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我創建了一個活動與一個不可見的TabHost，它從我的數據庫填充ListActivity獲取的內容。 如果我打開我的活動與其中的TabHost，我收到強制關閉錯誤。問題可能在我的ListActivity中。如果TabHost訪問ListActivity - >空指針異常
這裏是我的活動與Tabhost的代碼：現在，這裏
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" />
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignBottom = "@android:id/tabcontent"
android:visibility="invisible"/>
<TableRow
android:layout_height="wrap_content"
android:id="@+id/ADFilterOverview"
android:layout_width="match_parent"
android:onClick="onClickADConfig"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true">
<TextView
android:layout_gravity="bottom|left"
android:text="@string/newadfilter"
style="@style/NormalFont"/>
</TableRow>
</RelativeLayout>
</TabHost>
</FrameLayout>
你看我ListActivity的代碼：
package de.retowaelchli.filterit;
import de.retowaelchli.filterit.stats.CreatedADFilters;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.TabHost;
public class ADeleteActivity extends TabActivity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.autodelete_test);
TabHost tabHost = getTabHost();
tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("All AutodeleteFilters").setContent(new Intent(this, CreatedADFilters.class)));
tabHost.setCurrentTab(0);
}
/** Verweise auf die anderen Seiten **/
public void onClickADConfig(View view){
final Intent i = new Intent(this, ADFilterConfigActivity.class);
startActivity(i); }
}
下面是它的佈局，文件
package de.retowaelchli.filterit.stats;
import de.retowaelchli.filterit.R;
import de.retowaelchli.filterit.database.ADFilterDBAdapter;
import android.app.ListActivity;
import android.database.Cursor;
import android.os.Bundle;
import android.widget.SimpleCursorAdapter;
public class CreatedADFilters extends ListActivity {
//Variablen deklaration
private ADFilterDBAdapter mDbHelper;
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
mDbHelper=new ADFilterDBAdapter(this);
fillData();
}
private void fillData() {
// Get all of the notes from the database and create the item list
Cursor c = mDbHelper.getAllADFilter();
startManagingCursor(c);
String[] from = new String[] { mDbHelper.NAME };
int[] to = new int[] { R.id.empty };
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter adname =
new SimpleCursorAdapter(this, R.layout.list_layout, c, from, to);
setListAdapter(adname);
}
}
這裏是它的佈局文件：
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/NormalFont"
android:id="@+id/empty" >
</TextView>
所以我在做什麼錯.. :(
預先感謝您。
問候
野生動物園
這裏的logcat的。
09-13 14:20:11.652: INFO/ActivityManager(1721): Starting activity: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10100000 cmp=de.retowaelchli.filterit/.StartseiteActivity } from pid 1721
09-13 14:20:11.672: VERBOSE/HtcAppUsageStats(1721): (launch app, package): (Filter It, de.retowaelchli.filterit)
09-13 14:20:11.672: DEBUG/StatusBarManagerService(1721): disable what =0, token = [email protected], pkg = android, mBar = [email protected]
09-13 14:20:11.672: INFO/ActivityManager(1721): Start proc de.retowaelchli.filterit for activity de.retowaelchli.filterit/.StartseiteActivity: pid=3992 uid=10150 gids={}
09-13 14:20:11.812: INFO/SuperPowerSvc(29815): [SuperPowerSvc] App launched: [de.retowaelchli.filterit]
09-13 14:20:12.002: DEBUG/dalvikvm(1721): GC_EXTERNAL_ALLOC freed 1394K, 34% free 10500K/15815K, external 10208K/12256K, paused 147ms
09-13 14:20:12.232: WARN/ResourceType(1721): Skipping entry 0x7f040007 in package table 0 because it is not complex!
09-13 14:20:12.232: WARN/ResourceType(1721): Skipping entry 0x7f040008 in package table 0 because it is not complex!
