Question

I have a problem with my Android app. I have three Activities that all connect with one another with a Image button.

My problem is I can’t go back on any of the pages, just forwards. I have been reading about the back button and how to keep its state and not kill (End) it, so the user can click back if needed too.

I am new to Android and I know there’s a lot to learn. So thank you for your help.

Java code for first Activity:

package my.hope;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.content.Intent;
public class NewhopeActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ImageView myImage = (ImageView) findViewById(R.id.imagebutton1);
    myImage.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub          
                Intent intent = new Intent(NewhopeActivity.this, Act2.class);
                startActivity(intent);
            }

});
}

}

XML code:

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" android:background="@drawable/mint">


    <ImageButton
    android:id="@+id/imagebutton1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="250dp"
    android:background="@drawable/ic_launcher"
    android:onClick="Act2"
    android:src="@drawable/ic_launcher" />

    </LinearLayout>

Answer 1

What happens when you click the back button on your device? Unless specified, it kills the current activity and brings you back to the previous one.
However, if you wish to specify exactly what would clicking the back button do, you can override the onBackPressed() method:

@Override
public void onBackPressed() {
    Intent intent = new Intent(CurrentActivity.this, NextActivity.class);
    startActivity(intent);

    finish();
}