Question

I am trying to make a ImageButton that opens a Gallery with images. I am trying to make it simple for now – just when I click the image to open the gallery with a couple of pictures. But I am not sure how to do it. I have searched on the Internet and saw that others are having the XML code that invokes one Java method – OnClick. I have the XML here:

<ImageButton
   android:id="@+id/imageView5"
   android:layout_width="@dimen/overview_schedule_image_width"
   android:layout_height="match_parent"
   android:layout_marginTop="10dp"
   android:src="@drawable/red"
   android:onClick="buttonClick" />

There is more code in the XML, but I think that’s the one that is necessary. So far it works good. But now I am not sure where to place that “buttonClick” method and what it should contain. I have made this class:

package org.imageGallery;

import org.imageGallery.actionbarcompat.ActionBarActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Gallery;

public class ButtonClickActivity extends ActionBarActivity implements OnItemSelectedListener, OnClickListener{

@Override
public void onClick(View v) {

}

@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
        long arg3) {

}

@Override
public void onNothingSelected(AdapterView<?> arg0) {

}
}

I guess the “buttonClick” method should be placed here and it should take the images. But how do I return them to the XML and how can I display them in the gallery ? I am still very new to Android, but hopefully I will manage to do it.

EDIT:

Here is a great tutorial that helped me a lot.

Answer 1

First you have to make a class that extends activity like this:

 public class Main extends Activity{}

1. then override a method called OnCreate() which launches when the activity launches.

1. override in onCreate block method called setContentView(R.layout.yourLayout) so the activity displays the xml file.

2. then get a reference to the button so you can listen to it this way: Button myButton = (Button) findViewById(R.id.button1);

if you implemented OnClickListener in your class then in the implemented method:

@Override
public void onClick(View v) {
if(v.getItemId() == R.id.button1){
//do what you want here:
startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("content://media/external/images/media/16"))) //As deeper answered to open the gallery
}