Java tutorial
// Copyright 2015 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. package org.chromium.chrome.browser.infobar; import android.content.Context; import android.graphics.Bitmap; import android.support.v4.view.ViewCompat; import android.view.View; import android.widget.Button; import android.widget.ImageView; import org.chromium.base.ApiCompatibilityUtils; import org.chromium.base.ContextUtils; import org.chromium.base.annotations.CalledByNative; import org.chromium.chrome.R; import org.chromium.chrome.browser.banners.AppData; import org.chromium.chrome.browser.widget.DualControlLayout; /** * Infobar informing the user about an app related to this page. */ public class AppBannerInfoBarAndroid extends ConfirmInfoBar implements View.OnClickListener { // Installation states. public static final int INSTALL_STATE_NOT_INSTALLED = 0; public static final int INSTALL_STATE_INSTALLING = 1; public static final int INSTALL_STATE_INSTALLED = 2; // Views composing the infobar. private Button mButton; private InfoBarControlLayout mMessageLayout; private View mTitleView; private View mIconView; private final String mAppTitle; // Data for native app installs. private final AppData mAppData; private int mInstallState; // Data for web app installs. private final String mAppUrl; // Indicates whether the infobar is for installing a WebAPK. private boolean mIsWebApk; // Banner for native apps. private AppBannerInfoBarAndroid(String appTitle, Bitmap iconBitmap, AppData data) { super(0, iconBitmap, appTitle, null, data.installButtonText(), null); mAppTitle = appTitle; mAppData = data; mAppUrl = null; mInstallState = INSTALL_STATE_NOT_INSTALLED; } // Banner for web apps. private AppBannerInfoBarAndroid(String appTitle, Bitmap iconBitmap, String url, boolean isWebApk) { super(0, iconBitmap, appTitle, null, getAddToHomescreenText(), null); mAppTitle = appTitle; mAppData = null; mAppUrl = url; mIsWebApk = isWebApk; mInstallState = INSTALL_STATE_NOT_INSTALLED; } @Override public void createContent(InfoBarLayout layout) { super.createContent(layout); mButton = layout.getPrimaryButton(); mIconView = layout.getIcon(); layout.setIsUsingBigIcon(); layout.setMessage(mAppTitle); mMessageLayout = layout.getMessageLayout(); mTitleView = layout.getMessageTextView(); Context context = getContext(); if (mAppData != null) { // Native app. layout.getPrimaryButton().setButtonColor( ApiCompatibilityUtils.getColor(context.getResources(), R.color.app_banner_install_button_bg)); mMessageLayout.addRatingBar(mAppData.rating()); mMessageLayout.setContentDescription(context .getString(R.string.app_banner_view_native_app_accessibility, mAppTitle, mAppData.rating())); updateButton(); } else { // Web app. mMessageLayout.addDescription(mAppUrl); mMessageLayout.setContentDescription( context.getString(R.string.app_banner_view_web_app_accessibility, mAppTitle, mAppUrl)); } // Hide uninteresting views from accessibility. if (mIconView != null) { ViewCompat.setImportantForAccessibility(mIconView, View.IMPORTANT_FOR_ACCESSIBILITY_NO); } // Clicking on the controls brings up the app's details. The OnClickListener has to be // added to both the TextView and its parent because the TextView has special handling for // links within the text. mMessageLayout.setOnClickListener(this); mTitleView.setOnClickListener(this); if (mIconView != null) mIconView.setOnClickListener(this); } @Override protected void setButtons(InfoBarLayout layout, String primaryText, String secondaryText) { if (mAppData == null) { // The banner for web apps uses standard buttons. super.setButtons(layout, primaryText, secondaryText); } else { // The banner for native apps shows a Play logo in place of a secondary button. assert secondaryText == null; ImageView playLogo = new ImageView(layout.getContext()); playLogo.setImageResource(R.drawable.google_play); layout.setBottomViews(primaryText, playLogo, DualControlLayout.ALIGN_APART); } } @Override public void onButtonClicked(boolean isPrimaryButton) { if (isPrimaryButton && mInstallState == INSTALL_STATE_INSTALLING) { setControlsEnabled(true); updateButton(); return; } super.onButtonClicked(isPrimaryButton); } @CalledByNative public void onInstallStateChanged(int newState) { setControlsEnabled(true); mInstallState = newState; updateButton(); } private void updateButton() { if (mButton == null || (mAppData == null && !mIsWebApk)) return; String text; String accessibilityText = null; boolean enabled = true; Context context = getContext(); if (mInstallState == INSTALL_STATE_NOT_INSTALLED) { if (mIsWebApk) { // If the installation of the WebAPK fails, the banner will disappear and // a failure toast will be shown. return; } text = mAppData.installButtonText(); accessibilityText = context.getString(R.string.app_banner_view_native_app_install_accessibility, text); } else if (mInstallState == INSTALL_STATE_INSTALLING) { text = mIsWebApk ? context.getString(R.string.app_banner_installing_webapk) : context.getString(R.string.app_banner_installing); enabled = false; } else { text = context.getString(R.string.app_banner_open); } mButton.setText(text); mButton.setContentDescription(accessibilityText); mButton.setEnabled(enabled); } @Override public void onClick(View v) { if (v == mMessageLayout || v == mTitleView || v == mIconView) onLinkClicked(); } private static String getAddToHomescreenText() { return ContextUtils.getApplicationContext().getString(R.string.menu_add_to_homescreen); } @CalledByNative private static InfoBar createNativeAppInfoBar(String appTitle, Bitmap iconBitmap, AppData appData) { return new AppBannerInfoBarAndroid(appTitle, iconBitmap, appData); } @CalledByNative private static InfoBar createWebAppInfoBar(String appTitle, Bitmap iconBitmap, String url, boolean isWebApk) { return new AppBannerInfoBarAndroid(appTitle, iconBitmap, url, isWebApk); } }