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stu

2024-10-13 15:49:39   215人阅读

1.Stu

public class Stu {
    private String name;
    private int age;
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    public void setAge(int age) {
        this.age = age;
    }
}
2.StuAdapter
public class StuAdapter extends BaseAdapter {
   List stuList;
Activity activity;
   public StuAdapter(List stuList,Activity activity){
this.stuList=stuList;
this.activity=activity;
}
    @Override
    public int getCount() {
        return stuList.size();
    }
 
    @Override
    public Object getItem(int position) {
        return stuList.get(position);
    }
 
    @Override
    public long getItemId(int position) {
        return position;
    }
 
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view=activity.getLayoutInflater().inflate(R.layout.listview_item,null);
 
        TextView textView_name=(TextView)view.findViewById(R.id.name);
        TextView textView_age=(TextView)view.findViewById(R.id.age);
 
        textView_name.setText(stuList.get(position).getName());
        textView_age.setText(stuList.get(position).getAge()+"");
       return view;  }
 
   
     
    
3.MainActivity
 public class MainActivity extends AppCompatActivity {
   List stuList=null;
ListView listView;
   public Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case 200:
                    if (stuList!=null){
                        StuAdapter stuAdapter=new StuAdapter(stuList,MainActivity.this);
                        listView.setAdapter(stuAdapter);
                    }
                    break;
                case -1:
                    Toast.makeText(MainActivity.this,"获取失败",Toast.LENGTH_SHORT).show();
                    break;
                case -2:
                    Toast.makeText(MainActivity.this,"获取异常",Toast.LENGTH_SHORT).show();
                    break;
                default:
                    Toast.makeText(MainActivity.this,"我也不知道为啥",Toast.LENGTH_SHORT).show();
                    break;
            }
        }
    };
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        listView=(ListView)findViewById(R.id.listview);
        getDateFromSeriver();
    }
 
    private void getDateFromSeriver() {
        final String path="";
        new Thread(){
            @Override
            public void run() {
                super.run();
                try {
                    URL url=new URL(path);
                    HttpURLConnection coon=(HttpURLConnection)url.openConnection();
                    coon.setRequestMethod("GET");
                    coon.setConnectTimeout(5000);
                    int code=coon.getResponseCode();
                    if (code==200){
                        InputStream inputStream=coon.getInputStream();
                        String abc=inputstream2string(inputStream);
                        JSONObject jsonObject=new JSONObject(abc);
                        if (jsonObject.getString("code").equals("200")){
                            String studata=http://www.mamicode.com/jsonObject.getString("data");
                            Gson gson=new Gson();
                            stuList=gson.fromJson("studata",new TypeToken>(){}.getType());
                            Message msg=new Message();
                            msg.what=200;
                            msg.obj=abc;
                            handler.sendMessage(msg);
                        }else {}
                    }else {
                        Message msg=new Message();
                        msg.what=-1;
                        handler.sendMessage(msg);
                    }
 
                }catch (Exception e){
                    Message msg=new Message();
                    msg.what=-2;
                    handler.sendMessage(msg);
                    e.printStackTrace();
                }
            }
        }.start();
    }
    private  String inputstream2string(InputStream inputStream) {
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            int length = 0;
            byte[] buffer = new byte[1024];
            while ((length = inputStream.read(buffer)) != -1) {
                baos.write(buffer, 0, length);
            }
            inputStream.close();
            baos.close();
            //或者用这种方法
            //byte[] result=baos.toByteArray();
            //return new String(result);
            return baos.toString();
        } catch (Exception e) {
            e.printStackTrace();
            return "获取失败";
        }
    }
}
4.布局文件
（1）mainactivity
   
 
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.believer.gougoude.MainActivity">
 
   
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
 
(2)listview_item.xml
 
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
   
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/name"
        android:text="姓名"/>
   
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/age"
        android:text="年龄"/>
.Stu  
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 StuAdapter
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MianActivity
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2.布局文件
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stu


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