android– 下拉菜单或幻灯片上的视图

概述我想知道是否有人可以指导我如何完成以下 *** 作,当用户拿着标题栏并向下拖动时,用户有一个标题栏;它向用户显示不同的视图.这是驻留在tabhost中的视图.它类似于android的默认状态栏.解决方法:您应该尝试使用带有RelativeLayout子级的ViewFlipper并在标头上附加OnTouchListeners来完

我想知道是否有人可以指导我如何完成以下 *** 作,

当用户拿着标题栏并向下拖动时,用户有一个标题栏;它向用户显示不同的视图.这是驻留在tabhost中的视图.

它类似于android的默认状态栏.

解决方法:

您应该尝试使用带有relativeLayout子级的VIEwFlipper并在标头上附加OntouchListeners来完成此 *** 作(类似AccordionVIEw的行为).它对我有用.

样品申请

main.xml //在res / layouts中

<?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="fill_parent">    <VIEwFlipper androID:ID="@+ID/flipper"         androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent">        <relativeLayout androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent">            <TextVIEw androID:ID="@+ID/txt_states" androID:text="First panel"                 androID:layout_centerHorizontal="true"                androID:textSize="18dp" androID:textStyle="bold" androID:textcolor="@androID:color/white"                androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" />            <button androID:ID="@+ID/btn_next" androID:text="@string/goto_second"                androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content"                 androID:gravity="center_horizontal" androID:layout_centerHorizontal="true" androID:layout_alignParentBottom="true"/>            <TextVIEw androID:ID="@+ID/txt_content1" androID:text="@string/loremipsum1"                  androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent"                  androID:layout_below="@ID/txt_states" androID:layout_above="@ID/btn_next"                  androID:layout_margintop="10dp" />        </relativeLayout>        <relativeLayout androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent">            <button androID:ID="@+ID/btn_prev" androID:text="@string/goto_first"                androID:layout_wIDth="fill_parent" androID:layout_height="wrap_content"                androID:gravity="center_horizontal" androID:layout_centerHorizontal="true" />            <TextVIEw androID:ID="@+ID/txt_commands" androID:text="Second panel"                 androID:layout_centerHorizontal="true"                androID:textSize="18dp" androID:textStyle="bold" androID:textcolor="@androID:color/white"                androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content"                 androID:layout_below="@ID/btn_prev" />            <TextVIEw androID:ID="@+ID/txt_content2" androID:text="@string/loremipsum2"                  androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent"                 androID:layout_below="@ID/txt_commands" androID:layout_margintop="10dp" />        </relativeLayout>    </VIEwFlipper></relativeLayout>

androIDManifest.xml //仅限活动声明

<activity androID:name=".AccordionSample" androID:label="@string/app_name">    <intent-filter>        <action androID:name="androID.intent.action.MAIN" />        <category androID:name="androID.intent.category.LAUNCHER" />    </intent-filter></activity>

AccordionSample.java //您的主要活动

import androID.app.Activity;import androID.os.Bundle;import androID.vIEw.MotionEvent;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.VIEwFlipper;public class AccordionSample extends Activity implements VIEw.OntouchListener {    private float oldtouchValue;    private VIEwFlipper flipper;    private button currentbutton;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.main);        flipper = (VIEwFlipper)findVIEwByID(R.ID.flipper);        findVIEwByID(R.ID.btn_prev).setontouchListener(this);        findVIEwByID(R.ID.btn_next).setontouchListener(this);    }    private boolean onbuttontouchEvent(MotionEvent touchevent)    {        if (currentbutton == null)            return false;        switch (touchevent.getAction())        {            case MotionEvent.ACTION_DOWN:            {                oldtouchValue = touchevent.getY();                break;            }            case MotionEvent.ACTION_UP:            {                float currentY = touchevent.getY();                final float diff = oldtouchValue - currentY;                if ((diff < -100) && (currentbutton.getID() == R.ID.btn_prev))                {                    //Up --> Bottom                    flipper.setInAnimation(AccordionAnimation.inFromtopAnimation());                    flipper.setoutAnimation(AccordionAnimation.outToBottomAnimation());                    flipper.showNext();                }                else if ((diff > 100) && (currentbutton.getID() == R.ID.btn_next))                {                    //Bottom --> Up                    flipper.setInAnimation(AccordionAnimation.inFromBottomAnimation());                    flipper.setoutAnimation(AccordionAnimation.outTotopAnimation());                    flipper.showPrevIoUs();                }                break;            }        }        currentbutton = null;        return true;    }    @OverrIDe    public boolean ontouch(VIEw v, MotionEvent event)    {        currentbutton = (button)v;        final boolean result = this.onbuttontouchEvent(event);        return result;    }}

