我下面一起開始的Android遊戲書,並在第6章(對於那些熟悉的書)結束時,我莫名其妙地搞砸了清單文件,我就得到一個java.lang.NullPointerException
主要活動課。有麻煩的Android清單配置
遊戲包含三個包:
- com.badlogic.androidgames.framework
- com.badlogic.androidgames.framework.impl
com.badlogic.androidgames.framework.mrnom
<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="19" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission> <uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".MrNomGame" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
類MrNomGame
位於com.badlogic.androidgames.mrnom包中。如果它不是很明顯,我對android開發極其陌生,我無法圍繞java和android(manifest)如何辨別文件位置,以及大約80億個其他問題。
謝謝。
編輯:主要活動和logcat的輸出:
package com.badlogic.androidgames.mrnom;
import com.badlogic.androidgames.framework.Screen;
import com.badlogic.androidgames.framework.impl.AndroidGame;
public class MrNomGame extends AndroidGame {
public Screen getStartScreen() {
return new LoadingScreen(this);
}
}
按羅比池的建議,我更新清單android:name:
到android:name=".mrnom.MrNomGame"
這是變更後的logcat的輸出。
02-27 10:01:21.039: D/AndroidRuntime(1261): Shutting down VM
02-27 10:01:21.039: W/dalvikvm(1261): threadid=1: thread exiting with uncaught exception (group=0xb3affba8)
02-27 10:01:21.129: E/AndroidRuntime(1261): FATAL EXCEPTION: main
02-27 10:01:21.129: E/AndroidRuntime(1261): Process: com.badlogic.androidgames.mrnom, PID: 1261
02-27 10:01:21.129: E/AndroidRuntime(1261): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.badlogic.androidgames.mrnom/com.badlogic.androidgames.mrnom.MrNomGame}: java.lang.NullPointerException
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread.access$800(ActivityThread.java:135)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.os.Handler.dispatchMessage(Handler.java:102)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.os.Looper.loop(Looper.java:136)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread.main(ActivityThread.java:5017)
02-27 10:01:21.129: E/AndroidRuntime(1261): at java.lang.reflect.Method.invokeNative(Native Method)
02-27 10:01:21.129: E/AndroidRuntime(1261): at java.lang.reflect.Method.invoke(Method.java:515)
02-27 10:01:21.129: E/AndroidRuntime(1261): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
02-27 10:01:21.129: E/AndroidRuntime(1261): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
02-27 10:01:21.129: E/AndroidRuntime(1261): at dalvik.system.NativeStart.main(Native Method)
02-27 10:01:21.129: E/AndroidRuntime(1261): Caused by: java.lang.NullPointerException
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.graphics.Canvas.<init>(Canvas.java:136)
02-27 10:01:21.129: E/AndroidRuntime(1261): at com.badlogic.androidgames.framework.impl.AndroidGraphics.<init>(AndroidGraphics.java:30)
02-27 10:01:21.129: E/AndroidRuntime(1261): at com.badlogic.androidgames.framework.impl.AndroidGame.onCreate(AndroidGame.java:44)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.Activity.performCreate(Activity.java:5231)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
02-27 10:01:21.129: E/AndroidRuntime(1261): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
02-27 10:01:21.129: E/AndroidRuntime(1261): ... 11 more
02-27 10:06:21.749: I/Process(1261): Sending signal. PID: 1261 SIG: 9
請提供完整的清單,特別是其中的例外隨着logcat的輸出發生的所有活動 –
你從清單削減重要組成部分.. – donfuxx
對不起球員,我禁止複製> pasted-> CTRL + K,它被切斷了。現在修復了 – SuperNoob