Question

我有一个我正在编写的应用程序，它已包含很多代码，我决定要在主活动工具栏中添加导航抽屉，但我不知道如何在不创建新的导航抽屉的情况下执行此操作项目并将我的整个项目复制到它看似很多工作，是否有一个教程将导航抽屉添加到现有项目？

Answer 1

创建布局 layout_left_menu.xml ：

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

<ImageView android:id="@+id/header"
    android:src="@drawable/ic_launcher"
    android:layout_width="48dp"
    android:layout_height="48dp"
    android:layout_marginTop="26dp"
    android:layout_marginBottom="8dp"
    android:layout_marginLeft="30dp"
    android:layout_marginStart="40dp"/>

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="48dp"
    android:layout_marginTop="26dp"
    android:layout_marginLeft="10dp"
    android:layout_toRightOf="@id/header">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_centerInParent="true">
        <TextView
            android:id="@+id/userName"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/app_name"
            android:textColor="@color/pressed"/>
        <TextView
            android:id="@+id/userEmail"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/app_name"
            android:layout_below="@id/userName"
            android:layout_centerInParent="true"
            android:textColor="@color/pressed"
            android:visibility="gone"/>
    </LinearLayout>
</RelativeLayout>

<ListView android:id="@+id/menu_items_list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/header"
    android:dividerHeight="0dp"
    android:divider="@null"
    android:background="@color/bgLeftMenu"/>

<ProgressBar android:id="@+id/progress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    android:visibility="gone"/>

在自定义视图中对其进行充气：

public class SimpleLeftMenuView extends NavigationView {
    private LayoutInflater mInflater;
    private Context mContext;

    private ListView mItemsList;
    private MenuItemsAdapter mItemsAdapter;
    private ProgressBar mProgress;

    private OnClickMenu mListener;

    private ImageView mHeader;
    private TextView userName;
    private TextView userEmail;

    //region Constructors
    public SimpleLeftMenuView(Context context) {
        super(context);
        mContext = context;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        initLayout();

        setData();
    }

    public SimpleLeftMenuView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        initLayout();

        setData();
    }

    public SimpleLeftMenuView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mContext = context;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        initLayout();

        setData();
    }
    //endregion

    private void initLayout(){
        mInflater.inflate(R.layout.layout_left_menu, this);
        mItemsList = (ListView) findViewById(R.id.menu_items_list);
        mProgress = (ProgressBar) findViewById(R.id.progress);

        mHeader = (ImageView) findViewById(R.id.header);
        userName = (TextView) findViewById(R.id.userName);
        userEmail = (TextView) findViewById(R.id.userEmail);

        mHeader.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // do something
            }
        });
    }

    public void setSelectedSection(String idSection) {
        mItemsAdapter.setLastSelectedSection(idSection);
    }

    public void setmListener(OnClickMenu mListener) {
        this.mListener = mListener;
    }

    private void setData() {

        List<String> sections = new ArrayList<>();

        sections.add(mContext.getString(R.string.home_id));
        sections.add(mContext.getString(R.string.login_id));
        sections.add(mContext.getString(R.string.settings_id));
        //.........
        //sections.add(mContext.getString(R.string.exit_id));

        mItemsAdapter = new MenuItemsAdapter(mContext, sections, new OnClickMenu() {
            @Override
            public void onClick(String id) {
                mItemsAdapter.setLastSelectedSection(id);

                if (mListener != null)
                    mListener.onClick(id);
            }
        });
        mItemsList.setAdapter(mItemsAdapter);
        mItemsList.setSelection(0);
        mItemsList.setItemChecked(0, true);
    }
}

您必须创建MenuItemAdapter。

    public class MenuItemsAdapter extends BaseAdapter {

    private Context mContext;
    private static String lastSelectedSection;

    private List<String> mSections;
    private int currentTextcolor;
    private OnClickMenu mListener;

    public MenuItemsAdapter(Context context, List<String> sections, OnClickMenu listener) {
        mContext = context;
        mSections = sections;
        mListener = listener;

        lastSelectedSection = sections.get(0);
    }

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

    @Override
    public String getItem(int position) {
        return mSections.get(position);
    }

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

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        return getCustomView(position, convertView, parent);
    }

    public View getCustomView(final int position, View convertView, ViewGroup parent) {
        final MenuItemHolder holder;

        if (convertView==null){

            LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
            convertView = inflater.inflate(R.layout.layout_left_menu_item, parent, false);
            holder = new MenuItemHolder(convertView);


            convertView.setTag(holder);

        }else {

            holder = (MenuItemHolder) convertView.getTag();

        }

        Resources r = mContext.getResources();
        int pxMarginSection = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 8, r.getDisplayMetrics());

        holder.position = position;

        holder.mLine.setVisibility(View.GONE);
        holder.mTitle.setTextColor(mContext.getResources().getColor(R.color.primary));
        holder.mIconView.setColorFilter(mContext.getResources().getColor(R.color.primary));

        if (mSections.get(position).equals(mContext.getString(R.string.login_id))) {
            holder.mIconView.setImageResource(R.drawable.ic_login_gp);
            // holder.mIconView.setColorFilter(mContext.getResources().getColor(R.color.primary));
            holder.mTitle.setText(mContext.getString(R.string.action_login));
            holder.mLine.setVisibility(View.VISIBLE);
            holder.mLayoutItem.setPadding(0, pxMarginSection, 0, pxMarginSection);
        } else if (mSections.get(position).equals(mContext.getString(R.string.settings_id))) {
            holder.mIconView.setImageResource(R.drawable.option);
            holder.mTitle.setText(mContext.getString(R.string.action_settings));
            holder.mLayoutItem.setPadding(0, pxMarginSection, 0, pxMarginSection);
            holder.mLine.setVisibility(View.VISIBLE);
        } else if (mSections.get(position).equals(mContext.getString(R.string.exit_id))) {
            holder.mIconView.setImageResource(R.drawable.shutdown);
            holder.mTitle.setText(mContext.getString(R.string.salir));
            holder.mLayoutItem.setPadding(0, pxMarginSection, 0, pxMarginSection);
            holder.mLine.setVisibility(View.VISIBLE);
        }

        holder.mLayoutItem.setOnTouchListener(new View.OnTouchListener() {
            @Override
            public boolean onTouch(View view, MotionEvent motionEvent) {

                switch (motionEvent.getActionMasked()){
                    case MotionEvent.ACTION_DOWN:
                        currentTextcolor = holder.mTitle.getCurrentTextColor();
                        holder.mLayoutItemSelect.setBackgroundColor(mContext.getResources().getColor(R.color.primary));
                        holder.mTitle.setTextColor(mContext.getResources().getColor(R.color.text_info));
                        holder.mIconView.setColorFilter(mContext.getResources().getColor(R.color.text_info));
                        return true;


                    case MotionEvent.ACTION_UP:

                        holder.mLayoutItemSelect.setBackgroundResource(R.color.bgLeftMenu);
                        holder.mTitle.setTextColor(currentTextcolor);
                        holder.mIconView.setColorFilter(mContext.getResources().getColor(R.color.primary));

                        mListener.onClick(mSections.get(position));
                        return true;

                    case MotionEvent.ACTION_CANCEL:

                        holder.mLayoutItemSelect.setBackgroundColor(mContext.getResources().getColor(R.color.bgLeftMenu));
                        holder.mTitle.setTextColor(currentTextcolor);
                        holder.mIconView.setColorFilter(mContext.getResources().getColor(R.color.primary));

                        return true;

                }

                return false;
            }
        });

        return convertView;

    }

    class MenuItemHolder {

        // butterKnife
        View view;
        @Bind(R.id.title)
        TextView mTitle;
        @Bind(R.id.icon)
        ImageView mIconView;
        @Bind(R.id.layoutItem)
        LinearLayout mLayoutItem;
        @Bind (R.id.rl_line)
        View mLine;
        @Bind(R.id.layoutItemSelect)
        LinearLayout mLayoutItemSelect;

        int position;

        public MenuItemHolder(View itemView) {
            ButterKnife.bind(this, itemView);
            view = itemView;
        }

    }

    public void setLastSelectedSection(String idSection) {
        lastSelectedSection = idSection;
    }
}

现在你必须修改你当前的活动：

更改主活动布局以使用DrawerLayout并添加自定义视图“LeftMenuView”：

<android.support.v4.widget.DrawerLayout
android:id="@+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#EDEDED">

// YOUR CURRENT LAYOUT

<yourpackage.custom.LeftMenuView
    android:id="@+id/navigation_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:background="@color/bgLeftMenu"/>


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

活动类：

添加全局变量：

protected @Bind(R.id.navigation_view) LeftMenuView mLeftMenuView;
protected @Bind(R.id.drawerLayout) DrawerLayout mDrawerLayout;

设置onclick监听器。你可以做一个动作取决于id：

mLeftMenuView.setmListener(new OnClickMenu() {
        @Override
        public void onClick(String id) {
            Log.d("MENU", "ic_menu_hamburger clicked: " + id);

            closeDrawer(null);

            if (id.equals(getString(R.string.settings_id))) {
                Intent intent = new Intent(MainActivity.this,
                        SettingsActivity.class);
                MainActivity.this.startActivity(intent);
            } else if (id.equals(getString(R.string.exit_id))) {
                // salir
                showRateDialogBeforeExit();
            }

        }
    });

我创建了自己的界面OnClickMenu：

public interface OnClickMenu {

   void onClick(String id);

}

并从菜单图标中添加操作以打开抽屉：

@Override
public void onBackPressed() {
    if((mDrawerLayout) != null && (mDrawerLayout.isDrawerOpen(GravityCompat.START)))
        closeDrawer(null);
    else {
        super.onBackPressed();
    }
}

public void closeDrawer(DrawerLayout.DrawerListener listener) {
    mDrawerLayout.setDrawerListener(listener);
    mDrawerLayout.closeDrawers();
}

public void openDrawer() {
    mDrawerLayout.setDrawerListener(null);
    mDrawerLayout.openDrawer(GravityCompat.START);
}

菜单：

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.menu_home, menu);

    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            openDrawer();
            return true;
    }
    return super.onOptionsItemSelected(item);
}

Answer 2

最简单的方法是使用this库。

它非常容易实现，而且非常灵活。

如果您想自己动手，请考虑阅读有关创建导航抽屉的官方docs。

Answer 3

我已经尝试了@ Yury-dombaev建议的MaterialDrawer库，并且我不得不承认，它比正式的Navigation Drawer易于实现。

可以用Android X依赖关系或普通的依赖关系实现。

在我的情况下，由于我有普通的，所以我必须坚持使用MaterialDrawer 6.0.9v。尽管有一个迁移指南，我会看一下。

要在当前活动中实施该库，请执行以下操作：

按照库v 6.0.9的设置1中的说明，在应用程序build.gradle中添加依赖项：https://github.com/mikepenz/MaterialDrawer/tree/v6.0.9
在onCreate：Activity的{{1}}（）方法中添加抽屉。
现在，您有了基本（无用）的横向菜单。现在是时候继续阅读Material Drawer文档并添加菜单元素了：）

将导航抽屉添加到现有活动

3 个答案: