将值从 activity 传递到选项卡
Passing values from activity to tabs
我在一个新的 Android 项目中工作。
第一个 activity 使用滑块菜单和片段。在第一个片段上有一个列表视图 (PrimaryFragmentDormir.java)。选择其中一行后，将启动一个新的 activity。最后一个 activity 使用三个选项卡来显示有关所选行对象的不同信息。
列表视图是从远程 JSON 文件加载的。
这是 PrimaryFragmentDormir.java:
处的 onItemClick 方法
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Hotel hotelActual = (Hotel) adapter.getItem(position);
String msg = "Elegiste el hotel " + hotelActual.getNombre();
Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();
Intent intent = new Intent(getActivity(), Detalle_Hotel.class);
intent.putExtra("id_hotel", hotelActual.getId_hotel());
intent.putExtra("nombre_hotel", hotelActual.getId_hotel());
intent.putExtra("descripcion_hotel", hotelActual.getId_hotel());
intent.putExtra("latitud_hotel", hotelActual.getId_hotel());
intent.putExtra("longitud_hotel", hotelActual.getId_hotel());
intent.putExtra("direccion_hotel", hotelActual.getId_hotel());
intent.putExtra("web_hotel", hotelActual.getId_hotel());
intent.putExtra("tel_hotel", hotelActual.getId_hotel());
intent.putExtra("tel_reservas", hotelActual.getId_hotel());
intent.putExtra("foto_hotel", hotelActual.getId_hotel());
intent.putExtra("calificacion_hotel", hotelActual.getId_hotel());
intent.putExtra("num_estrellas", hotelActual.getId_hotel());
intent.putExtra("zona_hotel", hotelActual.getId_hotel());
intent.putExtra("facebook_hotel", hotelActual.getFacebook());
intent.putExtra("twitter_hotel", hotelActual.getTwitter());
startActivity(intent);
}
显示 Toast 并显示 activity Detalle_Hotel。
Detalle_Hotel 有三个选项卡。
我需要的是从三个选项卡中的 hotelActual 获取值，以便分别使用它们。
这是Detalle_Hotel activity:
public class Detalle_Hotel extends AppCompatActivity {
// Declaring Your View and Variables
private String nombre_hotel, foto_hotel, descripcion_hotel,direccion_hotel,web_hotel,tel_hotel,tel_reservas,zona_hotel,facebook_hotel,twitter_hotel;
private int num_estrellas_hotel, id_hotel;
private double calificacion_hotel,latitud_hotel,longitud_hotel;
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Info","Mapa","Opinión"};
int Numboftabs =3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detalle__hotel);
nombre_hotel = getIntent().getStringExtra("nombre_hotel");
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.rojomodesto);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
}
这里我收到了来自 nombre_hotel 的值（作为对其他值的测试），现在如何将它传递给选项卡？
这是tab1代码：
public class Tab1 extends Fragment {
private TextView hotel_nombre;
private String nombre_hotel;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
@Override
public void onActivityCreated(Bundle state) {
super.onActivityCreated(state);
hotel_nombre = (TextView) getView().findViewById(R.id.nombre_hotel);
hotel_nombre.setText(getActivity().nombre_hotel));
}
}
第 hotel_nombre.setText(getActivity().nombre_hotel)); 行在第二个 nombre_hotel 处显示警告：“无法解析符号 'nombre_hotel'。
欢迎任何帮助。
编辑：
ViewPageAdapter.java
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
if (position == 0) // if the position is 0 we are returning the First tab
{
Tab1 tab1 = new Tab1();
return tab1;
}
if (position == 1) // if the position is 0 we are returning the First tab
{
Tab2 tab2 = new Tab2();
return tab2;
}
if (position == 2) // if the position is 0 we are returning the First tab
{
Tab3 tab3 = new Tab3();
return tab3;
}
return null;
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
}
}
在您的适配器中，您现在需要正确初始化它（使用字符串作为参数）。
public class Tab1 extends Fragment {
private static final String HOTEL = "hotel";
private TextView hotel_nombre;
private String nombre_hotel;
public static Tab1 newInstance(String s) {
Tab1 result = new Tab1();
