package com.zhy.blogcodes.intentservice;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.text.Html;
import android.widget.TextView;
import com.zhy.blogcodes.R;
public class HandlerThreadActivity extends AppCompatActivity
{
private TextView mTvServiceInfo;
private HandlerThread mCheckMsgThread;
private Handler mCheckMsgHandler;
private boolean isUpdateInfo;
private static final int MSG_UPDATE_INFO = 0x110;
//与UI线程管理的handler
private Handler mHandler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_thread_handler);
//创建后台线程
initBackThread();
mTvServiceInfo = (TextView) findViewById(R.id.id_textview);
}
@Override
protected void onResume()
{
super.onResume();
//开始查询
isUpdateInfo = true;
mCheckMsgHandler.sendEmptyMessage(MSG_UPDATE_INFO);
}
@Override
protected void onPause()
{
super.onPause();
//停止查询
isUpdateInfo = false;
mCheckMsgHandler.removeMessages(MSG_UPDATE_INFO);
}
private void initBackThread()
{
mCheckMsgThread = new HandlerThread("check-message-coming");
mCheckMsgThread.start();
mCheckMsgHandler = new Handler(mCheckMsgThread.getLooper())
{
@Override
public void handleMessage(Message msg)
{
checkForUpdate();
if (isUpdateInfo)
{
mCheckMsgHandler.sendEmptyMessageDelayed(MSG_UPDATE_INFO, 1000);
}
}
};
}
/**
* 模拟从服务器解析数据
*/
private void checkForUpdate()
{
try
{
//模拟耗时
Thread.sleep(1000);
mHandler.post(new Runnable()
{
@Override
public void run()
{
String result = "实时更新中,当前大盘指数:<font color='red'>%d</font>";
result = String.format(result, (int) (Math.random() * 3000 + 1000));
mTvServiceInfo.setText(Html.fromHtml(result));
}
});
} catch (InterruptedException e)
{
e.printStackTrace();
}
}
@Override
protected void onDestroy()
{
super.onDestroy();
//释放资源
mCheckMsgThread.quit();
}
}