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Android中popWindow弹出菜单的编写
1、什么是popWindow?
popWindow就是对话框的一种方式!此文讲解的android中对话框的一种使用方式,它叫popWindow。
2、popWindow的特性
Android的对话框有两种:PopupWindow和AlertDialog。它们的不同点在于:
AlertDialog的位置固定,而PopupWindow的位置可以随意。
AlertDialog是非阻塞线程的,而PopupWindow是阻塞线程的。
PopupWindow的位置按照有无偏移分,可以分为偏移和无偏移两种;按照参照物的不同,可以分为相对于某个控件(Anchor锚)和相对于父控件。具体如下
showAsDropDown(View anchor):相对某个控件的位置(正左下方),无偏移
showAsDropDown(View anchor, int xoff, int yoff):相对某个控件的位置,有偏移
showAtLocation(View parent, int gravity, int x, int y):相对于父控件的位置(例如正中央Gravity.CENTER,下方Gravity.BOTTOM等),可以设置偏移或无偏移
3、popWindow的设计
效果图:
实现这个效果的,总共有两个三个xml布局,一个是工具栏布局,一个是popWindow布局,一个是父界面布局。
工具栏布局:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="@dimen/chat_llyt_title_height" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:background="@color/black" android:orientation="horizontal" > <ImageView android:id="@+id/app_iv_back" android:layout_width="@dimen/chat_llyt_title_height" android:layout_height="fill_parent" android:background="@drawable/actionbar_bg_left" android:layout_gravity="center" android:padding="7dip" android:scaleType="centerInside" /> <TextView android:id="@+id/app_tv_barname" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="4.0" android:background="@drawable/actionbar_bg_middle" android:gravity="center" android:text="@string/app_name" android:textColor="@color/white" android:textSize="@dimen/wc_title_textsize" /> <ImageView android:id="@+id/app_iv_search" android:layout_width="@dimen/chat_llyt_title_height" android:layout_height="fill_parent" android:background="@drawable/actionbar_bg_right" android:padding="7dip" android:layout_gravity="center" android:scaleType="centerInside" android:src=http://www.mamicode.com/"@drawable/yuyou_bg_pop" />>
popWindow布局:<?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/rlyt_menu" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <View android:layout_width="0dp" android:layout_height="0dp" android:layout_weight="9" /> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="2" android:orientation="vertical" > <View android:layout_width="0dp" android:layout_height="0dp" android:layout_weight="0.05" /> <LinearLayout android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="2.3" android:background="@drawable/yuyou_pop_menu" android:orientation="vertical" > <View android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="0.1" /> <LinearLayout android:id="@+id/rlyt_code" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:orientation="vertical" > <ImageView android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:contentDescription="@drawable/face_code_bg" android:paddingLeft="10dp" android:paddingRight="10dp" android:src=http://www.mamicode.com/"@drawable/face_code_bg">
父界面布局:<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="@dimen/chat_llyt_title_height" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:background="@color/black" android:orientation="horizontal" > <ImageView android:id="@+id/app_iv_back" android:layout_width="@dimen/chat_llyt_title_height" android:layout_height="fill_parent" android:background="@drawable/actionbar_bg_left" android:layout_gravity="center" android:padding="7dip" android:scaleType="centerInside" /> <TextView android:id="@+id/app_tv_barname" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="4.0" android:background="@drawable/actionbar_bg_middle" android:gravity="center" android:text="@string/app_name" android:textColor="@color/white" android:textSize="@dimen/wc_title_textsize" /> <ImageView android:id="@+id/app_iv_search" android:layout_width="@dimen/chat_llyt_title_height" android:layout_height="fill_parent" android:background="@drawable/actionbar_bg_right" android:padding="7dip" android:layout_gravity="center" android:scaleType="centerInside" android:src=http://www.mamicode.com/"@drawable/yuyou_bg_pop" />>对话框类,继承OnClickListener,对点击事件的相应:package com.example.popwindow; import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup.LayoutParams; import android.widget.PopupWindow; public class MySimplePopMenu implements OnClickListener { private final PopupWindow popupWindow; private Activity mParent; public MySimplePopMenu(Activity mParent, int hight) { this.mParent = mParent; View menu = initMenuView(mParent); popupWindow = new PopupWindow(menu); popupWindow.setWidth(LayoutParams.MATCH_PARENT); popupWindow.setHeight(hight); popupWindow.setAnimationStyle(R.style.PopAnimation); } /** * 设置具体Menu按钮的监听 * * @param mParent * @return */ private View initMenuView(Activity mParent) { View menuView = mParent.getLayoutInflater().inflate( R.layout.my_simple_popupwindow_menu, null); menuView.findViewById(R.id.rlyt_menu).setOnClickListener(this); menuView.findViewById(R.id.rlyt_code).setOnClickListener(this); menuView.findViewById(R.id.rlyt_his).setOnClickListener(this); return menuView; } @Override public void onClick(View view) { switch (view.getId()) { // 点击空白处 case R.id.rlyt_menu: if (popupWindow != null && popupWindow.isShowing()) { popupWindow.dismiss(); } break; // 扫一扫 case R.id.rlyt_code: break; // 历史记录 case R.id.rlyt_his: break; } } /** * 返回View * * @return */ public PopupWindow getMenu() { return popupWindow; } }
这段代码中的popupWindow.setAnimationStyle(R.style.PopAnimation);这行代码需要特别注意,作用于对话框的弹出效果,如何使用可关注的我的博文:http://blog.csdn.net/stoppig/article/details/21481057。使用原理是差不多的。
主activity代码:package com.example.popwindow; import android.os.Bundle; import android.app.Activity; import android.content.Context; import android.view.Display; import android.view.Gravity; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.view.WindowManager; import android.view.View.OnClickListener; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.PopupWindow; import android.widget.RelativeLayout; public class MainActivity extends Activity { private MySimplePopMenu popMenu;// 弹出选择框 private PopupWindow mPopupWindow; // 弹出框 private ImageView app_iv_search; private boolean mIsFirst = true; // 是否第一次初始化弹出框 private Context mContext; private RelativeLayout mLayout; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViews(); initListener(); this.mContext = this; } private void findViews() { app_iv_search = (ImageView) findViewById(R.id.app_iv_search); mLayout = (RelativeLayout) findViewById(R.id.rv_main); } private void initListener() { app_iv_search.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub if (mIsFirst) { mIsFirst = false; int height = mLayout.getHeight() - v.getHeight(); popMenu = new MySimplePopMenu(MainActivity.this, height); mPopupWindow = popMenu.getMenu(); } if (mPopupWindow == null) { return; } if (mPopupWindow.isShowing()) { mPopupWindow.dismiss(); return; } mPopupWindow.showAtLocation(mLayout, Gravity.BOTTOM, 0, 0); } }); } /** * 获取屏幕高度 * * @param context * @return */ private int getScreenHeight(Context context) { WindowManager manager = (WindowManager) context .getSystemService(Context.WINDOW_SERVICE); Display display = manager.getDefaultDisplay(); return display.getHeight(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }
ps:这段代码mIsFirst这个属性是特别注意的,这个属性控制着对话框弹出的次数,如果没有进行控制,每点一次就会弹出一次。
主要代码就这样差不多了。资源地址请点击:下载资源。