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WebViewActivity.java

/*
 * Copyright 2015, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.testing.espresso.web.BasicSample;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.VisibleForTesting;
import android.text.TextUtils;
import android.webkit.WebView;
import android.webkit.WebViewClient;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * An {@link Activity} that gets a text string from the user and displays it back when the user
 * clicks on one of the two buttons. The first one shows it in the same activity and the second
 * one opens another activity and displays the message.
 */
public class WebViewActivity extends Activity {

public static final String KEY_URL_TO_LOAD = "KEY_URL_TO_LOAD";

@VisibleForTesting
    protected static final String WEB_FORM_URL = "file:///android_asset/web_form.html";

private WebView mWebView;

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);
        mWebView = (WebView) findViewById(R.id.web_view);
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.loadUrl(urlFromIntent(getIntent()));
        mWebView.requestFocus();
        mWebView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                return false;
            }
        });
    }

private static String urlFromIntent(@NonNull Intent intent) {
        checkNotNull(intent, "Intent cannot be null!");
        String url = intent.getStringExtra(KEY_URL_TO_LOAD);
        return !TextUtils.isEmpty(url) ? url : WEB_FORM_URL;
    }

}