ViewPager下碎片访问按钮 [英] Access buttons in Fragments under ViewPager

问题描述

我学习Android的编程和做大量的搜索，但还是没能找到我的问题得到妥善的答案。

I'm learning Android Programming and did lot of search but still could not find a proper answer for my issue.

我在做一个项目，以实现一定数量的下ViewPager页（或片段）。所有的页面有相同的布局与04的按钮。

I'm doing a project to implement a certain number of pages (or Fragments) under a ViewPager. All the pages had same layout with 04 buttons.

我的问题是我不知道放在哪里setOnClickListener的按钮，检查被点击在哪一页哪一个按钮？

My problem is I don't know where to put the setOnClickListener for the buttons to check which button is clicked at which page?

感谢您的任何建议或线索来解决它。

Thanks for any suggestion or clue to solve it.

我的项目样本如下：

MainActivity.java

MainActivity.java

public class MainActivity extends FragmentActivity {

private ViewPager pager;    
private MyPagerAdapter pageAdapter;
private int numPages = 10; //number of pages, could be any number..

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    pager = (ViewPager)findViewById(R.id.pager);
    pageAdapter = new MyPagerAdapter(getSupportFragmentManager());
    pager.setAdapter(pageAdapter);

}


private class MyPagerAdapter extends FragmentStatePagerAdapter {

    public MyPagerAdapter(FragmentManager fm) {
        super(fm);
        // TODO Auto-generated constructor stub
    }

    @Override
    public Fragment getItem(int arg0) {
        // TODO Auto-generated method stub
        return MyFragment.newInstance(arg0);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return numPages;
    }

}

activity_main.xml中

activity_main.xml

<?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:gravity="center_horizontal"
android:orientation="vertical"
android:padding="4dip" >

<android.support.v4.view.ViewPager
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="0px"
    android:layout_weight="1" >
</android.support.v4.view.ViewPager>

MyFragment.java

MyFragment.java

ublic class MyFragment extends Fragment {

private Button btn1;
private Button btn2;
private Button btn3;
private Button btn4;
private TextView currentPage;
public static final String EXTRA_MESSAGE = "EXTRA_MESSAGE";

public static Fragment newInstance(int arg0) {
    // TODO Auto-generated method stub

    MyFragment f = new MyFragment();
    Bundle bdl = new Bundle();
    bdl.putInt(EXTRA_MESSAGE, arg0);
    f.setArguments(bdl);

    return f;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub

    int i = getArguments().getInt(EXTRA_MESSAGE); //for later use

    View v = inflater.inflate(R.layout.fragment_layout, container, false);

    btn1 = (Button)v.findViewById(R.id.button1);
    btn2 = (Button)v.findViewById(R.id.button2);
    btn3 = (Button)v.findViewById(R.id.button3);
    btn4 = (Button)v.findViewById(R.id.button4);

    currentPage = (TextView)v.findViewById(R.id.pagenumber);
    currentPage.setText("Page number #" + i);

    return v;
}

}

fragment_layout.xml

fragment_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/RelativeLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent" >


<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="82dp"
    android:text="Button 1" />

<Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/button1"
    android:layout_below="@+id/button1"
    android:layout_marginTop="40dp"
    android:text="Button 2" />


<Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@id/button2"
    android:layout_below="@id/button2"
    android:layout_centerVertical="true"
    android:layout_marginTop="40dp"
    android:text="Button 3" />

<Button
    android:id="@+id/button4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@id/button3"
    android:layout_below="@id/button3"
    android:layout_marginBottom="98dp"
    android:layout_marginTop="40dp"
    android:text="Button 4" />

<TextView
    android:id="@+id/pagenumber"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="20dp"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

推荐答案

我觉得你可以从页面信息我

I think you can get the page information from i

getArguments（）调用getInt（EXTRA_MESSAGE）

getArguments().getInt(EXTRA_MESSAGE)

，获得按钮实例按钮的信息。添加setOnClickListener每个按钮。例如：

, get button information from button instance. add setOnClickListener for each button. For example:

btn1.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
     Toast.makeText(getApplicationContext(),  "Page:"+i+ " button:1",
     Toast.LENGTH_SHORT).show();

         }
     });

这篇关于ViewPager下碎片访问按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！