Использование нескольких spinner (android)

Question

так что я действительно новый для мира android и im, пытаясь закодировать некоторые очень простые вещи. Я хотел бы знать, что код для отображения и сделать несколько операций spinner; до сих пор я сделал это, но я получаю сообщение об ошибке «Тип нового AdapterView.OnItemSelectedListener() {} должен реализовать унаследованный абстрактный метод AdapterView.OnItemSelectedListener.onNothingSelected (AdapterView)» Heres XML:.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:paddingBottom="@dimen/activity_vertical_margin" 
android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
tools:context="com.example.spinnertest.MainActivity" > 

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 

</TextView> 

<EditText 
    android:id="@+id/editText1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/spinner3" 
    android:layout_below="@+id/textView1" 
    android:layout_marginLeft="68dp" 
    android:ems="10" 
    android:inputType="number" > 

    <requestFocus /> 
</EditText> 

<Spinner 
    android:id="@+id/spinner2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_above="@+id/spinner3" 
    android:layout_toRightOf="@+id/editText1" 
    android:entries="@array/Type" /> 

<Spinner 
    android:id="@+id/spinner1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignBottom="@+id/editText1" 
    android:layout_alignParentLeft="true" 
    android:entries="@array/Produits" /> 

<EditText 
    android:id="@+id/editText2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_below="@+id/textView1" 
    android:ems="10" 
    android:inputType="number" /> 

<EditText 
    android:id="@+id/editText3" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_below="@+id/editText1" 
    android:layout_toLeftOf="@+id/editText2" 
    android:ems="10" 
    android:inputType="number" /> 

<EditText 
    android:id="@+id/editText4" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignParentRight="true" 
    android:layout_below="@+id/spinner2" 
    android:ems="10" 
    android:inputType="number" /> 

<Spinner 
    android:id="@+id/spinner3" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignRight="@+id/editText4" 
    android:layout_below="@+id/spinner4" /> 

<Spinner 
    android:id="@+id/spinner4" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_above="@+id/editText3" 
    android:layout_toRightOf="@+id/editText1" /> 

<TextView 
    android:id="@+id/textView2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/editText3" 
    android:layout_alignParentBottom="true" 
    android:layout_marginBottom="23dp" 
    android:text="TextView" /> 

<Spinner 
    android:id="@+id/spinner5" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignTop="@+id/editText4" 
    android:layout_toRightOf="@+id/button1" /> 

<Button 
    android:id="@+id/button1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_above="@+id/textView2" 
    android:layout_marginLeft="93dp" 
    android:layout_toRightOf="@+id/textView2" 
    android:text="Button" /> 

</RelativeLayout> 

и ява Heres код:

package com.example.spinnerTest; 


import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemSelectedListener; 
import android.widget.Spinner; 
import android.widget.TextView; 



public class MainActivity extends Activity { 


Spinner s1,s2; 
TextView txt; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

s1 = (Spinner) findViewById(R.id.spinner1); 
    txt = (TextView) findViewById(R.id.textView2); 

    s1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
     @Override 
     public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
      String val = s1.getSelectedItem().toString(); 
      txt.setText(val); 
     } 

     @Override 
     public void onNothingSelected(AdapterView<?> adapterView) { 

     } 
    }); 

    s2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
     @Override 
     public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
      String val = s2.getSelectedItem().toString(); 
      txt.setText(val); 
     } 

     @Override 
     public void onNothingSelected(AdapterView<?> adapterView) { 

     } 
    });}} 

Так им просто пытаюсь сделать 2 кок (и более после) для отображения и работает на том же time.I также получает эти ошибки при запуске его на сэмулированному:

10-12 15:39:19.388: E/Trace(831): error opening trace file: No such file or directory (2) 
10-12 15:39:20.269: D/AndroidRuntime(831): Shutting down VM 
10-12 15:39:20.269: W/dalvikvm(831): threadid=1: thread exiting with uncaught exception   (group=0x40a13300) 
10-12 15:39:20.279: E/AndroidRuntime(831): FATAL EXCEPTION: main 
10-12 15:39:20.279: E/AndroidRuntime(831): java.lang.RuntimeException: Unable to start activity  ComponentInfo{com.example.spinnertest/com.example.spinnertest.MainActivity}:  java.lang.NullPointerException 
10-12 15:39:20.279: E/AndroidRuntime(831): at  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.ActivityThread.access$600(ActivityThread.java:130) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.os.Looper.loop(Looper.java:137) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.ActivityThread.main(ActivityThread.java:4745) 
10-12 15:39:20.279: E/AndroidRuntime(831): at java.lang.reflect.Method.invokeNative(Native Method) 
10-12 15:39:20.279: E/AndroidRuntime(831): at java.lang.reflect.Method.invoke(Method.java:511) 
10-12 15:39:20.279: E/AndroidRuntime(831): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
10-12 15:39:20.279: E/AndroidRuntime(831): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
10-12 15:39:20.279: E/AndroidRuntime(831): at dalvik.system.NativeStart.main(Native Method) 
10-12 15:39:20.279: E/AndroidRuntime(831): Caused by: java.lang.NullPointerException 
10-12 15:39:20.279: E/AndroidRuntime(831): at com.example.spinnertest.MainActivity.onCreate(MainActivity.java:40) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.Activity.performCreate(Activity.java:5008) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079) 
10-12 15:39:20.279: E/AndroidRuntime(831): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023) 
10-12 15:39:20.279: E/AndroidRuntime(831): ... 11 more 

Спасибо!

Answer 1

Вам не нужны аннотации @Override над методами анонимных классов.

Также вам необходимо реализовать оба метода взаимодействия интерфейса.

s1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
    @Override 
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
     String val = s1.getSelectedItem().toString(); 
     txt.setText(val); 
    } 

    @Override 
    public void onNothingSelected(AdapterView<?> adapterView) { 

    } 
}); 

s2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
    @Override 
    public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { 
     String val = s2.getSelectedItem().toString(); 
     txt.setText(val); 
    } 

    @Override 
    public void onNothingSelected(AdapterView<?> adapterView) { 

    } 
});