title: How to save variable values when leaving activity?
body: <p>I'm trying to implement two mwthods to save variable informaton after I leave the activity,but I'm getting an error: <code>markOne cannot be resolved to a variable</code> on each of the variables.I have placed the two methods outside of OnCreate() .I have posted the whole class below showing how I  implemented the <code>onSaveInstanceState</code> and <code>onRestoreInstanceState</code> methods.Could someone show me why the variales are not being resolved? I'm guessing its because the variables can't be accessed outside of onCreate() but how would I fix this problem?</p>
  
  <pre><code>public class CalcResult extends Activity implements OnClickListener{
  
      TextView result1,result2,result3;
  
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.result);
  
          final Intent intent1=new Intent(this,AboutActivity.class);
          final Intent intent2=new Intent(this,MainActivity.class);
          final Intent intent3=new Intent(this,MainActivity.class);
  
  
  
          final ViewGroup actionBarLayout = (ViewGroup) getLayoutInflater().inflate(
                  R.layout.a,
                  null);
  
          // Set up your ActionBar
          final ActionBar actionBar = getActionBar();
          actionBar.setDisplayShowHomeEnabled(false);
          actionBar.setDisplayShowTitleEnabled(false);
          actionBar.setDisplayShowCustomEnabled(true);
          actionBar.setCustomView(actionBarLayout);
  
          // You customization
          final int actionBarColor = getResources().getColor(R.color.action_bar);
          actionBar.setBackgroundDrawable(new ColorDrawable(actionBarColor));
  
          final Button actionBarHome = (Button) findViewById(R.id.action_bar_title);
          actionBarHome.setBackgroundResource(R.drawable.ic_action_back);
          actionBarHome.setOnClickListener(this);
          actionBarHome.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View view) {                
  
                 startActivity(intent2);
  
              }
  
          });
  
          final Button actionBarInfo = (Button) findViewById(R.id.action_bar_staff);
          actionBarInfo.setBackgroundResource(R.drawable.ic_action_help);
          actionBarInfo.setOnClickListener(this);
          actionBarInfo.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View view) {                
  
                 startActivity(intent1);
  
              }
  
          });
  
  
          final Button actionBarHoome = (Button) findViewById(R.id.action_bar_home);
          actionBarHoome.setBackgroundResource(R.drawable.appicon);
          actionBarHoome.setOnClickListener(this);
          actionBarHoome.setOnClickListener(new View.OnClickListener() {
  
              @Override
              public void onClick(View view) {                
  
                 startActivity(intent3);
  
              }
  
          });
  
          result1 = (TextView)findViewById(R.id.markOne);
          result2 = (TextView)findViewById(R.id.markTwo);
          result3 = (TextView)findViewById(R.id.markThree);
  
          Intent intent = getIntent();
          double markOne = intent.getDoubleExtra("number1", 0);
          double markTwo = intent.getDoubleExtra("number2", 0);
          double markThree = intent.getDoubleExtra("number3", 0);
  
          DecimalFormat df = new DecimalFormat("#.##");
  
          result1.setText(String.valueOf(df.format(markOne)+"mm"));
          result2.setText(String.valueOf(df.format(markTwo)+"mm"));
          result3.setText(String.valueOf(df.format(markThree)+"mm"));
  
      }
  
      //Two methods I'm trying to implement -&gt;
      @Override
      protected final void onSaveInstanceState(final Bundle outState)
      {
          // Save variables.
          outState.putString("markOne", markOne);
          outState.putString("markTwo", markTwo);
          outState.putString("markThree", markThree);
  
      }
  
      @Override
      protected final void onRestoreInstanceState(final Bundle outState)
      {
          // Restore saved variables and reshow activities if they were open.
          markOne = outState.getString("markOne", "");
          markTwo = outState.getString("markTwo", "");
          markThree = outState.getString("markThree", "");
  
      }
  
  }
  </code></pre>