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활동을 작성하여 현재 수행중인 AlertDialog를 작성하여 작성 중입니다. 다음은 전체 코드, 매니페스트 및 오류 추적입니다. 누구든지 내가 만들고있는 오류를 말할 수 있습니까?활동 시작시 Java Nullpointer 예외
// From a service
Intent intent = new Intent(this, Myclass.class );
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("TYPE", "ASToContainer");
startActivity(intent);
// Activity
public class Myactivity extends Activity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
String type = savedInstanceState.getString("TYPE");
if(type.equalsIgnoreCase("ASToContainer"))
{
AlertDialog.Builder builder = new AlertDialog.Builder(Myactivity.this);
builder.setMessage(R.string.SWITCH_ACTIVESYNC_TO_WORKSPACE);
builder.setIcon(R.drawable.icon);
builder.setCancelable(false);
builder.setTitle(R.string.SWITCH_AS_CONFIRMATION);
builder.setPositiveButton(R.string.DIALOG_YES, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
AnotherService serviceInstance = AnotherService.getInstance();
if(serviceInstance != null)
{
serviceinstance._SwitchASToContainerRejected = 1;
serviceInstance.requestClearActiveSyncRegistration();
}
}
})
.setNegativeButton(R.string.DIALOG_NO, new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
AnotherService.getInstance()._SwitchASToContainerRejected = 0;
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
}
// Manifest
<android:name="mypackagename.activity.Myactivity" android:theme="@android:style/Theme.Dialog"></activity>
// trace
07-24 16:30:04.877: C/Myapp(619): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapp/com.example.myapp.IMC}: java.lang.NullPointerException
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-24 16:30:04.877: C/Myapp(619): at android.os.Handler.dispatchMessage(Handler.java:99)
07-24 16:30:04.877: C/Myapp(619): at android.os.Looper.loop(Looper.java:123)
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-24 16:30:04.877: C/Myapp(619): at java.lang.reflect.Method.invokeNative(Native Method)
07-24 16:30:04.877: C/Myapp(619): at java.lang.reflect.Method.invoke(Method.java:521)
07-24 16:30:04.877: C/Myapp(619): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-24 16:30:04.877: C/Myapp(619): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-24 16:30:04.877: C/Myapp(619): at dalvik.system.NativeStart.main(Native Method)
07-24 16:30:04.877: C/Myapp(619): Caused by: java.lang.NullPointerException
07-24 16:30:04.877: C/Myapp(619): at com.example.myapp.IMC.onCreate(IMC.java:57)
07-24 16:30:04.877: C/Myapp(619): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-24 16:30:04.877: C/Myapp(619): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
내가 뭘 잘못하고 있니? 이것이 Dialog 프롬프트를 만드는 올바른 방법입니까? 제발 도와주세요
발생 원인 : com.example.myapp.IMC.onCreate (java..java:57)의 java.lang.NullPointerException <- 문제가 있습니다. – panini
라인 57은 어느 것입니까? –
그리고 그것은'String type = getIntent.getStringExtra ("TYPE")'으로되어 있습니다. –