如何将数据从一个滑动选项卡传递到另一个? [英] How to pass data from one swipe tab to another?
问题描述
我需要将两个字符串从第一个选项卡传递到第二个选项卡。虽然我写了这段代码:
I need to pass two string from the first tab to the second tab. Although I wrote this code:
Map map = new Map();
Bundle bundle = new Bundle();
bundle.putString("Position", intent.getStringExtra("Position"));
map.setArguments(bundle);
Toast.makeText(context,"Visualizzare la posizione sulla mappa",Toast.LENGTH_SHORT).show();
在头等舱中,此代码为:
in the first class, and this code:
Bundle args = getArguments();
if(args != null)
{
Toast.makeText(getActivity().getBaseContext(),"Non è null",Toast.LENGTH_SHORT).show();
String pos=args.getString("Position");
String id=args.getString("ID");
}
在第二堂课中,我的应用程序崩溃了。我不明白为什么。
我进行了很多搜索以查找原因,但我不知道该怎么做。
您能告诉我如何将这两个字符串从第一个片段传递到第二个片段吗?
非常感谢
in the second class, my app is crashed. I don't understand why. I searched a lot to found the reason but I don't understand how I can do. Could you tell me how could I pass this two strings from the first fragment to the second fragment? Thanks a lot
推荐答案
要在片段之间进行通信,必须遵循以下过程:
-您必须定义片段和父级活动之间的接口通信器,然后通过bundle中的设置参数传递数据。
For communicating between fragments you must follow this process : - you must define interface communicator between fragment and parent activity and then pass your data by set arguments in bundle .
要定义片段之间的接口通信器: http://developer.android.com/training/basics/fragments/communicating.html
To define interface communicator between fragments: http://developer.android.com/training/basics/fragments/communicating.html
设置参数:
Fragment fragment = new Fragment();
final Bundle bundle = new Bundle();
bundle.putString("data", data);
Log.i("BUNDLE", bundle.toString());
fragment.setArguments(bundle);
以下是该过程:FragmentA --Data-> FragmentActivity --Data-> FragmentB
Here is the process : FragmentA --Data--> FragmentActivity --Data--> FragmentB
1-从片段定义接口通讯器回调
1 - Define interface communicator callback from fragment
interface communicate {
public void sendData(String data);
}
2-在父级活动中实施此通信器
2 - in parent activity implement this communiactor
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
public class MainActivity extends FragmentActivity implements communicate{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void sendData(String data) {
// TODO Auto-generated method stub
// From fragments we can call this method with the help of reference of communicate.
}
}
3-在第一个子段中,我们必须从创建的活动中获取communiactor的实例:
3 - In first fragment child ,we must get the instance of communiactor from on activity created :
public class FragmentA extends Fragment implements OnClickListener{
Button button;
communicate cm;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.layout_fragmenta, container, false);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
**cm = (communicate) getActivity();**
button = (Button) getActivity().findViewById(R.id.button1);
button.setOnClickListener(this);
}
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
cm.sendData();
}
}
4-在您的父母活动中从方法sendData获取数据并将数据通过Bundle传递给fragmentB:
4 - in your parent activity you get your data from methode sendData and pass data to fragmentB via Bundle :
@Override
public void sendData(String data) {
// TODO Auto-generated method stub
Fragment fragment = new Fragment();
final Bundle bundle = new Bundle();
bundle.putString("data", data);
Log.i("BUNDLE", bundle.toString());
fragment.setArguments(bundle);
}
5-最终;通过获取参数方法从FragmentB获取数据:
5 - finally ; get your data from FragmentB by get arguments methods :
公共类ExampleFragment扩展了Fragment
{
public class ExampleFragment extends Fragment {
public static FragmentB newInstance()
{
FragmentB fragment = new FragmentB();
// arguments
Bundle arguments = new Bundle();
arguments.putString(ARGUMENT_PRODUCT_ID, productId);
fragment.setArguments(arguments);
return fragment;
}
public FragmentB() {}
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// handle fragment arguments
Bundle arguments = getArguments();
if(arguments != null)
{
}
}
}
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