[android][java] WebViewでBasic認証入力ダイアログを出す

HttpAuthenticationDialog.java

package com.example.sample;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.inputmethod.EditorInfo;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

/**
 * HTTP authentication dialog.
 */
public class HttpAuthenticationDialog {

    private final Context mContext;

    private final String mHost;
    private final String mRealm;

    private AlertDialog mDialog;
    private TextView mUsernameView;
    private TextView mPasswordView;

    private OkListener mOkListener;
    private CancelListener mCancelListener;

    /**
     * Creates an HTTP authentication dialog.
     */
    public HttpAuthenticationDialog(Context context, String host, String realm) {
        mContext = context;
        mHost = host;
        mRealm = realm;
        createDialog();
    }

    private String getUsername() {
        return mUsernameView.getText().toString();
    }

    private String getPassword() {
        return mPasswordView.getText().toString();
    }

    /**
     * Sets the listener that will be notified when the user submits the credentials.
     */
    public void setOkListener(OkListener okListener) {
        mOkListener = okListener;
    }

    /**
     * Sets the listener that will be notified when the user cancels the authentication
     * dialog.
     */
    public void setCancelListener(CancelListener cancelListener) {
        mCancelListener = cancelListener;
    }

    /**
     * Shows the dialog.
     */
    public void show() {
        mDialog.show();
        mUsernameView.requestFocus();
    }

    /**
     * Hides, recreates, and shows the dialog. This can be used to handle configuration changes.
     */
    public void reshow() {
        String username = getUsername();
        String password = getPassword();
        int focusId = mDialog.getCurrentFocus().getId();
        mDialog.dismiss();
        createDialog();
        mDialog.show();
        if (username != null) {
            mUsernameView.setText(username);
        }
        if (password != null) {
            mPasswordView.setText(password);
        }
        if (focusId != 0) {
            mDialog.findViewById(focusId).requestFocus();
        } else {
            mUsernameView.requestFocus();
        }
    }

    private void createDialog() {
        LayoutInflater factory = LayoutInflater.from(mContext);
        View v = factory.inflate(R.layout.http_authentication, null);
        mUsernameView = (TextView) v.findViewById(R.id.username_edit);
        mPasswordView = (TextView) v.findViewById(R.id.password_edit);
        mPasswordView.setOnEditorActionListener(new OnEditorActionListener() {
            @Override
            public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
                if (actionId == EditorInfo.IME_ACTION_DONE) {
                    mDialog.getButton(AlertDialog.BUTTON_POSITIVE).performClick();
                    return true;
                }
                return false;
            }
        });

        String title = mContext.getText(R.string.sign_in_to).toString().replace(
                "%s1", mHost).replace("%s2", mRealm);

        mDialog = new AlertDialog.Builder(mContext)
                .setTitle(title)
                //.setIconAttribute(android.R.attr.alertDialogIcon)
                .setView(v)
                .setPositiveButton(R.string.action, new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        if (mOkListener != null) {
                            mOkListener.onOk(mHost, mRealm, getUsername(), getPassword());
                        }
                    }})
                .setNegativeButton(R.string.cancel,new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        if (mCancelListener != null) mCancelListener.onCancel();
                    }})
                .setOnCancelListener(new DialogInterface.OnCancelListener() {
                    public void onCancel(DialogInterface dialog) {
                        if (mCancelListener != null) mCancelListener.onCancel();
                    }})
                .create();

        // Make the IME appear when the dialog is displayed if applicable.
        mDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
    }

    /**
     * Interface for listeners that are notified when the user submits the credentials.
     */
    public interface OkListener {
        void onOk(String host, String realm, String username, String password);
    }

    /**
     * Interface for listeners that are notified when the user cancels the dialog.
     */
    public interface CancelListener {
        void onCancel();
    }
}

MainActivity.java

package com.example.sample;


import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.webkit.HttpAuthHandler;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.GeolocationPermissions.Callback;

public class MainActivity extends Activity {
    private static final String TAG = "LOG";

    // WEBサイト
    private static final String PATH = "http://hogehoge/";

    // 機種名リスト (ro.poduct.model)
    // Galaxy S3のWebViewクラッシュ対策が必要な機種名
    private static final String USE_SOFTWARE_LAYER_DEVICE[] = {
        "SC-06D",   // NTT docomo, Galaxy S3
        "SC-03E",   // NTT docomo, Galaxy S3 alpha
        "SCL21",    // au, Galaxy S3 Progre
        "GT-I9300", // Global model, Galaxy S3
    };

    private WebView mWebView = null;
    private Activity mActivity = null;

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mWebView = (WebView)findViewById(R.id.webView1);

        if (useSoftwareLayer()) {
            Log.d(TAG, "This device has WebView crash issue. Use software layer.");
            mWebView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
        }

        mWebView.getSettings().setAppCacheEnabled(true);
        mWebView.getSettings().setAppCacheMaxSize(8 * 1024 * 1024);
        mWebView.getSettings().setAppCachePath("/data/data/" + getPackageName() + "/cache");

        // 右側のスクロールバーの隙間をなくす
        mWebView.setVerticalScrollbarOverlay(true);

        // WebViewに、WebViewClientとWebChromeClientを設定する。
        mWebView.setWebViewClient(mWebViewClient);
        mWebView.setWebChromeClient(mWebChromeClient);

        mWebView.loadUrl(PATH);
        mWebView.getSettings().setJavaScriptEnabled(true);
    }

