WebView的缓存方案：H5缓存机制 + 资源预加载 + 资源拦截.zip

package com.example.carson_ho.webview_demo; import android.graphics.Bitmap; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.KeyEvent; import android.view.ViewGroup; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.TextView; public class MainActivity extends AppCompatActivity { WebView mWebview; WebSettings mWebSettings; TextView beginLoading,endLoading,loading,mtitle; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mWebview = (WebView) findViewById(R.id.webView1); beginLoading = (TextView) findViewById(R.id.text_beginLoading); endLoading = (TextView) findViewById(R.id.text_endLoading); loading = (TextView) findViewById(R.id.text_Loading); mtitle = (TextView) findViewById(R.id.title); mWebSettings = mWebview.getSettings(); mWebview.loadUrl("http://www.baidu.com/"); //设置不用系统浏览器打开,直接显示在当前Webview mWebview.setWebViewClient(new WebViewClient() { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { view.loadUrl(url); return true; } }); //设置WebChromeClient类 mWebview.setWebChromeClient(new WebChromeClient() { //获取网站标题 @Override public void onReceivedTitle(WebView view, String title) { System.out.println("标题在这里"); mtitle.setText(title); } //获取加载进度 @Override public void onProgressChanged(WebView view, int newProgress) { if (newProgress < 100) { String progress = newProgress + "%"; loading.setText(progress); } else if (newProgress == 100) { String progress = newProgress + "%"; loading.setText(progress); } } }); //设置WebViewClient类 mWebview.setWebViewClient(new WebViewClient() { //设置加载前的函数 @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { System.out.println("开始加载了"); beginLoading.setText("开始加载了"); } //设置结束加载函数 @Override public void onPageFinished(WebView view, String url) { endLoading.setText("结束加载了"); } }); } //点击返回上一页面而不是退出浏览器 @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && mWebview.canGoBack()) { mWebview.goBack(); return true; } return super.onKeyDown(keyCode, event); } //销毁Webview @Override protected void onDestroy() { if (mWebview != null) { mWebview.loadDataWithBaseURL(null, "", "text/html", "utf-8", null); mWebview.clearHistory(); ((ViewGroup) mWebview.getParent()).removeView(mWebview); mWebview.destroy(); mWebview = null; } super.onDestroy(); } }