java.lang.RuntimeException：無法啓動活動ComponentInfo？

我一直在試圖獲得一個android應用程序連接到位於本地主機上的數據庫，但到目前爲止我一直沒有運氣。我的程序曾經能夠啓動，我可以在文本字段中輸入文本，但是一旦我做了一些更改，它現在甚至不會啓動。我查看了LogCat，我不知道問題可能是什麼。我在這方面有點新鮮，認爲有人可以幫助我？java.lang.RuntimeException：無法啓動活動ComponentInfo？

這裏是我的錯誤日誌從logcat的：

08-08 20:31:35.367: E/AndroidRuntime(605): FATAL EXCEPTION: main 
08-08 20:31:35.367: E/AndroidRuntime(605): java.lang.RuntimeException: Unable to start activity  ComponentInfo{com.example.databasetester/com.example.databasetester.DashboardActivity}: android.database.sqlite.SQLiteException: no such table: users: , while compiling: SELECT * FROM users 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2049) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2083) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread.access$600(ActivityThread.java:134) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1233) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.os.Handler.dispatchMessage(Handler.java:99) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.os.Looper.loop(Looper.java:137) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread.main(ActivityThread.java:4697) 
08-08 20:31:35.367: E/AndroidRuntime(605): at java.lang.reflect.Method.invokeNative(Native Method) 
08-08 20:31:35.367: E/AndroidRuntime(605): at java.lang.reflect.Method.invoke(Method.java:511) 
08-08 20:31:35.367: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) 
08-08 20:31:35.367: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) 
08-08 20:31:35.367: E/AndroidRuntime(605): at dalvik.system.NativeStart.main(Native Method) 
08-08 20:31:35.367: E/AndroidRuntime(605): Caused by: android.database.sqlite.SQLiteException: no such table: users: , while compiling: SELECT * FROM users 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:143) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:361) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:127) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:94) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:53) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:47) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1671) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1645) 
08-08 20:31:35.367: E/AndroidRuntime(605): at library.DatabaseHandler.getRowCount(DatabaseHandler.java:103) 
08-08 20:31:35.367: E/AndroidRuntime(605): at library.UserFunctions.isUserLoggedIn(UserFunctions.java:71) 
08-08 20:31:35.367: E/AndroidRuntime(605): at com.example.databasetester.DashboardActivity.onCreate(DashboardActivity.java:24) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.Activity.performCreate(Activity.java:4539) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
08-08 20:31:35.367: E/AndroidRuntime(605): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2013) 
08-08 20:31:35.367: E/AndroidRuntime(605): ... 11 more

我還要補充一點，有一個在我的數據庫名爲「用戶」表。如果你們需要我展示我的一些代碼（我相信你會的），我會很高興。

來源

2012-08-08 user1585953

這裏的錯誤：

08-08 20:31:35.367: E/AndroidRuntime(605): FATAL EXCEPTION: main 
08-08 20:31:35.367: E/AndroidRuntime(605): java.lang.RuntimeException: 
    Unable to start activity 
    ComponentInfo{com.example.databasetester/com.example.databasetester.DashboardActivity}: 
    android.database.sqlite.SQLiteException: no such table: users: , 
    while compiling: SELECT * FROM users

幾點建議：

1）確保您做有一個表「用戶」（你說你做什麼，但請仔細檢查）

... AND ...

2）確保您正確指定數據庫文件：

* SQLite Exception: no such table Error

If you don't specify the database file name correctly I believe it falls back to creating an empty database. This is generally the cause of 'table not found'. Check your path and database file name.

來源

2012-08-08 21:16:34 paulsm4

java.lang.RuntimeException：無法啓動活動ComponentInfo？

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