团队开发冲刺第九天（实现收藏，点赞，关注功能）

江湖小白博客 2024-04-21 1 0

昨天的bug今天已经完成，原因是布局的问题，导致评论数据部分没有显示出来。解决的办法是：用滑动布局将照片和评论数据包裹起来，之后设置总体的布局与底部评论栏间隔开。这样就不会使评论框挡住评论的数据。

今天的完成：实现收藏，点赞，关注功能。

遇到的困难有，在使用handler+Thread，子线程不能直接修改UI，需要创建handler对象，然后在子线程中发消息，然后在handler中捕获所需消息，实现响应。学会这个后，接下来就好设计收藏，点赞，关注这些功能，同时在逻辑思考上要设置图标的颜色变化，在这里我学习了一个“如何判断当前的资源文件是哪一个”，第二个比较繁琐的地方就是“做web服务器的访问数据请求”，比较容易。

不得不说这个handler+Thread线程真棒

明天的任务：实现全局搜索（含搜索记录）

代码：Android

package com.example.newbsh.UI.home.hometype.news.shownews;

import androidx.annotation.NonNull;

import androidx.annotation.RequiresApi;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;

import android.content.Context;

import android.os.Build;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.text.method.ScrollingMovementMethod;

import android.util.Log;

import android.view.Gravity;

import android.view.View;

import android.view.inputmethod.InputMethodManager;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.Toast;

import com.bumptech.glide.Glide;

import com.bumptech.glide.request.RequestOptions;

import com.example.newbsh.HttpUtil.HttpUtil;

import com.example.newbsh.MainActivity;

import com.example.newbsh.R;

import com.example.newbsh.UI.home.hometype.news.shownews.comment.BlogComment;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.lang.ref.WeakReference;

import java.util.Objects;

public class ShowNewsActivity extends AppCompatActivity implements View.OnClickListener {

TextView textViewtitle,textViewdoc,textViewdate,textViewbkauthorname;

LinearLayout piclinearLayout,commentLayout;

TextView msg;

Button send;

private ImageView support,collect,bkphoto;

private Button attention;

private String title,authorname;

private String username= MainActivity.getUserName();

private ShowBlogHandler blogHandler;

String url;

@RequiresApi(api = Build.VERSION_CODES.M)

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_show_news);

blogHandler = new ShowBlogHandler(this);

init();//初始化文章的内容

isAttention();//判断是否关注

isCollect();//判断是否收藏

isSupport();//判断是否点赞

showComment();//展示评论

}

private void init() {

textViewtitle = findViewById(R.id.NewsTitle);

textViewdoc = findViewById(R.id.Newsdoc);

textViewdate = findViewById(R.id.Newsdate);

piclinearLayout=findViewById(R.id.picturelinearlayout);

commentLayout=findViewById(R.id.comment_layout);

textViewdoc.setMovementMethod(new ScrollingMovementMethod());

support=findViewById(R.id.support);

collect=findViewById(R.id.collect);

attention=findViewById(R.id.attention);

msg=findViewById(R.id.msg);

send=findViewById(R.id.send);

bkphoto=findViewById(R.id.userphoto);

textViewbkauthorname=findViewById(R.id.bkname);

initdoc();

support.setOnClickListener(this);

collect.setOnClickListener(this);

attention.setOnClickListener(this);

send.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

String comment=msg.getText().toString();

if(comment.isEmpty()){

Toast.makeText(ShowNewsActivity.this, "发送内容不能为空", Toast.LENGTH_SHORT).show();

return;

}

writeComment(comment); //开启线程

}

});

}

public void onClick(View v) {

switch (v.getId()) {

case R.id.attention:

attentionAction();

break;

case R.id.collect:

collectAction();

break;

case R.id.support:

supportAction();

break;

default:

break;

}

private void isSupport() { //是否点赞

new Thread(new Runnable() {

@Override

public void run() {

Log.d("data", "点赞");

String requrl = "http://39.97.181.86/BaiXiaoSheng/findsupport?username=" + username + "&title=" + title + "";

boolean isthumb = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 300;

msg.obj = isthumb;

blogHandler.sendMessage(msg);

Log.d("点赞", String.valueOf(isthumb));

}

}).start();

}

private void isCollect() { //是否收藏

new Thread(new Runnable() {

@Override

public void run() {

Log.d("data", "收藏");

String requrl = "http://39.97.181.86/BaiXiaoSheng/findcollect?username=" + username + "&title=" + title + "";

boolean isStore = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 400;

msg.obj = isStore;

blogHandler.sendMessage(msg);

Log.d("收藏", String.valueOf(isStore));

}

}).start();

