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微信朋友圈的点赞和评论功能,有2个组成部分:左下角的“更多”按钮;点击该按钮后弹出的对话框;
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PopupWindow,弹出框使用PopupWindow实现,这是点赞和评论的载体,具体要涉及 PopupWindow 点击非窗口位置和再次点击消失以及显示位置的问题(根据相应更多按钮的位置确定 PopupWindow 的显示位置
package com.example.cmm.helloworld; import android.app.AlertDialog; import android.content.Context; import android.graphics.drawable.BitmapDrawable; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.PopupWindow; import android.widget.TextView; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity { private PopupWindow mMorePopupWindow; private int mShowMorePopupWindowWidth; private int mShowMorePopupWindowHeight; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ListView lv = (ListView) findViewById(R.id.listview); lv.setAdapter(new MyAdapter(MainActivity.this, getData())); } private List getData() { List data = new ArrayList<>(); data.add(new Data(R.drawable.xiaona, "薄荷栗", "我学过跆拳道,都给我跪下唱征服", "昨天")); data.add(new Data(R.drawable.xueyan, "欣然", "走遍天涯海角,唯有我家风景最好,啊哈哈", "昨天")); data.add(new Data(R.drawable.leishao, "陈磊_CL", "老子以后要当行长的,都来找我借钱吧,now", "昨天")); data.add(new Data(R.drawable.yuhong, "永恒依然", "房子车子都到碗里来", "昨天")); data.add(new Data(R.drawable.lanshan, "蓝珊", "你们这群傻×,我笑而不语", "昨天")); return data; } class MyAdapter extends BaseAdapter { private List listdata; private Context context; public MyAdapter(Context context, List listdata) { this.context = context; this.listdata = listdata; } @Override public int getCount() { return listdata.size(); } @Override public Object getItem(int arg0) { return listdata.get(arg0); } @Override public long getItemId(int arg0) { return arg0; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.listview_item, null, false); // 带赋值区域 ImageView ivPortrait = (ImageView) convertView.findViewById(R.id.portrait); TextView tvNickName = (TextView) convertView.findViewById(R.id.nick_name); TextView tvContent = (TextView) convertView.findViewById(R.id.content); TextView tvCreatedAt = (TextView) convertView.findViewById(R.id.created_at); ImageView moreBtn = (ImageView) convertView.findViewById(R.id.more_btn); // 赋值 Data data = listdata.get(position); ivPortrait.setImageResource(data.getPortraitId()); tvNickName.setText(data.getNickName()); tvContent.setText(data.getContent()); tvCreatedAt.setText(data.getCreatedAt()); // 更多按钮的点击事件 moreBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { showMore(v); } }); return convertView; } /** * 弹出点赞和评论框 * * @param moreBtnView */ private void showMore(View moreBtnView) { if (mMorePopupWindow == null) { LayoutInflater li = (LayoutInflater) MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View content = li.inflate(R.layout.layout_more, null, false); mMorePopupWindow = new PopupWindow(content, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); mMorePopupWindow.setBackgroundDrawable(new BitmapDrawable()); mMorePopupWindow.setOutsideTouchable(true); mMorePopupWindow.setTouchable(true); content.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED); mShowMorePopupWindowWidth = content.getMeasuredWidth(); mShowMorePopupWindowHeight = content.getMeasuredHeight(); View parent = mMorePopupWindow.getContentView(); TextView like = (TextView) parent.findViewById(R.id.like); TextView comment = (TextView) parent.findViewById(R.id.comment); // 点赞的监听器 like.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this); alert.setTitle("点赞"); alert.setNegativeButton("取消", null); alert.show(); } }); // 评论的监听器 comment.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { final AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this); alert.setTitle("评论"); alert.setNegativeButton("取消", null); alert.show(); } }); } if (mMorePopupWindow.isShowing()) { mMorePopupWindow.dismiss(); } else { int heightMoreBtnView = moreBtnView.getHeight(); mMorePopupWindow.showAsDropDown(moreBtnView, -mShowMorePopupWindowWidth, -(mShowMorePopupWindowHeight + heightMoreBtnView) / 2); } } } class Data { private int portraitId; // 头像 private String nickName; // 昵称 private String content; // 说说 private String createdAt; // 发布时间 public Data(int portraitId, String nickName, String content, String createdAt) { this.portraitId = portraitId; this.nickName = nickName; this.content = content; this.createdAt = createdAt; } public int getPortraitId() { return portraitId; } public String getNickName() { return nickName; } public String getContent() { return content; } public String getCreatedAt() { return createdAt; } } }
以上所述是小编给大家介绍的Android中使用PopupWindow 仿微信点赞和评论弹出,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对创新互联网站的支持!