Bundle bundle = new Bundle();
bundle.putString(HOTEL, s);
result.setArguments(bundle);
return result;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = this.getArguments();
nombre_hotel = bundle.getString(HOTEL);
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
@Override
public void onActivityCreated(Bundle state) {
super.onActivityCreated(state);
hotel_nombre = (TextView) getView().findViewById(R.id.nombre_hotel);
hotel_nombre.setText(nombre_hotel);
}
}
编辑：
将您的 Detalle_Hotel Activity 适配器更改为：
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs,nombre_hotel);
然后在适配器中：
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
private String hotelNumbre;
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabsumb, String hotelNum) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
this.hotelNumbre = hotelNum;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
if (position == 0) // if the position is 0 we are returning the First tab
{
return Tab1.newInstance(hotelNumbre);
}
if (position == 1) // if the position is 0 we are returning the First tab
{
Tab2 tab2 = new Tab2();
return tab2;
}
if (position == 2) // if the position is 0 we are returning the First tab
{
Tab3 tab3 = new Tab3();
return tab3;
}
return null;
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
}
}
您需要将 nombre_hotel 字段设置为 public 而不是私有字段，然后使用：
hotel_nombre.setText((Detalle_Hotel)getActivity().nombre_hotel));
val intent = Intent(activity, VoiceCommandServiceActivity::class.java)
intent.putExtra(SELECT_SERVICES, mServiceName as Serializable)
startActivity(activity, intent)
intent?.let {
it.extras?.let { extras ->
extras?.let { bundle ->
if (bundle.containsKey(SELECT_SERVICES)) {
val service = extras.getSerializable(SELECT_SERVICES) as MutableList<AppServiceModel>
}
}
}
}
我在一个新的 Android 项目中工作。
第一个 activity 使用滑块菜单和片段。在第一个片段上有一个列表视图 (PrimaryFragmentDormir.java)。选择其中一行后，将启动一个新的 activity。最后一个 activity 使用三个选项卡来显示有关所选行对象的不同信息。 列表视图是从远程 JSON 文件加载的。
这是 PrimaryFragmentDormir.java:
处的 onItemClick 方法public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Hotel hotelActual = (Hotel) adapter.getItem(position);
String msg = "Elegiste el hotel " + hotelActual.getNombre();
Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();
Intent intent = new Intent(getActivity(), Detalle_Hotel.class);
intent.putExtra("id_hotel", hotelActual.getId_hotel());
intent.putExtra("nombre_hotel", hotelActual.getId_hotel());
intent.putExtra("descripcion_hotel", hotelActual.getId_hotel());
intent.putExtra("latitud_hotel", hotelActual.getId_hotel());
intent.putExtra("longitud_hotel", hotelActual.getId_hotel());
intent.putExtra("direccion_hotel", hotelActual.getId_hotel());
intent.putExtra("web_hotel", hotelActual.getId_hotel());
intent.putExtra("tel_hotel", hotelActual.getId_hotel());
intent.putExtra("tel_reservas", hotelActual.getId_hotel());
intent.putExtra("foto_hotel", hotelActual.getId_hotel());
intent.putExtra("calificacion_hotel", hotelActual.getId_hotel());
intent.putExtra("num_estrellas", hotelActual.getId_hotel());
intent.putExtra("zona_hotel", hotelActual.getId_hotel());
intent.putExtra("facebook_hotel", hotelActual.getFacebook());
intent.putExtra("twitter_hotel", hotelActual.getTwitter());
startActivity(intent);
}
显示 Toast 并显示 activity Detalle_Hotel。
Detalle_Hotel 有三个选项卡。 我需要的是从三个选项卡中的 hotelActual 获取值，以便分别使用它们。
这是Detalle_Hotel activity:
public class Detalle_Hotel extends AppCompatActivity {
// Declaring Your View and Variables
private String nombre_hotel, foto_hotel, descripcion_hotel,direccion_hotel,web_hotel,tel_hotel,tel_reservas,zona_hotel,facebook_hotel,twitter_hotel;
