拉动刷新自动滚动在 Android 中无法正常工作

Question

我在这个库的帮助下在滚动视图上使用拉动刷新工具

https://github.com/chrisbanes/Android-PullToRefresh

它工作得很好，而不是scrollTo(int,int); 方法 在我下面的代码中，在添加列表中的所有项目后，我终于使用了这种方法。

代码在这里。

public class MainActivity extends Activity {
PullToRefreshScrollView mPullRefreshScrollView;
LinearLayout listHolder;
ArrayList<String> list = new ArrayList<String>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    listHolder = (LinearLayout) findViewById(R.id.lay);

    // initial values in List
    for(int i =0;i<15;i++){
        list.add("InitialValue");
    }

    mPullRefreshScrollView = (PullToRefreshScrollView) findViewById(R.id.pull_refresh_scrollview);
    mPullRefreshScrollView
            .setOnRefreshListener(new OnRefreshListener<ScrollView>() {

                @Override
                public void onRefresh(
                        PullToRefreshBase<ScrollView> refreshView) {
                    new GetDataTask().execute();
                }
            });

    addJournal_Entry_page();
}

private class GetDataTask extends AsyncTask<Void, Void, String[]> {
    @Override
    protected String[] doInBackground(Void... params) {
        try {
            Thread.sleep(2000);
            for(int i =0;i<4;i++){
                list.add("InitialValue");
            }
        } catch (InterruptedException e) {
        }
        return null;
    }

    @Override
    protected void onPostExecute(String[] result) {
        // Do some stuff here

        // Call onRefreshComplete when the list has been refreshed.
        mPullRefreshScrollView.onRefreshComplete();
        addJournal_Entry_page();
        super.onPostExecute(result);
    }
}

private void addJournal_Entry_page() {

    View v;
    listHolder.removeAllViews();
    for (int i = 0; i < list.size(); i++) {
        v = this.getLayoutInflater().inflate(R.layout.list_row, null);
        TextView ind = (TextView)v.findViewById(R.id.index);
        TextView name = (TextView)v.findViewById(R.id.name);

        ind.setText(""+i);
        name.setText(list.get(i));

        listHolder.addView(v);
    }

    Resources r = getResources();
    float px = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
            100, r.getDisplayMetrics());

    //problem is Here
    mPullRefreshScrollView.scrollTo(0,(int)px);

}

}

我像这样在 XML 中定义了PullToRefreshScrollView

 <com.handmark.pulltorefresh.library.PullToRefreshScrollView
    xmlns:ptr="http://schemas.android.com/apk/res-auto"
    android:id="@+id/pull_refresh_scrollview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    ptr:ptrAnimationStyle="flip"
    ptr:ptrMode="pullFromStart" >

    <LinearLayout
        android:id="@+id/lay"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
    </LinearLayout>
</com.handmark.pulltorefresh.library.PullToRefreshScrollView>

我得到这样的结果

我的列表中有 15 个项目，因此它不应在列表底部显示空白。

非常感谢

Answer 1

请在此代码下的 PullToRefreshScrollView.java 中添加这一行

final class InternalScrollViewSDK9 扩展 ScrollView{

@Override
      public void scrollTo(int x, int y) {
          // TODO Auto-generated method stub
          super.scrollTo(x, y);
      }

}

在此处输入代码。这个对我有用。