如何在使用选项卡时设置新的 xml 布局

Question

我正在尝试创建一个具有多个活动的选项卡式界面。作为选项卡的一部分，我创建并设置了一个 xml tabhost 文件，如下所示：

<?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
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
            <TabWidget
                android:id="@android:id/tabs"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content" />
            <FrameLayout
                android:id="@android:id/tabcontent"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:padding="5dp" />
    </LinearLayout>
</TabHost>

这在我的 Tabs.class 文件中被调用，如下所示：

package com.system.kenetix;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TabHost;

public class Tabs extends TabActivity {
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tabs);

        Resources res = getResources(); // Resource object to get Drawables
        TabHost tabHost = getTabHost();  // The activity TabHost
        TabHost.TabSpec spec;  // Resusable TabSpec for each tab
        Intent intent;  // Reusable Intent for each tab

        // Create an Intent to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, Availability.class);
        // Initialize a TabSpec for each tab and add it to the TabHost
        spec = tabHost.newTabSpec("Availability").setIndicator("Booking",
                res.getDrawable(R.drawable.kenetix_tab_available))
            .setContent(intent);
        tabHost.addTab(spec);

        // Do the same for the other tabs
        // Create an Intent to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, RoomsAvailable.class);
        spec = tabHost.newTabSpec("Room").setIndicator("Rooms",
                          res.getDrawable(R.drawable.kinetix_tab_rooms))
                      .setContent(intent);
        tabHost.addTab(spec);

        // Do the same for the other tabs
        // Create an Intent to launch an Activity for the tab (to be reused)
        intent = new Intent().setClass(this, CustomerDetails.class);
        spec = tabHost.newTabSpec("Customer").setIndicator("Customer",
                          res.getDrawable(R.drawable.kinetix_tab_customer))
                      .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, Payment.class);
        spec = tabHost.newTabSpec("Payment").setIndicator("Payment",
                          res.getDrawable(R.drawable.kinetix_tab_payment))
                      .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, Extras.class);
        spec = tabHost.newTabSpec("Extras").setIndicator("Extras",
                          res.getDrawable(R.drawable.kinetix_tab_extras))
                      .setContent(intent);
        tabHost.addTab(spec);

        tabHost.setCurrentTab(0);
    }
}

然后，我为每个选项卡都有单独的类和一个用于设置内容的 xml 文件（按钮、微调器等）如下所示：

package com.system.kenetix;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;

public class Availability extends Activity {
    /** Called when the activity is first created. */
    Intent intent = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.availability);

    /*Nights Spinner*/

    //Create an instance of the Number of Nights spinner
    Spinner NumNightsSpinner = (Spinner) findViewById(R.id.NumAdultsSpinner);

    //Create an ArrayAdapter for the Number of Nights spinner
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.NumNights_array, android.R.layout.simple_spinner_item);

    //Set the adapter layout
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    //Apply the adapter layout to the Number of Nights spinner
    NumNightsSpinner.setAdapter(adapter);
    NumNightsSpinner.setOnItemSelectedListener(new MyOnNumNightsSelectedListener());

    /*Adults Spinner*/

    //Create an instance of the Number of Adults spinner
    Spinner NumAdultsSpinner = (Spinner) findViewById(R.id.NumAdultsSpinner);

    //Create an ArrayAdapter for the Number of adults spinner
    ArrayAdapter<CharSequence> adapter1 = ArrayAdapter.createFromResource(this, R.array.NumAdults_array, android.R.layout.simple_spinner_item);

    //Set the adapter layout
    adapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    //Apply the adapter layout to the Number of Adults spinner
    NumAdultsSpinner.setAdapter(adapter);
    NumAdultsSpinner.setOnItemSelectedListener(new MyOnNumAdultsSelectedListener());

    /*Children Spinner*/

    //Create an instance of the Number of Children spinner
    Spinner NumChildSpinner = (Spinner) findViewById(R.id.NumChildSpinner);

