问题
In my code I have a custom cache directory set to the sdCard and I point the 'WebView.getSettings().setAppCachePath("")' to this path but the OS sends the cache to the default cache (/data/data/com.your.package.appname/cache). The custom directory is being created correctly where it should be, but the data doesn't get into it. The reason I am using a custom directory is the cache's will be large and temporary so I need the user to be able to delete specific caches.
Am I missing something here? Any help, code, or suggestions will be appreciated as always.
Thank-you.
public class DocumentView extends Activity {
/**
* -- Called when the activity is first created.
* ================================================
**/
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String l = getIntent().getStringExtra("LABEL");
CreateCacheDirectory();
/**
* -- Set up the WebView
* ========================================================
**/
final String url = getIntent().getStringExtra("url");// get url that
// passed from
// previous
// Activity
mWebView = (WebView) findViewById(R.id.webView1);
mWebView.getSettings().setDomStorageEnabled(true);
// Set cache size to 8 mb by default. should be more than enough
mWebView.getSettings().setAppCacheMaxSize(1024 * 1024 * 8);
// The DEFAULT location for the cache
mWebView.getSettings().setAppCachePath(extStorageDirectory
+ "/myCompany/myApp/cache/" + l);
mWebView.getSettings().setAllowFileAccess(true);
mWebView.getSettings().setAppCacheEnabled(true);
mWebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
mWebView.loadUrl(url);
mWebView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
activity.setProgress(progress * 100);
pd.show();
if (progress == 100)
pd.dismiss();
}
@Override
public void onReachedMaxAppCacheSize(long spaceNeeded,
long totalUsedQuota, WebStorage.QuotaUpdater quotaUpdater) {
quotaUpdater.updateQuota(spaceNeeded * 2);
}
});
mWebView.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
// The redirect
if (url.equals(failingUrl)) {
// error.html is the place we are redirected to by the
// server if we are online
mWebView.loadUrl("http:www.aero-technologies.us/error.html");
return;
} else if (url.equals(failingUrl)) { // The cache failed – We
// don't have an offline
// version to show
// This code removes the ugly android's "can't open page"
// and simply shows a dialog stating we have no network
view.loadData("", "text/html", "UTF-8");
// TODO -->showDialog(DIALOG_NONETWORK);
}
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
});
public void CreateCacheDirectory() {
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)) {
String l = getIntent().getStringExtra("LABEL");
extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File cacheDirectory = new File(extStorageDirectory
+ "/myCompany/myApp/cache/" + l);// Create a Folder object
// for the parent
// directory
cacheDirectory.mkdirs();// Have the object build the folder
// if needed.
} else if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED_READ_ONLY)) {
Alerts.sdCardMissing(this);
}
}
回答1:
From what I could tell by reading the WebSettings code, the cache configuration on WebSettings is only for HTML5 apps:
http://www.grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.3.3_r1/android/webkit/WebSettings.java#181
回答2:
This is Chromium bug 245549 which was fixed in end-November 2014 so probably affects all versions of Android below 6.0 (API 23).
来源:https://stackoverflow.com/questions/6206481/webview-cache-data-directory