Android加载本地网页

1.Android项目如何创建assets文件夹

直接上图

点击finish即可

然后在该文件夹下面可以创建常规的js、css、img目录。

2.加载本地网页代码

在assets文件夹根目录下面有index.html测试文件,那么url应该这样写:

 String url = "file:///android_asset/index.html";

调用代码:

 package com.xzy.loadlocalhtmldemo;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;

 /**
  * 从本地加载网页
  */
 public class MainActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         findViewById(R.id.btn_load_webview).setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 String url = "file:///android_asset/index.html";
                 WebViewActivity.startActivity(MainActivity.this, "title", url);
             }
         });
     }
 }

其中webViewActivity可以作为一个通用加载类来使用，现在贴出代码，代码非常简单，我们可以根据实际需求扩展个通用类。

 package com.xzy.loadlocalhtmldemo;

 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.view.View;
 import android.webkit.WebChromeClient;
 import android.webkit.WebSettings;
 import android.webkit.WebView;
 import android.webkit.WebViewClient;
 import android.widget.ProgressBar;

 /**
  * webView
  */
 public class WebViewActivity extends Activity {

     public static final String TAG = "WebViewActivity";

     private ProgressBar mProgressBar;
     private WebView mWebView;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_webview);
         initView();
         initData();
     }

     /**
      * 初始化视图资源
      */
     private void initView() {
         mProgressBar = (ProgressBar) findViewById(R.id.web_progressBar);
         mWebView = (WebView) findViewById(R.id.web_wv);
     }


     /**
      * 加载初始数据
      */
     @SuppressLint("SetJavaScriptEnabled")
     protected void initData() {
         mProgressBar.setMax(100);
         WebSettings settings = mWebView.getSettings();
         settings.setJavaScriptEnabled(true);
         settings.setJavaScriptCanOpenWindowsAutomatically(true);
         settings.setSupportMultipleWindows(true);

         mWebView.setWebViewClient(new WebViewClient());
         mWebView.setWebChromeClient(new WebChromeClient() {

             @Override
             public void onProgressChanged(WebView view, int newProgress) {
                 super.onProgressChanged(view, newProgress);
                 if (newProgress == 0) {
                     mProgressBar.setVisibility(View.VISIBLE);
                 } else if (newProgress == 100) {
                     mProgressBar.setVisibility(View.GONE);
                 } else {
                     mProgressBar.setProgress(newProgress);
                 }
             }
         });

         Bundle bundle = getIntent().getExtras();
         if (bundle != null) {
             String title = bundle.getString("title");
             String url = bundle.getString("url");
             //设置标题
             //setTitleText(title);
             mWebView.loadUrl(url);
         }
     }

     /**
      * @param context 上下文
      * @param title   activity标题
      * @param url     本地网页url
      */
     public static void startActivity(Context context, String title, String url) {
         if (TextUtils.isEmpty(url)) {
             return;
         }
         Intent intent = new Intent(context, WebViewActivity.class);
         intent.putExtra("title", title);
         intent.putExtra("url", url);
         context.startActivity(intent);
     }

     @SuppressLint("SetJavaScriptEnabled")
     @Override
     protected void onResume() {
         super.onResume();
         mWebView.getSettings().setJavaScriptEnabled(true);
         mWebView.onResume();
     }

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

     @Override
     protected void onStop() {
         super.onStop();
         //挂在后台  资源释放
         mWebView.getSettings().setJavaScriptEnabled(false);
     }

     @Override
     protected void onDestroy() {
         mWebView.setVisibility(View.GONE);
         mWebView.destroy();
         super.onDestroy();
     }
 }