你好我正在使用viewpager和tabs中的3片段（片段A，B，C）开发一个Android应用程序，viewpager工作正常。片段A包含列表视图，当用户单击项目时，应用程序打开片段对话框，其中包含有关所选项目的信息。该对话框有一个名为“添加到收藏夹”的按钮。现在我想在用户按下按钮时执行此操作：
我该怎么做？
这是我的代码的一部分：
* MainFragmentActivity * （这很好用）
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_tube);
// Set up the action bar.
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager
.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public void onTabSelected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab,
FragmentTransaction fragmentTransaction) {
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
FragmentA a = new FragmentA();
Bundle args1 = new Bundle();
args1.putInt(FragmentA.ARG_SECTION_NAME , position + 1);
a.setArguments(args1);
return a;
case 1:
FragmentB b= new FragmentB();
Bundle args2 = new Bundle();
args2.putInt(FragmentB.ARG_SECTION_NAME , position + 2);
b.setArguments(args2);
return b;
case 2:
FragmentC c= new FragmentC();
Bundle args3 = new Bundle();
args3.putInt(FragmentC.ARG_SECTION_NAME , position + 3);
c.setArguments(args3);
return c;
default:
return null;
}
}
这是片段对话
* FragmentDialogView *
public class FragmentDialogView extends DialogFragment implements OnClickListener {
private static final int REAUTH_ACTIVITY_CODE = 0;
private String videoId;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
Bundle mArgs = getArguments();
View view = (View) inflater.inflate(R.layout.fragment_dialog_view, container, false);
//Buttons
Button button = (Button) view.findViewById(R.id.button_one);
button.setOnClickListener(this);
buttonDownload.setOnClickListener(this);
return view;
}
@Override
public void onSaveInstanceState(Bundle bundle) {
super.onSaveInstanceState(bundle);
}
@Override
public void onResume() {
super.onResume();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REAUTH_ACTIVITY_CODE) {
}
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button_one:
//Here it should show the fragment B inside the viewpager
break;
default:
break;
}
}
}
答案 0 :(得分：3)
要取消Dialog在您的DialogFragment课程中包含以下内容
private Dialog dialog;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
dialog = new Dialog(getActivity());
return dialog;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button_one:
dismiss();
break;
default:
break;
}
}
创建界面
创建以下 Communicator.java
public interface Communicator {
public void respond(int i);
}
实施此 Communicator
在您的片段中创建此 Communicator 的instance
public class FragmentDialogView extends DialogFragment implements OnClickListener {
private Communicator com;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
com = (Communicator) getActivity();
btn.setOnClickListener(this);
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn:
com.respond(1);
break;
}
}
每当您点击 按钮 时，它会将int发送到位于 MainActivity <内的方法/ p>
将如下所示
@Override
public void respond(int i) {
// Receive a bundle here
// and pass the corresponding information to the FragmentB
// here i'm receving an int and pass it to the FragmentB as a String
FragmentManager fm = getFragmentManager();
FragmentB fragment = (FragmentB) fm.findFragmentByTag("FragmentB");
fragment.fromMainActivity(""+i);
// If the above the one doesn't work keep the instance as Static and then try
viewPager.invalidate();
pagerAdapter.notifyDataSetChanged();
viewPager.setCurrentItem(1, true);
// Inside the setCuttentItem() method 0 first tab
// 1 second tab
// 2 third tab and so on
}
我在这里收到了一个int。您可以使用捆绑包来传递相应的信息。这将更改viewPager以显示下一个标签
并保留任何简单的方法，如下面的
中的FragmentBpublic void fromMainActivity(String sample) {
Toast.makeText(getActivity(), sample, duration).show();
}
我希望这会有所帮助:)快乐编码
答案 1 :(得分：2)
1.试试这个：getDialog（）。dismiss（）;
2.据我所知，在你的片段中创建一个这样的方法，
public static FirstFragment newInstance(String text){
FirstFragment f= new FirstFragment();
return f;
}
在onClick()按钮FirstFragment.newInstance("Fragment, Instance 1");中调用它，例如Interface
3.使用DialogFragment中的方法创建myFragmentDialog.setTargetFragment(this, 0)可以调用将您想要的任何数据传递回创建所述DialogFragment的Fragment。同时将Fragment设置为目标，例如((MyInterface)getTargetFragment()).methodToPassData(data)。然后在对话框中，使用getTargetFragment（）获取目标片段对象并强制转换为您创建的接口。现在，您可以使用{{1}}传递数据。
有关详细信息：link