Android 仿微信朋友圈點(diǎn)贊和評論彈出框功能

更新時間：2016年11月15日 10:20:49 投稿：mrr

這篇文章主要介紹了Android 仿微信朋友圈點(diǎn)贊和評論彈出框功能的相關(guān)資料,非常不錯，具有參考解決價值，需要的朋友可以參考下

貢獻(xiàn)/下載源碼：https://github.com/mmlovesyy/PopupWindowDemo

本文簡單模仿微信朋友圈的點(diǎn)贊和評論彈出框，布局等細(xì)節(jié)請忽略，著重實現(xiàn)彈出框、發(fā)評論，及彈出位置的控制。

1. 微信彈出框

微信朋友圈的點(diǎn)贊和評論功能，有2個組成部分：

點(diǎn)擊左下角的“更多”按鈕，彈出對話框；

點(diǎn)擊評論，彈出輸入框，添加評論并在頁面中實時顯示；

微信朋友圈點(diǎn)贊和評論功能

2. 實際效果

本文將建一個 ListView，在其 Item 中簡單模仿微信的布局，然后著重實現(xiàn)彈出窗，并能發(fā)評論，忽略具體布局細(xì)節(jié)。具體效果如下：

3. 知識點(diǎn)清單

ListView

自定義 Adapter，重寫 getView()方法；

PopupWindow

彈出框使用PopupWindow實現(xiàn)，這是點(diǎn)贊和評論的載體，具體要涉及 PopupWindow 點(diǎn)擊非窗口位置和再次點(diǎn)擊消失以及顯示位置的問題（根據(jù)相應(yīng)更多按鈕的位置確定 PopupWindow 的顯示位置，關(guān)于 PopupWindow 的顯示位置，可以參考我的另一篇文章 Android PopupWindow 的顯示位置）；

LayoutInflater

使用LayoutInflater 動態(tài)加載PopupWindow 的布局，關(guān)于 LayoutInflater 的更多知識，參見我的另一篇博客 Android LayoutInflater ；

Activity 和 Item 的雙向通信

通過自定義 OnCommentListener() 來實現(xiàn) MainActivity（具體來說是屏幕底部評論框中的輸入的內(nèi)容）和 ItemView（動態(tài)的獲得上述輸入的評論內(nèi)容并展示在該ItemView 中）的通信，更多知識參見我的另一篇博客《燕過留聲：由 Activity 和 Fragment 的通信方法想到的》;

自定義控件

ListView 中的每個 Item 是一個自定義的 ItemView，記得要重寫構(gòu)造方法，否則會拋出 Android.view.InflateException 異常；

如果想實現(xiàn)微信評論那樣用戶名和內(nèi)容回復(fù)文字字體顏色不同，而且點(diǎn)擊評論用戶名觸發(fā)頁面跳轉(zhuǎn)等功能，請參見《布局優(yōu)化技巧筆記》之 ClickableSpan 章節(jié)；

4. 美工素材

由于 .apk 本質(zhì)上是個壓縮包，我們可以通過解壓得到該 .apk 文件的圖片素材和布局文件，更多獲得素材的方法參見我的另一篇博文如何獲得Android素材圖片。通過這種方式得到顏色、更多按鈕的樣式等素材，僅供學(xué)習(xí)之用，請勿做侵犯版權(quán)之事。尊重知識版權(quán)既是大勢所趨，也是終將使每個開發(fā)者受益的事。

文件夾r里存放圖片

找到更多按鈕

5. 關(guān)鍵代碼

開發(fā)環(huán)境：Android Studio 1.4.1 for Mac + ADT 21 + JDK 1.8.0。

MainAcitivity.Java

package main.zhaizu.com.popupwindowdemo;
import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import main.zhaizu.com.popupwindowdemo.model.Comment;
import main.zhaizu.com.popupwindowdemo.model.Item;
import main.zhaizu.com.popupwindowdemo.ui.ItemView;
public class MainActivity extends AppCompatActivity {
private ListView mListView;
private View mCommentView;
private MyAdapter myAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mListView = (ListView) findViewById(R.id.listview);
myAdapter = new MyAdapter(this, getData());
mListView.setAdapter(myAdapter);
mCommentView = findViewById(R.id.comment_view);
}
// build data
private ArrayList<Item> getData() {
int ITEM_COUNT = 20;
ArrayList<Item> data = new ArrayList<>();
data.add(new Item(R.drawable.xiaona, "薄荷栗", "我學(xué)過跆拳道，都給我跪下唱征服", "昨天"));
data.add(new Item(R.drawable.xueyan, "欣然", "走遍天涯海角，唯有我家風(fēng)景最好，啊哈哈", "昨天"));
data.add(new Item(R.drawable.leishao, "陳磊_CL", "老子以后要當(dāng)行長的，都來找我借錢吧，now", "昨天"));
data.add(new Item(R.drawable.yuhong, "永恒依然", "房子車子都到碗里來", "昨天"));
data.add(new Item(R.drawable.lanshan, "藍(lán)珊", "你們這群傻×，我笑而不語", "昨天"));
return data;
}
// custom adapter
private class MyAdapter extends BaseAdapter implements ItemView.OnCommentListener {
private Context context;
private ArrayList<Item> mData;
private Map<Integer, ItemView> mCachedViews = new HashMap<>();
public MyAdapter(Context context, ArrayList<Item> mData) {
this.context = context;
this.mData = mData;
}
@Override
public int getCount() {
return mData.size();
}
@Override
public Object getItem(int position) {
return mData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view;
if (convertView != null) {
view = convertView;
} else {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.listview_item, null, false);
}
if (view instanceof ItemView) {
Item data = (Item) getItem(position);
((ItemView) view).setData(data);
((ItemView) view).setPosition(position);
((ItemView) view).setCommentListener(this);
cacheView(position, (ItemView) view);
}
return view;
}
@Override
public void onComment(int position) {
showCommentView(position);
}
private void cacheView(int position, ItemView view) {
Iterator<Map.Entry<Integer, ItemView>> entries = mCachedViews.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry<Integer, ItemView> entry = entries.next();
if (entry.getValue() == view && entry.getKey() != position) {
mCachedViews.remove(entry.getKey());
break;
}
}
mCachedViews.put(position, view);
}
private void showCommentView(final int position) {
mCommentView.setVisibility(View.VISIBLE);
mCommentView.findViewById(R.id.submit).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
EditText et = (EditText) mCommentView.findViewById(R.id.edit);
String s = et.getText().toString();
if (!TextUtils.isEmpty(s)) {
// update model
Comment comment = new Comment(s);
mData.get(position).getComments().add(comment);
// update view maybe
ItemView itemView = mCachedViews.get(position);
if (itemView != null && position == itemView.getPosition()) {
itemView.addComment();
}
et.setText("");
mCommentView.setVisibility(View.GONE);
}
}
});
}
}
}

