安卓動態增加按鈕

首先瞭解一下LayouInflater類：將一個layout xml檔案執行個體化為相應的View 對象。他永遠不會直接使用，而是使用 getLayoutInflater() 或者 getSystemService(String) 來獲得標準的LayoutInflater執行個體，這個執行個體已經將context串連起來，為正在啟動並執行裝置配置正確。比如：[java] view plaincopyLayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  public View inflate (int resource, ViewGroup root)Since: API Level 1Inflate a new view hierarchy from the specified xml resource. Throws InflateException if there is an error.Parametersresource     ID for an XML layout resource to load (e.g., R.layout.main_page) root     Optional view to be the parent of the generated hierarchy.ReturnsThe root View of the inflated hierarchy. If root was supplied, this is the root View; otherwise it is the root of the inflated XML file.假如有一個這樣的xml檔案(guess_button.xml) 放入到一個buttonTableLayout：[html] view plaincopy<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="match_parent"      android:layout_height="match_parent"      android:orientation="vertical" >        <Button          android:id="@+id/newGuessButton"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_weight="1" />  </LinearLayout>   (guess_button.xml)[html] view plaincopy<TableLayout         android:id="@+id/buttonTableLayout"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:layout_weight="1"         android:stretchColumns="0,1,2" >             <TableRow             android:id="@+id/tableRow0"             android:layout_width="match_parent"             android:layout_height="wrap_content"              android:orientation="horizontal">           </TableRow>             <TableRow             android:id="@+id/tableRow1"             android:layout_width="match_parent"             android:layout_height="wrap_content"              android:orientation="horizontal">           </TableRow>             <TableRow             android:id="@+id/tableRow2"             android:layout_width="match_parent"             android:layout_height="wrap_content"              android:orientation="horizontal">           </TableRow>     </TableLayout>  (main.xml中定義的需要被擴充的buttonTableLayout,假設其在程式中的引用也叫buttonTableLayout, 即buttonTableLayout =(TableLayout)  findViewById(R.id.buttonLayout);)現在我們將其第一行進行擴充：[java] view plaincopyLayoutInflater inflater = (LayoutInflater)context.getSystemService (Context.LAYOUT_INFLATER_SERVICE);  Button newGuessButton =(Button)inflater.inflater(R.layout.guess_button,null); //獲得按鈕  newGuessButton.setText("abc"); //設定按鈕文本  newGuessButton.setOnClickListener(guessButtonListener); //設定Listener  (TableRow) buttonTableLayout.getChildAt(1);  //將newGuessButton加到table第一行  OK 整個流程就完成了