新しいGMailアプリのように「下にスワイプして更新」を実装する方法
Googleはプルダウンを更新する別の方法で新しいGmailアプリをリリースします。
プルダウンされた開始された非表示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？アクションバーAPIでこれを行うものが見つかりません。
Chit BanesのGitHub上の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。
GoogleはこのサポートをSDKで直接リリースしました。どのバージョンをサポートする必要があるのかわかりません（問題になる可能性があります）。
公式のSDK機能情報はこちらからご覧ください： http://developer.Android.com/reference/Android/support/v4/widget/SwipeRefreshLayout.html
SDKを使用できる場合は、Chris Banesが post を書いて同じことを提案した方が良いでしょう。
これを試してください...それは私のために働いています。
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"};
}
}
Chris Banes（Androidに最適なプルツーリフレッシュコンポーネントを実装した同じ男）も、Pull To RefreshのようなGmailを実装しました。
ここにあります： https://github.com/chrisbanes/ActionBar-PullToRefresh
このプロジェクトはまだ開発中であるため、現在のAPIが変更される可能性があることに注意してください。
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;
}
}
試して。使用：swipeRefreshLayout.setRotation（180f）;
アダプターのListViewで、getViewメソッド：view.setRotation（180f）;
リスト内のアイテムの順序を逆にします。
または、xmlで直接Android：rotation = "180"を使用します。