我读了几个地方(here,here或here)关于如何做到这一点,我试图跟着他们,但即时通讯失踪的东西,我不知道是什么。我想从FragmentAlarm发送数据到FragmentHome。下面的代码是我对此的尝试。我试图搞砸了一下。在android中的2个片段之间传递数据而不使用活动?
1)为什么我没有得到任何输出?
2)我也必须通过MainActivity为了在两个片段之间进行通信吗?我试图使用一个公共静态方法结合FragmentStatePagerAdapter来“避免”使用MainActivity。但我不知道这是否可能。
预先感谢
FragmentAlarm
public class FragmentAlarm extends Fragment implements SeekBar.OnSeekBarChangeListener{
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
public FragmentAlarm() { // Required empty public constructor}
public static FragmentAlarm newInstance(String param1, String param2) {
FragmentAlarm fragment = new FragmentAlarm();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
//put any extra arguments that you may want to supply to this fragment
fragment.setArguments(args);
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab_alarm,container,false);
FragmentAlarm.newInstance(ARG_PARAM1,"test from alarm");
FragmentHome.newInstance(ARG_PARAM1,"test from alarm");
return v;
}
@Override
public void onStart() {
super.onStart();
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
System.out.println("mParam1 " + mParam1);
System.out.println("mParam2 " + mParam2);
}
}
}
FragmentHome
public class FragmentHome extends Fragment implements ValuesLoadedListener, SwipeRefreshLayout.OnRefreshListener {
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
private String mParam1;
private String mParam2;
public FragmentHome() {// Required empty public constructor }
// TODO: Rename and change types and number of parameters
public static FragmentHome newInstance(String param1, String param2) {
FragmentHome fragment = new FragmentHome();
Bundle args = new Bundle();
//put any extra arguments that you may want to supply to this fragment
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onStart() {
super.onStart();
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
System.out.println("mParam1 " + mParam1);
System.out.println("mParam2 " + mParam2);
}
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab_home,container,false);
FragmentAlarm.newInstance(ARG_PARAM1,"test from home");
FragmentHome.newInstance(ARG_PARAM1,"test from home");
...
return v;
}
PagerAdapter
public class MyViewPagerAdapter extends FragmentStatePagerAdapter {
private Context context;
int icons[] = {R.drawable.ic_home,
R.drawable.ic_graph,
R.drawable.ic_bell_mid,
R.drawable.ic_settings};
public MyViewPagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
@Override
public Fragment getItem(int position) {
if(position == 0) // if the position is 0 we are returning the First tab
{
return new FragmentHome();
}
else if (position == 1)
{
return new FragmentTrend();
}
else if (position == 2)
{
return new FragmentAlarm();
}
else
{
return new FragmentSetting();
}
}
@Override
public int getCount() {
return 4;
}
public Drawable getIcon(int position)
{
return context.getResources().getDrawable(icons[position]);
}
}
是的,我知道这一点。我说有点因为我尝试了一次尝试,但它似乎并没有工作。你能否把你说的话与我发布的我的代码相关的简单示例代码联系起来?我仍然不知道我是否需要使用活动进行交流。谢谢:) @AAnkit – Celly
你想要哪个选项的例子?如果您使用BR,则必须使用相同的意向操作来发送/接收广播。 – AAnkit
我想知道为什么我的输出仍然为空,即使当我试图通过新实例传递一个文本到片段时,请。感谢您的帮助@AAnkit – Celly