OkHTTP从入队回调中更新UI

问题描述

我正在尝试使用OkHTTP库.呼叫服务器并获得成功的响应时.我需要更新用户界面.

I am trying to use OkHTTP library. When making a call to the server and getting a successful response back. i need to update the UI.

使用enqueue()进行异步调用时怎么办?

How can this be done when doing an Async call using the enqueue()?

client.newCall(request).enqueue(new Callback() {

    @Override
    public void onFailure(Request request, IOException e) {

    }

    @Override
    public void onResponse(Response response) throws IOException {

        if (response.isSuccessful()) {

            // NEED TO UPDATE UI HERE

        } 
    }
});

推荐答案

您可以参考以下示例代码，希望对您有所帮助！

You can refer to the following sample code, hope this helps!

public class MainActivity extends AppCompatActivity {
    private static final String LOG_TAG = "OkHttp";
    private TextView mTextView;
    private Handler mHandler;
    private String mMessage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTextView = (TextView) findViewById(R.id.textView);
        mHandler = new Handler(Looper.getMainLooper());
        OkHttpClient client = new OkHttpClient();
        // GET request
        Request request = new Request.Builder()
                .url("http://...")
                .build();
        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Request request, IOException e) {
                mMessage = e.toString();
                Log.e(LOG_TAG, mMessage); // no need inside run()
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        mTextView.setText(mMessage); // must be inside run()
                    }
                });
            }

            @Override
            public void onResponse(Response response) throws IOException {
                mMessage = response.toString();
                Log.i(LOG_TAG, mMessage); // no need inside run()
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        mTextView.setText(mMessage); // must be inside run()
                    }
                });
            }
        });
    }
}

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