Intent intent = new Intent(MainActivity.this, MainWebViewActivity.class);
intent.putExtra("url", "http://blog.csdn.net/qq_20785431");
intent.putExtra("title", "我的博客");
startActivity(intent);
package com.per.loadingwebviewdome;
import android.content.Context;
import android.os.Environment;
import android.util.AttributeSet;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;
/**
* @author: xiaolijuan
* @description: 带加载条的webview
* @date: 2016-06-03
* @time: 23:34
*/
public class LoadingWebView extends WebView {
private ProgressBar mProgressBar;
/**
* 网页缓存目录
*/
private static final String cacheDirPath = Environment
.getExternalStorageDirectory() + "/LoadingWebViewDome/webCache/";
public LoadingWebView(Context context) {
super(context, null);
}
public LoadingWebView(Context context, AttributeSet attrs) {
super(context, attrs, 0);
}
public LoadingWebView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initContext(context);
}
private void initContext(Context context) {
requestFocus();
setInitialScale(39);
getSettings().setJavaScriptCanOpenWindowsAutomatically(true);//支持通过Javascript打开新窗口
getSettings().setJavaScriptEnabled(true);//设置WebView属性,能够执行Javascript脚本
getSettings().setUseWideViewPort(true);//将图片调整到适合webview的大小
getSettings().setLoadWithOverviewMode(true);// 缩放至屏幕的大小
getSettings().setDomStorageEnabled(true);//设置是否启用了DOM Storage API
getSettings().setDatabaseEnabled(true);//开启database storage API功能
getSettings().setDatabasePath(cacheDirPath); //设置数据库缓存路径
getSettings().setAppCachePath(cacheDirPath);//设置Application Caches缓存目录
getSettings().setAppCacheEnabled(true);//开启Application Caches功能
}
/**
* 加载网页url
*
* @param url
*/
public void loadMessageUrl(String url) {
super.loadUrl(url);
setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) { // 重写此方法表明点击网页里面的链接不调用系统浏览器,而是在本WebView中显示
loadUrl(url);//加载需要显示的网页
return true;
}
});
}
/**
* 添加进度条
*/
public void addProgressBar() {
mProgressBar = new ProgressBar(getContext(), null,
android.R.attr.progressBarStyleHorizontal);
mProgressBar.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT, 5, 0, 0));
mProgressBar.setProgressDrawable(getContext().getResources()
.getDrawable(R.drawable.bg_pb_web_loading));
addView(mProgressBar);//添加进度条至LoadingWebView中
setWebChromeClient(new WebChromeClient());//设置setWebChromeClient对象
}
public class WebChromeClient extends android.webkit.WebChromeClient {
@Override
public void onProgressChanged(WebView view, int newProgress) {
if (newProgress == 100) {
mProgressBar.setVisibility(GONE);
} else {
if (mProgressBar.getVisibility() == GONE)
mProgressBar.setVisibility(VISIBLE);
mProgressBar.setProgress(newProgress);
}
super.onProgressChanged(view, newProgress);
}
}
/**
* 回收webview
*/
public void destroyWebView() {
clearCache(true);
clearHistory();
}
}
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <include layout="@layout/common_top_banner" /> <com.per.loadingwebviewdome.LoadingWebView android:id="@+id/wv_loading" android:layout_width="match_parent" android:layout_height="match_parent" /> </LinearLayout>
package com.per.loadingwebviewdome;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
/**
* @author: xiaolijuan
* @description: 通用的带进度条的WebView
* @date: 2016-06-03
* @time: 23:32
*/
public class MainWebViewActivity extends Activity implements View.OnClickListener {
private ImageView mIvBack;
private TextView mTvTitle;
private LoadingWebView mLoadingWebView;
private String mTitle = "";
private String mUrl = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_webview);
initView();
initData();
}
private void initView() {
mIvBack = (ImageView) findViewById(R.id.iv_back);
mLoadingWebView = (LoadingWebView) findViewById(R.id.wv_loading);
mTvTitle = (TextView) findViewById(R.id.tv_title);
mLoadingWebView.addProgressBar();
mIvBack.setOnClickListener(this);
}
private void initData() {
mTitle = getIntent().getStringExtra("title");
mUrl = getIntent().getStringExtra("url");
mLoadingWebView.loadMessageUrl(mUrl);
mTvTitle.setText(mTitle);
}
@Override
public void onDestroy() {
super.onDestroy();
mLoadingWebView.destroyWebView();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.iv_back:
if (mLoadingWebView.canGoBack())
mLoadingWebView.goBack();
else {
finish();
}
break;
}
}
/**
* 按返回键时, 不退出程序而是返回WebView的上一页面
*/
@Override
public void onBackPressed() {
if (mLoadingWebView.canGoBack())
mLoadingWebView.goBack();
else {
super.onBackPressed();
}
}
}
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