本實例彈出窗口主要是繼承PopupWindow類來實現的彈出窗體,佈局可以根據自己定義設計。彈出效果主要使用了translate和alpha樣式實現,具體實習如下:
第一步:設計彈出窗口xml:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:gravity="center_horizontal"
- android:orientation="vertical"
- >
- <LinearLayout
- android:id="@+id/pop_layout"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:gravity="center_horizontal"
- android:orientation="vertical"
- android:layout_alignParentBottom="true"
- android:background="@drawable/btn_style_alert_dialog_background"
- >
- <Button
- android:id="@+id/btn_take_photo"
- android:layout_marginLeft="20dip"
- android:layout_marginRight="20dip"
- android:layout_marginTop="20dip"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="拍照"
- android:background="@drawable/btn_style_alert_dialog_button"
- android:textStyle="bold"
- />
- <Button
- android:id="@+id/btn_pick_photo"
- android:layout_marginLeft="20dip"
- android:layout_marginRight="20dip"
- android:layout_marginTop="5dip"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="從相冊選擇"
- android:background="@drawable/btn_style_alert_dialog_button"
- android:textStyle="bold"
- />
- <Button
- android:id="@+id/btn_cancel"
- android:layout_marginLeft="20dip"
- android:layout_marginRight="20dip"
- android:layout_marginTop="15dip"
- android:layout_marginBottom="15dip"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="取消"
- android:background="@drawable/btn_style_alert_dialog_cancel"
- android:textColor="#ffffff"
- android:textStyle="bold"
- />
- </LinearLayout>
- </RelativeLayout>
第二步:創建SelectPicPopupWindow類繼承PopupWindow:
- import android.app.Activity;
- import android.content.Context;
- import android.graphics.drawable.ColorDrawable;
- import android.view.LayoutInflater;
- import android.view.MotionEvent;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.view.View.OnTouchListener;
- import android.view.ViewGroup.LayoutParams;
- import android.widget.Button;
- import android.widget.PopupWindow;
- public class SelectPicPopupWindow extends PopupWindow {
- private Button btn_take_photo, btn_pick_photo, btn_cancel;
- private View mMenuView;
- public SelectPicPopupWindow(Activity context,OnClickListener itemsOnClick) {
- super(context);
- LayoutInflater inflater = (LayoutInflater) context
- .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
- mMenuView = inflater.inflate(R.layout.alert_dialog, null);
- btn_take_photo = (Button) mMenuView.findViewById(R.id.btn_take_photo);
- btn_pick_photo = (Button) mMenuView.findViewById(R.id.btn_pick_photo);
- btn_cancel = (Button) mMenuView.findViewById(R.id.btn_cancel);
- //取消按鈕
- btn_cancel.setOnClickListener(new OnClickListener() {
- public void onClick(View v) {
- //銷燬彈出框
- dismiss();
- }
- });
- //設置按鈕監聽
- btn_pick_photo.setOnClickListener(itemsOnClick);
- btn_take_photo.setOnClickListener(itemsOnClick);
- //設置SelectPicPopupWindow的View
- this.setContentView(mMenuView);
- //設置SelectPicPopupWindow彈出窗體的寬
- this.setWidth(LayoutParams.FILL_PARENT);
- //設置SelectPicPopupWindow彈出窗體的高
- this.setHeight(LayoutParams.WRAP_CONTENT);
- //設置SelectPicPopupWindow彈出窗體可點擊
- this.setFocusable(true);
- //設置SelectPicPopupWindow彈出窗體動畫效果
- this.setAnimationStyle(R.style.AnimBottom);
- //實例化一個ColorDrawable顏色爲半透明
- ColorDrawable dw = new ColorDrawable(0xb0000000);
- //設置SelectPicPopupWindow彈出窗體的背景
- this.setBackgroundDrawable(dw);
- //mMenuView添加OnTouchListener監聽判斷獲取觸屏位置如果在選擇框外面則銷燬彈出框
- mMenuView.setOnTouchListener(new OnTouchListener() {
- public boolean onTouch(View v, MotionEvent event) {
- int height = mMenuView.findViewById(R.id.pop_layout).getTop();
- int y=(int) event.getY();
- if(event.getAction()==MotionEvent.ACTION_UP){
- if(y<height){
- dismiss();
- }
- }
- return true;
- }
- });
- }
- }
第三步:編寫MainActivity類實現測試:
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.Gravity;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.TextView;
- public class MainActivity extends Activity {
- //自定義的彈出框類
- SelectPicPopupWindow menuWindow;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- TextView tv = (TextView) this.findViewById(R.id.text);
- //把文字控件添加監聽,點擊彈出自定義窗口
- tv.setOnClickListener(new OnClickListener() {
- public void onClick(View v) {
- //實例化SelectPicPopupWindow
- menuWindow = new SelectPicPopupWindow(MainActivity.this, itemsOnClick);
- //顯示窗口
- menuWindow.showAtLocation(MainActivity.this.findViewById(R.id.main), Gravity.BOTTOM|Gravity.CENTER_HORIZONTAL, 0, 0); //設置layout在PopupWindow中顯示的位置
- }
- });
- }
- //爲彈出窗口實現監聽類
- private OnClickListener itemsOnClick = new OnClickListener(){
- public void onClick(View v) {
- menuWindow.dismiss();
- switch (v.getId()) {
- case R.id.btn_take_photo:
- break;
- case R.id.btn_pick_photo:
- break;
- default:
- break;
- }
- }
- };
- }