package spt.http.get.activity;import java.lang.ref.WeakReference;import spt.http.get.assist.SendDataToServer;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends Activity {	//view.	private EditText edt_name = null;	private EditText edt_pwd = null;	private Button btn_ok = null;	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		initView();		initListener();	}		/**	 * 初始化View.	 */	private void initView() {		edt_name = (EditText)findViewById(R.id.edt_name);		edt_pwd = (EditText)findViewById(R.id.edt_pwd);		btn_ok = (Button)findViewById(R.id.btn_ok);				//test:		edt_name.setText("你好");		edt_pwd.setText("abc");	}		/**使用静态内部类,解决‘This Handler class should be static or leaks might occur‘,以免造成内存泄露.	 * @author Administrator	 *	 */	private static class StatusHandler extends Handler {		WeakReference<MainActivity>  iMainActivity = null;				public StatusHandler(MainActivity mainActivity) {			iMainActivity = new WeakReference<MainActivity>(mainActivity);		}				@Override		public void handleMessage(Message msg) {			switch (msg.what) {			case SendDataToServer.SEND_SUCCESS:				//有iMainActivity.get()和iMainActivity.getClass().				Toast.makeText(iMainActivity.get(), "发送成功", Toast.LENGTH_SHORT).show();				break;			case SendDataToServer.SEND_FAIL:				Toast.makeText(iMainActivity.get(), "发送失败", Toast.LENGTH_SHORT).show();				break;			default:				throw new RuntimeException("未知的发送结果!");			}		}	}	/**	 * 处理发送是否成功的状态的Handler.	 */	private final  Handler handler = new StatusHandler(this);		/**	 * 初始化监听器.	 */	private void initListener() {		btn_ok.setOnClickListener(new Button.OnClickListener() {						@Override			public void onClick(View v) {				String name = edt_name.getText().toString();				String pwd = edt_pwd.getText().toString();				if(name.isEmpty() || pwd.isEmpty()) {					Toast.makeText(MainActivity.this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show();					return;				}				new SendDataToServer(handler).send(name, pwd);			}		});	}}