Android高手之路之popUpWindow的顯示與關閉

標籤：

popWIndow的效果就類似一個固定的小視窗。直接看效果吧

效果：

主要代碼：

package com.example.popupwindowdemo;import android.os.Bundle;import android.app.Activity;import android.app.ActionBar.LayoutParams;import android.util.Log;import android.view.Gravity;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.PopupWindow;public class MainActivity extends Activity implements OnClickListener{private Button btn_show,btn_close;private PopupWindow mPopupWindow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);btn_show = (Button)findViewById(R.id.btn_show);btn_show.setOnClickListener(this);btn_close = (Button)findViewById(R.id.btn_close);btn_close.setOnClickListener(this);}@Overridepublic 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;}@Overridepublic void onClick(View v) {switch (v.getId()) {case  R.id.btn_show:if(null == mPopupWindow || !mPopupWindow.isShowing()){LayoutInflater mLayoutInflater = (LayoutInflater) this              .getSystemService(LAYOUT_INFLATER_SERVICE); View music_popunwindwow = mLayoutInflater.inflate(              R.layout.music_popwindow, null);  mPopupWindow = new PopupWindow(music_popunwindwow,LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT); mPopupWindow.showAtLocation(findViewById(R.id.main), Gravity.RIGHT|Gravity.BOTTOM, 0, 0);}break;case R.id.btn_close:if(null != mPopupWindow && mPopupWindow.isShowing()){mPopupWindow.dismiss();if(null == mPopupWindow){Log.e("MainActivity","null == mPopupWindow");}}break;default:break;}}}

activity_main.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/main"    android:orientation="horizontal"    >    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/btn_show"        android:text="show" />    <Button         android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/btn_close"        android:text="close"/></LinearLayout>

music_popwindow.xml：

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#77777777"
    android:orientation="vertical" >
    <Button android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right"
        android:text="like"/>


</LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:background="#77777777"    android:orientation="vertical" >    <Button android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="right"        android:text="like"/></LinearLayout>

Android高手之路之popUpWindow的顯示與關閉