34

Google は新しい Gmail アプリをリリースし、プルダウンから更新を処理する別の方法を採用しました。

プルダウンされた非表示の開始行を表示する代わりに。Gmail では、アクション バーの上にアニメーション メッセージが表示されます。

メッセージには、アニメーション化された水平線が含まれます。

これは Android SDK の標準機能ですか? これを行うアクションバー API には何も見つかりません。

ここに画像の説明を入力

4

6 に答える 6

22

GitHub の Chris Banes の ActionBar-PullToRefresh ライブラリは、おそらく GMail アプリに最も近いプル ツー リフレッシュ機能を提供します。

参照: Juhani Lehtimäki による GMail pull-to-refresh の分析。

于 2013-06-13T15:51:12.967 に答える
10

これを試してください...それは私にとってはうまくいきます。

res/layout/activity_main.xml

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.swipetorefresh.MainActivity"
tools:ignore="MergeRootFrame" />

res/layout/fragment_main.xml

<android.support.v4.widget.SwipeRefreshLayout           
       xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:id="@+id/container"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
       tools:ignore="MergeRootFrame" >

   <ListView
      android:id="@android:id/list"
      android:layout_width="match_parent"
      android:layout_height="match_parent" />

</android.support.v4.widget.SwipeRefreshLayout>

MainActivity.java

  public class MainActivity extends Activity {

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

    if (savedInstanceState == null) {
        getFragmentManager().beginTransaction()
                .add(R.id.container, new PlaceholderFragment()).commit();
    }
}

public static class PlaceholderFragment extends ListFragment implements OnRefreshListener {

    private SwipeRefreshLayout mSwipeRefreshLayout;

    private static final int LIST_ITEM_COUNT = 5;
    private int mOffset = 0;

    private ArrayAdapter<String> mListAdapter;

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_main, container,
                false);

        // Configure the swipe refresh layout
        mSwipeRefreshLayout = (SwipeRefreshLayout) rootView.findViewById(R.id.container);
        mSwipeRefreshLayout.setOnRefreshListener(this);
        mSwipeRefreshLayout.setColorScheme(
                R.color.swipe_color_1, R.color.swipe_color_2,
                R.color.swipe_color_3, R.color.swipe_color_4);

        // Put the first batch of countries in the list
        mListAdapter = new ArrayAdapter<String>(
                getActivity(),
                android.R.layout.simple_list_item_1,
                android.R.id.text1,
                getCountries(mOffset));

        setListAdapter(mListAdapter);

        return rootView;
    }

    private List<String> getCountries(int offset) {
        ArrayList<String> countriesList = new ArrayList<String>();
        for(int i=0; i<LIST_ITEM_COUNT;i++){
            countriesList.add(COUNTRIES[offset+i]);
        }

        mOffset = offset + LIST_ITEM_COUNT;
        return countriesList;
    }

    @Override
    public void onRefresh() {
        // Start showing the refresh animation
        mSwipeRefreshLayout.setRefreshing(true);

        // Simulate a long running activity
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
               updateCountries();
            }
        }, 5000);
    }



    private void updateCountries() {

        // Add the next batch of countries to the list
        mListAdapter.addAll(getCountries(mOffset));

        // Signify that we are done refreshing
        mSwipeRefreshLayout.setRefreshing(false);
    }



    private static final String[] COUNTRIES = {"Afghanistan",
        "Albania", "Algeria", "American Samoa", "Andorra", "Angola",
        "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina",
        "Armenia", "Aruba", "Australia", "Austria", "Azerbaijan",
        "Bahamas", "Bahrain", "Bangladesh", "Barbados", "Belarus",
        "Belgium", "Belize", "Benin", "Bermuda", "Bhutan",
        "Bolivia", "Bosnia and Herzegovina", "Botswana", "Brazil",
        "Brunei Darussalam", "Bulgaria", "Burkina Faso", "Burundi",
        "Cambodia", "Cameroon", "Canada", "Cape Verde", "Cayman Islands",
        "Central African Republic", "Chad", "Chile", "China",
        "Christmas Island", "Cocos (Keeling) Islands", "Colombia",
        "Comoros", "Democratic Republic of the Congo (Kinshasa)",
        "Congo, Republic of(Brazzaville)", "Cook Islands", "Costa Rica",
        "Ivory Coast", "Croatia", "Cuba", "Cyprus", "Czech Republic",
        "Denmark", "Djibouti", "Dominica", "Dominican Republic",
        "East Timor (Timor-Leste)", "Ecuador", "Egypt",
        "El Salvador", "Equatorial Guinea", "Eritrea", "Estonia", "Ethiopia"};

