これは、JSON を使用して MYSQL からデータを JSONArray に取得しようとするクラスです。
画面に 2 つのトーストが表示されます。NullPointerEception と、php webpage にあるすべてのものを単語ごとに書き込む別の例外です。
public class ConnectMySql extends Activity{
InputStream is;
//List<String> items;
JSONArray jArray;
//String[] items;
StringBuilder sb;
//ListView list;
TextView textv;
String result;
//List<NameValuePair> items;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
//list = (ListView) findViewById(R.id.listview);
textv = (TextView) findViewById(R.id.tvHI);
setContentView(R.layout.main);
try{
HttpClient httpsClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost("http://79.114.48.119/data.php");
List<NameValuePair> nameValue = new ArrayList<NameValuePair>();
httpPost.setEntity(new UrlEncodedFormEntity(nameValue));
HttpResponse httpResponse = httpsClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}catch(Exception e){
Log.e("log_tag", "Error in HTTP connection" + e.toString());
Toast.makeText(this, "http connection error: " + e.toString(), Toast.LENGTH_LONG).show();
}
try{
BufferedReader BufR = new BufferedReader (new InputStreamReader(is, "iso-8859-1"),8);
sb = new StringBuilder();
sb.append(BufR.readLine() + "\n");
String line = "0";
while((line = BufR.readLine()) != null){
sb.append(line + "\n");
}
is.close();
result = sb.toString();
}catch(Exception e){
Log.e("log_tag", "Error in convert String" + e.toString());
}
int lat;
int lon;
try{
jArray = new JSONArray(result);
Toast.makeText(this, "no data found" + result, Toast.LENGTH_LONG).show();
JSONObject json_data = null;
for(int i = 0; i< jArray.length(); i++){
json_data = jArray.getJSONObject(i);
lat = json_data.getInt("latitude");
lon = json_data.getInt("longitude");
textv.setText(lat + lon);
//Here i use another function whitch uses lat & lon
}
//setupList();
}catch(JSONException e){
Toast.makeText(this, "no data found", Toast.LENGTH_LONG).show();
}catch(Exception e){
Toast.makeText(this, "error" + e.toString(), Toast.LENGTH_LONG).show();
}
}
}
/*private void setupList() {
// TODO Auto-generated method stub
list.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, items));
}
}*/
私たちを手伝ってくれますか ?どうもありがとうございました !