Android Programming Tutorials

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To get to HelpCast, let us add a Button to the HelpPage layout and wire it up

so, when clicked, the Button launches HelpCast.

First, add a suitable Button to Patchy/res/layout/help.xml:

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

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

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

<WebView android:id="@+id/webkit"

android:layout_width="fill_parent"

android:layout_height="0px"

android:layout_weight="1"

/>

<Button android:id="@+id/helpcast"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="View Helpcast"

/>

</LinearLayout>

Then, add logic to HelpPage to find the Button and set the on-click listener

to an object that will call startActivity() on HelpCast:

package apt.tutorial.two;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.webkit.WebView;

import android.widget.Button;

public class HelpPage extends Activity {

private WebView browser;

@Override

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

setContentView(R.layout.help);

browser=(WebView)findViewById(R.id.webkit);

browser.loadUrl("file:///android_asset/help.html");

Button cast=(Button)findViewById(R.id.helpcast);

cast.setOnClickListener(onCast);

}

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