用到的技术：bmob后端云、ListView
运行效果图：
项目结构图：
首先要配置好bmob的环境：https://www.cnblogs.com/hemeiwolong/p/12874714.html
剩下的看源码
manifests：
1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="com.mingrisoft.cooking"> 4 <!--允许联网 --> 5 <uses-permission android:name="android.permission.INTERNET" /> 6 <!--获取GSM（2g）、WCDMA（联通3g）等网络状态的信息 --> 7 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 8 <!--获取wifi网络状态的信息 --> 9 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> 10 <!--保持CPU 运转，屏幕和键盘灯有可能是关闭的,用于文件上传和下载 --> 11 <uses-permission android:name="android.permission.WAKE_LOCK" /> 12 <!--获取sd卡写的权限，用于文件上传和下载--> 13 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 14 <!--允许读取手机状态 用于创建BmobInstallation--> 15 <uses-permission android:name="android.permission.READ_PHONE_STATE" /> 16 17 <application 18 android:allowBackup="true" 19 android:icon="@mipmap/ic_launcher" 20 android:label="@string/app_name" 21 android:roundIcon="@mipmap/ic_launcher_round" 22 android:supportsRtl="true" 23 android:theme="@style/AppTheme"> 24 <activity android:name=".MainActivity"> 25 <intent-filter> 26 <action android:name="android.intent.action.MAIN" /> 27 28 <category android:name="android.intent.category.LAUNCHER" /> 29 </intent-filter> 30 </activity> 31 32 <provider 33 android:name="cn.bmob.v3.util.BmobContentProvider" 34 android:authorities="com.mingrisoft.cooking.BmobContentProvider"> //这里要改为自己的包名 35 </provider> 36 </application> 37 38 </manifest>
activity_main.xml：
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:app="http://schemas.android.com/apk/res-auto" 4 xmlns:tools="http://schemas.android.com/tools" 5 android:layout_width="match_parent" 6 android:layout_height="match_parent" 7 android:orientation="vertical" 8 tools:context=".MainActivity"> 9 10 <RelativeLayout 11 android:layout_width="match_parent" 12 android:layout_height="wrap_content"> 13 14 <ImageView 15 android:id="@+id/iv_hf_cook" 16 android:layout_width="wrap_content" 17 android:layout_height="wrap_content" 18 android:adjustViewBounds="true" 19 android:maxWidth="100dp" 20 android:maxHeight="100dp" 21 android:src="@drawable/cooking"/> 22 23 <TextView 24 android:id="@+id/tv_hf_title" 25 android:layout_toRightOf="@+id/iv_hf_cook" 26 android:text="厨艺讨论区" 27 android:textSize="20sp" 28 android:textStyle="bold" 29 android:layout_width="match_parent" 30 android:layout_height="wrap_content" /> 31 32 <TextView 33 android:layout_toRightOf="@+id/iv_hf_cook" 34 android:layout_below="@+id/tv_hf_title" 35 android:layout_width="wrap_content" 36 android:layout_height="wrap_content" 37 android:text="论坛介绍ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 38 fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"/> 39 </RelativeLayout> 40 41 <View 42 android:layout_width="match_parent" 43 android:layout_height="5px" 44 android:background="#dadef7"></View> 45 46 <ScrollView 47 android:layout_width="match_parent" 48 android:layout_height="wrap_content"> 49 </ScrollView> 50 51 <ListView 52 android:id="@+id/lv_hf_listview" 53 android:layout_width="match_parent" 54 android:layout_height="300dp" 55 android:dividerHeight="5dp" 56 android:layout_weight="1"> 57 </ListView> 58 59 <View 60 android:layout_width="match_parent" 61 android:layout_height="5px" 62 android:background="#dadef7"></View> 63 64 <LinearLayout 65 android:layout_width="match_parent" 66 android:layout_height="wrap_content"> 67 68 <EditText 69 android:id="@+id/et_hf_content" 70 android:layout_width="match_parent" 71 android:layout_height="wrap_content" 72 android:hint="发表东西吧" 73 android:maxLines="2" 74 android:layout_weight="1"/> 75 76 <Button 77 android:id="@+id/btn_hf_send" 78 android:layout_width="wrap_content" 79 android:layout_height="wrap_content" 80 android:text="发送"/> 81 </LinearLayout> 82 83 </LinearLayout>
content.xml：
1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout 3 xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" 4 android:layout_height="match_parent"> 5 6 <View 7 android:id="@+id/splitLine" 8 android:layout_width="match_parent" 9 android:layout_height="5px" 10 android:paddingTop="10dp" 11 android:paddingBottom="10dp" 12 android:background="#dadef7"></View> 13 14 <ImageView 15 android:id="@+id/headImage" 16 android:layout_below="@+id/splitLine" 17 android:layout_width="wrap_content" 18 android:layout_height="wrap_content" 19 android:src="@drawable/register" 20 android:maxHeight="100dp" 21 android:adjustViewBounds="true" 22 android:maxWidth="100dp"/> 23 24 <TextView 25 android:id="@+id/content_name" 26 android:maxWidth="100dp" 27 android:layout_below="@+id/headImage" 28 android:layout_width="wrap_content" 29 android:layout_height="wrap_content" 30 android:text="hemeiwolong"/> 31 32 <TextView 33 android:id="@+id/content_date" 34 android:layout_below="@+id/content_name" 35 android:layout_width="wrap_content" 36 android:layout_height="wrap_content" 37 android:maxWidth="100dp" 38 android:text="xxxx/xx/xx hh:mm:ss"/> 39 40 <TextView 41 android:id="@+id/content_content" 42 android:layout_marginLeft="110dp" 43 android:layout_width="match_parent" 44 android:layout_height="wrap_content" 45 android:text="fffffffffffffffffffffffffffffffffff 46 "/> 47 48 </RelativeLayout>
