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我正在嘗試學習android，並且遇到了此項目的問題。我已經建立了一個帶有四個片段的片段選項卡主機。我想要做的是將前三個片段與用戶交互，當他們切換到第四個選項卡時，它將顯示前三個片段中的所有信息。我想我可以將onPause（）的信息覆蓋作爲觸發器，因爲我不想使用按鈕按鈕。現在，我只是想讓EditText工作，以確保我做的一切都正確。我不確定是否正確使用片段事務，或者我試圖收集編輯文本字段的方式。稍後我希望通過一個包來傳遞信息。任何幫助，將不勝感激。如何在FragmentTabHost的片段之間傳遞數據？
主營：
package valdes.fragmenttabsmenu;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTabHost;
import android.app.FragmentTransaction;
public class MainActivity extends FragmentActivity implements WelcomeFragment.WelcomeListener {
private FragmentTabHost mTabHost;
private String firstName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTabHost = (FragmentTabHost) findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);
mTabHost.addTab(mTabHost.newTabSpec("Home").setIndicator("Home", null), WelcomeFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("Demographics").setIndicator("Demographics", null), DemographicsFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("Questions").setIndicator("Questions", null), QuestionsFragment.class, null);
mTabHost.addTab(mTabHost.newTabSpec("Overview").setIndicator("Overview", null), OverviewFragment.class, null);
}
@Override
public void getFristName(String first_Name){
firstName = first_Name;
OverviewFragment fragment = new OverviewFragment();
FragmentTransaction ft = getFragmentManager().beginTransaction();
fragment.setFirstName(firstName);
ft.addToBackStack(null);
ft.commit();
}
}
片段1 - 讓信息
package valdes.fragmenttabsmenu;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
public class WelcomeFragment extends Fragment {
public WelcomeFragment() {
// Required empty public constructor
}
interface WelcomeListener{
public void getFristName(String firstName);
}
private WelcomeListener listener;
private String firstName;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_welcome, container, false);
EditText editText = (EditText) view.findViewById(R.id.first_name);
firstName = editText.getText().toString();
return view;
}
@Override
public void onAttach(Context context){
super.onAttach(context);
this.listener = (WelcomeListener)context;
}
@Override
public void onPause(){
super.onPause();
if(listener != null){
listener.getFristName(firstName);
}
}
}
片段1 XML
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:padding="@dimen/activity_horizontal_margin">
<TextView
android:id="@+id/welcome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:textSize="25sp"
android:text="@string/welcome_message"/>
<EditText
android:id="@+id/first_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/first_name"/>
<EditText
android:id="@+id/last_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="@string/last_name"/>
<Spinner
android:id="@+id/birthday"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:entries="@array/months"/>
</LinearLayout>
片段2 - 讓信息
package valdes.fragmenttabsmenu;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
public class OverviewFragment extends Fragment {
private String firstName;
private String lastName;
public OverviewFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.fragment_overview, container, false);
}
@Override
public void onStart(){
super.onStart();
View view = getView();
if(view != null){
TextView name = (TextView) view.findViewById(R.id.OV_name);
name.setText(firstName);
}
}
public void setFirstName(String firstName){this.firstName = firstName;}
}
片段2 XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="valdes.fragmenttabsmenu.OverviewFragment">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"
android:textSize="25sp"
android:layout_weight="1"
android:text="@string/overview"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_horizontal"
android:textSize="40sp"
android:text="Responses go here"/>
<TextView
android:id="@+id/OV_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:text="TEST"/>
<Button
android:id="@+id/submit_button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/submit"/>
</LinearLayout>