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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settings.vpn;
     18 
     19 import com.android.settings.R;
     20 
     21 import android.app.AlertDialog;
     22 import android.content.Context;
     23 import android.content.DialogInterface;
     24 import android.widget.Toast;
     25 
     26 import java.io.File;
     27 import java.io.FileInputStream;
     28 import java.io.FileOutputStream;
     29 import java.io.IOException;
     30 import java.io.InputStream;
     31 import java.io.OutputStream;
     32 
     33 class Util {
     34 
     35     static void showShortToastMessage(Context context, String message) {
     36         Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
     37     }
     38 
     39     static void showShortToastMessage(Context context, int messageId) {
     40         Toast.makeText(context, messageId, Toast.LENGTH_SHORT).show();
     41     }
     42 
     43     static void showLongToastMessage(Context context, String message) {
     44         Toast.makeText(context, message, Toast.LENGTH_LONG).show();
     45     }
     46 
     47     static void showLongToastMessage(Context context, int messageId) {
     48         Toast.makeText(context, messageId, Toast.LENGTH_LONG).show();
     49     }
     50 
     51     static void showErrorMessage(Context c, String message) {
     52         createErrorDialog(c, message, null).show();
     53     }
     54 
     55     static void showErrorMessage(Context c, String message,
     56             DialogInterface.OnClickListener listener) {
     57         createErrorDialog(c, message, listener).show();
     58     }
     59 
     60     static void deleteFile(String path) {
     61         deleteFile(new File(path));
     62     }
     63 
     64     static void deleteFile(String path, boolean toDeleteSelf) {
     65         deleteFile(new File(path), toDeleteSelf);
     66     }
     67 
     68     static void deleteFile(File f) {
     69         deleteFile(f, true);
     70     }
     71 
     72     static void deleteFile(File f, boolean toDeleteSelf) {
     73         if (f.isDirectory()) {
     74             for (File child : f.listFiles()) deleteFile(child, true);
     75         }
     76         if (toDeleteSelf) f.delete();
     77     }
     78 
     79     static boolean isFileOrEmptyDirectory(String path) {
     80         File f = new File(path);
     81         if (!f.isDirectory()) return true;
     82 
     83         String[] list = f.list();
     84         return ((list == null) || (list.length == 0));
     85     }
     86 
     87     static boolean copyFiles(String sourcePath , String targetPath)
     88             throws IOException {
     89         return copyFiles(new File(sourcePath), new File(targetPath));
     90     }
     91 
     92     // returns false if sourceLocation is the same as the targetLocation
     93     static boolean copyFiles(File sourceLocation , File targetLocation)
     94             throws IOException {
     95         if (sourceLocation.equals(targetLocation)) return false;
     96 
     97         if (sourceLocation.isDirectory()) {
     98             if (!targetLocation.exists()) {
     99                 targetLocation.mkdir();
    100             }
    101             String[] children = sourceLocation.list();
    102             for (int i=0; i<children.length; i++) {
    103                 copyFiles(new File(sourceLocation, children[i]),
    104                         new File(targetLocation, children[i]));
    105             }
    106         } else if (sourceLocation.exists()) {
    107             InputStream in = new FileInputStream(sourceLocation);
    108             OutputStream out = new FileOutputStream(targetLocation);
    109 
    110             // Copy the bits from instream to outstream
    111             byte[] buf = new byte[1024];
    112             int len;
    113             while ((len = in.read(buf)) > 0) {
    114                 out.write(buf, 0, len);
    115             }
    116             in.close();
    117             out.close();
    118         }
    119         return true;
    120     }
    121 
    122     private static AlertDialog createErrorDialog(Context c, String message,
    123             DialogInterface.OnClickListener okListener) {
    124         AlertDialog.Builder b = new AlertDialog.Builder(c)
    125                 .setTitle(android.R.string.dialog_alert_title)
    126                 .setIcon(android.R.drawable.ic_dialog_alert)
    127                 .setMessage(message);
    128         if (okListener != null) {
    129             b.setPositiveButton(R.string.vpn_back_button, okListener);
    130         } else {
    131             b.setPositiveButton(android.R.string.ok, null);
    132         }
    133         return b.create();
    134     }
    135 
    136     private Util() {
    137     }
    138 }
    139