動態複選框創建

Question

我想在運行期間在我的android應用程序中動態創建一組複選框。除了按鈕，應用程序什麼都不顯示。我忘了什麼？提前致謝！

public class DataNotificationSurvey extends Activity { 
    private Date timeStamp; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.datanotifylayout); 
     final Button notifySubmitButton = (Button) findViewById(R.id.notifySubmitButton); 
     TableLayout t1 = (TableLayout)findViewById(R.id.notificationTableLayout); 

     for(int i = 0; i < 5; i++) { 
      TableRow tr = new TableRow(this); 
      CheckBox chk = new CheckBox(this); 
      chk.setText(Integer.toString(i)); 
      tr.addView(chk); 
      t1.addView(tr); 
     } 

     notifySubmitButton.setOnClickListener(
       new View.OnClickListener() { 
        @Override 
        public void onClick(View v) { 
         finish(); 
        } 
       }); 
}  

---

//My xml layout, will be changing this later to the one posted below to see if it works. 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    android:id="@+id/notificationLinearLayout" 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 
    <TableLayout 
    android:id="@+id/notificationTableLayout" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
     <TableRow 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"> 

      <Button android:text="Static Button"/> 
     </TableRow> 
    </TableLayout> 
    <Button 
    android:layout_height="wrap_content" 
    android:layout_width="wrap_content" 
    android:id="@+id/notifySubmitButton" 
    android:text="Submit"></Button> 
</LinearLayout> 

Answer 1

這工作對我很好。

public class DynamicTableRowWithCheckBox extends Activity 
{ 
    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    final Button notifySubmitButton = (Button) findViewById(R.id.myButton); 
    TableLayout table = (TableLayout) findViewById(R.id.myTable); 

    for (int i = 0; i < 3; i++) 
    { 
     TableRow row = new TableRow(this); 
     CheckBox chk = new CheckBox(this); 
     chk.setText(Integer.toString(i)); 
     row.addView(chk); 
     table.addView(row); 
    } 

    notifySubmitButton.setOnClickListener(
     new View.OnClickListener() 
     { 
      @Override 
      public void onClick(View v) 
      { 
      finish(); 
      } 
     }); 
    } 
}

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
    <TextView 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:text="@string/hello" /> 
    <Button 
     android:id="@+id/myButton" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Close" /> 
    <TableLayout 
     android:layout_width="wrap_content" 
     android:layout_height="fill_parent" 
     android:id="@+id/myTable" /> 
</LinearLayout>

Answer 2

你的XML更改爲：

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
    android:id="@+id/notificationLinearLayout" 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"> 
    <TableLayout 
     android:id="@+id/notificationTableLayout" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content"> 
     <TableRow> 
      <Button 
       android:text="Static Button" /> 
     </TableRow> 
    </TableLayout> 
    <Button 
     android:layout_height="wrap_content" 
     android:layout_width="wrap_content" 
     android:id="@+id/notifySubmitButton" 
     android:text="Submit"></Button> 
</LinearLayout>

這將刪除你的TableLayout爲wrap_content的layout_height，並刪除高度和你的TableRow的寬度設置，因爲，"The children of a TableRow do not need to specify the layout_width and layout_height attributes in the XML file. TableRow always enforces those values to be respectively MATCH_PARENT and WRAP_CONTENT."