Question

我正在创建一个Youtube Player应用。我不明白如何在动态多个按钮中分配JSON对象值。我正在通过JSON提取数据，并将数据转换为JSON数组。我希望通过JSON对象分配Button背景图片，URL视频以及按钮名称，请帮助我???

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    parent=(LinearLayout)findViewById(R.id.ll_parent);
    BackgroundTask process = new BackgroundTask();
    process.execute();
}
class BackgroundTask extends AsyncTask<Void, Void, String> {
    String data = "";

    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
    @Override
    protected String doInBackground(Void... voids) {
        try {
            URL url = new 
            URL("https://manisheikh.com/hamza/Json_get_Button_Data.php");
            HttpsURLConnection httpsURLConnection = (HttpsURLConnection) 
            url.openConnection();
            InputStream inputStream = httpsURLConnection.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new 
            InputStreamReader(inputStream));
            String line = "";
            while ((line != null)) {
                line = bufferedReader.readLine();
                data = data + line;
            }

            JSONArray JA=new JSONArray(data);
            for(int i=0;i<JA.length();i++)
            {
                JSONObject JO=(JSONObject) JA.get(i);
                b1=new Button(MainActivity.this);
                b1.setId(i+1);
                b1.setText((CharSequence) JO.get("btn_name"));
                b1.setTag(i);
            }

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        }
        return null;
    }


    @Override
    protected void onPostExecute(String result) {
        parent.addView(b1);
        return;
    }
}

Answer 1

尝试

    for(int i = 0; i < JA.length(); i++)
{
    Button btn = new Button(this);
    btn.setId(2000+i);
    btn.setText(JA.get(i) + i));
    btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(view v) {
            // TODO Whatever you want onclick to do
        }
    });
    //Log stuff
    linearButton.addView(btn, new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
}

注意：-不要忘记最后添加视图

JSON对象值动态分配给多个按钮

1 个答案: