PopupMenu和ActionMode的使用

package com.example.mhyuam.actionmode;

import android.content.Context;
import android.support.v7.widget.PopupMenu;
import android.util.AttributeSet;
import android.view.MenuItem;
import android.view.View;
import android.widget.LinearLayout;

import android.widget.TextView;
import android.widget.Toast;

/**
 * Created by mhyuam on 2016/7/20.
 */

/**
 * 想要将popmenu添加到每一项中，首先要自定义一个Itemview，将popMenu关联到我们的ItemView中来
 */
public class ContextListItem extends LinearLayout implements PopupMenu.OnMenuItemClickListener, View.OnClickListener {
    private PopupMenu popupMenu;
    private TextView textView;
    public ContextListItem(Context context) {
        super(context);
    }

    public ContextListItem(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ContextListItem(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }


    @Override
    public void onClick(View view) {
        popupMenu.show();
    }

    @Override
    public boolean onMenuItemClick(MenuItem menuItem) {

        String itemText = textView.getText().toString();
        switch (menuItem.getItemId()){
            case R.id.menu_delete:
                Toast.makeText(getContext(),"delete",Toast.LENGTH_SHORT).show();

                break;
            case R.id.menu_edit:
                Toast.makeText(getContext(),"edit",Toast.LENGTH_SHORT).show();
                break;
        }
        return true;
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        textView = (TextView) findViewById(R.id.text);
        View contextButton = findViewById(R.id.context);
        //为view添加点击事件，在view的onclick的事件中显示popupmenu
        contextButton.setOnClickListener(this);
        popupMenu = new PopupMenu(getContext(),contextButton);
        popupMenu.setOnMenuItemClickListener(this);
        popupMenu.inflate(R.menu.contextmenu);
    }
}

package com.example.mhyuam.actionmode;
import android.app.Activity;
import android.os.Bundle;
import android.util.SparseBooleanArray;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

/**
 * 想要使用ActionMode，需要实现很多的回调方法，直接implements ActionMode.Callback即可
 * 我们这里使用的是Listview的MultiChoiceModeListener接口，它是ActionMode.Callback的
 * 一个子接口
 *
 */

public class ActionModeActivity extends Activity implements AbsListView.MultiChoiceModeListener{

    private static final String[] ITEMS = {"one","two","three","four","five","six","seven","eight","nie",
        "ten","eleven","twelve","thirtheen","fourteenth","fifteenth"};
    private ListView listView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_action_mode);

        listView = new ListView(this);
        ArrayAdapter arrayAdapter = new ArrayAdapter(this,R.layout.list_item,R.id.text,ITEMS);
        listView.setAdapter(arrayAdapter);
        /**
         * 想要使用一个多选择项的ActionMode，需要将choiceMode属性设置为CHOICE_MODE_MULTIPLE_MODAL
         */
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);

        listView.setMultiChoiceModeListener(this);
        setContentView(listView,new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));


    }

    @Override
    public void onItemCheckedStateChanged(ActionMode actionMode, int i, long l, boolean b) {


        int count = listView.getCheckedItemCount();
        actionMode.setTitle(String.format("%d selected",count));

    }

    /**
     * 这个方法其实和是创建点击后叠层的菜单选项，这个不需要icon，系统会自动为我们加上
     * 点击一个菜单选项时会调用onActionItemClicked方法，来完成相应的操作
     * 其中间显示的是已选中的项数，每选中或者取消一项都会调用onItemCheckedStateChanged，将其显示到叠层上来
     * 选中的条目由getCheckedItemPositions()进行统计
     *
     * @param actionMode
     * @param menu
     * @return
     */
    @Override
    public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
        actionMode.getMenuInflater().inflate(R.menu.contextmenu,menu);
        return true;
    }

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

    @Override
    public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
        SparseBooleanArray itmes = listView.getCheckedItemPositions();
        switch (menuItem.getItemId()){
            case R.id.menu_delete:
                Toast.makeText(ActionModeActivity.this,"item_delete",Toast.LENGTH_SHORT).show();
                break;
            case R.id.menu_edit:
                Toast.makeText(ActionModeActivity.this,"item_edit",Toast.LENGTH_SHORT).show();
                break;
            default:
                return false;
        }
        return true;
    }

    @Override
    public void onDestroyActionMode(ActionMode actionMode) {
        //ActionMode退出时会调用该方法

    }
}

这个是item的布局文件

<com.example.mhyuam.actionmode.ContextListItem
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="?android:attr/listPreferredItemHeightSmall"
    android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
    android:paddingRight="?android:attr/listPreferredItemPaddingRight"
    android:background="?android:attr/activatedBackgroundIndicator">
    "@+id/text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textAppearance="?android:attr/textAppearanceListItemSmall"
        android:layout_gravity="center_vertical"/>
    "@+id/context"
        android:layout_width="?android:attr/listPreferredItemHeightSmall"
        android:layout_height="match_parent"
        style="@style/Widget.AppCompat.ActionButton.Overflow"
        android:clickable="true"
        android:focusable="false"/>
com.example.mhyuam.actionmode.ContextListItem>

                                    END