Android弹出菜单【转】
来源:互联网 发布:房地产知乎 编辑:程序博客网 时间:2024/06/05 21:02
来自:http://blog.csdn.net/ywl5320/article/details/47160059
在实际开发中,我们可能会用到toolbar控件,然后还要在右上角添加弹出菜单,但是toolbar弹出菜单,实在是不好控制位置,因此用户体验很是不好,所以 就想到了用popupwindow来代替弹出的菜单。话不多说先看效果(文章末尾有demo下载地址):
效果还是基本能接受的。
下面讲讲实现过程:
一:菜单布局,很简单,和一般的布局一样,linearlayout中包裹textview和imageview(需要图片的话)
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:gravity="center_horizontal"
- android:background="@drawable/icon_popupwin_menu_bg"
- android:orientation="vertical" >
- <LinearLayout
- android:id="@+id/ly_item1"
- android:layout_width="match_parent"
- android:layout_height="45dip"
- android:gravity="center_vertical"
- android:orientation="horizontal"
- android:background="@drawable/bg_default_button_selector">
-
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textSize="15sp"
- android:paddingLeft="20dip"
- android:textColor="#595d5f"
- android:text="选项卡一" />
-
- </LinearLayout>
- <View
- android:layout_width="match_parent"
- android:layout_height="1dip"
- android:background="#eeeeee" />
- <LinearLayout
- android:id="@+id/ly_item2"
- android:layout_width="match_parent"
- android:layout_height="45dip"
- android:gravity="center_vertical"
- android:orientation="horizontal"
- android:background="@drawable/bg_default_button_selector">
-
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:paddingLeft="20dip"
- android:paddingRight="20dip"
- android:visibility="gone" />
-
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textSize="15sp"
- android:paddingLeft="20dip"
- android:textColor="#595d5f"
- android:text="选项卡二" />
- </LinearLayout>
- <View
- android:layout_width="match_parent"
- android:layout_height="1dip"
- android:background="#eeeeee" />
- <LinearLayout
- android:id="@+id/ly_item3"
- android:layout_width="match_parent"
- android:layout_height="45dip"
- android:gravity="center_vertical"
- android:orientation="horizontal"
- android:background="@drawable/bg_default_button_selector" >
-
- <ImageView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:paddingLeft="20dip"
- android:paddingRight="20dip"
- android:visibility="gone" />
-
- <TextView
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:textSize="15sp"
- android:paddingLeft="20dip"
- android:textColor="#595d5f"
- android:text="选项卡三" />
- </LinearLayout>
-
- </LinearLayout>
这里用了标题栏和点击变色效果,这不是这次的重点,所以就不说了,不懂可以在博客最后下载demo来看,hh~
二:继承PopupWindow实现自己的菜单主要是添加布局文件,设置布局文件位置,并未选项添加点击回调接口,代码如下,注释也详细:
- package com.ywl5320.popupmenu;
-
- import android.app.Activity;
- import android.content.Context;
- import android.graphics.drawable.ColorDrawable;
- import android.view.LayoutInflater;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.LinearLayout.LayoutParams;
- import android.widget.PopupWindow;
-
- public class PopupMenu extends PopupWindow implements OnClickListener {
-
- private Activity activity;
- private View popView;
-
- private View v_item1;
- private View v_item2;
- private View v_item3;
-
- private OnItemClickListener onItemClickListener;
-
-
-
-
-
- public enum MENUITEM {
- ITEM1, ITEM2, ITEM3
- }
-
- public PopupMenu(Activity activity) {
- super(activity);
- this.activity = activity;
- LayoutInflater inflater = (LayoutInflater) activity
- .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
- popView = inflater.inflate(R.layout.popup_menu, null);
- this.setContentView(popView);
- this.setWidth(dip2px(activity, 120));
- this.setHeight(LayoutParams.WRAP_CONTENT);
