Question

我想更改按钮上的文字。单击按钮点击api并将结果显示为“活动”或“非活动”但为此我必须刷新它但是我希望它更新，因为我单击按钮

Answer 1

final TextView mTextView = (TextView) findViewById(R.id.text);
...

// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
String url ="http://www.google.com";

// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        // Display the first 500 characters of the response string.
        mTextView.setText("Response is: "+ response.substring(0,500));
    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        mTextView.setText("That didn't work!");
    }
});
// Add the request to the RequestQueue.
queue.add(stringRequest);

Answer 2

使用Async任务执行网络操作。在doInBackground（）方法中返回结果并覆盖onPostExecute（）方法并设置对按钮的响应。

public class myClass extends AsyncTask<Void,Void,String>{

    @Override
    protected String doInBackground(Void... params) {

      //perform network operation and return response
      return response;
    }

    @Override
    protected void onPostExecute(String res){
      myButton.setText(res);
    }

}

点击api -Android更新按钮上的文字

2 个答案: