RadioButton用法

In AndroidManifest.xml宣告如下：

        ....
        <RadioGroup 
            android:orientation="horizontal"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:checkedButton="@+id/horizontalRB"
            android:gravity="center_horizontal"
        >
          <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:text="@string/hor"
            android:textColor="@color/black"
            android:id="@id/horizontalRB"          />
          <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:textColor="@color/black"
            android:text="@string/ver"
            android:id="@+id/verticalRB"          />
        RadioGroup>
         ...

在java程式中取值，用Intent帶值putExtra呼叫其他Activity。

        RadioButton rb1=(RadioButton)findViewById(R.id.horizontalRB);
        RadioButton rb2=(RadioButton)findViewById(R.id.verticalRB);        
 
        Intent intent = new Intent();
        if (rb2.isChecked())
            intent.putExtra("vertical",true);
        else
            intent.putExtra("vertical",false);
 
        intent.setClass(getBaseContext(), main.class);
        startActivity(intent);