    //Create an ArrayAdapter for the Number of Children spinner
    ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(this, R.array.NumChild_array, android.R.layout.simple_spinner_item);

    //Set the adapter layout
    adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    //Apply the adapter layout to the Number of Children spinner
    NumChildSpinner.setAdapter(adapter);
    NumChildSpinner.setOnItemSelectedListener(new MyOnNumChildSelectedListener());

    Button CheckAvailable = (Button) findViewById(R.id.CheckAvailabilityBtn);
    CheckAvailable.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO Auto-generated method stub
            intent = new Intent(v.getContext(), RoomsAvailable.class);
            startActivity(intent);
        }
    });
}

//Listener for the selected item from the number of nights spinner
public class MyOnNumNightsSelectedListener implements OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent,View view, int pos, long id){

        //If no number of nights has been selected or onCreate occurs cancel the toast
        if (parent.getItemAtPosition(pos).toString().equals("0")){
            Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " night(s)", Toast.LENGTH_LONG).cancel();
        }

        //Else create a toast stating the number of nights selected
        else{
        Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " night(s)", Toast.LENGTH_LONG).show();
        }
    }

    public void onNothingSelected(AdapterView<?> parent) {
        // TODO Auto-generated method stub

    }

}
//Listener for the selected item from the number of adults spinner
public class MyOnNumAdultsSelectedListener implements OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent,View view, int pos, long id){

        //If no number of nights has been selected or onCreate occurs cancel the toast
        if (parent.getItemAtPosition(pos).toString().equals("0")){
            Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " adults", Toast.LENGTH_LONG).cancel();
        }

        else if (parent.getItemAtPosition(pos).toString().equals("1")){
            Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " adult", Toast.LENGTH_LONG).cancel();
        }

        //Else create a toast stating the number of nights selected
        else{
        Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " adult(s)", Toast.LENGTH_LONG).show();
        }
    }

    public void onNothingSelected(AdapterView<?> parent) {
        // TODO Auto-generated method stub
        //Do Nothing
    }
}
//Listener for the selected item from the number of adults spinner
public class MyOnNumChildSelectedListener implements OnItemSelectedListener {
    public void onItemSelected(AdapterView<?> parent,View view, int pos, long id){

        //If no number of nights has been selected or onCreate occurs cancel the toast
        if (parent.getItemAtPosition(pos).toString().equals("0")){
            Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " children", Toast.LENGTH_LONG).cancel();
        }
        else if (parent.getItemAtPosition(pos).toString().equals("1")){
            Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " child", Toast.LENGTH_LONG).show();
        }

        //Else create a toast stating the number of nights selected
        else{
        Toast.makeText(parent.getContext(), "You selected " + parent.getItemAtPosition(pos).toString() + " children", Toast.LENGTH_LONG).show();
        }
    }

    public void onNothingSelected(AdapterView<?> parent) {
        // TODO Auto-generated method stub
        //Do Nothing
    }
}

}

以及与之相关的 xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout1" android:background="@color/custom_theme_color"
    android:layout_width="match_parent" android:layout_height="wrap_content"
    android:baselineAligned="false" android:orientation="vertical">
    <TableLayout android:layout_width="wrap_content"
        android:layout_alignParentLeft="true" android:layout_height="wrap_content"
        android:id="@+id/tableLayout1" android:stretchColumns="1"
        android:layout_weight="1">

        <TableRow android:id="@+id/tableRow1" android:layout_width="wrap_content"
            android:layout_height="wrap_content">
            <ImageButton android:src="@drawable/icon"
                android:layout_height="wrap_content" android:layout_width="wrap_content"
                android:id="@+id/QuickRoomSelect" android:layout_weight="1" />
            <ImageButton android:src="@drawable/icon"
                android:layout_height="wrap_content" android:layout_width="wrap_content"
                android:id="@+id/QuickCustomerDetails" android:layout_weight="1" />
            <ImageButton android:src="@drawable/icon"
                android:layout_height="wrap_content" android:layout_width="wrap_content"
                android:id="@+id/imageButton1" android:layout_weight="1" />
        </TableRow>
    </TableLayout>