}

private void isAttention() { //是否关注

new Thread(new Runnable() {

@Override

public void run() {

Log.d("data", "关注");

String requrl = "http://39.97.181.86/BaiXiaoSheng/findattention?username=" + username + "&authorname=" + authorname + "";

boolean isAttention = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 500;

msg.obj = isAttention;

blogHandler.sendMessage(msg);

Log.d("关注", String.valueOf(isAttention));

}

}).start();

}

private void attentionAction() {

new Thread(new Runnable() {

@Override

public void run() {

String text = attention.getText().toString();

String requrl = "http://39.97.181.86/BaiXiaoSheng/attentionaction?username=" + username + "&authorname=" + authorname +

"&type=" + text.equals("关注") + "";

boolean flag = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 700;

msg.obj = flag;

blogHandler.sendMessage(msg);

}

}).start();

}

private void collectAction() {

new Thread(new Runnable() {

@Override

public void run() {

String requrl = "http://39.97.181.86/BaiXiaoSheng/collectaction?username=" + username + "&title=" + title + "&" +

"type=" + judegIsDraw(collect) + "";

boolean flag = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 800;

msg.obj = flag;

blogHandler.sendMessage(msg);

}

}).start();

}

private void supportAction() {

new Thread(new Runnable() {

@Override

public void run() {

String requrl = "http://39.97.181.86/BaiXiaoSheng/supportaction?username=" + username + "&title=" + title + "&" +

"type=" + judegIsDraw(support) + "";

boolean flag = Boolean.parseBoolean(String.valueOf(HttpUtil.sendPost(requrl, "")));

Message msg = new Message();

msg.what = 900;

msg.obj = flag;

blogHandler.sendMessage(msg);

}

}).start();

}

private boolean judegIsDraw(View view) { //判断当前资源文件

boolean flag=false;

switch (view.getId()) {

case R.id.collect:

flag= Objects.equals(((ImageView) view).getDrawable().getCurrent().getConstantState(),

getResources().getDrawable(R.drawable.ic_turned_in_not).getConstantState());

Log.d("collect",String.valueOf(flag));

break;

case R.id.support:

flag= Objects.equals(((ImageView) view).getDrawable().getCurrent().getConstantState(),

getResources().getDrawable(R.drawable.ic_thumb_not_up).getConstantState());

Log.d("support",String.valueOf(flag));

break;

default:

break;

}

return flag;

}

写评论调用的线程

private void writeComment(String comment)

{

new Thread(new Runnable() {

@Override

public void run() {

String reqdata="http://39.97.181.86/BaiXiaoSheng/sendnewscomment?username="+username+"&comment="+comment+"&title="+title;

String json=String.valueOf(HttpUtil.sendPost(reqdata,""));

Message msg=new Message();

msg.what=1000;

msg.obj=json;

blogHandler.sendMessage(msg);

Log.d("writecomment",json);

}

}).start();

}

初始化展示该博客的评论内容

private void showComment() {

new Thread(new Runnable() {

@Override

public void run() {

Log.d("data", "评论");

String requrl="http://39.97.181.86/BaiXiaoSheng/findallcomments?title="+title;

String json = String.valueOf(HttpUtil.sendPost(requrl, ""));

Message msg = new Message();

msg.what = 600;

msg.obj = json;

blogHandler.sendMessage(msg);

Log.d("评论", json);

}

}).start();

}

加载新闻文章

private void initdoc() {

Bundle bundle = getIntent().getExtras();

获取图片的链接

url=bundle.getString("url");

String []urls=url.split(" ");

设置文章的内容

if (bundle != null) {

title=bundle.getString("title");

textViewtitle.setText(bundle.getString("title"));

textViewdoc.setText(bundle.getString("doc"));

textViewdate.setText("文章发布时间为："+bundle.getString("date"));

textViewbkauthorname.setText(bundle.getString("authorname"));

authorname=bundle.getString("authorname");

Glide.with(this)

.load(bundle.getString("authorurl"))

.circleCrop()

.into(bkphoto);

} else {

Log.i("bundle", "为空。。。。。。");

}

动态加载图片

RequestOptions options = new RequestOptions()

.error(R.drawable.error)

.placeholder(R.drawable.loading);

for(int i=0;i

{

ImageView imageView=new ImageView(this);

Glide.with(this)

.load(urls[i])

.apply(options)

.into(imageView);

LinearLayout.LayoutParams layout = new LinearLayout.LayoutParams(

LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);

layout.setMargins(0, 10, 0, 0);

imageView.setLayoutParams(layout);

piclinearLayout.addView(imageView);

