Android - 从动态返回数组的数据库函数填充微调器

Question

我有一个database充满了某些值，我想知道我怎么能把它们放在spinner。我有一个名为SetSql的类，它包含我所有的数据库函数，并在其中包含一个名为getProfiles()的函数，它返回String Array。现在，我的页面上还有一个spinner，其ID为spinner1，我想知道如何从该getProfiles()函数中填充它？

另外我必须注意，数据库中的项目数目是未知的，并且范围从0到几乎任何事物。

谢谢！

---

我的努力

SetSql getprofiles = new SetSql(this); 
    getprofiles.open(); 
    if(getprofiles.getProfiles().length>0){ 
     spinnerArray = new String[100]; 
     spinnerArray = getprofiles.getProfiles(); 
    }else{ 
     spinnerArray = new String[1]; 
     spinnerArray[0] = "No Profiles, Please Create One"; 
    } 
    getprofiles.close(); 

    ArrayAdapter<String> array = new ArrayAdapter<String>(UserActivity.this, android.R.layout.simple_spinner_item, spinnerArray); 
    array.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
    profiles.setAdapter(array); 

我getProfiles（）

public String[] getProfiles() throws SQLException{ 
    String[] columns = new String[]{KEY_USER}; 
    Cursor c = ourDatabase.query(TABLE_USERS, columns, null, null, null, null, KEY_ROWID); 
    String[] result = new String[100]; 

    int iName = c.getColumnIndex(KEY_USER); 
    int count = 0; 
    for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 
     result[count] = c.getString(iName); 
     count++; 
    } 
    return result; 
} 

请记住，这个函数是一个类的一部分，所以有些瓦尔像KEY_Xs和我们的数据库不在这里。

logcat的

03-07 23:03:25.691: E/AndroidRuntime(10791): FATAL EXCEPTION: main 
03-07 23:03:25.691: E/AndroidRuntime(10791): java.lang.NullPointerException 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:355) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:192) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.View.measure(View.java:8313) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.View.measure(View.java:8313) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.View.measure(View.java:8313) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3138) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.View.measure(View.java:8313) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.ViewRoot.performTraversals(ViewRoot.java:839) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.os.Handler.dispatchMessage(Handler.java:99) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.os.Looper.loop(Looper.java:130) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at android.app.ActivityThread.main(ActivityThread.java:3683) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at java.lang.reflect.Method.invokeNative(Native Method) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at java.lang.reflect.Method.invoke(Method.java:507) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
03-07 23:03:25.691: E/AndroidRuntime(10791): at dalvik.system.NativeStart.main(Native Method) 

如果你有任何想法，为什么这应该崩溃，我很想听到：d

Answer 1

尝试是这样的：

String[] myArray = {"some","values"}; 

Spinner spin = (Spinner)findViewById(R.id.spinner1); 

ArrayAdapter<String> adapter = new ArrayAdapter(this,android.R.layout.simple_spinner_dropdown_item,myArray); 

spin.setAdapter(adapter); 

你也可以使用List代替String[]