RoboBinding探究三：网络请求实现

@SuppressLint("HandlerLeak")
public class TestActivity extends Activity {

	private Handler mHandler;
	private PresentationModelChangeSupport changeSupport;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		PresentationModel presentationModel = new PresentationModel(
				TestActivity.this);
		changeSupport = presentationModel.getPresentationModelChangeSupport();
		ViewBinder viewBinder = createViewBinder();
		View rootView = viewBinder.inflateAndBind(R.layout.activity_test,
				presentationModel);
		setContentView(rootView);
		// 处理消息，更新UI
		mHandler = new Handler() {
			@Override
			public void handleMessage(Message msg) {
				switch (msg.what) {
				case 0x01:
					changeSupport.firePropertyChange("http");
					break;
				default:
					break;
				}
			}
		};

	}

	private ViewBinder createViewBinder() {
		BinderFactory reusableBinderFactory = new BinderFactoryBuilder()
				.build();
		return reusableBinderFactory.createViewBinder(this);
	}

	public Handler getHandler() {
		return mHandler;
	}
}

@org.robobinding.annotation.PresentationModel
public class PresentationModel implements HasPresentationModelChangeSupport {
	private PresentationModelChangeSupport changeSupport;
	private String result;
	private TestActivity context;

	public PresentationModel(TestActivity context) {
		this.context = context;
		changeSupport = new PresentationModelChangeSupport(this);
	}

	public String getHttp() {
		return "网络数据：" + result;
	}

	public void httpRequest() {
		changeSupport.firePropertyChange("http");
		// 网络请求
		myRequest();
	}

	public void myRequest() {
		AsyncHttpClient client = new AsyncHttpClient();
		String urlString = "http://apis.baidu.com/apistore/weatherservice/citylist";
		client.get(urlString, new AsyncHttpResponseHandler() {
			@Override
			public void onSuccess(String response) {
				result = response;
				Log.e("网络请求成功", response);
				//
				Handler handler = context.getHandler();
				if (handler != null) {
					Message msg = handler.obtainMessage();
					msg.what = 0x01;
					handler.sendMessage(msg);
				}
			}

			@Override
			public void onFailure(Throwable arg0) {
				Log.e("网络请求失败", "失败");
			}
		});
	}

	@Override
	public PresentationModelChangeSupport getPresentationModelChangeSupport() {
		return changeSupport;
	}

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:bind="http://robobinding.org/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:ignore="MissingPrefix" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="30dp"
        bind:text="{http}" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="网络请求"
        bind:onClick="httpRequest" />

</LinearLayout>