    /**
     * Galaxy S3のWebViewクラッシュ対策が必要な機種かどうかを判定する
     */
    private boolean useSoftwareLayer() {
        for (String model : USE_SOFTWARE_LAYER_DEVICE) {
            if (Build.MODEL.contains(model)) {
                return true;
            }
        }
        return false;
    }

    /**
     * onKeyDown()は、キーが押された時に呼ばれる
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // 戻る(Back)キーが押されたかどうか
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (mWebView != null && mWebView.canGoBack()) {
                mWebView.goBack();
                return true;
            } else {
                // 戻る履歴がない場合は、何もしない（Activityを終了する）。
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        if (mHttpAuthenticationDialog != null) {
            mHttpAuthenticationDialog.reshow();
        }
        super.onConfigurationChanged(newConfig);
    }


    @Override
    protected void onDestroy() {
        // WebViewリソースの解放
        if (mWebView != null) {
            // ページの読み込みを停止する
            mWebView.stopLoading();
            // セットしたWebViewClientを解除する
            mWebView.setWebViewClient(null);
            // セットしたWebChromeClientを解除する
            mWebView.setWebChromeClient(null);
            // WebViewの終了処理
            mWebView.clearCache(false);
            mWebView.destroy();
            mWebView = null;
        }
        super.onDestroy();
    }

    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    private WebViewClient mWebViewClient = new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView webview, String url) {
            return false;
        }

        /**
         * Basic認証関連の処理
         *  - HTTP basic authentication が要求された時に呼び出されるメソッド
         */
        @Override
        public void onReceivedHttpAuthRequest(WebView view,
                HttpAuthHandler handler, String host, String realm) {
            //Log.d(TAG, "onReceivedHttpAuthRequest(): host=" + host + " realm=" + realm);
            String username = null;
            String password = null;

            boolean reuseHttpAuthUsernamePassword
                    = handler.useHttpAuthUsernamePassword();

            if (reuseHttpAuthUsernamePassword && view != null) {
                String[] credentials = view.getHttpAuthUsernamePassword(host, realm);
                if (credentials != null && credentials.length == 2) {
                    username = credentials[0];
                    password = credentials[1];
                }
            }

            if (username != null && password != null) {
                handler.proceed(username, password);
            } else {
                showHttpAuthentication(handler, host, realm);
            }
        }
    };

    private WebChromeClient mWebChromeClient = new WebChromeClient() {
        /**
         * JavaScriptからの位置情報取得を許可する
         * 今回は、ユーザーに位置情報取得するかどうかの確認ダイアログは表示しない
         */
        @TargetApi(Build.VERSION_CODES.ECLAIR)
        @Override
        public void onGeolocationPermissionsShowPrompt(final String origin,
                final Callback callback) {
            super.onGeolocationPermissionsShowPrompt(origin, callback);
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR) {
                    callback.invoke(origin, true, false);
                }
        }
    };

    // ***********************************************************************/
    // Basic認証情報入力ダイアログの表示関連処理
    //  - テスト用サイトは、Basic認証がかかっているため、ユーザー名とパスワードを入力して、
    //    認証を解除する必要がある。
    //  - 本番サイトではBasic認証は必要ないため、本コードは削除します。
    // ***********************************************************************/
    private HttpAuthenticationDialog mHttpAuthenticationDialog;

    /**
     * Displays an http-authentication dialog.
     */
    void showHttpAuthentication(final HttpAuthHandler handler, String host, String realm) {
        mHttpAuthenticationDialog = new HttpAuthenticationDialog(MainActivity.this, host, realm);
        mHttpAuthenticationDialog.setOkListener(new HttpAuthenticationDialog.OkListener() {
            public void onOk(String host, String realm, String username, String password) {
                setHttpAuthUsernamePassword(host, realm, username, password);
                handler.proceed(username, password);
                mHttpAuthenticationDialog = null;
            }
        });
        mHttpAuthenticationDialog.setCancelListener(new HttpAuthenticationDialog.CancelListener() {
            public void onCancel() {
                handler.cancel();
                //mController.onUpdatedSecurityState(tab);
                mHttpAuthenticationDialog = null;
            }
        });
        mHttpAuthenticationDialog.show();
    }

    /**
     * Set HTTP authentication password.
     *
     * @param host The host for the password
     * @param realm The realm for the password
     * @param username The username for the password. If it is null, it means
     *            password can't be saved.
     * @param password The password
     */
    public void setHttpAuthUsernamePassword(String host, String realm,
                                            String username,
                                            String password) {
        if (mWebView != null) {
            mWebView.setHttpAuthUsernamePassword(host, realm, username, password);
        }
    }
    // Basic認証関連の処理　ここまで
    // ***********************************************************************/
}

string.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">

    <string name="app_name">AppName</string>
    <string name="action_settings">Settings</string>

    <!-- Basic認証処理用の文字列リソース -->
    <string name="sign_in_to">Sign in to <xliff:g id="hostname">%s1</xliff:g> \"<xliff:g id="realm">%s2</xliff:g>\"</string>
    <string name="username">Name</string>
    <string name="password">Password</string>
    <string name="action">Sign in</string>
    <string name="cancel">Cancel</string>

</resources>