I am new to Android development. I am experimenting with making a simple app that displays a number that increases by one when the Up button is pressed and decreases by one when the Down button is pressed. It works correctly, except when I rotate the device from landscape to portrait or vice versa, the number is reset to 0. Here is the code:
package com.example.jz.counter; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends Activity implements View.OnClickListener { private int counter = 0; private TextView OutputViewObject; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); OutputViewObject = (TextView)findViewById(R.id.outputView); OutputViewObject.setText("" + counter); final Button buttonUp = (Button)findViewById(R.id.up_button); final Button buttonDown = (Button)findViewById(R.id.down_button); buttonUp.setOnClickListener(this); buttonDown.setOnClickListener(this); } @Override public void onClick(View view) { switch (view.getId()) { case R.id.up_button: counter++; OutputViewObject.setText("" + counter); break; case R.id.down_button: counter--; OutputViewObject.setText("" + counter); break; } } } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. To post to this group, send email to android-developers@googlegroups.com. Visit this group at https://groups.google.com/group/android-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/android-developers/b3914417-fcc4-4e3d-99d2-e7f92a939c40%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.