小编joh*_*ann的帖子

我有一个非常简单的RelativeLayout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/frag"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ListView
        android:id="@+id/listApplications"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />

    <!-- AD SERVER -->

    <ImageView
        android:id="@+id/ad_server_picture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="0dp"
        android:contentDescription="@string/ad_banner_image_description"
        android:gravity="bottom|center_horizontal"
        android:paddingBottom="0dp" />

</RelativeLayout>

ImageView与其父级(RelativeLayout)的底部对齐,我将填充/边距设置为0,但我在图像的顶部和底部得到一个白色的"边框"(请参阅​​红色标记):

谢谢 !

如果选择了第一个元素,我想更新ArrayAdapter的值:

public ArrayAdapter<String> adapter;
String[] categoriesArray;    
...

adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, categoriesArray);
list.setAdapter(adapter);

list.setOnItemClickListener(new OnItemClickListener(){
    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        if(arg2== Consts.GAME_CATEGORY_POSITION){

            adapter.clear();

            //Add new values to array
            categoriesArray = new String[subCategories.size()];
            for (int i=0; i<subCategories.size(); i++) {
                categoriesArray[i] = subCategories.get(i).getSub_name();                    
            }           
            adapter.notifyDataSetChanged();             
        }           
    }           
});

但是clear方法(适配器)触发了异常

12-27 09:37:57.376: E/AndroidRuntime(1423): java.lang.UnsupportedOperationException
12-27 09:37:57.376: E/AndroidRuntime(1423):     at java.util.AbstractList.remove(AbstractList.java:638)
12-27 09:37:57.376: E/AndroidRuntime(1423):     at java.util.AbstractList$SimpleListIterator.remove(AbstractList.java:75)
12-27 09:37:57.376: E/AndroidRuntime(1423):     at java.util.AbstractList.removeRange(AbstractList.java:658)
12-27 09:37:57.376: E/AndroidRuntime(1423):     at java.util.AbstractList.clear(AbstractList.java:466)
12-27 …

我想用RSA加密对String进行加密。我的公钥/私钥已生成并存储在DB中。在android中，我使用以下代码：

public static String encryptRSAToString(String text, String strPublicKey) {
    byte[] cipherText = null;
    String strEncryInfoData="";
    try {

    KeyFactory keyFac = KeyFactory.getInstance("RSA");
    KeySpec keySpec = new X509EncodedKeySpec(Base64.decode(strPublicKey.trim().getBytes(), Base64.DEFAULT));
    Key publicKey = keyFac.generatePublic(keySpec);

    // get an RSA cipher object and print the provider
    final Cipher cipher = Cipher.getInstance("RSA");
    // encrypt the plain text using the public key
    cipher.init(Cipher.ENCRYPT_MODE, publicKey);
    cipherText = cipher.doFinal(text.getBytes());
    strEncryInfoData = new String(Base64.encode(cipherText,Base64.DEFAULT));

    } catch (Exception e) {
    e.printStackTrace();
    }
    return strEncryInfoData.replaceAll("(\\r|\\n)", "");
}

出于调试目的，我尝试使用相同的参数调用此方法两次，并且String结果相似（符合预期）。

我想在Java中生成相同的加密字符串。但是，“ android.util.Base64”类在Java中不可用，因此我尝试使用默认的Base64类：

public static …

我的proguard和Gson库有问题.我的代码是

AdServerResult result = (AdServerResult) new Gson().fromJson(json, 
      AdServerResult.class);

(我AdServerResult使用Gson库创建一个新对象)

我的AdServerResult班级:

public class AdServerResult {

    public ArrayList<AdServerObject> shorts ;
    public ArrayList<AdServerObject> longs ;

    public ArrayList<AdServerObject> getShorts() {
        return shorts;
    }
    public void setShorts(ArrayList<AdServerObject> shorts) {
        this.shorts = shorts;
    }
    public ArrayList<AdServerObject> getLongs() {
        return longs;
    }
    public void setLongs(ArrayList<AdServerObject> longs) {
        this.longs = longs;
    }

    //for debug
    @Override
    public String toString(){

        StringBuilder sb = new StringBuilder() ;

        if (shorts!=null && shorts.size()>0){
            for (AdServerObject s: shorts){
                sb.append("url: "+s.getPicture_url()); …