Android Programming Tutorials

Look Inside Yourself

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

if (CONTENT_URI==null) {

Toast

.makeText(this, "We are experiencing technical difficulties...",

Toast.LENGTH_LONG)

.show();

finish();

return;

}

setContentView(R.layout.main);

Button btn=(Button)findViewById(R.id.pick);

btn.setOnClickListener(new View.OnClickListener() {

public void onClick(View view) {

Intent i=new Intent(Intent.ACTION_PICK, CONTENT_URI);

startActivityForResult(i, PICK_REQUEST);

}

});

}

We first check to ensure our derived CONTENT_URI value is found; if not, we

shut down the application, since there is nothing we can do. Otherwise, we

load the layout, get the Button, and have it startActivityForResult() on the

ACTION_PICK Intent on a button click.

We also need an implementation of PICK_REQUEST:

private static final int PICK_REQUEST= 1337 ;

Step #5: Populate the List

We are not doing anything presently after the user makes their selection.

What we want to do is display a roster of possible actions in the ListView in

our layout.

First, create a layout to use with our rows, as Contacter/res/layout/row.xml:

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

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