**

## MainActivity

**
public class DemoActivity extends AppCompatActivity {

  private ListView mLVContents;
  private DemoAdapter mAdapter;
  private final int  UPDATE_UI = 1;
  private Handler mHandler = new Handler(){
    @Override public void handleMessage(Message msg) {
      switch (msg.what) {
        case UPDATE_UI:
          mAdapter.setmDatas((List<List<String>>) msg.obj);
          break;
      }
    }
  };

  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    mLVContents = findViewById(R.id.lv_contents);
    mAdapter = new DemoAdapter(this);
    mLVContents.setAdapter(mAdapter);


    findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
      @Override public void onClick(View v) {
        //網路判斷
        if(!NetUtil.hasNetwork(DemoActivity.this)) {
          showNotNetworkDialog();
          return;
        }

        //查詢資料
        new Thread(new Runnable() {
          @Override public void run() {
            initData();
          }
        }).start();
      }
    });

    mLVContents.setOnItemClickListener(new AdapterView.OnItemClickListener() {
      @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        List<String> data = mAdapter.getItem(position);
        Toast.makeText(DemoActivity.this, data.get(0) + ":" +data.get(1), Toast.LENGTH_LONG).show();
      }
    });
  }

  private void showNotNetworkDialog() {
    new AlertDialog.Builder(this)
        .setTitle("沒有可用網路")
        .setMessage("當前網路不可用，是否去設定")
        .setPositiveButton("確認", new DialogInterface.OnClickListener() {
          @Override public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
            Toast.makeText(DemoActivity.this, "去設定", Toast.LENGTH_LONG).show();
          }
        })
        .setNegativeButton("取消", new DialogInterface.OnClickListener() {
          @Override public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
          }
        })
        .show();
  }

  String urlStr = "https://suggest.taobao.com/sug?code=utf-8&q=%E6%89%8B%E6%9C%BA";

  private void initData() {
    try {
      URL url = new URL(urlStr);
      HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
      // 請求方法  超時
      int responseCode = urlConnection.getResponseCode();
      if(responseCode == 200) {
        String result = stream2String(urlConnection.getInputStream());
        Bean bean = new Gson().fromJson(result, Bean.class);
        mHandler.sendMessage(mHandler.obtainMessage(UPDATE_UI, bean.getResult()));
      }
    } catch (MalformedURLException e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  private String stream2String(InputStream inputStream) throws IOException {
    StringBuilder sb = new StringBuilder();

    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
    for (String tmp = br.readLine(); tmp != null; tmp = br.readLine()){
      sb.append(tmp);
    }

    return sb.toString();
  }
}


## **Adapter**

public class DemoAdapter extends BaseAdapter {

  private List<List<String>> mDatas;
  private Context mContext;

  public DemoAdapter(Context context) {
    this.mContext = context;
    //初始化 為什麼在這裡寫
    mDatas = new ArrayList<>();
  }

  //外部呼叫 更新資料
  public void setmDatas(List<List<String>> mDatas) {
    this.mDatas = mDatas;
    notifyDataSetChanged();
  }

  @Override public int getCount() {
    return mDatas.size();
  }

  @Override public List<String> getItem(int position) {
    List<String> item = mDatas.get(position);
    //return item.get(0);
    //return mDatas.get(position).get(0);
    return item;
  }

  @Override public long getItemId(int position) {
    return position;
  }

  //parent = ListView
  @Override public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder vh;
    //複用，不重複建立View
    if(convertView == null) {
      //convertView = View.inflate(mContext, R.layout.item, null);
      convertView = LayoutInflater.from(mContext).inflate(R.layout.item, parent, false);
      vh = new ViewHolder();
      vh.mIcon = convertView.findViewById(R.id.iv_icon);
      vh.mText = convertView.findViewById(R.id.tv_text);
      convertView.setTag(vh);
    } else {
      vh = (ViewHolder) convertView.getTag();
    }

    //TODO 設定圖片

    //設定 資料
    //vh.mText.setText(getItem(position));
    vh.mText.setText(getItem(position).get(0));

    return convertView;
  }

  class ViewHolder {
    private ImageView mIcon;
    private TextView mText;
  }
}


**

## Bean

**
public class Bean {
  public List<List<String>> result;

  public List<List<String>> getResult() {
    return result;
  }
}