Question

I read almost all article about onSaveInstanceState and onRestoreInstanceState in Stack overflow but I cant solve my problem.
I have a text view and button in my main.java and while you click on button value of a ( a is an int variable) variable will increase and show in the text view, but, when I rotate my phone ( orientation change), text view reset.

I override onSaveInstanceState and onRestoreInstanceState but it doesn’t work.
one more thing, I have special layout-land.xml file for landscape view.

here is my code

 import android.app.Activity; 
 import android.graphics.Typeface; 
 import android.os.Bundle;
 import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;

 public class main extends Activity {
     /** Called when the activity is first created. */   
   public int a = 0;     
   public String fonts="TAHOMA.TTF";

   TextView tv = (TextView) findViewById(R.id.salavat);      
   Button b = (Button) findViewById(R.id.showsalavat);

   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       b.setOnClickListener(new Button.OnClickListener() {
            public void onClick(View arg0) {
               a++;
               tv.setText(""+a);
            }
       });
   }
   @Override        
   protected void onSaveInstanceState(Bundle SavedInstanceState) {
      super.onSaveInstanceState(SavedInstanceState);            
      SavedInstanceState.putInt("salavat-count", a);
   }
   @Override    
   protected void onRestoreInstanceState(Bundle savedInstanceState) {
       super.onRestoreInstanceState(savedInstanceState);     
       a= savedInstanceState.getInt ("salavat-count");   
   } 
}

and here my main.xml

    <TextView
        android:id="@+id/shoma"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="right"
        android:text="@string/shoma"
        android:textSize="20sp" />

    <Button
        android:id="@+id/showsalavat"
        android:layout_width="fill_parent"
        android:layout_height="150dp"
        android:text="+"
        android:textSize="100sp" />

    <TextView
        android:id="@+id/eltemas"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="55dp"
        android:text="@string/eltemas" />

    <TextView
        android:id="@+id/salavat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="35sp" />

    <TextView
        android:id="@+id/ferestade"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="24dp"
        android:text="@string/salavat"
        android:textSize="20sp" />

</LinearLayout>

I really need some help on this.
I really appreciate your help.

Answer 1

I think this code is helpful for you..

public class MainActivity extends Activity 
{

    protected void onSaveInstanceState(Bundle outState) 
    {
        super.onSaveInstanceState(outState);
        System.out.println("TAG, onSavedInstanceState");

        final TextView text = (TextView)findViewById(R.id.textView1);
        CharSequence userText = text.getText();
        outState.putCharSequence("savedText", userText);
    }
    protected void onRestoreInstanceState(Bundle savedState) 
    {       
        System.out.println("TAG, onRestoreInstanceState");
        final TextView text = (TextView)findViewById(R.id.textView1);
        CharSequence userText = savedState.getCharSequence("savedText");
        text.setText(userText);
    }
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final String name = "5";

        final TextView show = (TextView)findViewById(R.id.textView1);
        Button btn = (Button)findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() 
        {

            public void onClick(View v) 
            {
                // TODO Auto-generated method stub

                show.setText(name);

            }
        });
    }
}