Android疑难杂症-7.0系统PopupWindow#showAsDropDown()显示异常

Android疑难杂症

问题描述

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final PopupWindow popupWindow = new PopupWindow(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
//... ...
popupWindow.showAsDropDown(anchor);

上述代码在7.0手机上不会在anchor下方弹出，而是在屏幕最上方弹出，7.0以下手机则没问题；
高度MATCH_PARENT时才会这样，WRAP_CONTENT时不会。

原因

  • 7.0系统的一个bug；
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Android

Android常用代码-EditText各种样式背景

Android常用代码

底部变色直线

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<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:bottom="1px" android:state_focused="true">
        <layer-list>
            <item>
                <shape>
                    <solid android:color="@color/colorPrimary" />
                </shape>
            </item>
            <item android:bottom="1px">
                <shape>
                    <solid android:color="@android:color/white" />
                </shape>
            </item>
        </layer-list>
    </item>
    <item android:bottom="1px" android:state_pressed="false">
        <layer-list>
            <item>
                <shape>
                    <solid android:color="#ddd" />
                </shape>
            </item>
            <item android:bottom="1px">
                <shape>
                    <solid android:color="@android:color/white" />
                </shape>
            </item>
        </layer-list>
    </item>
</selector>
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Android

Android常用代码-发送验证码倒计时

Android常用代码

使用RxJava优雅的实现

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btnVerifyCode.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        btnVerifyCode.setEnabled(false);
        Observable.interval(0, 1, TimeUnit.SECONDS)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribeOn(AndroidSchedulers.mainThread())
                .limit(31)
                .map(new Func1<Long, Long>() {
                    @Override
                    public Long call(Long aLong) {
                        return 30 - aLong;
                    }
                })
                .doOnSubscribe(new Action0() {
                    @Override
                    public void call() {
                        btnVerifyCode.setEnabled(false);
                    }
                })
                .doOnCompleted(new Action0() {
                    @Override
                    public void call() {
                        btnVerifyCode.setEnabled(true);
                        btnVerifyCode.setText("重新发送");
                    }
                })
                .subscribe(new Action1<Long>() {
                    @Override
                    public void call(Long aLong) {
                        btnVerifyCode.setText("重新发送（"+aLong + " s ）");
                    }
                }, new Action1<Throwable>() {
                    @Override
                    public void call(Throwable throwable) {
                        ToastUtils.showCustomBgToast("获取失败，错误信息：" + throwable.getMessage() + "");
                    }
                });
    }
});
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Android

Android常用代码-底部弹出PopupWindow

Android常用代码

关键代码

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/**
 * 显示自定义底部弹出PopupWindow
 *
 * @param parent            传根布局就好了
 * @param contentView       PopupWindow内容
 * @param bgColor           背景颜色(窗体变暗效果)
 * @param focusable         是否点击空白区域取消(非全屏时可以)和返回键关闭
 * @param fullScreen        是否全屏
 * @param onDismissListener 取消监听
 */
public void showBottomPopupWindow(View parent, View contentView, int bgColor, boolean focusable, boolean fullScreen, PopupWindow.OnDismissListener onDismissListener) {
    hideBottomDialog();
    AutoUtils.auto(contentView);
    popupWindow = new PopupWindow(ViewGroup.LayoutParams.MATCH_PARENT, fullScreen ? ViewGroup.LayoutParams.MATCH_PARENT : ViewGroup.LayoutParams.WRAP_CONTENT);
    popupWindow.setContentView(contentView);
    // 设置弹出窗体可点击
    popupWindow.setFocusable(focusable);
    // 设置弹出窗体的背景
    popupWindow.setBackgroundDrawable(new ColorDrawable(bgColor));
    if (onDismissListener != null) {
        popupWindow.setOnDismissListener(onDismissListener);
    }
    //设置弹出窗体显示时的动画，从底部向上弹出
    popupWindow.setAnimationStyle(R.style.ZzAnimationDialog);
    popupWindow.showAtLocation(parent, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
}
/**
 * 隐藏自定义底部弹出PopupWindow
 */
public void hideBottomDialog() {
    if (popupWindow != null) {
        popupWindow.dismiss();
        popupWindow = null;
    }
}
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Android

Android自定义控件-SlidingValidationView

Android自定义控件

效果图

图2

代码

属性

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<declare-styleable name="SlidingValidationView">
    <attr name="sv_drag_view_color" format="color|reference" />
    <attr name="sv_line_color" format="color|reference" />
    <attr name="sv_final_point_color" format="color|reference" />
    <attr name="sv_sliding_progress" format="integer" />
    <attr name="sv_draw_radius" format="dimension|reference" />
    <attr name="sv_final_point_radius" format="dimension|reference" />
    <attr name="sv_line_point_radius" format="dimension|reference" />
</declare-styleable>
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Android

Android自定义控件-RatioColorBar

Android自定义控件

效果图

图2

代码

属性

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<declare-styleable name="RatioColorBar">
    <attr name="rcb_show_border" format="boolean" />
    <attr name="rcb_show_padding" format="boolean" />
    <attr name="rcb_border_width" format="dimension|reference" />
    <attr name="rcb_border_padding" format="dimension|reference" />
    <attr name="rcb_border_color" format="color|reference" />
</declare-styleable>
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Android