android中的简单单选按钮操作
我正在尝试制作一组RadioButtons <{1}} <{1}} onclick button
- 有两组单选按钮
- 直到我点击选择日期，必须显示按钮组
隐形
- 当我点击selectdays然后它们必须是可见的
我尝试了什么::
- 我已经设置了整个设置
- 但不知道如何实现我上面提到的行动
buffet_offerings_breakfast_menu2.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="4dp"
android:paddingRight="4dp"
android:paddingTop="10dp"
android:id="@+id/ChangeBreakfastFragment">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="140dp"
android:background="@drawable/frame_background_for_rounded_corners_white_bkg" >
<ImageView
android:id="@+id/image1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/image_view_background_white_background"
android:padding="10dp" />
<LinearLayout
android:id="@+id/linearLayout_lunch_first_row_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<Button
android:id="@+id/lunch_button_id"
android:layout_width="97dp"
android:layout_height="wrap_content"
android:background="@drawable/green_button_rounded_corners_buffetofferings"
android:text="Breakfast" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/lunch_from_textview_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/image1"
android:layout_toRightOf="@+id/lunch_button_id"
android:gravity="center"
android:paddingLeft="30dp"
android:text="From"
android:textColor="#000000"
android:textSize="15sp" />
<EditText
android:id="@+id/from_lunch_edit_text_id"
android:layout_width="55dp"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/lunch_to_textview_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/lunch_button_id"
android:layout_toRightOf="@+id/textView1"
android:gravity="center"
android:text="To"
android:textColor="#000000"
android:textSize="15sp" />
<requestFocus />
<EditText
android:id="@+id/to_lunch_edit_text_id"
android:layout_width="55dp"
android:layout_height="wrap_content"
android:ems="10" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout_type_of_days"
android:layout_width="wrap_content"
android:layout_height="36dp"
android:layout_below="@+id/linearLayout_lunch_first_row_id"
android:gravity="center|top"
android:orientation="horizontal"
android:paddingLeft="5dp"
android:paddingTop="10dp" >
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/BreakfastRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:checked="true"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Weekdays"
android:textSize="15dp" />
<RadioButton
android:id="@+id/LunchRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Weekends"
android:textSize="15dp" />
<RadioButton
android:id="@+id/DinnerRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Select Days"
android:textSize="15dp" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:id="@+id/linearLayout_individualdays"
android:layout_width="wrap_content"
android:layout_height="36dp"
android:layout_below="@+id/linearLayout_type_of_days"
android:gravity="center|top"
android:orientation="horizontal"
android:paddingLeft="5dp"
android:paddingTop="10dp" >
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="horizontal" >
<RadioButton
android:id="@+id/BreakfastRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:checked="true"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Mon"
android:textSize="15dp" />
<RadioButton
android:id="@+id/LunchRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Tue"
android:textSize="15dp" />
<RadioButton
android:id="@+id/DinnerRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Wed"
android:textSize="15dp" />
<RadioButton
android:id="@+id/BreakfastRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:checked="true"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Thu"
android:textSize="15dp" />
<RadioButton
android:id="@+id/LunchRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Fri"
android:textSize="15dp" />
<RadioButton
android:id="@+id/DinnerRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Sat"
android:textSize="15dp" />
<RadioButton
android:id="@+id/DinnerRG_ID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="2dp"
android:layout_weight=".5"
android:background="@drawable/yourbuttonbackground"
android:button="@android:color/transparent"
android:gravity="center_horizontal"
android:padding="5dp"
android:text="Sun"
android:textSize="15dp" />
</RadioGroup>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
BuffetOfferings_MainFragmentActivity.java
public class BuffetOfferings_MainFragmentActivity extends FragmentActivity{
FragmentManager manager;
