Android - 如何使用现有布局按需创建选项卡? [英] Android - How to create tabs on demand using existing layout?
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问题描述
必填背景信息:我正在开发一款平板电脑应用，供房地产经纪人在报价房屋和建筑物时使用.由于家庭或公寓可以有任意数量的房间，我认为构建一个基于选项卡的解决方案会很好，该解决方案允许逐个房间并根据需要为每个房间创建一个选项卡.
Compulsory background info: I'm building a tablet app for real estate agents to use when quoting homes and buildings. Since a home or an apartment can have any number of rooms, I thought it would be nice to build a tab-based solution that allowed for going room by room and creating one tab per room on demand.
我已经阅读了几个选项卡教程，但我发现的所有解决方案都处理预定义数量的选项卡，并使用已弃用的 TabHost.
I've been through several tab tutorials but all solutions I've found deal with a predefined number of tabs, and use the deprecated TabHost.
TabHost.TabSpec ourSpec = tabhost.newTabSpec("tag1");
ourSpec.setContent(new TabHost.TabContentFactory()
{
@Override
public View createTabContent(String tag)
{
// Put some GUI stuff here
return null;
}
});
问题:我想为新标签重用现有布局，并以某种方式计算到目前为止已创建的标签数量.
Problem: I want to reuse an existing layout for the new tab, and somehow keep count of how many tabs have been created so far.
推荐答案
经过大量研究，终于设法将一些可行的东西放在一起.
After LOTS of research, finally managed to put together something workable.
Sankar Ganesh 的 教程 非常有用.
Sankar Ganesh's tutorial was very useful.
MainActivity.java:
MainActivity.java:
package com.example.workingdynamictabexample;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TabHost;
@SuppressWarnings("deprecation")
public class MainActivity extends TabActivity
{
private TabHost tabHost;
private int z = 0;
private static final int
ADD_TAB = Menu.FIRST + 11,
DELETE_TAB = Menu.FIRST + 12;
private String Test = null;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.tabHost = getTabHost();
Intent newRoom = new Intent();
newRoom.setClass(this, RoomActivity.class);
Test = Intent.CATEGORY_LAUNCHER;
Log.d("Test", Test);
tabHost.addTab(
tabHost.newTabSpec("Main")
.setIndicator("New room")
.setContent(newRoom)
);
}
private void addTab()
{
Intent newRoom = new Intent();
newRoom.setClass(this, RoomActivity.class);
tabHost.addTab(
tabHost.newTabSpec("NewRoomTab")
.setIndicator("New room")
.setContent(newRoom)
);
Log.d("z", Integer.toString(z));
++z;
}
// "Boss, we really cannot delete one a'dem tab gubbinz, so we hides 'em."
private void deleteTab()
{
int position = tabHost.getCurrentTab();
Log.d("Position", Integer.toString(position));
Log.d("Z val in delete()", Integer.toString(z));
tabHost.getCurrentTabView().setVisibility(View.GONE);
if (position > 0)
{
tabHost.setCurrentTab(position + 1);
z -= 1;
if (z < 0)
{
z = 0;
}
}
else if (position == 0)
{
tabHost.setCurrentTab(position + 1);
z = 0;
}
else if (position == z)
{
tabHost.setCurrentTab(z - 1);
Log.d("Z value in final", "lol");
Log.d("Pos", Integer.toString(position));
Log.d("Z pos", Integer.toString(z));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
menu.add(Menu.NONE, ADD_TAB, Menu.NONE, "New room")
.setAlphabeticShortcut('a');
return (super.onCreateOptionsMenu(menu));
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case ADD_TAB:
addTab();
return (true);
case DELETE_TAB:
deleteTab();
return (true);
}
return (super.onOptionsItemSelected(item));
}
}
RoomActivity.java:
RoomActivity.java:
package com.example.workingdynamictabexample;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
public class RoomActivity extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.tabhost);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
return (super.onCreateOptionsMenu(menu));
}
}
activity_main.xml:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:tag="tabPane" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</FrameLayout>
</LinearLayout>
</TabHost>
tabhost.xml:
tabhost.xml:
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:tag="tabPane"
/>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<RelativeLayout
android:id="@+id/tab_room"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button
android:id="@+id/btnAddTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:onClick="addTab"
android:text="Add room" />
<TextView
android:id="@+id/lblType"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginTop="30dp"
android:text="Room type:" />
<Spinner
android:id="@+id/spinnerType"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/lblType"
android:layout_marginLeft="20dp"
android:layout_toRightOf="@+id/lblType" />
<TextView
android:id="@+id/lblWidthX"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/lblType"
android:layout_below="@+id/lblType"
android:layout_marginTop="30dp"
android:text="Dimension 1:" />
<TextView
android:id="@+id/lblWidthY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/lblWidthX"
android:layout_below="@+id/lblWidthX"
android:layout_marginTop="30dp"
android:text="Dimension 2:" />
<EditText
android:id="@+id/txtWidthX"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/lblWidthX"
android:layout_alignBottom="@+id/lblWidthX"
android:layout_alignLeft="@+id/txtWidthY"
android:layout_alignParentRight="true"
android:ems="10" >
<requestFocus />
</EditText>
<EditText
android:id="@+id/txtWidthY"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/lblWidthY"
android:layout_alignBottom="@+id/lblWidthY"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/lblWidthY"
android:ems="10" />
<TextView
android:id="@+id/lblFloors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/lblWidthY"
android:layout_below="@+id/txtWidthY"
android:layout_marginTop="30dp"
android:text="Floors:" />
<EditText
android:id="@+id/txtFloors"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/lblFloors"
android:layout_alignBottom="@+id/lblFloors"
android:layout_alignParentRight="true"
android:layout_toRightOf="@+id/lblFloors"
android:ems="10" />
</RelativeLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
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