selectQType
一个简单的微调器。这些值将从数据库填充,它们很好。
ArrayAdapter<String> spinnerArrayAdapter1 =
new ArrayAdapter<String>(SpotlighterBasicActivity.this,
android.R.layout.simple_spinner_item, spinnerQTypeList);
spinnerArrayAdapter1.setDropDownViewResource( android.R.layout.simple_spinner_dropdown_item);
Spinner selectQType=(Spinner) findViewById(R.id.spinnerInputQType);
selectQType.setPrompt("QType");// logcat points warning on this line.
selectQType.setAdapter(spinnerArrayAdapter1);
selectQType.setSelection(QTypeIndex);
selectQType.setOnItemSelectedListener(new OnItemSelectedListener() {
...
}
这是我获得的平板电脑输出:
奇怪的是,它对于移动类别的模拟器和设备工作得非常好,但是对 tablet 类别的模拟器和设备发出警告。
以下是logcat详细信息:
05-18 16:47:29.284: E/SpotlighterBasicActivity(481): QTypeIndex=0
05-18 16:47:29.284: E/SpotlighterBasicActivity(481): spinnerArrayList[1]=Type 1, spinnerQTypeID=5853, defaultQType=6307
05-18 16:47:29.294: E/SpotlighterBasicActivity(481): spinnerArrayList[2]=Type 2, spinnerQTypeID=6308, defaultQType=6307
05-18 16:47:29.304: W/System.err(481): java.lang.NullPointerException
05-18 16:47:29.304: W/System.err(481): at in.varit.spotlighter.basic.SpotlighterBasicActivity.loadQTypeSpinners(SpotlighterBasicActivity.java:334)
05-18 16:47:29.304: W/System.err(481): at in.varit.spotlighter.basic.SpotlighterBasicActivity.onCreate(SpotlighterBasicActivity.java:203)
05-18 16:47:29.304: W/System.err(481): at android.app.Activity.performCreate(Activity.java:4397)
05-18 16:47:29.304: W/System.err(481): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
05-18 16:47:29.313: W/System.err(481): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1779)
05-18 16:47:29.313: W/System.err(481): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
05-18 16:47:29.313: W/System.err(481): at android.app.ActivityThread.access$500(ActivityThread.java:122)
05-18 16:47:29.313: W/System.err(481): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
05-18 16:47:29.325: W/System.err(481): at android.os.Handler.dispatchMessage(Handler.java:99)
05-18 16:47:29.325: W/System.err(481): at android.os.Looper.loop(Looper.java:132)
05-18 16:47:29.325: W/System.err(481): at android.app.ActivityThread.main(ActivityThread.java:4123)
05-18 16:47:29.325: W/System.err(481): at java.lang.reflect.Method.invokeNative(Native Method)
05-18 16:47:29.325: W/System.err(481): at java.lang.reflect.Method.invoke(Method.java:491)
05-18 16:47:29.334: W/System.err(481): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
05-18 16:47:29.334: W/System.err(481): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
05-18 16:47:29.334: W/System.err(481): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分:1)
selectQType is null
和
使用if(null!=selectQType)
并检查selectQType
的id是否正确于layout.xml?