}

static class ShowBlogHandler extends Handler { //防止内存泄漏

private final ShowNewsActivity mcontext;

ShowBlogHandler(ShowNewsActivity activity) {

WeakReference weakReference = new WeakReference<>(activity);

mcontext = weakReference.get();

}

@SuppressLint("SetTextI18n")

@Override

public void handleMessage(@NonNull Message msg) {

super.handleMessage(msg);

switch (msg.what) {

case 300:

if (Boolean.parseBoolean(msg.obj.toString()))

mcontext.support.setImageResource(R.drawable.ic_thumb_up);

break;

case 400:

if (Boolean.parseBoolean(msg.obj.toString()))

mcontext.collect.setImageResource(R.drawable.ic_turned_in);

break;

case 500:

if (Boolean.parseBoolean(msg.obj.toString()))

mcontext.attention.setText("已关注");

break;

case 600:

try {

JSONArray comments = new JSONArray(msg.obj.toString());

Log.i("length:", ""+comments.length());

for (int i = 0; i < comments.length(); i++) {

JSONObject object = comments.getJSONObject(i);

BlogComment blogComment = new BlogComment(mcontext);

if (!object.isNull("imgurl")) {

Glide.with(mcontext)

.load(object.getString("imgurl"))

.circleCrop()

.into(blogComment.getImageView());

}

blogComment.getName().setText(object.getString("username"));

blogComment.getComment().setText(object.getString("comment"));

blogComment.getDate().setText(object.getString("date"));

Log.i("次数:", ""+object.getString("comment"));

mcontext.commentLayout.addView(blogComment,0);

}

} catch (JSONException e) {

e.printStackTrace();

}

break;

case 700:

if (Boolean.parseBoolean(msg.obj.toString())) {

String text = mcontext.attention.getText().toString();

if (text.equals("关注")) {

mcontext.attention.setText("已关注");

Toast toast = Toast.makeText(mcontext, "关注成功", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

} else {

mcontext.attention.setText("关注");

Toast toast = Toast.makeText(mcontext, "已取消关注", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

} else {

Toast toast = Toast.makeText(mcontext, "未知原因，操作失败", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

break;

case 800:

if (Boolean.parseBoolean(msg.obj.toString())) {

if (mcontext.judegIsDraw(mcontext.collect)) {

mcontext.collect.setImageResource(R.drawable.ic_turned_in);

Toast toast = Toast.makeText(mcontext, "收藏成功", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

} else {

mcontext.collect.setImageResource(R.drawable.ic_turned_in_not);

Toast toast = Toast.makeText(mcontext, "已取消收藏", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

} else {

Toast toast = Toast.makeText(mcontext, "未知原因，操作失败", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

break;

case 900:

if (Boolean.parseBoolean(msg.obj.toString())) {

if (mcontext.judegIsDraw(mcontext.support)) {

mcontext.support.setImageResource(R.drawable.ic_thumb_up);

Toast toast = Toast.makeText(mcontext, "点赞成功", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

} else {

mcontext.support.setImageResource(R.drawable.ic_thumb_not_up);

Toast toast = Toast.makeText(mcontext, "已取消点赞", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

} else {

Toast toast = Toast.makeText(mcontext, "未知原因，操作失败", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

}

break;

case 1000:

try {

JSONObject object=new JSONObject(msg.obj.toString());

BlogComment blogComment=new BlogComment(mcontext);

blogComment.getDate().setText(object.getString("date"));

blogComment.getComment().setText(object.getString("comment"));

blogComment.getName().setText(object.getString("username"));

if(!object.isNull("imgurl")){

if(object.getString("imgurl").length()>0)

Glide.with(mcontext)

.load(object.getString("imgurl"))

.circleCrop()

.into(blogComment.getImageView());

}

mcontext.commentLayout.addView(blogComment,0);

mcontext.msg.setText("");

mcontext.msg.clearFocus();

InputMethodManager imm= (InputMethodManager) mcontext.getSystemService(Context.INPUT_METHOD_SERVICE); //键盘收缩

if (imm != null) {

imm.hideSoftInputFromWindow(mcontext.msg.getWindowToken(),0);

}

Toast toast = Toast.makeText(mcontext, "评论成功", Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

} catch (JSONException e) {

e.printStackTrace();

}

break;

default:

break;

}

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团队开发冲刺第九天（实现收藏，点赞，关注功能）

团队开发冲刺第十天（实现页面展示评论数与点赞数）

团队开发冲刺第八天（实现评论功能）

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团队开发冲刺第九天（实现收藏，点赞，关注功能）

团队开发冲刺第十天（实现页面展示评论数与点赞数）

团队开发冲刺第八天（实现评论功能）

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