Java Android与JSON的致命连接
我在尝试通过JSON连接到PHP文件以访问android中的MySQL时遇到问题。我一辈子都搞不明白为什么这会导致我的应用程序崩溃。有什么想法吗 它将抛出以下错误:Java Android与JSON的致命连接,java,php,android,mysql,json,Java,Php,Android,Mysql,Json,我在尝试通过JSON连接到PHP文件以访问android中的MySQL时遇到问题。我一辈子都搞不明白为什么这会导致我的应用程序崩溃。有什么想法吗 它将抛出以下错误: AndroidRuntime FATAL EXCEPTION: main 我正试图从我的主要活动中调用此选项: new getData().getMovie(); 这就叫: import java.io.BufferedReader; import java.io.InputStream; import java.io.Inpu
AndroidRuntime
FATAL EXCEPTION: main
我正试图从我的主要活动中调用此选项:
new getData().getMovie();
这就叫:
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import org.apache.http.*;
import org.json.*;
import android.util.Log;
import android.widget.Toast;
public class getData extends FullscreenActivity{
public void getMovie() {
String result = "";
String rID="1";
//the year data to send
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(new BasicNameValuePair("ids",rID));
//http post
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://website.com/myphp.php");
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
InputStream is = entity.getContent();
}catch(Exception e){
Toast.makeText(this, "Error in http connection "+e.toString(), Toast.LENGTH_LONG).show();
//Log.e("log_tag", "Error in http connection "+e.toString());
}
//convert response to string
try{
InputStream is = null;
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){
Toast.makeText(this, "Error converting result "+e.toString(), Toast.LENGTH_LONG).show();
//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","id: "+json_data.getString("id")+
", 1: "+json_data.getString("1")+
", 2: "+json_data.getString("2")+
", 3: "+json_data.getString("3")+
", 4: "+json_data.getString("4")+
", 5: "+json_data.getString("5")
);
}
} catch (JSONException e) {
Toast.makeText(this, "Error parsing data "+e.toString(), Toast.LENGTH_LONG).show();
//Log.e("log_tag", "Error parsing data "+e.toString());
}
}
}
导入java.io.BufferedReader;
导入java.io.InputStream;
导入java.io.InputStreamReader;
导入java.util.ArrayList;
导入org.apache.http.*;
导入org.json.*;
导入android.util.Log;
导入android.widget.Toast;
公共类getData扩展了FullscreenActivity{
公共电影{
字符串结果=”;
字符串rID=“1”;
//要发送的年度数据
ArrayList nameValuePairs=新的ArrayList();
添加(新的BasicNameValuePair(“ids”,rID));
//http post
试一试{
HttpClient HttpClient=新的DefaultHttpClient();
HttpPost HttpPost=新的HttpPost(“http://website.com/myphp.php");
setEntity(新的UrlEncodedFormEntity(nameValuePairs));
HttpResponse response=httpclient.execute(httppost);
HttpEntity=response.getEntity();
InputStream=entity.getContent();
}捕获(例外e){
Toast.makeText(这是“http连接中的错误”+e.toString(),Toast.LENGTH_LONG).show();
//e(“Log_标记”,“http连接错误”+e.toString());
}
//将响应转换为字符串
试一试{
InputStream=null;
BufferedReader reader=新的BufferedReader(新的InputStreamReader(is,“iso-8859-1”),8;
StringBuilder sb=新的StringBuilder();
字符串行=null;
而((line=reader.readLine())!=null){
sb.追加(第+行“\n”);
}
is.close();
结果=sb.toString();
}捕获(例外e){
Toast.makeText(这是“错误转换结果”+e.toString(),Toast.LENGTH_LONG.show();
//Log.e(“Log_标记”,“错误转换结果”+e.toString());
}
//解析json数据
试一试{
JSONArray jArray=新JSONArray(结果);
对于(int i=0;i首先,确保您的应用程序请求权限。更多信息。其次,您可以使用库显著地分离代码:
你能展示更完整的stacktrace吗?
public void getMovie() {
$.ajax(new AjaxOptions().url("http://website.com/myphp.php")
.type("POST")
.dataType("JSON")
.data("{ids: 1}")
.context(this)
.success(new Function() {
@Override
public void invoke($ droidQuery, Object... params) {
JSONArray json = (JSONArray) params[0];
Object[] datas = $.makeArray(json);
for (Object data : datas) {
JSONObject obj = (JSONObject) data;
Map<String, ?> map = $.map(obj);
Log.i("log_tag", map.toString());//will print all JSON Objects in a Key-Value format, such as "{1, 'text'}"
}
}
})
.error(new Function() {
@Override
public void invoke($ droidQuery, Object... params) {
String reason = (String) params[2];
droidQuery.toast("Error in Ajax Request: " + reason, Toast.LENGTH_LONG);
}
}));
}
try {
new getData().getMovie();
}
catch (Throwable t) {
t.printStackTrace();
}