PopupWindow的使用

最新推荐文章于 2021-05-27 06:32:54 发布

原创最新推荐文章于 2021-05-27 06:32:54 发布 · 280 阅读

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本文介绍了一种使用PopupWindow自定义类来美化Android应用中的弹出菜单的方法。通过创建SelectPicPopupWindow类，不仅可以定制菜单样式，还能添加动画效果，提高用户体验。

由于一个弹出菜单非常丑，我在想办法把它弄的好看点。现在找到了一个资料，用的是PopupWindow。

首先复写了PopupWindow类：

SelectPicPopupWindow.class

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);
//取消按钮
btn_cancel.setOnClickListener(new OnClickListener() {

public void onClick(View v) {
//销毁弹出框
dismiss();
}
});
//设置按钮监听
btn_pick_photo.setOnClickListener(itemsOnClick);
btn_take_photo.setOnClickListener(itemsOnClick);
//设置SelectPicPopupWindow的View
this.setContentView(mMenuView);
//设置SelectPicPopupWindow弹出窗体的宽
this.setWidth(LayoutParams.FILL_PARENT);
//设置SelectPicPopupWindow弹出窗体的高
this.setHeight(LayoutParams.WRAP_CONTENT);
//设置SelectPicPopupWindow弹出窗体可点击
this.setFocusable(true);
//设置SelectPicPopupWindow弹出窗体动画效果
this.setAnimationStyle(R.style.take_photo_anim);
//实例化一个ColorDrawable颜色为半透明
// ColorDrawable dw = new ColorDrawable(0xb0000000);
ColorDrawable dw = new ColorDrawable(0xb0000000);
//设置SelectPicPopupWindow弹出窗体的背景
this.setBackgroundDrawable(dw);
//mMenuView添加OnTouchListener监听判断获取触屏位置如果在选择框外面则销毁弹出框
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;
}
});
}

alert_dialog.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:layout_alignParentBottom="true"
android:gravity="center_horizontal"
android:orientation="vertical" >

<Button
android:id="@+id/btn_take_photo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:layout_marginTop="20dip"
android:text="拍照"
android:background="@drawable/button_savephoto_style"
android:textStyle="bold" />

<Button
android:id="@+id/btn_pick_photo"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:layout_marginTop="5dip"
android:text="从相册选择"
android:background="@drawable/button_savephoto_style"
android:textStyle="bold" />

<Button
android:id="@+id/btn_cancel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="15dip"
android:layout_marginLeft="20dip"
android:layout_marginRight="20dip"
android:layout_marginTop="15dip"
android:background="@drawable/button_savephoto_style"
android:text="取消"
android:textColor="@color/light_gray"
android:textStyle="bold" />
</LinearLayout>
</RelativeLayout>

动画效果：

在styles.xml里面添加：

然后是pop_enter_anim.xml和pop_exit_anim.xml两个文件，写的是具体的动画效果

pop_enter_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="200"
android:fromYDelta="100%p"
android:toYDelta="0" />
<alpha
android:duration="200"
android:fromAlpha="0.0"
android:toAlpha="1.0" />
</set>

pop_exit_anim.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="200"
android:fromYDelta="0"
android:toYDelta="50%p" />
<alpha
android:duration="200"
android:fromAlpha="1.0"
android:toAlpha="0.0" />
</set>

最后是弹出对话框的使用：

根据ID编写按钮对应的功能：

private void showPopupMenu(View view, final int targetID) {
menuWindow = new SelectPicPopupWindow(CarCheck.this, new OnClickListener() {
@Override
public void onClick(View v) {
menuWindow.dismiss();
switch (v.getId()) {
case R.id.btn_take_photo:
imgUri = capturePhoto.dispatchTakePictureIntent(SHOT_IMAGE, targetID);
break;
case R.id.btn_pick_photo:
capturePhoto.dispatchTakePictureIntent(PICK_IMAGE, targetID);
break;
default:
break;
}
}
});
// 显示窗口
menuWindow.showAtLocation(CarCheck.this.findViewById(R.id.image_carcheck),
Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0); // 设置layout在PopupWindow中显示的位置
}