Android 向tabhost动态添加控件时出现问题

Android 向tabhost动态添加控件时出现问题,android,android-tabhost,Android,Android Tabhost,我试图将控件动态添加到托管在选项卡控件内的表布局中。虽然代码运行时没有抛出任何错误,但新添加的控件不会出现。如果您查看一下代码,并告诉我哪一步不正确,我将不胜感激 代码生成如下: <?xml version="1.0" encoding="utf-8"?> <TabHost xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/tabhost" andro

我试图将控件动态添加到托管在选项卡控件内的表布局中。虽然代码运行时没有抛出任何错误,但新添加的控件不会出现。如果您查看一下代码,并告诉我哪一步不正确,我将不胜感激

代码生成如下:

<?xml version="1.0" encoding="utf-8"?>
<TabHost
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@android:id/tabhost"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="5dp">
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:padding="5dp" >
            <TableLayout
              android:id ="@+id/aTableLayout"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">              
            </TableLayout>
            <TableLayout
              android:id="@+id/anotherTableLayout"           
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">              
            </TableLayout>          
        </FrameLayout>        
 </LinearLayout>  
</TabHost>

package bajaj.dinesh.tablayout.test;

import bajaj.dinesh.tablayout.test.R;
import android.app.Activity;
import android.app.TabActivity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.TabHost;
import android.widget.TableLayout;
import android.widget.TableRow;

public class TabLayoutTest extends TabActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        TabHost tabHost = getTabHost();
        TabHost.TabSpec spec; 

        // Initialize a TabSpec for each tab and add it to the TabHost
        spec = tabHost.newTabSpec("tag1").setIndicator("Tag 1")
                      .setContent(R.id.aTableLayout);
        tabHost.addTab(spec); //Tag 1

        spec = tabHost.newTabSpec("tag2").setIndicator("Tag 2")
        .setContent(R.id.anotherTableLayout);
        tabHost.addTab(spec); //Tag 2  

        FrameLayout frameLayout = tabHost.getTabContentView();
        TableLayout tableLayout = (TableLayout)frameLayout.findViewById(R.id.aTableLayout);

       /* Create a new row to be added. */
        TableRow tableRow = new TableRow(this);
         /* Create a Button to be the row-content. */
         Button button = new Button(this);
         button.setText("Dynamic Button");
         button.setLayoutParams(new LayoutParams(
                      LayoutParams.FILL_PARENT,
                      LayoutParams.WRAP_CONTENT));
          /* Add Button to row. */
          tableRow.addView(button);
         /* Add row to TableLayout. */
         tableLayout.addView(tableRow,new TableLayout.LayoutParams(
                LayoutParams.FILL_PARENT,
                LayoutParams.WRAP_CONTENT));

    } // end of definition of onCreate method
} // end of definition of TabLayoutTest class

包bajaj.dinesh.tablayout.test;
导入bajaj.dinesh.tablayout.test.R;
导入android.app.Activity;
导入android.app.TabActivity;
导入android.os.Bundle;
导入android.view.ViewGroup.LayoutParams;
导入android.widget.Button;
导入android.widget.FrameLayout;
导入android.widget.TabHost;
导入android.widget.TableLayout;
导入android.widget.TableRow;
公共类TabLayoutTest扩展了TabActivity{
/**在首次创建活动时调用*/
@凌驾
创建时的公共void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TabHost TabHost=getTabHost();
TabHost.TabSpec;
//为每个选项卡初始化TabSpec并将其添加到TabHost
spec=tabHost.newTabSpec(“tag1”).setIndicator(“tag1”)
.setContent(R.id.atablellayout);
tabHost.addTab(spec);//标记1
spec=tabHost.newTabSpec(“tag2”).setIndicator(“tag2”)
.setContent(R.id.anotherTableLayout);
tabHost.addTab(spec);//标记2
FrameLayout=tabHost.getTabContentView();
TableLayout=(TableLayout)frameLayout.findViewById(R.id.atablellayout);
/*创建要添加的新行*/
TableRow TableRow=新的TableRow(本);
/*创建一个按钮作为行内容*/
按钮按钮=新按钮(此按钮);
按钮.setText(“动态按钮”);
按钮。setLayoutParams(新的LayoutParams(
LayoutParams.FILL\u父级,
LayoutParams.WRAP_内容);
/*将按钮添加到行*/
tableRow.addView(按钮);
/*将行添加到TableLayout*/
tableLayout.addView(tableRow,新建tableLayout.LayoutParams(
LayoutParams.FILL\u父级,
LayoutParams.WRAP_内容);
}//onCreate方法的定义结束
}//TabLayoutTest类的定义结束

我没有得到任何回复!嗯,我已经想出了解决办法。解决方案是,在将控件添加到TableRow时,我需要使用TableRow.LayoutParams而不是ViewGroup.LayoutParams

button.setLayoutParams(new TableRow.LayoutParams(
                      LayoutParams.FILL_PARENT,
                      LayoutParams.WRAP_CONTENT));

我没有得到任何回复!嗯,我已经想出了解决办法。解决方案是,在将控件添加到TableRow时,我需要使用TableRow.LayoutParams而不是ViewGroup.LayoutParams

button.setLayoutParams(new TableRow.LayoutParams(
                      LayoutParams.FILL_PARENT,
                      LayoutParams.WRAP_CONTENT));

嗨,这个问题很难回答吗?如果缺少什么,请告诉我,以便我能提供。谢谢。嗨,这个问题很难回答吗?如果缺少什么,请告诉我,以便我能提供。谢谢