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我必须开发一个 android 应用程序。

在这里，我使用了片段概念。

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

<RelativeLayout 

    android:layout_width="match_parent"
    android:layout_height="wrap_content"

    android:orientation="horizontal"

    android:id="@+id/layout"
     >
     <ImageView
        android:id="@+id/pos"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
         android:layout_toLeftOf="@+id/neg"
        android:src="@drawable/a_pos_off" />
      <ImageView
        android:id="@+id/neg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_vertical"
        android:layout_toLeftOf="@+id/imageView5"
        android:src="@drawable/a_neg_off" />



                       </RelativeLayout>

 <LinearLayout 
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/layout"
android:orientation="horizontal" >

 <fragment
  android:id="@+id/activity_main"
  android:name="com.xmlparsing.MainActivity"
  android:layout_width="0px"
  android:layout_height="match_parent"
  android:layout_weight="1" />
 <fragment
  android:id="@+id/fragment2"
  android:name="com.xmlparsing.SubCate"
  android:layout_width="0px"
  android:layout_height="match_parent"
  android:layout_weight="1" />
  </LinearLayout>
  </RelativeLayout>

这里我使用了两个片段..它们是., MainActivity.java 和 SubCate.java

  public class AndroidListFragmentActivity extends Activity {

   /** Called when the activity is first created. */
  @Override
   public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.fragment);
       }}

这里正面图像在 fragment.xml 文件中...如果我必须单击这些正面图像，这意味着必须增加第二个片段（SubCate.java）的全部内容的文本大小...

我能怎么做 ？？？请给我解决这些...

这是我的第二个片段（SubCate.java）代码：

 @TargetApi(Build.VERSION_CODES.HONEYCOMB)
 public class SubCate extends  Fragment
 {
    int count = 0, i, j;
 WebSettings webSettings;
    WebView fullcontent;
     ImageView positive,negative;
    AndroidListFragmentActivity _listDetailsFrag;
    View activityView;

      @Override
  public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);

  }     

    @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, 
    Bundle savedInstanceState) {

    View view = inflater.inflate(R.layout.subcate,
            container, false);



    fullcontent = (WebView) view.findViewById(R.id.fullcontent);

    Bundle bundle = getArguments();
    return view;

        }



       public void updateDetail(String articlefullcontent) {

        _FullContent = articlefullcontent.substring(1);
        fullcontent.setWebChromeClient(new WebChromeClient());
             webSettings = fullcontent.getSettings();


            fullcontent.getSettings();
            fullcontent.loadDataWithBaseURL(null, _FullContent, "text/html", "utf-8", null);

      positive  = ((ImageView )activityView.findViewById(R.id.pos));
             positive.setOnClickListener(new OnClickListener() {


                public void onClick(View v) {
                    count++;

                        if (count == -1)
                        {
                        webSettings.setTextSize(WebSettings.TextSize.SMALLER);
                        positive.setImageResource(R.drawable.a_pos_off);
                        negative.setImageResource(R.drawable.a_neg_on);
                        }
                        else
                            if (count == 0)
                        {
                            webSettings.setTextSize(WebSettings.TextSize.NORMAL);
                            positive.setImageResource(R.drawable.a_pos_off);
                            negative.setImageResource(R.drawable.a_neg_off);
                        }
                        else
                if (count >= 1)
                {   count=1;
                    webSettings.setTextSize(WebSettings.TextSize.LARGER);
                    positive.setImageResource(R.drawable.a_pos_on);
                    negative.setImageResource(R.drawable.a_neg_off);
                }


            } 
            }); 
              }
            }

我必须运行该应用程序并单击该图像视图意味着全文文本不会增加值...我该怎么办？请帮助我并为我提供一些解决方案？？？

4

1 回答 1

3

你的fragment找不到对应的ImageView。编辑到下一个并检查：

positive = (ImageView )getActivity().findViewById(R.id.pos);//use getActivity() Method
于 2013-04-30T04:57:33.707 回答