我有一个Android应用程序,写的包含,除其他事项外的java,旋,在layout.xml如下:Android应用微调曹景伟应用程序崩溃,当点击了
<Spinner
android:id="@+id/sprDeviceType"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
它被初始化在活动类,如下所示:
public class AddDevice extends Activity
{
private Spinner deviceTypeSpinner;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.add); //Set the layout
populateDeviceTypeSpinner();
}
private void populateDeviceTypeSpinner()
{
String device_type_spinner[];
device_type_spinner = new String[2];
device_type_spinner[0] = "FTP";
device_type_spinner[1] = "QAF";
deviceTypeSpinner = (Spinner) findViewById(R.id.sprDeviceType);
ArrayAdapter deviceTypeArrayAdapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, device_type_spinner);
deviceTypeSpinner.setAdapter(deviceTypeArrayAdapter);
}
}
然而,当我运行程序,它会打开的活动很好,但是当我点击微调,以获得下拉项目,它崩溃的计划,抛出一个NullPointerException异常。
有人看到我在做什么错了吗?
的logcat的显示:
08-14 14:57:02.034: D/AndroidRuntime(1612): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<<
08-14 14:57:02.034: D/AndroidRuntime(1612): CheckJNI is OFF
08-14 14:57:02.074: D/AndroidRuntime(1612): --- registering native functions ---
08-14 14:57:05.004: D/AndroidRuntime(1612): Shutting down VM
08-14 14:57:05.014: I/AndroidRuntime(1612): NOTE: attach of thread 'Binder Thread #3' failed
08-14 14:57:05.184: D/AndroidRuntime(1637): >>>>>>>>>>>>>> AndroidRuntime START <<<<<<<<<<<<<
08-14 14:57:05.184: D/AndroidRuntime(1637): CheckJNI is OFF
08-14 14:57:05.224: D/AndroidRuntime(1637): --- registering native functions ---
08-14 14:57:05.524: D/AndroidRuntime(1637): Shutting down VM
08-14 14:57:05.544: I/AndroidRuntime(1637): NOTE: attach of thread 'Binder Thread #3' failed
发表您的logcat – MAC 2012-08-14 13:56:06
发布,但它看起来并不非常有帮助@ gtumca-MAC – 2012-08-14 14:01:20
我不找你logcat的PLZ后空指针相关的logcat – MAC 2012-08-14 14:04:18