Question

View.Visible在Android中正好运行上述版本5.0，但不能在Kitkat版本上运行。没有得到实际问题，我搜索了很多，但没有得到解决方案是我的代码。提前谢谢

 public class mainActivity extends AppCompatActivity implements View.OnClickListener {
      Button button1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_stb_commands);

    button1 = (Button)findViewById(R.id.button1);

    button1.setOnClickListener(this);

    button1.setVisibility(View.GONE);

}
 @Override
public void onClick(View view) {
    switch (view.getId()){
        case R.id.button1:
            HashMap data = new HashMap();
            new mainActivity.AsyncTaskGenre(data).execute();
            break;
        }
    }


@Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(mainActivity.this);
        pDialog.setMessage("Loading...");
        pDialog.show();

    }
    @Override
    protected String doInBackground(Void... params) {
        String request = "http://";
        try {
            JSONObject json = jsonParser.makeHttpRequest(request, "POST",data);
            return json.toString();
        } catch (Exception e){
            e.printStackTrace();
        }
        return null;
    }
    @Override
    protected void onPostExecute(String s) {
        super.onPostExecute(s);
        pDialog.dismiss();
        Log.d("RESULT ",""+s);
        if (s != null) {
            try {
                JSONObject jsonObject = new JSONObject(s);

                String error = jsonObject.get("error").toString();
                Log.d("RESULT", " " +error);
                if (error.equals("false"))
                {
                         button1.setVisibility(View.VISIBLE);

                }
                else
                {
                    Toast.makeText(getApplicationContext(),"not found...!",Toast.LENGTH_SHORT).show();

                }

            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
        else{
            Toast.makeText(getApplicationContext(),"check connection...!",Toast.LENGTH_LONG).show();
        }
    }
}

Answer 1

首先正确比较您的字符串值

Code Rectify

if (error.equals("false")) // Why you set == ? 
            {
                     button1.setVisibility(View.VISIBLE);

            }
            else
            {
                Toast.makeText(getApplicationContext(),"not found...!",Toast.LENGTH_SHORT).show();

            }

<强> FYI

JSON响应是

{ “错误”：假， “1”：{ “ID”：6中， “名称”： “黄芪多糖”}}

  String getError=jsonObject .getString("error").toString();

现在做你的代码

 if (error.equals("false")) 
            {
                     button1.setVisibility(View.VISIBLE);

            }

Answer 2

在java中，您可以使用equels代替==

  if (error.equalsIgnoreCase("false"))
        {
                 button1.setVisibility(View.VISIBLE);

        }
        else
        {
            Toast.makeText(getApplicationContext(),"not found...!",Toast.LENGTH_SHORT).show();

        }

Answer 3

在onPostExecution（）方法中附加调试器，并根据响应处理您的条件。因为＆＃34; jsonObject.get（＆＃34;错误＆＃34;）。toString（）＆＃34; this.SO调试并且你可以回答你的反应.SetVisiblity没有任何问题（ View.VISIBLE）。休息你的代码似乎没问题。试一试然后回复。

Answer 4

我发现解决问题的问题谢谢你们。

    JSONObject jsonObject = new JSONObject(s);

                String error = jsonObject.get("error").toString();
                Log.d("RESULT", " " +error);
                if (error.equals("false"))
                {
                   Iterator keys = jsonObject.keys();
                    JSONObject currentDynamicValue;
                    int i=0;
                    while (keys.hasNext()) {
                        // loop to get the dynamic key
                        String currentDynamicKey = (String) keys.next();
                         if (!currentDynamicKey.equals("error")) {
                        // get the value of the dynamic key
                        currentDynamicValue = jsonObject.getJSONObject(currentDynamicKey);
                        list.put(i, currentDynamicValue.get("command_id").toString());
                        i++;
                        final String command_id = currentDynamicValue.get("command_id").toString();
                        if(command_id.equals("0"))
                        {
                           button1.setVisibility(View.VISIBLE);


                        }
                        else{
                            Toast.makeText(getApplicationContext(), "Command not Found..!" , Toast.LENGTH_SHORT).show();
                        }

                    }
                    }

View.Visible在棉花糖中工作正常，但没有在Kikat上工作

4 个答案: