我创建了一个程序,当在编辑文本空间中键入名字时,它会显示我创建的数据库(MySQL)中具有该名字的人的信息。但是,当我输入Eric并按下D-pad时,除了文本被删除(或重置)之外没有任何反应。我该怎么做才能解决它?
public class PS extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//get the two controls we created earlier, also with the resource reference and the id
final EditText et_Text = (EditText)findViewById(R.id.et_Text);
//add new KeyListener Callback (to record key input)
et_Text.setOnKeyListener(new OnKeyListener()
{
//function to invoke when a key is pressed
public boolean onKey(View v, int keyCode, KeyEvent event)
{
//check if there is
if (event.getAction() == KeyEvent.ACTION_DOWN)
{
//check if the right key was pressed
if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
{
InputStream is = null;
String result = "";
//the name data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("name",et_Text.getText().toString()));
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://*******/sampleDB/testSend.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
result=sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error converting result "+e.toString());
}
//parse json data
try{
JSONArray jArray = new JSONArray(result);
for(int i=0;i<jArray.length();i++){
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag","PersonID: "+json_data.getInt("personID")+
", FirstName: "+json_data.getString("FirstName")+
", LastName: "+json_data.getString("LastName")+
", Age: "+json_data.getInt("Age")
);
}
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
};
et_Text.setText("");
//and clear the EditText control
return true;
}
}
return false;
}
});
}
}
这就是我在Log Cat中得到的: “09-06 21:03:16.375:ERROR / log_tag(22920):解析数据时出错org.json.JSONException:Value
答案 0 :(得分:0)
日志中发生了什么?是否有任何异常被提出?您正在清除行
中的EditText et_Text.setText("");
这样可以说明为什么要重置/清除