import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
 
import butterknife.BindView;
import butterknife.ButterKnife;
import butterknife.OnClick;
public class MainActivity extends AppCompatActivity implements Runnable {
    List<HashMap<String,Object>> data;
    private static final int TAG =0X1;//用於Handler中的非同步處理標誌
Thread thread = null;//宣告執行緒，用於執行NewsServer中的網路訪問
 
Handler handler = new Handler() {
        @Override
public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what){
                case TAG:
                    SimpleAdapter simpleAdapter = new SimpleAdapter(MainActivity.this,data,R.layout.item,new String[]{"title"
 
,"timelength"},new int[]{R.id.title,R.id.timelength});
listview.setAdapter(simpleAdapter);
                    break;
}
        }
    };
@BindView(R.id.btn_refresh)
    Button btnRefresh;
@BindView(R.id.listview)
    ListView listview;
@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);//這裡使用了ButterKnife元件來初始化元件和繫結id，不懂得自行百度
}
    
    @OnClick(R.id.btn_refresh)
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.btn_refresh:
                thread = new Thread(this);
thread.start();
                break;
}
    }
    
    @Override
public void run() {
        String length = getResources().getString(R.string.timelength);
List<News> news = NewsService.getJsonLastNews();//這裡必須另起一個執行緒訪問，不能在主執行緒中訪問
data = new ArrayList<>();
        for(News news1:news){
            HashMap<String,Object> item  = new HashMap<>();
item.put("id",news1.getId());
item.put("title",news1.getTitile());
item.put("timelength",length+": "+news1.getTimelength());
data.add(item);
}
        Message msg = new Message();
msg.what=TAG;
handler.sendMessage(msg);//通知元件更新介面
}
}