09-13 14:20:12.272: DEBUG/SurfaceFlinger(1721): layer=0xc46a48 is not in the purgatory list
09-13 14:20:12.292: DEBUG/dalvikvm(3992): GC_EXTERNAL_ALLOC freed 44K, 50% free 2695K/5379K, external 0K/0K, paused 25ms
09-13 14:20:12.442: WARN/InputManagerService(1721): [unbindCurrentClientLocked] Disable input method client.
09-13 14:20:12.442: WARN/InputManagerService(1721): [startInputLocked] Enable input method client.
09-13 14:20:12.512: INFO/ActivityManager(1721): Displayed de.retowaelchli.filterit/.StartseiteActivity: +837ms
09-13 14:20:13.472: INFO/ActivityManager(1721): Starting activity: Intent { cmp=de.retowaelchli.filterit/.ADeleteActivity } from pid 3992
09-13 14:20:13.502: INFO/SuperPowerSvc(29815): [SuperPowerSvc] App launched: [de.retowaelchli.filterit]
09-13 14:20:13.622: DEBUG/dalvikvm(3992): GC_EXTERNAL_ALLOC freed 36K, 49% free 2769K/5379K, external 5760K/7192K, paused 22ms
09-13 14:20:13.742: DEBUG/AndroidRuntime(3992): Shutting down VM
09-13 14:20:13.742: WARN/dalvikvm(3992): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): FATAL EXCEPTION: main
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): java.lang.RuntimeException: Unable to start activity ComponentInfo{de.retowaelchli.filterit/de.retowaelchli.filterit.ADeleteActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{de.retowaelchli.filterit/de.retowaelchli.filterit.stats.CreatedADFilters}: java.lang.NullPointerException
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1816)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1837)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.access$1500(ActivityThread.java:132)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1033)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.os.Handler.dispatchMessage(Handler.java:99)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.os.Looper.loop(Looper.java:143)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.main(ActivityThread.java:4196)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at java.lang.reflect.Method.invokeNative(Native Method)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at java.lang.reflect.Method.invoke(Method.java:507)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at dalvik.system.NativeStart.main(Native Method)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{de.retowaelchli.filterit/de.retowaelchli.filterit.stats.CreatedADFilters}: java.lang.NullPointerException
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1816)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1651)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:656)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.widget.TabHost.setCurrentTab(TabHost.java:326)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.widget.TabHost.addTab(TabHost.java:216)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at de.retowaelchli.filterit.ADeleteActivity.onCreate(ADeleteActivity.java:22)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1780)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): ... 11 more
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): Caused by: java.lang.NullPointerException
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at de.retowaelchli.filterit.database.ADFilterDBAdapter.getAllADFilter(ADFilterDBAdapter.java:108)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at de.retowaelchli.filterit.stats.CreatedADFilters.fillData(CreatedADFilters.java:26)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at de.retowaelchli.filterit.stats.CreatedADFilters.onCreate(CreatedADFilters.java:21)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1780)
09-13 14:20:13.742: ERROR/AndroidRuntime(3992): ... 20 more
09-13 14:20:13.752: WARN/ActivityManager(1721): Force finishing activity de.retowaelchli.filterit/.ADeleteActivity
09-13 14:20:13.752: WARN/ActivityManager(1721): Force finishing activity de.retowaelchli.filterit/.StartseiteActivity
09-13 14:20:14.262: WARN/ActivityManager(1721): Activity pause timeout for HistoryRecord{4058e8d8 de.retowaelchli.filterit/.ADeleteActivity}
09-13 14:20:14.352: WARN/ResourceType(1721): Skipping entry 0x7f040006 in package table 0 because it is not complex!
09-13 14:20:14.352: WARN/ResourceType(1721): Skipping entry 0x7f040005 in package table 0 because it is not complex!
POST是用新的Logcat和overdone代碼更新的，從您的發佈！
嘿Balaji，我做了兩個改變你說，但我仍然得到ForceClose錯誤！ :( – safari
粘貼你的logcat錯誤信息.. –
allready did。仍然NullPointerException某處 – safari