ItemView.java

package main.zhaizu.com.popupwindowdemo.ui;
import android.content.Context;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.ColorDrawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;
import main.zhaizu.com.popupwindowdemo.R;
import main.zhaizu.com.popupwindowdemo.model.Comment;
import main.zhaizu.com.popupwindowdemo.model.Item;
/**
* Created by cmm on 15/10/31.
*/
public class ItemView extends LinearLayout implements View.OnClickListener {
private int mPosition;
private Item mData;
private ImageView mPortraitView;
private TextView mUserNameView;
private TextView mContentView;
private TextView mCreatedAtView;
private LinearLayout mCommentLayout;
private View mMoreView;
private PopupWindow mMorePopupWindow;
private int mShowMorePopupWindowWidth;
private int mShowMorePopupWindowHeight;
private OnCommentListener mCommentListener;
public ItemView(Context context) {
super(context);
}
public ItemView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public interface OnCommentListener {
void onComment(int position);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mPortraitView = (ImageView) findViewById(R.id.portrait);
mUserNameView = (TextView) findViewById(R.id.nick_name);
mContentView = (TextView) findViewById(R.id.content);
mCreatedAtView = (TextView) findViewById(R.id.created_at);
mCommentLayout = (LinearLayout) findViewById(R.id.comment_layout);
mMoreView = findViewById(R.id.more_btn);
}
public void setPosition(int mPosition) {
this.mPosition = mPosition;
}
public void setCommentListener(OnCommentListener l) {
this.mCommentListener = l;
}
public void setData(Item data) {
mData = data;
mPortraitView.setImageResource(data.getPortraitId());
mUserNameView.setText(data.getNickName());
mContentView.setText(data.getContent());
updateComment();
mMoreView.setOnClickListener(this);
}
/**
* 彈出點(diǎn)贊和評論框
*
* @param moreBtnView
*/
private void showMore(View moreBtnView) {
if (mMorePopupWindow == null) {
LayoutInflater li = (LayoutInflater) getContext().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);
// 點(diǎn)贊的監(jiān)聽器
comment.setOnClickListener(this);
}
if (mMorePopupWindow.isShowing()) {
mMorePopupWindow.dismiss();
} else {
int heightMoreBtnView = moreBtnView.getHeight();
mMorePopupWindow.showAsDropDown(moreBtnView, -mShowMorePopupWindowWidth,
-(mShowMorePopupWindowHeight + heightMoreBtnView) / 2);
}
}
private void updateComment() {
if (mData.hasComment()) {
mCommentLayout.removeAllViews();
mCommentLayout.setVisibility(View.VISIBLE);
for (Comment c : mData.getComments()) {
TextView t = new TextView(getContext());
t.setLayoutParams(new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)));
t.setBackgroundColor(getResources().getColor(R.color.colorCommentLayoutBg));
t.setTextSize(16);
t.setPadding(5, 2, 0, 3);
t.setLineSpacing(3, (float) 1.5);
t.setText(c.getComment());
mCommentLayout.addView(t);
}
} else {
mCommentLayout.setVisibility(View.GONE);
}
}
@Override
public void onClick(View v) {
int id = v.getId();
if (id == R.id.more_btn) {
showMore(v);
} else if (id == R.id.comment) {
if (mCommentListener != null) {
mCommentListener.onComment(mPosition);
if (mMorePopupWindow != null && mMorePopupWindow.isShowing()) {
mMorePopupWindow.dismiss();
}
}
}
}
public int getPosition() {
return mPosition;
}
public void addComment() {
updateComment();
}
}

以上所述是小編給大家介紹的Android 仿微信朋友圈點(diǎn)贊和評論彈出框功能，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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