FragmentTransaction transaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.buffet_offerings_fragment_main_reference);
Buffet_offerings_breakfast_menu1 breakfast_fragment=new Buffet_offerings_breakfast_menu1();
Buffet_offerings_lunch_menu1 lunch_fragment=new Buffet_offerings_lunch_menu1();
Buffet_offerings_dinner_menu1 dinner_fragment=new Buffet_offerings_dinner_menu1();
manager=getSupportFragmentManager();
transaction=manager.beginTransaction();
transaction.add(R.id.BREAKFAST_LAYOUT_ID,breakfast_fragment, "breakfast_menu1_fragment");
transaction.add(R.id.LUNCH_LAYOUT_ID,lunch_fragment, "lunch_menu1_fragment");
transaction.add(R.id.DINNER_LAYOUT_ID,dinner_fragment, "dinner_menu1_fragment");
transaction.commit();
}
public void BreakfastRedMenu1(View V){
Buffet_offerings_breakfast_menu2 breakfast_fragment1=new Buffet_offerings_breakfast_menu2();
transaction=manager.beginTransaction();
transaction.replace(R.id.BREAKFAST_LAYOUT_ID, breakfast_fragment1, "Tag1");
transaction.commit();
}
public void LunchRedMenu1(View V){
Buffet_offerings_lunch_menu2 lunch_fragment1=new Buffet_offerings_lunch_menu2();
transaction=manager.beginTransaction();
transaction.replace(R.id.LUNCH_LAYOUT_ID, lunch_fragment1, "Tag2");
transaction.commit();
}
public void DinnerRedMenu1(View V){
Buffet_offerings_dinner_menu2 dinner_fragment1=new Buffet_offerings_dinner_menu2();
transaction=manager.beginTransaction();
transaction.replace(R.id.DINNER_LAYOUT_ID, dinner_fragment1, "Tag3");
transaction.commit();
}
}
Buffet_offerings_breakfast_menu2.java
public class Buffet_offerings_breakfast_menu2 extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.buffet_offerings_breakfast_menu2, container, false);
return view;
}
}
编辑后
Buffet_offerings_breakfast_menu2.java
public class Buffet_offerings_breakfast_menu2 extends Fragment{
RadioGroup radioGroup;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View view=inflater.inflate(R.layout.buffet_offerings_breakfast_menu2, container, false);
radioGroup = (RadioGroup) getActivity().findViewById(R.id.radioGroup1);
radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener(){
public void onCheckedChanged(RadioGroup group, int checkedId) {
// checkedId is the RadioButton selected
if(checkedId == R.id.DinnerRG_ID)
{
getActivity().findViewById(R.id.radioGroup2).setVisibility(View.VISIBLE);
}
}
});
return view;
}
}
记录 ::
11-15 11:43:02.391: E/AndroidRuntime(311): FATAL EXCEPTION: main
11-15 11:43:02.391: E/AndroidRuntime(311): java.lang.NullPointerException
11-15 11:43:02.391: E/AndroidRuntime(311): at com.project.findmybuffet.Buffet_offerings_breakfast_menu2.onCreateView(Buffet_offerings_breakfast_menu2.java:25)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1460)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:911)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:429)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.os.Handler.handleCallback(Handler.java:587)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.os.Handler.dispatchMessage(Handler.java:92)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.os.Looper.loop(Looper.java:123)
11-15 11:43:02.391: E/AndroidRuntime(311): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-15 11:43:02.391: E/AndroidRuntime(311): at java.lang.reflect.Method.invokeNative(Native Method)
11-15 11:43:02.391: E/AndroidRuntime(311): at java.lang.reflect.Method.invoke(Method.java:521)
11-15 11:43:02.391: E/AndroidRuntime(311): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-15 11:43:02.391: E/AndroidRuntime(311): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-15 11:43:02.391: E/AndroidRuntime(311): at dalvik.system.NativeStart.main(Native Method)
1 个答案:
答案 0 :(得分：1)
获取ID，
view.findViewById(...);
原始答案：
在XML布局中：
- 将第二个广播组的名称更改为 radioGroup2 。
- 现在让我们通过添加以下内容使第二个radioGroup不可见： android：visibility =“gone”
现在，如果您运行该应用程序，您将只获得第一行内容。现在让我们添加代码，以便在收听selectDays点击时显示单选按钮：
-
在片段onCreateView（）中：
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup); radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener(){ public void onCheckedChanged(RadioGroup group, int checkedId) { // checkedId is the RadioButton selected if(checkedId == R.id.**#**){ findViewById(R.id.radioGroup2).setVisibility(View.visible); } } });
注意：
- 必须为所有xml视图提供唯一ID，以便我们可以在运行时访问它们。
- ＃是selectDays radioButton的ID。
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