webview和H5 清除缓存和缓存文件删除。(webview清除数据)

webview和H5 清除缓存和缓存文件删除。缓存请看： java.io.File; import android.app.Activity; import android.graphics.Bitmap; import android.os.Bundle; import android.util.Log; import android.view.View; import android.webkit.JsPromptResult; import android.webkit.JsResult; import android.webkit.WebChromeClient; import android.webkit.WebSettings; import android.webkit.WebSettings.RenderPriority; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; public class MainActivity extendsActivity { privatestatic final String APP_CACAHE_DIRNAME = "/webcache"; privateTextView tv_topbar_title; privateRelativeLayout rl_loading; privateWebView mWebView; privateString url; @Override protectedvoid onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); url =" initView(); } privatevoid initView() { tv_topbar_title = (TextView) findViewById(R.id.tv_topbar_title); rl_loading = (RelativeLayout) findViewById(R.id.rl_loading); mWebView = (WebView) findViewById(R.id.mWebView); initWebView(); mWebView.setWebViewClient(newWebViewClient() { @Override publicvoid onLoadResource(WebView view, String url) { super.onLoadResource(view, url); } @Override publicboolean shouldOverrideUrlLoading(WebView webview, String url) { webview.loadUrl(url); returntrue; } @Override publicvoid onPageStarted(WebView view, String url, Bitmap favicon) { rl_loading.setVisibility(View.VISIBLE);// 显示加载界面 } @Override publicvoid onPageFinished(WebView view, String url) { String title = view.getTitle(); tv_topbar_title.setText(title); tv_topbar_title.setVisibility(View.VISIBLE); rl_loading.setVisibility(View.GONE);// 隐藏加载界面 } @Override publicvoid onReceivedError(WebView view,int errorCode, String description, String failingUrl) { rl_loading.setVisibility(View.GONE);// 隐藏加载界面 Toast.makeText(getApplicationContext(),"", Toast.LENGTH_LONG).show(); } }); mWebView.setWebChromeClient(newWebChromeClient() { @Override publicboolean onJsAlert(WebView view, String url, String message, JsResult result) { Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show(); result.confirm(); returntrue; } @Override publicboolean onJsConfirm(WebView view, String url, String message, JsResult result) { returnsuper.onJsConfirm(view, url, message, result); } @Override publicboolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) { returnsuper.onJsPrompt(view, url, message, defaultValue, result); } }); mWebView.loadUrl(url); } privatevoid initWebView() { mWebView.getSettings().setJavaScriptEnabled(true); mWebView.getSettings().setRenderPriority(RenderPriority.HIGH); mWebView.getSettings().setCacheMode(WebSettings.LOAD_DEFAULT); //设置 缓存模式选择自己想要的模式 // 开启 DOM storage API 功能 mWebView.getSettings().setDomStorageEnabled(true); //开启 database storage API 功能 mWebView.getSettings().setDatabaseEnabled(true); String cacheDirPath = getFilesDir().getAbsolutePath()&#;APP_CACAHE_DIRNAME; //设置数据库缓存路径 mWebView.getSettings().setDatabasePath(cacheDirPath); //设置 Application Caches 缓存目录 mWebView.getSettings().setAppCachePath(cacheDirPath); //开启 Application Caches 功能 mWebView.getSettings().setAppCacheEnabled(true); } /** * 清除WebView缓存 在onDestroy调用这个方法就可以了 */ publicvoid clearWebViewCache(){ //清理Webview缓存数据库 try{ deleteDatabase("webview.db"); deleteDatabase("webviewCache.db"); }catch (Exception e) { e.printStackTrace(); } //WebView 缓存文件 File appCacheDir =new File(getFilesDir().getAbsolutePath()&#;APP_CACAHE_DIRNAME); Log.e(TAG,"appCacheDir path="&#;appCacheDir.getAbsolutePath()); File webviewCacheDir =new File(getCacheDir().getAbsolutePath()&#;"/webviewCache"); Log.e("path===","webviewCacheDir path="&#;webviewCacheDir.getAbsolutePath()); //删除webview 缓存目录 if(webviewCacheDir.exists()){ deleteFile(webviewCacheDir); } //删除webview 缓存 缓存目录 if(appCacheDir.exists()){ deleteFile(appCacheDir); } } /** * 递归删除 文件/文件夹 * * @param file */ publicvoid deleteFile(File file) { Log.i(TAG,"delete file path=" &#; file.getAbsolutePath()); if(file.exists()) { if(file.isFile()) { file.delete(); }else if(file.isDirectory()) { File files[] = file.listFiles(); for(int i = 0; i < files.length; i&#;&#;) { deleteFile(files[i]); } } file.delete(); }else { Log.e("delete===","delete file no exists " &#; file.getAbsolutePath()); } } }

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