我在我的应用程序中实现了一个滑动条，现在当我向每个条形图添加3个图像并返回第一个图像时，图像似乎变为第三个，这是我完成标签的位置;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
switch (container.getChildCount()) {
case 0: {
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText("GIOTONNNNNNNNNNNNNNNNNNN ");
ImageView imag1 = (ImageView) rootView.findViewById(R.id.image);
new ImageLoadTask("http://gioton.com/bar/DAC.jpg", imag1).execute();
break;
}
case 1: {
TextView textView2 = (TextView) rootView.findViewById(R.id.section_label);
textView2.setText("prueba color 2 verde");
ImageView imag2 = (ImageView) rootView.findViewById(R.id.image);
imag2.setBackgroundColor(Color.GREEN);
break;
}
case 2: {
TextView textView3 = (TextView) rootView.findViewById(R.id.section_label);
textView3.setText("Azulcito");
ImageView imag3 = (ImageView) rootView.findViewById(R.id.image);
imag3.setBackgroundColor(Color.BLUE);
break;
}
}
return rootView;
}
我的主要代码
public class MainActivity extends AppCompatActivity {
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*/
private SectionsPagerAdapter mSectionsPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// 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.container);
mViewPager.setAdapter(mSectionsPagerAdapter);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
tabLayout.setupWithViewPager(mViewPager);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
return PlaceholderFragment.newInstance(position + 1);
}
@Override
public int getCount() {
// Show 3 total pages.
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Gioton";
case 1:
return "prueba 2";
case 2:
return "Prueba 3 Az 3";
}
return null;
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
switch (container.getChildCount()) {
case 0: {
TextView textView = (TextView) rootView.findViewById(R.id.section_label);
textView.setText("GIOTONNNNNNNNNNNNNNNNNNN ");
ImageView imag1 = (ImageView) rootView.findViewById(R.id.image);
new ImageLoadTask("http://gioton.com/bar/DAC.jpg", imag1).execute();
break;
}
case 1: {
TextView textView2 = (TextView) rootView.findViewById(R.id.section_label);
textView2.setText("prueba color 2 verde");
ImageView imag2 = (ImageView) rootView.findViewById(R.id.image);
imag2.setBackgroundColor(Color.GREEN);
break;
}
case 2: {
TextView textView3 = (TextView) rootView.findViewById(R.id.section_label);
textView3.setText("Azulcito");
ImageView imag3 = (ImageView) rootView.findViewById(R.id.image);
imag3.setBackgroundColor(Color.BLUE);
break;
}
}
return rootView;
}
}
}
和我的片段布局
<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment">
<TextView android:id="@+id/section_label" android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="25dp"
android:textStyle="bold|normal|italic" />
<ImageView
android:layout_width="300dp"
android:layout_height="300dp"
android:id="@+id/image"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />