java - 用 StringBuilder 附加一个逗号

Question

我遇到了一个小问题，我的代码可以运行并向我发送经度和纬度的输出。我只想用逗号和空格来分隔 TextView 中的值。我不需要行分隔符。

我得到的是:32.67543-55.986454

我想要的是:32.67543, -55.986454(逗号和空格)

有什么想法吗？

代码:

/**
 * After completing background task Dismiss the progress dialog
 * *
 */
protected void onPostExecute(JSONObject product) {
    if (product != null) {
        // product with this pid found
        // Edit Text
        lblDummyLocation = (TextView) findViewById(R.id.lblDummyLocation);

        StringBuilder jsonStringBuilder = new StringBuilder(); //Create StringBuilder for concatenation of JSON results

        // display profile data in EditText
        try {
            //txtMessage.setText(product.getString(TAG_FIRSTNAME));  //Don't set the text here
            jsonStringBuilder.append(product.getString(TAG_LATITUDE)); //Concatenate each separate item
            jsonStringBuilder.append(System.getProperty("line.separator"));
        } catch (JSONException e) {
            e.printStackTrace();
        }
        try {
            //txtMessage.setText(product.getString(TAG_LASTNAME));
            jsonStringBuilder.append(product.getString(TAG_LONGITUDE));
            //jsonStringBuilder.append(System.getProperty("line.separator"));
        } catch (JSONException e) {
            e.printStackTrace();
        }

        lblDummyLocation.setText(jsonStringBuilder.toString());
    }

    // dismiss the dialog once got all details
    pDialog.dismiss();
}

Answer 1

获取纬度后的 line.separator 会在其后换行，我认为你不需要那样。

要添加逗号，只需再执行一次追加即可。

失败时只需要一个 try/catch block 。

StringBuilder jsonStringBuilder = new StringBuilder(); 

// display profile data in EditText
try 
{
    jsonStringBuilder.append(product.getString(TAG_LATITUDE));
    jsonStringBuilder.append(", ");                                
    jsonStringBuilder.append(product.getString(TAG_LONGITUDE));
    lblDummyLocation.setText(jsonStringBuilder.toString());            
} 
catch (JSONException e) 
{
    e.printStackTrace(); // use a logger for this ideally
    lblDummyLocation.setText("Failed to get co-ordinates");            
}