Android 自定义Toolbar的Menu菜单

原创文章，如有转载，请注明出处：http://blog.youkuaiyun.com/myth13141314/article/details/64158122

Toolbar 的使用也比较频繁，定制Toolbar的方法一般可以通过在布局中直接添加自己的布局，也可以利用app:actionProviderClass这个属性，现在记录下利用app:actionProviderClass属性自定义Toolbar的Menu菜单的方法

效果图

初始化Toolbar menu

• menu布局

<menu xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto"
   >

   <item
       android:id="@+id/action_search"
       android:title="search"
       android:icon="@mipmap/nav_search"
       app:actionViewClass="android.support.v7.widget.SearchView"
       app:showAsAction="always|collapseActionView"/>

   <item
       android:id="@+id/action_download"
       android:icon="@drawable/selector_toolbar_download"
       android:title="@string/menu_download"
       app:showAsAction="always"
       app:actionProviderClass="com.snowdream.myapplication.widget.ToolbarDownloadActionProvider"
       />
</menu>

app:actionProviderClass  自定义的类名
app:showAsAction   menu菜单的显示方式

附上app:showAsAction的官网解释

• 代码的初始化

//初始化Menu的布局
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

//Menu的点击事件
@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();

    //noinspection SimplifiableIfStatement
    switch (id) {
        case android.R.id.home:
            return true;
        case R.id.action_search://搜索，根据需要显示/隐藏下载按钮
            boolean visible = toolbar.getMenu().findItem(R.id.action_download).isVisible();
            toolbar.getMenu().findItem(R.id.action_download).setVisible(!visible);
            return true;
        case R.id.action_download://下载     
            return true;
    }

    return super.onOptionsItemSelected(item);
}

定制Menu的下载按钮

• 布局

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:background="?actionBarItemBackground"
    ><!--引用系统默认Toolbar/ActionBar的Menu的点击效果-->

    <ImageView
        android:id="@+id/iv_menu_download"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="center"
        android:src="@drawable/selector_toolbar_download"
        android:layout_centerInParent="true"
        android:layout_marginRight="20dp"
        />

    <TextView
        android:id="@+id/tv_menu_download_count"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:background="@drawable/shape_toolbar_little_num_bg"
        android:gravity="center"
        android:text="12"
        android:textColor="#ea4235"
        android:textSize="12dp"
        android:layout_marginTop="8dp"
        android:layout_marginLeft="28dp"
        />

</RelativeLayout>

• 代码

public class ToolbarDownloadActionProvider extends ActionProvider {

    private TextView tagTextView;

    //点击监听的接口，用于调用者的回调
    private OnMenuClickListener onMenuClickListener;
    public interface OnMenuClickListener{
        void onClick();
    }

    public ToolbarDownloadActionProvider(Context context) {
        super(context);
    }

    //初始化布局
    @Override
    public View onCreateActionView() {
        //读取support下Toolbar/ActionBar的高度
        int size = getContext().getResources().getDimensionPixelSize(android.support.design.R.dimen.abc_action_bar_default_height_material);

        ViewGroup.LayoutParams layoutParams = new ViewGroup.LayoutParams(size, size);

        View view = LayoutInflater.from(getContext()).inflate(R.layout.cell_toolbar_download, null);
        view.setLayoutParams(layoutParams);
        tagTextView = (TextView) view.findViewById(R.id.tv_menu_download_count);
        view.setOnClickListener(onViewClickListener);

        return view;
    }

    private View.OnClickListener onViewClickListener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (onMenuClickListener != null)
                onMenuClickListener.onClick();
        }
    };

    public void setOnMenuClickListener(OnMenuClickListener onMenuClickListener) {
        this.onMenuClickListener = onMenuClickListener;
    }

    //对外提供一些需要的接口
    public void showTagTextView(String tag) {
        tagTextView.setText(tag);
        tagTextView.setVisibility(View.VISIBLE);
    }

    public void hideTagTextView() {
        tagTextView.setVisibility(View.GONE);
    }
}