        }
   }
于 2014-07-14T11:52:53.047 に答える
1 
fragment_main.xml

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.testloading.MainActivity$PlaceholderFragment" >

  <ListView
      android:id="@+id/list"
      android:layout_width="match_parent"
      android:layout_height="match_parent" />

</RelativeLayout>    


counteries.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView 
        android:id="@+id/text_view"
        android:layout_width="match_parent"
        android:layout_height="47dp"
        android:gravity="center_vertical"
        android:textStyle="bold"/>
</LinearLayout>



package com.example.testloading;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

    private static final String TAG = MainActivity.class.getSimpleName();

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

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.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();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        private ListView listView;
        private static final int LIST_ITEM_COUNT = 20;
        private int mOffset = 0;
        private boolean flag_loading;

        private MyAdapter adapter;
        private List<String> list;

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container,
                    false);

            listView = (ListView) rootView.findViewById(R.id.list);
            list = getCountries(mOffset);
            adapter = new MyAdapter(list, getActivity());
            listView.setAdapter(adapter);
            listView.setOnScrollListener(new OnScrollListener() {

                @Override
                public void onScrollStateChanged(AbsListView view,
                        int scrollState) {
                }

                @Override
                public void onScroll(AbsListView view, int firstVisibleItem,
                        int visibleItemCount, int totalItemCount) {
                    Log.d(TAG, "firstVisibleItem : " + firstVisibleItem
                            + " , visibleItemCount : " + visibleItemCount
                            + " , totalItemCount : " + totalItemCount);
                    if (firstVisibleItem + visibleItemCount == totalItemCount) {
                        Log.d(TAG, "ZZZ offSet : " + mOffset);
                        if (COUNTRIES.length > mOffset) {
                            if (flag_loading == false) {
                                Log.d(TAG, "ZZZ inside : ");
                                flag_loading = true;
                                additems();
                            }
                        }
                    }

                }
            });
            return rootView;
        }

        protected void additems() {
            list.addAll(getCountries(mOffset));
            adapter.notifyDataSetChanged();
            listView.invalidate();
            flag_loading = false;
        }

        private List<String> getCountries(int offset) {
            ArrayList<String> countriesList = new ArrayList<String>();
            for (int i = 0; i < LIST_ITEM_COUNT; i++) {
                if (COUNTRIES.length > offset + i) {
                    countriesList.add(COUNTRIES[offset + i]);
                }
            }

            mOffset = offset + LIST_ITEM_COUNT;
            return countriesList;
        }

        private static final String[] COUNTRIES = { "Afghanistan", "Albania",
                "Algeria", "American Samoa", "Andorra", "Angola", "Anguilla",
                "Antarctica", "Antigua and Barbuda", "Argentina", "Armenia",
                "Aruba", "Australia", "Austria", "Azerbaijan", "Bahamas",
                "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium",
                "Belize", "Benin", "Bermuda", "Bhutan", "Bolivia",
                "Bosnia and Herzegovina", "Botswana", "Brazil",
                "Brunei Darussalam", "Bulgaria", "Burkina Faso", "Burundi",
                "Cambodia", "Cameroon", "Canada", "Cape Verde",
                "Cayman Islands", "Central African Republic", "Chad", "Chile",
                "China", "Christmas Island", "Cocos (Keeling) Islands",
                "Colombia", "Comoros",
                "Democratic Republic of the Congo (Kinshasa)",
                "Congo, Republic of(Brazzaville)", "Cook Islands",
                "Costa Rica", "Ivory Coast", "Croatia", "Cuba", "Cyprus",
                "Czech Republic", "Denmark", "Djibouti", "Dominica",
                "Dominican Republic", "East Timor (Timor-Leste)", "Ecuador",
                "Egypt", "El Salvador", "Equatorial Guinea", "Eritrea",
                "Estonia", "Ethiopia" };

    }
}

class MyAdapter extends BaseAdapter {

    private List<String> list;
    private LayoutInflater layoutInflater;

    public MyAdapter(List<String> list, Context context) {
        this.list = list;
        layoutInflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup arg2) {

        ViewHolder viewHolder;

        if (convertView == null) {
            convertView = layoutInflater.inflate(R.layout.counteries, null);
            viewHolder = new ViewHolder();
            viewHolder.textView = (TextView) convertView
                    .findViewById(R.id.text_view);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        viewHolder.textView.setText(list.get(position));
        return convertView;
    }

    class ViewHolder {
        public TextView textView;
    }
}
于 2014-07-27T07:17:11.900 に答える