Android View.getContext() при ошибке нулевого объекта при нажатии кнопки возврата

Question

В моем основном действии у меня есть счетчик, когда пользователь делает выбор на счетчике, он делает намерение и начинает активность2, но если пользователь пытается вернуться к основному действию приложения падает.

Основной класс:

public class MainActivity extends ActionBarActivity { 

private Spinner spinner; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    addItemsSpinner(); 
} 

public void addItemsSpinner(){ 
    spinner = (Spinner) findViewById(R.id.spinner1); 
    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { 
     @Override 
     public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
      for(int i = 1; i<=6; i++) { 
       if (position == i) { 
        Intent intent = new Intent(view.getContext().getApplicationContext(), Activity2.class); 
         view.getContext().startActivity(intent); 
        intent.putExtra("sel", spinner.getSelectedItem().toString()); 
        startActivity(intent); 
       } 
      } 
     } 

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

     } 
    }); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

деятельности2:

public class Activity2 extends ActionBarActivity { 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_activity2); 
    Intent getSel = getIntent(); 
     String selection = getSel.getExtras().getString("sel"); 
     final TextView textViewToChange = (TextView) findViewById(R.id.user); 
     textViewToChange.setText(
       "user " + selection); 

    setDateAndTime(); 
} 

public void setDateAndTime(){ 
    String currentDateTimeString = DateFormat.getDateTimeInstance().format(new Date()); 
    final TextView textViewToChange = (TextView) findViewById(R.id.time); 
    textViewToChange.setText(
      "time " + currentDateTimeString); 
} 
@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_activity2, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

@Override 
public void onBackPressed() { 
    finish(); 
    super.onBackPressed(); 
} 

LogCat:

08-24 14:43:17.713 3063-3063/dbxprts.moldtech E/AndroidRuntime﹕ FATAL EXCEPTION: main 
Process: dbxprts.moldtech, PID: 3063 
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.view.View.getContext()' on a null object reference 
     at dbxprts.moldtech.MainActivity$1.onItemSelected(MainActivity.java:30) 
     at android.widget.AdapterView.fireOnSelected(AdapterView.java:897) 
     at android.widget.AdapterView.selectionChanged(AdapterView.java:884) 
     at android.widget.AdapterView.checkSelectionChanged(AdapterView.java:1047) 
     at android.widget.AdapterView.handleDataChanged(AdapterView.java:1027) 
     at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:184) 
     at android.widget.Spinner.onMeasure(Spinner.java:507) 
     at android.view.View.measure(View.java:17430) 
     at android.widget.RelativeLayout.measureChild(RelativeLayout.java:697) 
     at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
     at android.support.v7.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:453) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
     at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1436) 
     at android.widget.LinearLayout.measureVertical(LinearLayout.java:722) 
     at android.widget.LinearLayout.onMeasure(LinearLayout.java:613) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5463) 
     at android.widget.FrameLayout.onMeasure(FrameLayout.java:430) 
     at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2560) 
     at android.view.View.measure(View.java:17430) 
     at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2001) 
     at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1166) 
     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1372) 
     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1054) 
     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5779) 
     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) 
     at android.view.Choreographer.doCallbacks(Choreographer.java:580) 
     at android.view.Choreographer.doFrame(Choreographer.java:550) 
     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) 
     at android.os.Handler.handleCallback(Handler.java:739) 
     at android.os.Handler.dispatchMessage(Handler.java:95) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5221) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 

Answer 1

Изменить это:

Intent intent = new Intent(view.getContext().getApplicationContext(), Activity2.class); 
    view.getContext().startActivity(intent); 
    intent.putExtra("sel", spinner.getSelectedItem().toString()); 
    startActivity(intent); 

к

Intent intent = new Intent(MainActivity.this, Activity2.class); 
intent.putExtra("sel", spinner.getSelectedItem().toString()); 
startActivity(intent);