Webview表示中に、mail telリンクを押された時にIntentを投げるようにする

tel_mail_webview.java

package jp.logiclogic.jikken;

import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.FragmentActivity;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class MainActivity extends FragmentActivity {	
	private WebView mWebView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);

		mWebView = (WebView) findViewById(R.id.webview);
		mWebView.setWebViewClient(new WebViewClient(){
			@Override
			public boolean shouldOverrideUrlLoading(WebView view, String url) {
				if (url.startsWith("tel:")) {
					// 電話発信ダイアログ
					TelDialogFragment dialogFragment = TelDialogFragment.newInstance(url);
					dialogFragment.show(MainActivity.this.getSupportFragmentManager(), "tel_dialog");
					return true;
				}else if(url.startsWith("mailto:")){
					Intent intent = new Intent(Intent.ACTION_SENDTO,Uri.parse(url));
					startActivity(intent);
					return true;
				}
				return true;
			}
		});
		mWebView.loadUrl("http://");;
	}

	// 電話確認ダイアログ
	public static class TelDialogFragment extends DialogFragment {
		public static TelDialogFragment newInstance(String telNumber){
			TelDialogFragment frag = new TelDialogFragment();
			Bundle args = new Bundle();
			args.putString("tel_number", telNumber);
			frag.setArguments(args);
			return frag;
		}
		@Override
		public Dialog onCreateDialog(Bundle savedInstanceState) {
			AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
			builder.setTitle("確認");
			builder.setMessage("発信しますか?");
			builder.setPositiveButton("はい",new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {
					String telNumber = (String) getArguments().get("tel_number");
					Intent intent = new Intent();
					intent.setAction(Intent.ACTION_VIEW);
					intent.setData(Uri.parse(telNumber));
					startActivity(intent);
				}
			});
			builder.setNegativeButton("いいえ",new DialogInterface.OnClickListener() {
				@Override
				public void onClick(DialogInterface dialog, int which) {}
			});
			return builder.create();
		}
	}
}