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서버 (WAMP) 데이터베이스에서 데이터를 검색하고 단일 목록보기에 표시하고 싶습니다. 나는 이것에 대해 배우기까지 오랜 시간이 걸렸으나 logcat은 여러 가지 안드로이드 런타임 오류를 보여줍니다. 나는 약간의 오류를 고쳤고 나는 수정할 수없는 몇 가지 오류를 게시했다. 내 된 .java 파일 :android logcat의 런타임 예외
package com.example.least;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class MainActivity extends ListActivity {
// url to make request
private static String url = "http://localhost/android_connect/final.php";
// JSON Node names
private static final String TAG_CONTACTS = "opass";
private static final String TAG_ID = "User_ID";
// contacts JSONArray
JSONArray contacts = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of Contacts
contacts = json.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for(int i = 0; i < contacts.length(); i++){
JSONObject c = contacts.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_ID);
// Phone number is agin JSON Object
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_ID, id);
// adding HashList to ArrayList
contactList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(this, contactList,
R.layout.list_item,
new String[] { TAG_ID }, new int[] {
R.id.textView1});
setListAdapter(adapter);
// selecting single ListView item
ListView lv = getListView();
// Launching new screen on Selecting Single ListItem
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.textView1)).getText().toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
in.putExtra(TAG_ID, name);
startActivity(in);
}
});
}
}
로그 캣 예외 :
04-25 19:35:02.353: D/AndroidRuntime(5650): Shutting down VM
04-25 19:35:02.353: W/dalvikvm(5650): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
04-25 19:35:02.393: E/AndroidRuntime(5650): FATAL EXCEPTION: main
04-25 19:35:02.393: E/AndroidRuntime(5650): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.least/com.example.least.MainActivity}: android.os.NetworkOnMainThreadException
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.access$600(ActivityThread.java:141)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.Handler.dispatchMessage(Handler.java:99)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.Looper.loop(Looper.java:137)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.main(ActivityThread.java:5041)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.lang.reflect.Method.invokeNative(Native Method)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.lang.reflect.Method.invoke(Method.java:511)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
04-25 19:35:02.393: E/AndroidRuntime(5650): at dalvik.system.NativeStart.main(Native Method)
04-25 19:35:02.393: E/AndroidRuntime(5650): Caused by: android.os.NetworkOnMainThreadException
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
04-25 19:35:02.393: E/AndroidRuntime(5650): at java.net.InetAddress.getAllByName(InetAddress.java:214)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
04-25 19:35:02.393: E/AndroidRuntime(5650): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.example.least.JSONParser.getJSONFromUrl(JSONParser.java:39)
04-25 19:35:02.393: E/AndroidRuntime(5650): at com.example.least.MainActivity.onCreate(MainActivity.java:45)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.Activity.performCreate(Activity.java:5104)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
04-25 19:35:02.393: E/AndroidRuntime(5650): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
04-25 19:35:02.393: E/AndroidRuntime(5650): ... 11 more
04-25 19:35:02.603: D/dalvikvm(5650): GC_CONCURRENT freed 211K, 13% free 2588K/2944K, paused 24ms+30ms, total 226ms
홈페이지 Activity.xml 파일 :
<ListView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/list">
</ListView>
이 때문에 나는 오류의 이러한 유형 고민하고 안드로이드에 새로운 오전 수정을 도와주세요.
activity_main.xml 코드 – Shiv