책 봤을때 느낌은 왔는데 막상 짤려니까 전혀 모르겠네요 ㅋㅋ;
원인이 뭔지 잘 모르겠어요 ㅠㅠ
일단 소스 올립니다.
MainActivity.java
package com.example.xmlparser;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.ListView;
public class MainActivity extends Activity {
private static AppListAdapter mAdapter;
private ArrayAdapter appList;
private ArrayList<AppInfo> mListData;
private ListView mListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PackageManager pm = this.getPackageManager();
mListData =new ArrayList<AppInfo>();
mAdapter = new AppListAdapter(this, R.layout.list_row_ad, mListData);
// 설치된 어플리케이션 리스트 취득
List<ApplicationInfo> packs = pm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES | PackageManager.GET_DISABLED_COMPONENTS);
AppInfo info = null;
for (ApplicationInfo app : packs) {
info = new AppInfo();
// App Icon
info.mIcon = app.loadIcon(pm);
// App Name
info.mAppName = app.loadLabel(pm).toString();
// App Package Name
info.mAppPackage = app.packageName;
mListData.add(info);
}
mListView.setAdapter(mAdapter);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
로그캣
08-10 04:35:25.750: E/AndroidRuntime(25326): FATAL EXCEPTION: main
08-10 04:35:25.750: E/AndroidRuntime(25326): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.xmlparser/com.example.xmlparser.MainActivity}: java.lang.NullPointerException
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread.access$700(ActivityThread.java:140)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.os.Handler.dispatchMessage(Handler.java:99)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.os.Looper.loop(Looper.java:137)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread.main(ActivityThread.java:4946)
08-10 04:35:25.750: E/AndroidRuntime(25326): at java.lang.reflect.Method.invokeNative(Native Method)
08-10 04:35:25.750: E/AndroidRuntime(25326): at java.lang.reflect.Method.invoke(Method.java:511)
08-10 04:35:25.750: E/AndroidRuntime(25326): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036)
08-10 04:35:25.750: E/AndroidRuntime(25326): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
08-10 04:35:25.750: E/AndroidRuntime(25326): at dalvik.system.NativeStart.main(Native Method)
08-10 04:35:25.750: E/AndroidRuntime(25326): Caused by: java.lang.NullPointerException
08-10 04:35:25.750: E/AndroidRuntime(25326): at com.example.xmlparser.MainActivity.onCreate(MainActivity.java:45)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.Activity.performCreate(Activity.java:5206)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-10 04:35:25.750: E/AndroidRuntime(25326): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
08-10 04:35:25.750: E/AndroidRuntime(25326): ... 11 more
