 文本
textView.setText(titles.get(i));
// 颜色
float titleSize = getContext().getResources().getDimension(R.dimen.sp_18);
// 字体
textView.setTextSize(DensityUtil.px2dip(context, titleSize));
textView.setGravity(Gravity.CENTER);
textView.setPadding(20, 0, 20, 0);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, DeviceUtil.dip2px(context, 35), Gravity.CENTER);
params.gravity = Gravity.CENTER;
textView.setLayoutParams(params);
textView.setTextColor(createColorStateList(0xffffffff, 0xffC0A78A, 0xffffffff, 0xffffffff));
textView.setBackgroundDrawable(getResources().getDrawable(R.drawable.investment_pop_selector));
addView(textView);
// addDividingLine(context, titles, i);
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mCallback != null) {
mCallback.onItemClick(PopUpwindowLayout.this, titles.size(), index);
}
}
});
// TODO: 2016/6/22 避免重复添加
if (i == 0) {
txtViewList.clear();
txtViewList.add(textView);
} else {
txtViewList.add(textView);
}
}
}
} else {
throw new RuntimeException("title counts is less than 0");
}
}
/**
* 增加中间分割线
*
* @param context
* @param titles
* @param i
*/
private void addDividingLine(Context context, List<String> titles, int i) {
if (i < titles.size() - 1) {
LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 1);
layoutParams.gravity = Gravity.CENTER_VERTICAL;
View view = new View(context);
view.setLayoutParams(layoutParams);
view.setBackgroundResource(R.color.gray_9);
addView(view);
}
}
/**
* http://blog.net/abc6368765/article/details/51482317
*
* @param normal
* @param pressed
* @param focused
* @param unable
* @return
*/
private ColorStateList createColorStateList(int normal, int pressed, int focused, int unable) {
int[] colors = new int[]{pressed, focused, normal, focused, unable, normal};
int[][] states = new int[6][];
states[0] = new int[]{android.R.attr.state_pressed, android.R.attr.state_enabled};
states[1] = new int[]{android.R.attr.state_enabled, android.R.attr.state_focused};
states[2] = new int[]{android.R.attr.state_enabled};
states[3] = new int[]{android.R.attr.state_focused};
states[4] = new int[]{android.R.attr.state_window_focused};
states[5] = new int[]{};
ColorStateList colorList = new ColorStateList(states, colors);
return colorList;
}
/**
* 点击事件接口
*/
public interface OnClickCallback {
/**
* 点击子视图时调用
*
* @param parentView 当前操作的View视图
* @param size 当前视图中子视图数量
* @param index 当前点击子视图索引
*/
void onItemClick(LinearLayout parentView, int size, int index);
}
/**
* 选中
*
* @param index
*/
public void setSelectedIndex(int index) {
if (!txtViewList.isEmpty())
for (int i = 0; i < txtViewList.size(); i++) {
if (i == index) {
txtViewList.get(i).setPressed(true);
} else {
txtViewList.get(i).setPressed(false);
}
}
}
}
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