Java 使用TabLayout将数据从一个片段发送到另一个片段
在使用表格布局时,我一直很难将数据从一个片段发送到另一个片段。我已经阅读了大量关于如何做到这一点的在线帖子,但在自己实施这些帖子时没有成功 我在应用程序中设置了四个片段。我试图将从第四个片段中的EditText元素收集的数据发送到第二个片段的TextView元素 我没有得到任何错误,但是文本没有显示在第二个片段中。我不知道如何从这里开始。谢谢 第四个片段(发送片段) 第二个片段(接收片段) 主要活动Java 使用TabLayout将数据从一个片段发送到另一个片段,java,android,android-fragments,android-viewpager,android-tablayout,Java,Android,Android Fragments,Android Viewpager,Android Tablayout,在使用表格布局时,我一直很难将数据从一个片段发送到另一个片段。我已经阅读了大量关于如何做到这一点的在线帖子,但在自己实施这些帖子时没有成功 我在应用程序中设置了四个片段。我试图将从第四个片段中的EditText元素收集的数据发送到第二个片段的TextView元素 我没有得到任何错误,但是文本没有显示在第二个片段中。我不知道如何从这里开始。谢谢 第四个片段(发送片段) 第二个片段(接收片段) 主要活动 public class MainActivity extends AppCompatActiv
public class MainActivity extends AppCompatActivity implements settings.SendMessage {
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_test);
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager());
ViewPager viewPager = findViewById(R.id.view_pager);
viewPager.setAdapter(sectionsPagerAdapter);
TabLayout tabs = findViewById(R.id.tabs);
tabs.setupWithViewPager(viewPager);
}
@Override
public void sendData(String message) {
String tag = "android:switcher:" + R.id.view_pager + ":" + 1;
tt f = (tt) getSupportFragmentManager().findFragmentByTag(tag);
f.displayReceivedData(message);
}
}
应用程序的其他部分可能出现故障 下面是您的工作示例代码 班级活动
public class MainActivity extends AppCompatActivity implements Setting.SendMessage {
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS, WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
SectionsPagerAdapter sectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager(),this );
ViewPager viewPager = findViewById(R.id.viewpager);
viewPager.setAdapter(sectionsPagerAdapter);
TabLayout tabs = findViewById(R.id.sliding_tabs);
tabs.setupWithViewPager(viewPager);
}
@Override
public void sendData(String message) {
String tag = "android:switcher:" + R.id.viewpager + ":" + 1;
tt f = (tt) getSupportFragmentManager().findFragmentByTag(tag);
f.displayReceivedData(message);
}
}
班级设置
public class Setting extends Fragment {
SendMessage SM;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.setl, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Button btnPassData = (Button) view.findViewById(R.id.btnPassData);
final EditText inData = (EditText) view.findViewById(R.id.inMessage);
btnPassData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SM.sendData(inData.getText().toString().trim());
}
});
}
public interface SendMessage {
void sendData(String message);
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
try {
SM = (SendMessage) getActivity();
} catch (ClassCastException e) {
throw new ClassCastException("Error in retrieving data. Please try again");
}
}
}
tt类
public class tt extends Fragment {
TextView txtData;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.tt, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
txtData = (TextView)view.findViewById(R.id.txtData);
}
public void displayReceivedData(String message) {
txtData.setText("Data received: "+ message);
}
}
类分段自适应
public class SectionsPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 2;
private String tabTitles[] = new String[] { "Tab1", "Tab2"};
private Context context;
public SectionsPagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
@Override
public int getCount() {
return PAGE_COUNT;
}
@Override
public Fragment getItem(int position) {
if(position==0){
return new Setting();
}
else
return new tt();
}
@Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
}
一切看起来都很好。你也可以分享你的SectionsPagerAdapter课程!
public class tt extends Fragment {
TextView txtData;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(
R.layout.tt, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
txtData = (TextView)view.findViewById(R.id.txtData);
}
public void displayReceivedData(String message) {
txtData.setText("Data received: "+ message);
}
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
final int PAGE_COUNT = 2;
private String tabTitles[] = new String[] { "Tab1", "Tab2"};
private Context context;
public SectionsPagerAdapter(FragmentManager fm, Context context) {
super(fm);
this.context = context;
}
@Override
public int getCount() {
return PAGE_COUNT;
}
@Override
public Fragment getItem(int position) {
if(position==0){
return new Setting();
}
else
return new tt();
}
@Override
public CharSequence getPageTitle(int position) {
return tabTitles[position];
}
}