Question

求大神解释一下这段Android代码，全部。谢谢

Handler handler = new Handler() {

@Override
public void handleMessage(Message msg) {
if (msg.what==0x123)
{

String resStr = msg.obj.toString().trim();
if(resStr.equals("ok"))
{
Toast.makeText(MainActivity.this,"succ" , Toast.LENGTH_SHORT).show();
}else
{
Toast.makeText(MainActivity.this,"error" , Toast.LENGTH_SHORT).show();
}

JSONObject response;
try {
response = new JSONObject(msg.obj.toString().trim());
if(response.getBoolean("Msg"))
{
Toast.makeText(MainActivity.this,"succ" , Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(MainActivity.this,"error" , Toast.LENGTH_SHORT).show();
}
} catch (JSONException e) {
e.printStackTrace();
}

}
super.handleMessage(msg);

}
};
public void doPostCmd(final String url,final String dataStr) {
new Thread(new Runnable() {

@Override
public void run() {
MyHttpClient server = new MyHttpClient();
Message msg = new Message();
msg.obj = server.post(url, dataStr);
msg.what = 0x123;
handler.sendMessage(msg);

}
}).start();
}
protected void post(final String url) {

}

Answer 1

doPostCmd()方法发送消息给handler，handler接受信息执行相应命令

Answer 2

就是一个handler的使用方法，
发信息和接收处理信息