CookContent：
1 package com.mingrisoft.cooking; 2 3 import cn.bmob.v3.BmobObject; 4 5 public class CookContent extends BmobObject { 6 private String name; 7 private String date; 8 private String content; 9 10 public String getName() { 11 return name; 12 } 13 public void setName(String name) { 14 this.name = name; 15 } 16 public String getDate() { 17 return date; 18 } 19 public void setDate(String address) { 20 this.date = address; 21 } 22 23 public String getContent() { 24 return content; 25 } 26 public void setContent(String content) { 27 this.content = content; 28 } 29 }
MainActivity：
1 package com.mingrisoft.cooking; 2 3 import android.app.Activity; 4 import android.support.v7.app.AppCompatActivity; 5 import android.os.Bundle; 6 import android.util.Log; 7 import android.view.View; 8 import android.widget.Button; 9 import android.widget.EditText; 10 import android.widget.ListView; 11 import android.widget.SimpleAdapter; 12 import android.widget.Toast; 13 14 import java.text.SimpleDateFormat; 15 import java.util.ArrayList; 16 import java.util.Date; 17 import java.util.HashMap; 18 import java.util.List; 19 import java.util.Map; 20 21 import cn.bmob.v3.Bmob; 22 import cn.bmob.v3.BmobQuery; 23 import cn.bmob.v3.datatype.BmobQueryResult; 24 import cn.bmob.v3.exception.BmobException; 25 import cn.bmob.v3.listener.FindListener; 26 import cn.bmob.v3.listener.SQLQueryListener; 27 import cn.bmob.v3.listener.SaveListener; 28 29 public class MainActivity extends Activity { 30 31 @Override 32 protected void onCreate(Bundle savedInstanceState) { 33 super.onCreate(savedInstanceState); 34 setContentView(R.layout.activity_main); 35 36 //初始化 Bmob SDK，第一个参数为上下文，第二个参数为Application ID 37 Bmob.initialize(this, "1368b7fd0a523efab971eb807e1b9bc2"); 38 39 Button send = findViewById(R.id.btn_hf_send); 40 EditText et_hf_content = findViewById(R.id.et_hf_content); 41 ListView listView = findViewById(R.id.lv_hf_listview); 42 43 BmobQuery<CookContent> query = new BmobQuery<CookContent>(); 44 45 String bql ="select * from CookContent";//查询所有的游戏得分记录 46 new BmobQuery<CookContent>().doSQLQuery(bql,new SQLQueryListener<CookContent>(){ 47 48 @Override 49 public void done(BmobQueryResult<CookContent> result, BmobException e) { 50 if(e ==null){ 51 List<CookContent> list = (List<CookContent>) result.getResults(); 52 if(list!=null && list.size()>0){ 53 ArrayList<Map<String, String>> resultList = new ArrayList<>(); 54 55 for (CookContent cookContent : list) { 56 Map<String, String> map = new HashMap<>(); 57 map.put("name", cookContent.getName()); 58 map.put("date", cookContent.getDate()); 59 map.put("content", cookContent.getContent()); 60 resultList.add(map); 61 } 62 63 SimpleAdapter simpleAdapter = new SimpleAdapter(MainActivity.this, resultList, 64 R.layout.content, new String[]{"name", "date", "content"}, 65 new int[] {R.id.content_name, R.id.content_date, R.id.content_content}); 66 listView.setAdapter(simpleAdapter); 67 } else { 68 Log.i("smile", "查询成功，无数据返回"); 69 Toast.makeText(MainActivity.this, "讨论区还没内容哦！", Toast.LENGTH_LONG).show(); 70 } 71 } else { 72 Log.i("smile", "错误码："+e.getErrorCode()+"，错误描述："+e.getMessage()); 73 Toast.makeText(MainActivity.this, "错误码："+e.getErrorCode()+"，错误描述："+e.getMessage(), Toast.LENGTH_LONG).show(); 74 } 75 } 76 }); 77 78 send.setOnClickListener(new View.OnClickListener() { 79 @Override 80 public void onClick(View view) { 81 String content = et_hf_content.getText().toString(); 82 if (content.equals("")) { 83 Toast.makeText(MainActivity.this, "发送内容为空！", Toast.LENGTH_LONG).show(); 84 } else { 85 CookContent cookContent = new CookContent(); 86 cookContent.setName("hemeiwolong"); 87 Date date = new Date(); 88 SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); 89 cookContent.setDate(simpleDateFormat.format(date)); 90 cookContent.setContent(content); 91 cookContent.save(new SaveListener<String>() { 92 @Override 93 public void done(String objectId,BmobException e) { 94 if(e==null){ 95 Toast.makeText(MainActivity.this, "添加数据成功，返回objectId为："+objectId, Toast.LENGTH_LONG).show(); 96 onCreate(null); 97 }else{ 98 Toast.makeText(MainActivity.this, "创建数据失败：" + e.getMessage(), Toast.LENGTH_LONG).show(); 99 } 100 } 101 }); 102 } 103 } 104 }); 105 } 106 }