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我想運行一個類，它將檢查數據庫中的信息，然後將其顯示在屏幕上。這是工作昨天，直到我在代碼中增加了它的第二個表查資料，我將發佈兩個密碼和logcat的，因爲我不知道爲什麼會這樣Android類不工作
public class WorkoutProgress extends ListActivity {
private DataBaseHelper datasource;
@Override
public void onCreate(Bundle savedInstanceState) {
/*requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);*/
super.onCreate(savedInstanceState);
setContentView(R.layout.progress);
datasource = new DataBaseHelper(this);
datasource.open();
fillData();
datasource.close();
}
private void fillData() {
// Get all of the notes from the database and create the item list
Cursor c = datasource.getAllTitles();
startManagingCursor(c);
String[] from = new String[] {DataBaseHelper.KEY_CODE, DataBaseHelper.KEY_DAYS,DataBaseHelper.KEY_BMI };
int[] to = { R.id.code, R.id.Days, R.id.BMI };
String[] from2 = new String[] {DataBaseHelper.KEY_DATE, DataBaseHelper.KEY_STEPS,DataBaseHelper.KEY_CALs };
int[] to2 = { R.id.date, R.id.steps, R.id.cals };
// Now create an array adapter and set it to display using our row
SimpleCursorAdapter notes =
new SimpleCursorAdapter(this, R.layout.notes_row, c, from, to);
setListAdapter(notes);
SimpleCursorAdapter notes2 =
new SimpleCursorAdapter(this, R.layout.notes_row, c, from2, to2);
setListAdapter(notes);
}
public void add(View view) {
//Do nothing
}
public void delete(View view) {
datasource.open();
datasource.deleteFirst();
fillData();
datasource.close();
}
}
和日誌貓當我嘗試訪問這個類是
04-06 01:10:42.293: E/global(22219): java.lang.UnsupportedOperationException
04-06 01:10:42.293: E/global(22219): at java.lang.VMThread.stop(VMThread.java:85)
04-06 01:10:42.293: E/global(22219): at java.lang.Thread.stop(Thread.java:1391)
04-06 01:10:42.293: E/global(22219): at java.lang.Thread.stop(Thread.java:1356)
04-06 01:10:42.293: E/global(22219): at com.b00348312.workout.Splashscreen$1.run(Splashscreen.java:42)
04-06 01:10:45.393: I/Database(22219): sqlite returned: error code = 1, msg = AUTOINCREMENT is only allowed on an INTEGER PRIMARY KEY
04-06 01:10:45.393: E/Database(22219): Failure 1 (AUTOINCREMENT is only allowed on an INTEGER PRIMARY KEY) on 0x2c0e38 when preparing 'create table goals (_id primary key autoincrement, code text not null,days title text not null, bmi text not null);'.
04-06 01:10:45.403: D/AndroidRuntime(22219): Shutting down VM
04-06 01:10:45.403: W/dalvikvm(22219): threadid=1: thread exiting with uncaught exception (group=0x400259f8)
04-06 01:10:45.453: D/dalvikvm(22219): GC_FOR_MALLOC freed 4012 objects/253248 bytes in 32ms
04-06 01:10:45.453: E/AndroidRuntime(22219): FATAL EXCEPTION: main
04-06 01:10:45.453: E/AndroidRuntime(22219): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.b00348312.workout/com.b00348312.workout.WorkoutProgress}: android.database.sqlite.SQLiteException: AUTOINCREMENT is only allowed on an INTEGER PRIMARY KEY: create table goals (_id primary key autoincrement, code text not null,days title text not null, bmi text not null);
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2787)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2803)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread.access$2300(ActivityThread.java:135)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2136)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.os.Handler.dispatchMessage(Handler.java:99)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.os.Looper.loop(Looper.java:144)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread.main(ActivityThread.java:4937)
04-06 01:10:45.453: E/AndroidRuntime(22219): at java.lang.reflect.Method.invokeNative(Native Method)
04-06 01:10:45.453: E/AndroidRuntime(22219): at java.lang.reflect.Method.invoke(Method.java:521)
04-06 01:10:45.453: E/AndroidRuntime(22219): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
04-06 01:10:45.453: E/AndroidRuntime(22219): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-06 01:10:45.453: E/AndroidRuntime(22219): at dalvik.system.NativeStart.main(Native Method)
04-06 01:10:45.453: E/AndroidRuntime(22219): Caused by: android.database.sqlite.SQLiteException: AUTOINCREMENT is only allowed on an INTEGER PRIMARY KEY: create table goals (_id primary key autoincrement, code text not null,days title text not null, bmi text not null);
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.database.sqlite.SQLiteDatabase.native_execSQL(Native Method)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1817)
04-06 01:10:45.453: E/AndroidRuntime(22219): at com.b00348312.workout.DataBaseHelper$DatabaseHelper.onCreate(DataBaseHelper.java:59)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:106)
04-06 01:10:45.453: E/AndroidRuntime(22219): at com.b00348312.workout.DataBaseHelper.open(DataBaseHelper.java:78)
04-06 01:10:45.453: E/AndroidRuntime(22219): at com.b00348312.workout.WorkoutProgress.onCreate(WorkoutProgress.java:21)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1069)
04-06 01:10:45.453: E/AndroidRuntime(22219): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2751)
04-06 01:10:45.453: E/AndroidRuntime(22219): ... 11 more
+1。我真的希望新的程序員能夠學會實際閱讀**錯誤信息，而不僅僅是「我的代碼不工作，這是錯誤信息，怎麼了？這個真的很清楚。 – 2012-04-06 00:36:18
@ Ken white，很抱歉，我還不熟悉logcat。我只是真的開始使用它，我不知道我應該尋找哪些錯誤。現在實施這些改變後，我仍然有一個問題，但它的說法是，當我已經明確地定義它時， – 2012-04-06 00:56:59