private int num_estrellas_hotel, id_hotel;
private double calificacion_hotel,latitud_hotel,longitud_hotel;
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Info","Mapa","Opinión"};
int Numboftabs =3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detalle__hotel);
nombre_hotel = getIntent().getStringExtra("nombre_hotel");
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.rojomodesto);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
}
这里我收到了来自 nombre_hotel 的值（作为对其他值的测试），现在如何将它传递给选项卡？
这是tab1代码：
public class Tab1 extends Fragment {
private TextView hotel_nombre;
private String nombre_hotel;
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
@Override
public void onActivityCreated(Bundle state) {
super.onActivityCreated(state);
hotel_nombre = (TextView) getView().findViewById(R.id.nombre_hotel);
hotel_nombre.setText(getActivity().nombre_hotel));
}
}
第 hotel_nombre.setText(getActivity().nombre_hotel)); 行在第二个 nombre_hotel 处显示警告：“无法解析符号 'nombre_hotel'。
欢迎任何帮助。
编辑：
ViewPageAdapter.java
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
if (position == 0) // if the position is 0 we are returning the First tab
{
Tab1 tab1 = new Tab1();
return tab1;
}
if (position == 1) // if the position is 0 we are returning the First tab
{
Tab2 tab2 = new Tab2();
return tab2;
}
if (position == 2) // if the position is 0 we are returning the First tab
{
Tab3 tab3 = new Tab3();
return tab3;
}
return null;
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
}
}
在您的适配器中，您现在需要正确初始化它（使用字符串作为参数）。
public class Tab1 extends Fragment {
private static final String HOTEL = "hotel";
private TextView hotel_nombre;
private String nombre_hotel;
public static Tab1 newInstance(String s) {
Tab1 result = new Tab1();
Bundle bundle = new Bundle();
bundle.putString(HOTEL, s);
result.setArguments(bundle);
return result;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle bundle = this.getArguments();
nombre_hotel = bundle.getString(HOTEL);
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
@Override
public void onActivityCreated(Bundle state) {
super.onActivityCreated(state);
hotel_nombre = (TextView) getView().findViewById(R.id.nombre_hotel);
hotel_nombre.setText(nombre_hotel);
}
}
编辑：
将您的 Detalle_Hotel Activity 适配器更改为：
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs,nombre_hotel);
然后在适配器中：
public class ViewPagerAdapter extends FragmentStatePagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
private String hotelNumbre;
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm, CharSequence mTitles[], int mNumbOfTabsumb, String hotelNum) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
this.hotelNumbre = hotelNum;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
if (position == 0) // if the position is 0 we are returning the First tab
{
return Tab1.newInstance(hotelNumbre);
}
if (position == 1) // if the position is 0 we are returning the First tab
{
Tab2 tab2 = new Tab2();
return tab2;
}
if (position == 2) // if the position is 0 we are returning the First tab
{
Tab3 tab3 = new Tab3();
return tab3;
}
return null;
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
}
}
您需要将 nombre_hotel 字段设置为 public 而不是私有字段，然后使用：
hotel_nombre.setText((Detalle_Hotel)getActivity().nombre_hotel));
val intent = Intent(activity, VoiceCommandServiceActivity::class.java)
intent.putExtra(SELECT_SERVICES, mServiceName as Serializable)
startActivity(activity, intent)
intent?.let {
it.extras?.let { extras ->
extras?.let { bundle ->
if (bundle.containsKey(SELECT_SERVICES)) {
val service = extras.getSerializable(SELECT_SERVICES) as MutableList<AppServiceModel>
}
}
}
}