谷歌是如何做到这一点的?在 Android 应用程序中滑动 ActionBar [英] How did Google manage to do this? Slide ActionBar in Android application
问题描述
我真的很想在我自己的应用中实现这个(侧边导航)，有谁知道谷歌是如何做到的?
I really want to implement this (the side navigation) in an app of my own, does anyone know how Google managed to do this?
他们似乎将当前窗口拉到一边，并放入了自己的飞入式导航.
They seem to have pulled the current window aside and put in a fly-in navigation of their own.
推荐答案
事实上，有一种方法可以做到这一点.即使没有实现自己的 ActionBar.
In fact, there's a way to do this. Even without implementing your own ActionBar.
看看hierachyviewer！(位于tools目录下)
Just have a look at the hierachyviewer! (Located in the tools directory)
有 DecorView 和 LinearLayout 作为子元素.这个 LinearLayout 包含 ActionBar 和其他内容.所以，你可以简单地将一些 FrameLayout.LayoutParams 应用到这个 LinearLayout 并通过这种方式在左侧获得一些空间.然后，您可以使用菜单 ListView 填充此空间，并使用 FrameLayout 覆盖其他内容，即在单击时折叠菜单.所以，这里有一些代码:
There's the DecorView, and a LinearLayout as a child. This LinearLayout contains both the ActionBar and the other content. So, you can simply apply some FrameLayout.LayoutParams to this LinearLayout and get some space on the left side this way. Then, you can fill this space with your menu-ListView and overlay the other content with a FrameLayout, that, when it's clicked, collapses the menu. So, here's some code:
首先，用于折叠/展开的类(SlideMenu.java):
First, the class for collapsing / expanding (SlideMenu.java):
package your.cool.app;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Rect;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.Window;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
public class SlideMenu {
//just a simple adapter
public static class SlideMenuAdapter extends ArrayAdapter<SlideMenu.SlideMenuAdapter.MenuDesc> {
Activity act;
SlideMenu.SlideMenuAdapter.MenuDesc[] items;
class MenuItem {
public TextView label;
public ImageView icon;
}
static class MenuDesc {
public int icon;
public String label;
}
public SlideMenuAdapter(Activity act, SlideMenu.SlideMenuAdapter.MenuDesc[] items) {
super(act, R.id.menu_label, items);
this.act = act;
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = act.getLayoutInflater();
rowView = inflater.inflate(R.layout.menu_listitem, null);
MenuItem viewHolder = new MenuItem();
viewHolder.label = (TextView) rowView.findViewById(R.id.menu_label);
viewHolder.icon = (ImageView) rowView.findViewById(R.id.menu_icon);
rowView.setTag(viewHolder);
}
MenuItem holder = (MenuItem) rowView.getTag();
String s = items[position].label;
holder.label.setText(s);
holder.icon.setImageResource(items[position].icon);
return rowView;
}
}
private static boolean menuShown = false;
private static View menu;
private static LinearLayout content;
private static FrameLayout parent;
private static int menuSize;
private static int statusHeight = 0;
private Activity act;
SlideMenu(Activity act) {
this.act = act;
}
//call this in your onCreate() for screen rotation
public void checkEnabled() {
if(menuShown)
this.show(false);
}
public void show() {
//get the height of the status bar
if(statusHeight == 0) {
Rect rectgle = new Rect();
Window window = act.getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectgle);
statusHeight = rectgle.top;
}
this.show(true);
}
public void show(boolean animate) {
menuSize = Functions.dpToPx(250, act);
content = ((LinearLayout) act.findViewById(android.R.id.content).getParent());
FrameLayout.LayoutParams parm = (FrameLayout.LayoutParams) content.getLayoutParams();
parm.setMargins(menuSize, 0, -menuSize, 0);
content.setLayoutParams(parm);
//animation for smooth slide-out
TranslateAnimation ta = new TranslateAnimation(-menuSize, 0, 0, 0);
ta.setDuration(500);
if(animate)
content.startAnimation(ta);
parent = (FrameLayout) content.getParent();
LayoutInflater inflater = (LayoutInflater) act.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
menu = inflater.inflate(R.layout.menu, null);
FrameLayout.LayoutParams lays = new FrameLayout.LayoutParams(-1, -1, 3);
lays.setMargins(0,statusHeight, 0, 0);
menu.setLayoutParams(lays);
parent.addView(menu);
ListView list = (ListView) act.findViewById(R.id.menu_listview);
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
//handle your menu-click
}
});
if(animate)
menu.startAnimation(ta);
menu.findViewById(R.id.overlay).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
SlideMenu.this.hide();
}
});
Functions.enableDisableViewGroup((LinearLayout) parent.findViewById(android.R.id.content).getParent(), false);
((ExtendedViewPager) act.findViewById(R.id.viewpager)).setPagingEnabled(false);
((ExtendedPagerTabStrip) act.findViewById(R.id.viewpager_tabs)).setNavEnabled(false);
menuShown = true;
this.fill();
}
public void fill() {
ListView list = (ListView) act.findViewById(R.id.menu_listview);
SlideMenuAdapter.MenuDesc[] items = new SlideMenuAdapter.MenuDesc[5];
//fill the menu-items here
SlideMenuAdapter adap = new SlideMenuAdapter(act, items);
list.setAdapter(adap);
}
public void hide() {
TranslateAnimation ta = new TranslateAnimation(0, -menuSize, 0, 0);
ta.setDuration(500);
menu.startAnimation(ta);
parent.removeView(menu);
TranslateAnimation tra = new TranslateAnimation(menuSize, 0, 0, 0);
tra.setDuration(500);
