Android_PopupWindow提示框

Mainactivity.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:orientation="vertical" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="showpopup" android:text="显示popupwindow" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="showpopup_two" android:text="显示popupwindow(三个参数)" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="showpopup_three" android:text="显示popupwindow(showAtLocation)" /> </LinearLayout>

popupwindow.XML

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="200dp" android:layout_height="200dp" android:orientation="vertical" > <Button android:id="@+id/toast" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="弹出吐司" /> <Button android:id="@+id/close" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="关闭" /> </LinearLayout>

MainActivity

package com.bwei.day_11_popupwindow; import android.app.Activity; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.PopupWindow; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { private PopupWindow popupWindow; // private View view; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //加载popupwindow View view = View.inflate(MainActivity.this, R.layout.popupwindow, null); popupWindow = new PopupWindow(view, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); // 设置popupwindow点击窗体外可以消失;但必须要给popupwindow设置背景 popupWindow.setOutsideTouchable(true); // 给popupwindow设置背景颜色 popupWindow.setBackgroundDrawable(new ColorDrawable(Color.YELLOW)); //监听 Button toast = (Button) view.findViewById(R.id.toast); Button close = (Button) view.findViewById(R.id.close); toast.setOnClickListener(this); close.setOnClickListener(this); } //3种显示 public void showpopup(View v) { System.out.println(popupWindow.isShowing()); // 判断popupwindow是否在显示 if (!popupWindow.isShowing()) { popupWindow.showAsDropDown(v); } } public void showpopup_two(View v) { // 判断popupwindow是否在显示 if (!popupWindow.isShowing()) { // 参数一:popupwindow显示时的参照控件,参数二:X轴的偏移量,参数三:Y轴的偏移量 popupWindow.showAsDropDown(v, 100, 200); } } public void showpopup_three(View v) { // 参数一:popupwindow的父窗体.参数二:popupwindow显示时的相对位置,参数三:X轴的偏移量,参数四:Y轴的偏移量 popupWindow.showAtLocation(v, Gravity.LEFT, 0, 0); } //popupWindow内部 @Override public void onClick(View v) { switch (v.getId()) { // 弹出吐司 case R.id.toast: Toast.makeText(MainActivity.this, "点击popupwindow内部按钮弹出的", 1).show(); break; // 关闭popupwindow case R.id.close: // 关闭popupwindows popupWindow.dismiss(); break; } } }