使用LayoutInflate（视图扩充器）

使用fragment遇到一个奇怪的问题：

09-02 01:08:48.885: E/AndroidRuntime(12216): FATAL EXCEPTION: main
09-02 01:08:48.885: E/AndroidRuntime(12216): Process: com.astuetz.viewpager.extensions.sample, PID: 12216
09-02 01:08:48.885: E/AndroidRuntime(12216): java.lang.StackOverflowError
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.widget.TextView.jumpDrawablesToCurrentState(TextView.java:4789)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5488)
09-02 01:08:48.885: E/AndroidRuntime(12216): at android.view.ViewGroup.jumpDrawablesToCurrentState(ViewGroup.java:5

很奇怪，很奇怪，经过各种不服，原来错在这里：

@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View view = inflater.inflate(R.layout.fragment_text, container);//错误代码Log.d("测试", container+" ");return view;}

此处正确写法：

View view = inflater.inflate(R.layout.fragment_text, container,false);
或
View view = inflater.inflate(R.layout.fragment_text, null,false);

第一个参数，布局文件，需要扩建成view的xml文件，第二个参数，view的根view（root），第三个参数，是否将该view依附到根view上。

此处通过解析xml布局文件生成view，这个view就没有什么根view，没有什么parent，它本身就是根view，所以不需要依附到哪个地方，依附到container当然就崩溃了。

于是知道此处：
View view = inflater.inflate(R.layout.fragment_text, container);
等同于
View view = inflater.inflate(R.layout.fragment_text, container,true);

但是，我奇怪的是，不知什么原因，大概是此错误写法与第三方库搅合在一起，还报了这么个奇怪的红：

exception>>>>>>> The specified child already has a parent. You must call removeView() on the child's parent first.

这是，通过xml创建出来的view已经依附到了一个parent或根view了，再次parent.addView(view)导致的异常抛出。

抛出的源码为：

 private void addViewInner(View child, int index, LayoutParams params,            boolean preventRequestLayout) {        if (child.getParent() != null) {            throw new IllegalStateException("The specified child already has a parent. " +                    "You must call removeView() on the child's parent first.");        }      }