我有一个活动，它有一个带有viewpager和CircularPager指标的协调器布局。我正在尝试使用MaterialRefreshLayout Library进行拉动刷新
找到该库然而，在我使用pull来刷新我的数据之后，viewpager只是不更新片段的其余部分，因此它不会滚动。一旦我做了背景前景，它就会滚动好。下面是布局和活动
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:context="myPackage.HomeActivity">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="@dimen/appbar_padding_top"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="scroll|enterAlways"
app:popupTheme="@style/AppTheme.PopupOverlay">
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<com.cjj.MaterialRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/refresh"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:overlay="true"
app:progress_show_arrow="true"
app:wave_show="false">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_horizontal"
android:layout_marginTop="65dp"
android:orientation="vertical">
<android.support.v4.view.ViewPager
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="@dimen/viewpager_height_none"
android:layout_weight="1"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
<mypackage.ui.CirclePageIndicator
android:id="@+id/indicator"
style="@style/PageIndicator"
android:clickable="false"
app:fillColor="@color/default_circle_indicator_stroke_color"
app:pageColor="@color/circlepageindicator_fill_color"
app:radius="@dimen/circlepageindicator_radius" />
</LinearLayout>
</com.cjj.MaterialRefreshLayout>
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|bottom"
android:layout_margin="@dimen/fab_margin"
android:src="@android:drawable/ic_dialog_email" />
</android.support.design.widget.CoordinatorLayout>
以下是活动
public class HomeActivity extends AppCompatActivity {
private SectionPagerAdapter mSectionPagerAdapter;
/**
* The {@link ViewPager} that will host the section contents.
*/
private ViewPager mViewPager;
private CirclePageIndicator mPagerCountIndicator;
private MaterialRefreshLayout materialRefreshLayout;
private Integer mTaskCount;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
Bundle extras = getIntent().getExtras();
if(extras != null) {
mTaskCount= extras.getInt("task_Count");
}
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
updateandShowViewPager();
materialRefreshLayout = (MaterialRefreshLayout) findViewById(R.id.refresh);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
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
protected void onResume() {
super.onResume();
materialRefreshLayout.setMaterialRefreshListener(new MaterialRefreshListener() {
@Override
public void onRefresh(MaterialRefreshLayout materialRefreshLayout) {
refresh();
}
});
materialRefreshLayout.finishRefresh();
}
@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_home, 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);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB) // API 11
private void startMyAsyncTask(AsyncTask asyncTask){
//execute my AsyncTask and call Update and Show ViewPager
}
private void updateandShowViewPager(){
AsyncTaskCallBack asyncTaskCallBack = new AsyncTaskCallBack() {
@Override
public void onSuccess() {
displayViewPager();
}
}
};
for(int taskCount = 1; taskCount <= mTaskCount; taskCount ++){
myAsyncTask = new MyAsyncTask();
startMyAsyncTask(myAsyncTask );
}
}
private void displayViewPager(){
mSectionPagerAdapter = new SectionPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(R.id.container);
mViewPager.setAdapter(mSectionPagerAdapter);
mTaskCountIndicator = (CirclePageIndicator) findViewById(R.id.indicator);
mTaskCountIndicator .setViewPager(mViewPager);
}
private void refresh() {
MyAsyncTask myAsyncTask = null;
MyAsyncTaskCallBack myAsyncTaskCallBack = new MyAsyncTaskCallBack () {
@Override
public void onSuccess() {
updateViewPager();
}
}
};
for(int taskCount = 1; taskCount <= mTaskCount; taskCount ++){
myAsyncTask = new MyAsyncTask();
startMyAsyncTask(myAsyncTask );
}
}
private void updateViewPager(){
mSectionPagerAdapter.setPagerItem(myMap);
mSectionPagerAdapter.notifyDataSetChanged();
mCartCountIndicator.notifyDataSetChanged();
mViewPager.invalidate();
}
}
不确定我在这里做错了什么。感谢任何建议。
答案 0 :(得分：1)
使用
mViewPager.setOffscreenPageLimit（numberOfPages）;
答案 1 :(得分：0)
好的，想想因为它本身就是没有刷新的活动，所以当我执行notifyDataSetChanged（）时，我在刷新方法中尝试了this.onResume（）。它有效。
不确定这是最干净的解决方案