Contextual Action bar(3) 两个示例

一.通过activity启动Context Action Bar

1.主java

public class ActivityActionModeFrgmt extends Fragment implements
        OnCheckedChangeListener, ActionMode.Callback {
    private ActionMode mActionMode;
    private CheckBox mCheckBox;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.frgmt_cab_for_activity, container,
                false);
        mCheckBox = (CheckBox) v.findViewById(R.id.vid_check_box);
        mCheckBox.setOnCheckedChangeListener(this);
        return v;
    }

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        if (isChecked) {
            mActionMode = getActivity().startActionMode(this);// activity启动一个继承ActionMode,需要ActionMode.Callback
        }else
        {
            mActionMode.finish();
        }
    }

    // for ActionMode.Callback
    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        MenuInflater inflater = getActivity().getMenuInflater();
        inflater.inflate(R.menu.menu_context_for_activity, menu);// 创建context action
                                                                // bar的菜单
        return true;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        mode.setTitle("Checked");
        return true;
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        switch (item.getItemId()) {
        case R.id.action_delete:
            Toast.makeText(getActivity(), "delete", Toast.LENGTH_SHORT).show();
            break;
        case R.id.action_send:
            Toast.makeText(getActivity(), "send", Toast.LENGTH_SHORT).show();
            break;
        case R.id.action_share:
            Toast.makeText(getActivity(), "share", Toast.LENGTH_SHORT).show();
            break;
        case R.id.action_settings:
            Toast.makeText(getActivity(), "settings", Toast.LENGTH_SHORT)
                    .show();
            break;
        default:
            break;
        }
        mode.finish();
        return true;
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
        mCheckBox.setChecked(false);
    }
}

2.菜单文件 menu_context_for_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_delete"
        android:icon="@android:drawable/ic_menu_delete"
        android:showAsAction="ifRoom|withText"
        android:title="@string/delete"
        android:titleCondensed="delete">
    </item>
    <item
        android:id="@+id/action_share"
        android:showAsAction="ifRoom|withText"
        android:title="@string/share"/>
    <item
        android:id="@+id/action_send"
        android:showAsAction="ifRoom|withText"
        android:title="@string/send"/>
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/action_settings"/>

</menu>

3.布局文件 frgmt_cab_for_activity.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/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/aty_action_mode" />

    <CheckBox
        android:id="@+id/vid_check_box"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/view_s_check_mode" />

</LinearLayout>

二. ListView 用Context Action Bar 多选删除示例

1.MultiCabFrgmt.java

public class MultiCabFrgmt extends Fragment implements MultiChoiceModeListener {

    private ListView mListView;
    private SelectionArrayAdapter adapter;
    private List<ItemData> data;

    private ShareActionProvider mShareActionProvider;

    public boolean isItemSelected(int position) {
        return false;
    }

    private void init() {
        data = new ArrayList<ItemData>();
        ItemData ida;
        for (int i = 0; i < 32; ++i) {
            ida = new ItemData();
            ida.txt = "item" + i;
            data.add(ida);
        }
        adapter = new SelectionArrayAdapter(getActivity(),
                android.R.layout.simple_list_item_1, data);
        mListView.setAdapter(adapter);
        mListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);//CHOICE_MODE_SINGLE
        mListView.setMultiChoiceModeListener(this);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.frgmt_cab_for_listview, container, false);
        mListView = (ListView) v.findViewById(R.id.id_listview);
        init();
        return v;
    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        MenuInflater inflater = getActivity().getMenuInflater();
        inflater.inflate(R.menu.menu_context_for_listview, menu);
        MenuItem mi = menu.findItem(R.id.action_share);
        mShareActionProvider = (ShareActionProvider) mi.getActionProvider();
        mShareActionProvider.setShareIntent(new Intent(Intent.ACTION_SEND)
                .setType("image/*"));
        return true;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        return true;
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        switch (item.getItemId()) {
        case R.id.action_delete: {
            for (int i = data.size() - 1; i >= 0; --i) {
                if (data.get(i).selected) {
                    data.remove(i);
                }
            }
        }
            break;
        case R.id.action_share:
            break;
        case R.id.action_settings:
        }
        mode.finish();
        return true;
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
        for (int i = 0; i < data.size(); i++) {
            data.get(i).selected = false;
        }
    }

    @Override
    public void onItemCheckedStateChanged(ActionMode mode, int position,
            long id, boolean checked) {
        ItemData ida = data.get(position);
        ida.selected = !ida.selected;
        adapter.notifyDataSetChanged();
        mode.setTitle(mListView.getCheckedItemCount() + " selected");
    }
}

2.SelectionArrayAdapter.java

public class SelectionArrayAdapter extends ArrayAdapter<ItemData> {

    private List<ItemData> data;
    private LayoutInflater inflater;
    private int resource;

    private void init(Context context,int resource,List<ItemData> data){
        this.data = (ArrayList<ItemData>) data;
        inflater = LayoutInflater.from(context);
        this.resource = resource;
    }
    public SelectionArrayAdapter(Context context, int resource,
            int textViewResourceId, List<ItemData> data) {
        super(context, resource, textViewResourceId, data);
        init(context,resource,data);
    }
    public SelectionArrayAdapter(Context context, int resource,
            List<ItemData> data) {
        super(context, resource, data);
        init(context,resource,data);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (null == convertView) {
            convertView = inflater.inflate(this.resource, null);
        }
        TextView tv = (TextView) convertView.findViewById(android.R.id.text1);
        ItemData item = getItem(position);
        tv.setText(item.txt);
        if (item.selected) {
            convertView.setBackgroundColor(0x7f0f0f0f);// this is a selected
        }else{
            convertView.setBackgroundColor(0x7ff0f0f0); // default color
        }
        return convertView;
    }

    @Override
    public ItemData getItem(int position) {
        return data.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public void clear() {
        super.clear();
    }

    @Override
    public int getCount() {
        int sz = data.size();
        return sz;
    }
}

3.Context Action Bar的操作项菜单文件 menu_context_for_listview.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_share"
        android:orderInCategory="100"
        android:actionProviderClass="android.widget.ShareActionProvider"
        android:showAsAction="always"
        android:title="@string/share"/>
     <item
        android:id="@+id/action_delete"
        android:showAsAction="ifRoom|withText"
        android:title="@string/delete"/>
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        android:showAsAction="never"
        android:title="@string/action_settings"/>

</menu>