08-20 17:19:32.790: D/dalvikvm(938): GC_EXTERNAL_ALLOC freed 52K, 51% free 2686K/5379K, external 0K/0K, paused 397ms
08-20 17:19:33.200: D/AndroidRuntime(938): Shutting down VM
08-20 17:19:33.200: W/dalvikvm(938): threadid=1: thread exiting with uncaught exception (group=0x40020560)
08-20 17:19:33.210: E/AndroidRuntime(938): FATAL EXCEPTION: main
08-20 17:19:33.210: E/AndroidRuntime(938): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.suishoukan/com.example.suishoukan.MainActivity}: java.lang.NullPointerException
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1834)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1850)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread.access$1500(ActivityThread.java:125)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:941)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.os.Handler.dispatchMessage(Handler.java:99)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.os.Looper.loop(Looper.java:130)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread.main(ActivityThread.java:3962)
08-20 17:19:33.210: E/AndroidRuntime(938): at java.lang.reflect.Method.invokeNative(Native Method)
08-20 17:19:33.210: E/AndroidRuntime(938): at java.lang.reflect.Method.invoke(Method.java:507)
08-20 17:19:33.210: E/AndroidRuntime(938): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
08-20 17:19:33.210: E/AndroidRuntime(938): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
08-20 17:19:33.210: E/AndroidRuntime(938): at dalvik.system.NativeStart.main(Native Method)
08-20 17:19:33.210: E/AndroidRuntime(938): Caused by: java.lang.NullPointerException
08-20 17:19:33.210: E/AndroidRuntime(938): at com.example.suishoukan.MainActivity.show(MainActivity.java:85)
08-20 17:19:33.210: E/AndroidRuntime(938): at com.example.suishoukan.MainActivity.onCreate(MainActivity.java:54)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-20 17:19:33.210: E/AndroidRuntime(938): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1788)
08-20 17:19:33.210: E/AndroidRuntime(938): ... 11 more
- Java code
package com.example.suishoukan;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import com.example.domain.Film;import com.example.service.FilmService;import com.example.test.FilmServiceTest;import android.app.TabActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.TabHost;import android.widget.TabHost.OnTabChangeListener;public class MainActivity extends TabActivity{ //声明TabHost对象 TabHost mTabHost; Button button1,button2,button3,button4; FilmService filmService; List<Film> films; ListView listView; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //取得TabHost对象 mTabHost = getTabHost(); /* 为TabHost添加标签 */ //新建一个newTabSpec(newTabSpec) //设置其标签和图标(setIndicator) //设置内容(setContent) mTabHost.addTab(mTabHost.newTabSpec("tab_test1") .setIndicator("榜单") .setContent(R.id.textview1)); mTabHost.addTab(mTabHost.newTabSpec("tab_test2") .setIndicator("节目表") .setContent(R.id.textview2)); mTabHost.addTab(mTabHost.newTabSpec("tab_test3") .setIndicator("收藏") .setContent(R.id.textview3)); //设置当前显示哪一个标签 mTabHost.setCurrentTab(0); filmService = new FilmService(this); films = filmService.getScrollData(0,10); listView = (ListView) this.findViewById(R.id.listView) ; button1 = (Button) this.findViewById(R.id.button1); button2 = (Button) this.findViewById(R.id.button2); button3 = (Button) this.findViewById(R.id.button3); button4 = (Button) this.findViewById(R.id.button4); OnClickListener o = new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if(button1.getId()==v.getId()){ films = filmService.getScrollData(0,10); } else if(button2.getId()==v.getId()){ films = filmService.getScrollData(10,10); } else if(button3.getId()==v.getId()){ films = filmService.getScrollData(20,10); } else{ films = filmService.getScrollData(30,10); } } }; button1.setOnClickListener(o); button2.setOnClickListener(o); button3.setOnClickListener(o); button4.setOnClickListener(o); show(); } private void show() { // TODO Auto-generated method stub List<HashMap<String, Object>> data = new ArrayList<HashMap<String,Object>>(); for(Film film : films){ HashMap<String,Object> item = new HashMap<String,Object>(); item.put("title", film.getTitle()); item.put("score", film.getScore()); data.add(item); } SimpleAdapter adapter = new SimpleAdapter(this, data, R.layout.item, new String[]{"title","score"}, new int[]{R.id.title,R.id.score}); listView.setAdapter(adapter); }}