我有一個標記爲圖書館的項目和一個使用該圖書館的項目。 它看起來像一切都很好,主要項目的清單具有洞名稱(package.name)庫的活動,但我不知道如何調用庫類我導入mainactivity(import com.example .libreriasuscripcion.MainActivity;)從庫到主,當我這樣稱呼它:對圖書館項目的參考
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Log.d("Juego - onCreate", "en Onclick");
Intent i = new Intent(getBaseContext(), MainActivity.class);
startActivity(i);
}
有一個錯誤:這是logcat的
03-21 09:45:00.534: E/AndroidRuntime(413): FATAL EXCEPTION: main
03-21 09:45:00.534: E/AndroidRuntime(413): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.juego/com.example.libreriasuscripcion.MainActivity}: java.lang.InstantiationException: com.example.libreriasuscripcion.MainActivity
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.os.Handler.dispatchMessage(Handler.java:99)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.os.Looper.loop(Looper.java:123)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread.main(ActivityThread.java:4627)
03-21 09:45:00.534: E/AndroidRuntime(413): at java.lang.reflect.Method.invokeNative(Native Method)
03-21 09:45:00.534: E/AndroidRuntime(413): at java.lang.reflect.Method.invoke(Method.java:521)
03-21 09:45:00.534: E/AndroidRuntime(413): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-21 09:45:00.534: E/AndroidRuntime(413): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-21 09:45:00.534: E/AndroidRuntime(413): at dalvik.system.NativeStart.main(Native Method)
03-21 09:45:00.534: E/AndroidRuntime(413): Caused by: java.lang.InstantiationException: com.example.libreriasuscripcion.MainActivity
03-21 09:45:00.534: E/AndroidRuntime(413): at java.lang.Class.newInstanceImpl(Native Method)
03-21 09:45:00.534: E/AndroidRuntime(413): at java.lang.Class.newInstance(Class.java:1429)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
03-21 09:45:00.534: E/AndroidRuntime(413): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
03-21 09:45:00.534: E/AndroidRuntime(413): ... 11 more
你能幫我嗎?在此先感謝
感謝羅賓,I'm使用Eclipse本地
謝謝大家。如果我去property-> java構建路徑 - >庫我的file.jar是在Android的依賴。導出包含庫的apk是在完成之前的las步驟,現在我仍然在學習如何使用庫 – Ivan 2013-03-21 11:35:55