AccordionAnimation.java //用于向上和向下滑动

import androID.vIEw.animation.AccelerateInterpolator;import androID.vIEw.animation.Animation;import androID.vIEw.animation.TranslateAnimation;public class AccordionAnimation{    public static Animation inFromBottomAnimation()    {        Animation inFromBottom =                new TranslateAnimation(Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, 0.0f,                        Animation.relative_TO_PARENT, +1.0f, Animation.relative_TO_PARENT, 0.0f);        inFromBottom.setDuration(350);        inFromBottom.setInterpolator(new AccelerateInterpolator());        return inFromBottom;    }    public static Animation outTotopAnimation()    {        Animation outtotop =                new TranslateAnimation(Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, 0.0f,                        Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, -1.0f);        outtotop.setDuration(350);        outtotop.setInterpolator(new AccelerateInterpolator());        return outtotop;    }    public static Animation inFromtopAnimation()    {        Animation inFromtop =                new TranslateAnimation(Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, 0.0f,                        Animation.relative_TO_PARENT, -1.0f, Animation.relative_TO_PARENT, 0.0f);        inFromtop.setDuration(350);        inFromtop.setInterpolator(new AccelerateInterpolator());        return inFromtop;    }    public static Animation outToBottomAnimation()    {        Animation outtoBottom =                new TranslateAnimation(Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, 0.0f,                        Animation.relative_TO_PARENT, 0.0f, Animation.relative_TO_PARENT, +1.0f);        outtoBottom.setDuration(350);        outtoBottom.setInterpolator(new AccelerateInterpolator());        return outtoBottom;    }}

strings.xml // res / values内部

<?xml version="1.0" enCoding="utf-8"?><resources>    <string name="goto_first">SlIDe down to see the first panel</string>    <string name="goto_second">SlIDe up to see the second panel</string>    <string name="loremipsum1">Lorem ipsum dolor sit amet...</string>    <string name="loremipsum2">Sed ut perspiciatis unde omnis iste...</string>    <string name="app_name">AccordionSample</string></resources>

编辑
如果您想将不同的视图拆分为不同的布局xmls,请说

> first_vIEw.xml和
>第二个vIEw.xml,

你应该修改你的onCreate方法：

flipper = (VIEwFlipper)findVIEwByID(R.ID.flipper);LayoutInflater inflater = getLayoutInflater();final VIEw firstVIEw = inflater.inflate(R.layout.first_vIEw, flipper, false);flipper.addVIEw(firstVIEw);final VIEw secondVIEw = inflater.inflate(R.layout.second_vIEw, flipper, false);flipper.addVIEw(secondVIEw);firstVIEw.findVIEwByID(R.ID.btn_next).setontouchListener(this);secondVIEw.findVIEwByID(R.ID.btn_prev).setontouchListener(this);

编辑
或者更优雅高效,只需将您为不同视图创建的布局xmls包含到main.xml中：

<?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="fill_parent">    <VIEwFlipper androID:ID="@+ID/flipper"         androID:layout_wIDth="fill_parent" androID:layout_height="fill_parent">        <include androID:ID="@+ID/flipPing_vIEw_1" layout="@layout/flipPing_vIEw_1" />        <include androID:ID="@+ID/flipPing_vIEw_2" layout="@layout/flipPing_vIEw_2" />    </VIEwFlipper></relativeLayout>

哪里

> layout / flipPing_vIEw_1.xml
包含第一个relativeLayout,
和
> layout / flipPing_vIEw_2.xml
包含第二个relativeLayout

在原始main.xml中的VIEwFlipper.

要了解有关AndroID布局的可重用性以及整体布局技术的更多信息,您应该查看Romain Guy’s great post covering layout tricks.

总结

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