- this.setFocusable(true);
- this.setTouchable(true);
- this.setOutsideTouchable(true);
- ColorDrawable dw = new ColorDrawable(0x00000000);
- this.setBackgroundDrawable(dw);
-
-
- v_item1 = popView.findViewById(R.id.ly_item1);
- v_item2 = popView.findViewById(R.id.ly_item2);
- v_item3 = popView.findViewById(R.id.ly_item3);
-
- v_item1.setOnClickListener(this);
- v_item2.setOnClickListener(this);
- v_item3.setOnClickListener(this);
-
- }
-
-
-
-
-
-
-
-
- public void showLocation(int resourId) {
- showAsDropDown(activity.findViewById(resourId), dip2px(activity, 0),
- dip2px(activity, -8));
- }
-
- @Override
- public void onClick(View v) {
-
- MENUITEM menuitem = null;
- String str = "";
- if (v == v_item1) {
- menuitem = MENUITEM.ITEM1;
- str = "选项卡一";
- } else if (v == v_item2) {
- menuitem = MENUITEM.ITEM2;
- str = "选项卡二";
- } else if (v == v_item3) {
- menuitem = MENUITEM.ITEM3;
- str = "选项卡三";
- }
- if (onItemClickListener != null) {
- onItemClickListener.onClick(menuitem, str);
- }
- dismiss();
- }
-
-
- public int dip2px(Context context, float dipValue) {
- final float scale = context.getResources().getDisplayMetrics().density;
- return (int) (dipValue * scale + 0.5f);
- }
-
-
- public interface OnItemClickListener {
- public void onClick(MENUITEM item, String str);
- }
-
-
- public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
- this.onItemClickListener = onItemClickListener;
- }
-
- }
三:然后在MainActivity中调用:初始化菜单,然后设置菜单位置,添加回调就OK了
- package com.ywl5320.popupmenu;
-
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.ImageView;
- import android.widget.Toast;
-
- import com.ywl5320.popupmenu.PopupMenu.MENUITEM;
- import com.ywl5320.popupmenu.PopupMenu.OnItemClickListener;
-
- public class MainActivity extends Activity {
-
- private ImageView iv_menu;
- private PopupMenu popupMenu;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
-
- popupMenu = new PopupMenu(this);
-
- iv_menu = (ImageView) findViewById(R.id.iv_menu);
-
- iv_menu.setOnClickListener(new OnClickListener() {
-
- @Override
- public void onClick(View v) {
-
- popupMenu.showLocation(R.id.iv_menu);
-
- popupMenu.setOnItemClickListener(new OnItemClickListener() {
-
- @Override
- public void onClick(MENUITEM item, String str) {
-
- Toast.makeText(MainActivity.this, str, 0).show();
- }
- });
- }
- });
- }
- }
我们还是看看title的布局吧,也很简单:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="55dip"
- android:background="#262a3b">
-
- <ImageView
- android:id="@+id/iv_back"
- android:layout_width="50dip"
- android:layout_height="match_parent"
- android:layout_alignParentLeft="true"
- android:layout_centerVertical="true"
- android:scaleType="centerInside"
- android:visibility="invisible"/>
-
- <TextView
- android:id="@+id/tv_title"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:singleLine="true"
- android:layout_toLeftOf="@+id/iv_menu"
- android:layout_toRightOf="@+id/iv_back"
- android:gravity="center"
- android:text="标题栏"
- android:textColor="#ffffff"
- android:textSize="22sp"
- android:layout_centerInParent="true"/>
-
- <ImageView
- android:id="@+id/iv_menu"
- android:layout_width="50dip"
- android:layout_height="match_parent"
- android:layout_alignParentRight="true"
- android:layout_centerVertical="true"
- android:scaleType="centerInside"
- android:src="@drawable/menu_icon"/>
- </RelativeLayout>
这样就实现了右上角弹出菜单,其实不止是在右上角,可以再任意位置弹出菜单,微信点赞那种也可以,好了,就到这里了:Demo下载 0 0