android中使用webview之后对缓存的删除

管理类

public class Cache_manager extends AppCompatActivity {
    //设置的缓存目录
    private static final String APP_CACAHE_DIRNAME = "/webcache";
    private static final String TAG = My_account_activity.class.getSimpleName();

    public void 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(TAG, "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
     */
    public void 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(TAG, "delete file no exists " + file.getAbsolutePath());
        }
    }
}public class Cache_manager extends AppCom