content.startAnimation(tra);
FrameLayout.LayoutParams parm = (FrameLayout.LayoutParams) content.getLayoutParams();
parm.setMargins(0, 0, 0, 0);
content.setLayoutParams(parm);
Functions.enableDisableViewGroup((LinearLayout) parent.findViewById(android.R.id.content).getParent(), true);
((ExtendedViewPager) act.findViewById(R.id.viewpager)).setPagingEnabled(true);
((ExtendedPagerTabStrip) act.findViewById(R.id.viewpager_tabs)).setNavEnabled(true);
menuShown = false;
}
}
一些帮助方法(对我来说，在静态 Functions.java 中):
Some helping methods (for me, in static Functions.java):
public static int dpToPx(int dp, Context ctx) {
Resources r = ctx.getResources();
return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, r.getDisplayMetrics());
}
//originally: http://stackoverflow.com/questions/5418510/disable-the-touch-events-for-all-the-views
//modified for the needs here
public static void enableDisableViewGroup(ViewGroup viewGroup, boolean enabled) {
int childCount = viewGroup.getChildCount();
for (int i = 0; i < childCount; i++) {
View view = viewGroup.getChildAt(i);
if(view.isFocusable())
view.setEnabled(enabled);
if (view instanceof ViewGroup) {
enableDisableViewGroup((ViewGroup) view, enabled);
} else if (view instanceof ListView) {
if(view.isFocusable())
view.setEnabled(enabled);
ListView listView = (ListView) view;
int listChildCount = listView.getChildCount();
for (int j = 0; j < listChildCount; j++) {
if(view.isFocusable())
listView.getChildAt(j).setEnabled(false);
}
}
}
}
然后，布局:
菜单的布局(res/layout/menu.xml)
Layout of the menu (res/layout/menu.xml)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<LinearLayout
android:orientation="vertical"
android:layout_height="fill_parent"
android:layout_width="250dip"
android:background="@color/darkblack">
<ListView
android:id="@+id/menu_listview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:divider="@color/dividerblack"
android:dividerHeight="2dip" />
</LinearLayout>
<FrameLayout
android:id="@+id/overlay"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>
</LinearLayout>
列表项的布局(res/layout/menu_listitem.xml):
Layout of the listitems (res/layout/menu_listitem.xml):
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="fill_parent" >
<ImageView
android:id="@+id/menu_icon"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginRight="5dip"
android:layout_marginLeft="10dip"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip" />
<TextView
android:id="@+id/menu_label"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textSize="24dp"
android:layout_marginTop="10dip"
android:layout_marginBottom="10dip" />
</LinearLayout>
使用方法:
在你的 onCreate() 中:
private SlideMenu slidemenu;
@Override
public void onCreate(Bundle savedInstanceState) {
//your onCreate code
slidemenu = new SlideMenu(this);
slidemenu.checkEnabled();
}
在 ActionBar 主页按钮的处理程序中:
In the handler for your ActionBar homebutton:
slidemenu.show();
就是这样！
现在，它的一个小截图:
And now, a little screenshot of it in action:
据我所知，它正在工作.如果您遇到任何问题或我的解释不清楚，请与我联系！
As far as I know, it is working. If you experience any problems or my explanations are not clear, please contact me!
ExtendedViewPager &ExtendedPagerStrip:
ExtendedViewPager:
ExtendedViewPager:
package your.cool.app;
//source: http://blog.svpino.com/2011/08/disabling-pagingswiping-on-android.html
import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
public class ExtendedViewPager extends ViewPager {
private boolean enabled;
public ExtendedViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
this.enabled = true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (this.enabled) {
return super.onTouchEvent(event);
}
return false;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
if (this.enabled) {
return super.onInterceptTouchEvent(event);
}
return false;
}
public void setPagingEnabled(boolean enabled) {
this.enabled = enabled;
}
}
ExtendedPagerTabStrip:
ExtendedPagerTabStrip:
package your.cool.app;
//source: http://blog.svpino.com/2011/08/disabling-pagingswiping-on-android.html
import android.content.Context;
import android.support.v4.view.PagerTabStrip;
import android.util.AttributeSet;
import android.view.MotionEvent;
public class ExtendedPagerTabStrip extends PagerTabStrip {
private boolean enabled;
public ExtendedPagerTabStrip(Context context, AttributeSet attrs) {
super(context, attrs);
this.enabled = true;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (this.enabled) {
return super.onTouchEvent(event);
}
return false;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
if (this.enabled) {
return super.onInterceptTouchEvent(event);
}
return false;
}
public void setNavEnabled(boolean enabled) {
this.enabled = enabled;
}
}
我将此 SlideMenu 用于带有 ViewPager 和 PagerTabStrip 的活动，用于 Talk、Market 等选项卡.您不能禁用这些以一种简单的方式查看，因此上面的两个类只是扩展它们以在禁用时停止 onTouch 事件.
I use this SlideMenu for an Activity with a ViewPager with PagerTabStrip for tabs like Talk, Market etc. You can't disable these Views in an easy way, so the two classes above just extend them to stop the onTouch event when disabled.
这篇关于谷歌是如何做到这一点的?在 Android 应用程序中滑动 ActionBar的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