    <TextView android:layout_width="match_parent"
        android:textColor="@color/custom_theme_text_color" android:id="@+id/availabilityLbl"
        android:text="@string/AvailableLbl" android:layout_height="wrap_content"
        android:layout_weight="1" />

    <Button android:layout_height="wrap_content" android:id="@+id/DateFromBtn"
        android:layout_width="match_parent" android:text="@string/DateFromBtn"
        android:layout_weight="1" />
    <TextView android:textColor="@color/custom_theme_text_color"
        android:layout_height="wrap_content" android:id="@+id/NumNightsLdl"
        android:text="@string/NumNightsLbl" android:layout_width="wrap_content"
        android:layout_weight="1"></TextView>
    <Spinner android:layout_height="wrap_content" android:id="@+id/NumAdultsSpinner"
        android:layout_width="wrap_content" android:layout_weight="1"></Spinner>

    <TableLayout android:layout_height="wrap_content"
        android:id="@+id/tableLayout2" android:layout_width="match_parent"
        android:layout_weight="1">
        <TableRow android:id="@+id/tableRow3" android:layout_height="wrap_content"
            android:layout_width="match_parent" android:layout_weight="1">
            <TextView android:textColor="@color/custom_theme_text_color"
                android:layout_height="wrap_content" android:id="@+id/NumAdultsLbl"
                android:text="@string/NumAdultsLbl" android:layout_weight="2"></TextView>
            <TextView android:textColor="@color/custom_theme_text_color"
                android:layout_height="wrap_content" android:id="@+id/NumChildLbl"
                android:layout_weight="2" android:text="@string/NumChildLbl"></TextView>
        </TableRow>
        <TableRow android:id="@+id/tableRow2" android:layout_width="match_parent"
            android:layout_height="wrap_content" android:layout_weight="1">
            <Spinner android:layout_height="wrap_content" android:id="@+id/NumNightsSpinner"
                android:layout_width="wrap_content" android:layout_weight="1"></Spinner>
            <Spinner android:layout_height="wrap_content" android:id="@+id/NumChildSpinner"
                android:layout_width="wrap_content" android:layout_weight="1"></Spinner>
        </TableRow>
    </TableLayout>

    <Button android:layout_width="match_parent" android:id="@+id/CheckAvailabilityBtn"
        android:layout_height="wrap_content" android:text="@string/CheckAvailableBtn"
        android:layout_weight="1" />

</LinearLayout>

基本上我需要知道的是如何获取 Availability.class 文件来使用第二个 xml 文件？< /em> 我所看到的只是看起来很棒的选项卡！ 我不想在主代码中创建按钮等，因为我试图尽可能面向对象。我见过的所有示例都使用 tabs.xml 来布局活动，如果您希望每个选项卡都具有相同的信息，或者布局内容直接写入 java 类，那么这非常有用。

可以做我想做的事吗？如果是这样，有人可以建议我如何执行此操作或将我链接到某个地方吗？

Answer 1

你想要的基本上就是我的应用程序的组织方式（我正在摆弄第二个版本，它是基于视图的）。

不过，您的 Tabs XML 文件似乎存在一些问题。

1）为什么你有两次 xmlns:android 标签？ TabHost 和 LinearLayout 都有它 - 从 LinearLayout 中删除一个。

2）不确定 LinearLayout 上的 match_parent 布局参数（但这可能不是问题） - 我的第一个 TabHost （后来修改了一下）看起来像这样，这与你的非常相似（我想我们遵循相同的教程Android 文档；）），并且工作得很好：

<TabHost 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">
      <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="wrap_content"/>
      <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent"/>
   </LinearLayout>
</TabHost>

尝试修复第一件事，它应该工作得很好，我认为没有理由不应该。