Question

我想创建一个对话框，提示用户键入他/她的名字。它将首次捕获使用它的用户名，并在用户登录时显示用户名。

我完成了编码，但是发生了错误。我什么时候开始申请，有一个力量关闭错误。

logcat的：

01-25 01:03:24.023: E/AndroidRuntime(8242): FATAL EXCEPTION: main
01-25 01:03:24.023: E/AndroidRuntime(8242): android.app.SuperNotCalledException: Activity {com.example.fuellogproject/com.example.fuellogproject.homeActivity} did not call through to super.onCreate()
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2076)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.app.ActivityThread.access$700(ActivityThread.java:140)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.os.Looper.loop(Looper.java:137)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at android.app.ActivityThread.main(ActivityThread.java:4921)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at java.lang.reflect.Method.invokeNative(Native Method)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at java.lang.reflect.Method.invoke(Method.java:511)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
01-25 01:03:24.023: E/AndroidRuntime(8242):     at dalvik.system.NativeStart.main(Native Method)

homeactivity.java

public class homeActivity extends Activity{
    Button btnLogIn;
    Button btnAbout;
    SharedPreferences sp;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        final SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(this);
        String userName = prefs.getString("user_name", null);
        if (userName == null) {
            EditText input = new EditText(this);
            input.setId(1000);         




            AlertDialog dialog = new AlertDialog.Builder(this)
                    .setView(input).setTitle("Enter your username!")
                    .setPositiveButton("Ok",
                            new DialogInterface.OnClickListener() {

                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    EditText theInput = (EditText) ((AlertDialog) dialog)
                                            .findViewById(1000);
                                    String enteredText = theInput.getText()
                                            .toString();
                                    if (!enteredText.equals("")) {
                                        SharedPreferences.Editor editor = prefs
                                                .edit();
                                        editor.putString("user_name",
                                                enteredText);
                                        editor.commit();
                                    }
                                }
                            }).create();
            dialog.show();
        }
    }

}

Answer 1

你在onCreate（）方法中错过了 super.onCreate（） .. ....

有一个弹出对话框让用户键入用户名的问题

1 个答案: