/*
* Copyright (c) 2015, 张涛.
*
* 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 org.kymjs.blog.ui;
import org.kymjs.blog.R;
import org.kymjs.blog.ui.widget.EmptyLayout;
import org.kymjs.kjframe.ui.BindView;
import org.kymjs.kjframe.ui.ViewInject;
import org.kymjs.kjframe.utils.StringUtils;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationUtils;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebSettings.PluginState;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
/**
* 浏览器
*
* @author kymjs (http://www.kymjs.com/)
*
*/
public class Browser extends TitleBarActivity {
@BindView(id = R.id.webview)
WebView mWebView;
@BindView(id = R.id.browser_back, click = true)
ImageView mImgBack;
@BindView(id = R.id.browser_forward, click = true)
ImageView mImgForward;
@BindView(id = R.id.browser_refresh, click = true)
ImageView mImgRefresh;
@BindView(id = R.id.browser_system_browser, click = true)
ImageView mImgSystemBrowser;
@BindView(id = R.id.browser_bottom)
LinearLayout mLayoutBottom;
@BindView(id = R.id.progress)
ProgressBar mProgress;
@BindView(id = R.id.empty_layout)
private EmptyLayout mEmptyLayout;
public static final String BROWSER_KEY = "browser_url";
public static final String BROWSER_TITLE_KEY = "browser_title_url";
public static final String DEFAULT = "http://blog.kymjs.com/";
private int flag = 1; // 双击事件需要
private String mCurrentUrl = DEFAULT;
private String strTitle;
private Animation animBottomIn, animBottomOut;
private GestureDetector mGestureDetector;
@Override
public void setRootView() {
setContentView(R.layout.aty_browser);
}
@Override
public void initData() {
Intent intent = getIntent();
if (intent != null) {
mCurrentUrl = intent.getStringExtra(BROWSER_KEY);
strTitle = intent.getStringExtra(BROWSER_TITLE_KEY);
if (StringUtils.isEmpty(mCurrentUrl)) {
mCurrentUrl = DEFAULT;
}
if (StringUtils.isEmpty(strTitle)) {
strTitle = getString(R.string.app_name);
}
}
}
@Override
public void initWidget() {
super.initWidget();
initWebView();
initBarAnim();
mGestureDetector = new GestureDetector(aty, new MyGestureListener());
mWebView.loadUrl(mCurrentUrl);
mWebView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return mGestureDetector.onTouchEvent(event);
}
});
}
/**
* 初始化上下栏的动画并设置结束监听事件
*/
private void initBarAnim() {
animBottomIn = AnimationUtils.loadAnimation(aty, R.anim.anim_bottom_in);
animBottomOut = AnimationUtils.loadAnimation(aty,
R.anim.anim_bottom_out);
animBottomIn.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {}
@Override
public void onAnimationRepeat(Animation animation) {}
@Override
public void onAnimationEnd(Animation animation) {
mLayoutBottom.setVisibility(View.VISIBLE);
}
});
animBottomOut.setAnimationListener(new AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {}
@Override
public void onAnimationRepeat(Animation animation) {}
@Override
public void onAnimationEnd(Animation animation) {
mLayoutBottom.setVisibility(View.GONE);
}
});
}
@Override
protected void onResume() {
super.onResume();
mWebView.onResume();
}
@Override
protected void onPause() {
super.onPause();
mWebView.onPause();
}
@Override
protected void onDestroy() {
super.onDestroy();
mWebView.destroy();
}
@Override
public void widgetClick(View v) {
super.widgetClick(v);
switch (v.getId()) {
case R.id.browser_back:
mWebView.goBack();
break;
case R.id.browser_forward:
mWebView.goForward();
break;
case R.id.browser_refresh:
mWebView.loadUrl(mWebView.getUrl());
break;
case R.id.browser_system_browser:
try {
// 启用外部浏览器
Uri uri = Uri.parse(mCurrentUrl);
Intent it = new Intent(Intent.ACTION_VIEW, uri);
aty.startActivity(it);
} catch (Exception e) {
ViewInject.toast("网页地址错误");
}
break;
}
}
/**
* 载入链接之前会被调用
*
* @param view
* WebView
* @param url
* 链接地址
*/
protected void onUrlLoading(WebView view, String url) {
mProgress.setVisibility(View.VISIBLE);
}
/**
* 链接载入成功后会被调用
*
* @param view
* WebView
* @param url
* 链接地址
*/
protected void onUrlFinished(WebView view, String url) {
mCurrentUrl = url;
mProgress.setVisibility(View.GONE);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
if (mWebView.canGoBack()) {
mWebView.goBack();
} else {
finish();
}
return true;
} else {
return super.onKeyDown(keyCode, event);
}
}
/**
* 当前WebView显示页面的标题
*
* @param view
* WebView
* @param title
* web页面标题
*/
protected void onWebTitle(WebView view, String title) {
if (aty != null && mWebView != null) { // 必须做判断，由于webview加载属于耗时操作，可能会本Activity已经关闭了才被调用
mTvTitle.setText(mWebView.getTitle());
}
}
/**
* 当前WebView显示页面的图标
*
* @param view
* WebView
* @param icon
* web页面图标
*/
protected void onWebIcon(WebView view, Bitmap icon) {}
/**
* 初始化浏览器设置信息
*/
private void initWebView() {
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(true); // 启用支持javascript
webSettings.setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);// 优先使用缓存
webSettings.setAllowFileAccess(true);// 可以访问文件
webSettings.setBuiltInZoomControls(true);// 支持缩放
if (android.os.Build.VERSION.SDK_INT >= 11) {
webSettings.setPluginState(PluginState.ON);
webSettings.setDisplayZoomControls(false);// 支持缩放
}
mWebView.setWebViewClient(new MyWebViewClient());
mWebView.setWebChromeClient(new MyWebChromeClient());
}
private class MyWebChromeClient extends WebChromeClient {
@Override
public void onReceivedTitle(WebView view, String title) {
super.onReceivedTitle(view, title);
onWebTitle(view, title);
}
@Override
public void onReceivedIcon(WebView view, Bitmap icon) {
super.onReceivedIcon(view, icon);
onWebIcon(view, icon);
}
@Override
public void onProgressChanged(WebView view, int newProgress) { // 进度
super.onProgressChanged(view, newProgress);
if (newProgress > 60) {
mEmptyLayout.dismiss();
mProgress.setVisibility(View.GONE);
}
}
}
private class MyWebViewClient extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
onUrlLoading(view, url);
boolean flag = super.shouldOverrideUrlLoading(view, url);
mCurrentUrl = url;
return flag;
}
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
onUrlFinished(view, url);
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
ViewInject.toast("没有找到数据");
mWebView.loadDataWithBaseURL(null, "", "text/html", "utf-8", null);
}
}
private class MyGestureListener extends SimpleOnGestureListener {
@Override
public boolean onDoubleTap(MotionEvent e) {// webview的双击事件
if (flag % 2 == 0) {
flag++;
mLayoutBottom.startAnimation(animBottomIn);
} else {
flag++;
mLayoutBottom.startAnimation(animBottomOut);
}
return super.onDoubleTap(e);
}
}
}