Question

For example if I have 3 buttons and I want to use this buttons to redirect to different urls without use many webviews but only one webview.

button1 = http://example.com
button2 = http://stackoverflow.com
button3 = http://android.com

Answer 1

On the click of each Button:

Intent intent = new Intent(context, THE_ACTIVITY_THAT_HOLDS_WEBVIEW.class);
intent.setData(Uri.parse("http://www.facebook.com"));
startActivity(intent);

Change the URL that has to be passed to the WebView depending on the Button clicked.

In the Activity that holds the WebView:

WebView webView = (WebView) findViewById(R.id.web_view);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl(this.getIntent().getDataString());

Adapt the code if you are doing things a little differently.