如果我们手机有root的权限的话，就可以看到/data/data/package_name/下的文件目录，我们就会发现webview为我们创建
app_webview，这个应该就是webview的缓存目录的位置。
public void initWebView() {
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setRenderPriority(RenderPriority.HIGH);
// 建议缓存策略为，判断是否有网络，有的话，使用LOAD_DEFAULT,无网络时，使用LOAD_CACHE_ELSE_NETWORK
mWebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK); // 设置缓存模式
// 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_CA
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【/doc/DSkNLaERkbnFoS0ZF】 完整内容开源分享
CHE_DIRNAME;
Log.i(“cachePath”, cacheDirPath);
// 设置数据库缓存路径
mWebView.getSettings().setDatabasePath(cacheDirPath); // API 19 deprecated
// 设置Application caches缓存目录
mWebView.getSettings().setAppCachePath(cacheDirPath);
// 开启Application Cache功能
mWebView.getSettings().setAppCacheEnabled(true);
Log.i(“databasepath”, mWebView.getSettings().getDatabasePath());
}
这里加载我博客里的一篇文章：
public void findView() {
initWebView();
mWebView.setWebViewClient(new WebViewClient() {
@Override
public void onLoadResource(WebView view, String url) {
Log.i(TAG, “onLoadResource url=” + url);
super.onLoadResource(view, url);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.i(TAG, “intercept url=” + url);
view.loadUrl(url);
return true;
}
// 页面开始时调用
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.e(TAG, “onPageStarted”);
super.onPageStarted(view, url, favicon);
}
// 页面加载完成调用
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toast.makeText(getApplicationContext(), “”, Toast.LENGTH_LONG)
.show();
}
});
mWebView.setWebChromeClient(new WebChromeClient() {
@Override
public boolean onJsAlert(WebView view, String url, String message,
JsResult result) {
Log.e(TAG, "onJsAlert " + message);
Toast.makeText(getApplicationContext(), message,
Toast.LENGTH_SHORT).show();
result.confirm();
return super.onJsAlert(view, url, message, result);
}
@Override
public boolean onJsConfirm(WebView view, String url,
String message, JsResult result) {
Log.e(TAG, "onJsConfirm " + message);
return super.onJsConfirm(view, url, message, result);
}
@Override
public boolean onJsPrompt(WebView view, String url, String message,
String defaultValue, JsPromptResult result) {
Log.e(TAG, "onJsPrompt " + url);
return super.onJsPrompt(view, url, message, defaultValue,
result);
}
});
mWebView.loadUrl(url);
}
完整代码
package com.infzm.webview;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import .Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
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.Button;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
private WebView mWebView;
private Button nightModeBtn;
private Button lightModeBtn;
// -----
private static final String TAG = MainActivity.class.getSimpleName();
private static final String APP_CACHE_DIRNAME = “/webcache”; // web缓存目录
private String url; // 网页url
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mWebView = (WebView) this.findViewById(R.id.webview);
nightModeBtn = (Button) this.findViewById(R.id.btn_nightmode);
lightModeBtn = (Button) this.findViewById(R.id.btn_lightmode);
nightModeBtn.setOnClickListener(this);
lightModeBtn.setOnClickListener(this);
// webView.loadUrl(“”);
WebSettings settings = mWebView.getSettings();
// 设置javaScript可用
settings.setJavaScriptEnabled(true);
// 绑定javaScript接口，可以实现在javaScript中调用我们的Android代码
// webView.addJavascriptInterface(new WebAppInterface(this), “Android”);
// webView.setWebViewClient(new MyWebViewClient());
// 加载assets目录下的html页面
// mWebView.loadUrl(“file:///android_asset/01.html”);
url = “/wwj_748/article/details/44810283”;
findView();
}
public void findView() {
initWebView();
mWebView.setWebViewClient(new WebViewClient() {
@Override
public void onLoadResource(WebView view, String url) {
Log.i(TAG, “onLoadResource url=” + url);
super.onLoadResource(view, url);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Log.i(TAG, “intercept url=” + url);
view.loadUrl(url);
return true;
}
// 页面开始时调用
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
Log.e(TAG, “onPageStarted”);
super.onPageStarted(view, url, favicon);
}
// 页面加载完成调用
@Override
public void onPageFinished(WebView view, String url) {
super.onPageFinished(view, url);
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toast.makeText(getApplicationContext(), “”, Toast.LENGTH_LONG)
.show();
}
});
mWebView.setWebChromeClient(new WebChromeClient() {
@Override
public boolean onJsAlert(WebView view, String url, String message,
JsResult result) {
Log.e(TAG, "onJsAlert " + message);
Toast.makeText(getApplicationContext(), message,
Toast.LENGTH_SHORT).show();
result.confirm();
return super.onJsAlert(view, url, message, result);
}
@Override
public boolean onJsConfirm(WebView view, String url,
String message, JsResult result) {
Log.e(TAG, "onJsConfirm " + message);
return super.onJsConfirm(view, url, message, result);
}
@Override
public boolean onJsPrompt(WebView view, String url, String message,
String defaultValue, JsPromptResult result) {
Log.e(TAG, "onJsPrompt " + url);
return super.onJsPrompt(view, url, message, defaultValue,
result);
}
});
mWebView.loadUrl(url);
}
public void initWebView() {
mWebView.getSettings().setJavaScriptEnabled(true);
mWebView.getSettings().setRenderPriority(RenderPriority.HIGH);
// 建议缓存策略为，判断是否有网络，有的话，使用LOAD_DEFAULT,无网络时，使用LOAD_CACHE_ELSE_NETWORK
mWebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK); // 设置缓存模式
// 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_CACHE_DIRNAME;
Log.i(“cachePath”, cacheDirPath);
// 设置数据库缓存路径
mWebView.getSettings().setDatabasePath(cacheDirPath); // API 19 deprecated
// 设置Application caches缓存目录
mWebView.getSettings().setAppCachePath(cacheDirPath);
// 开启Application Cache功能
mWebView.getSettings().setAppCacheEnabled(true);
Log.i(“databasepath”, mWebView.getSettings().getDatabasePath());
}
public void clearWebViewCache() {
// 清理WebView缓存数据库
try {
deleteDatabase(“webview.db”);
deleteDatabase(“webviewCache.db”);
} catch (Exception e) {
e.printStackTrace();
}
