1

当我将它添加到我的 xml 时，我正在尝试使用 tabhost，它看起来不正确，并且我相信需要在 java 中完成一些事情，我正在尝试使用三个不同的类设置三个选项卡这可能吗?

这是我的xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <TabHost
            android:id="@android:id/tabhost"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1" >

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical" >

                <TabWidget
                    android:id="@android:id/tabs"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content" >
                </TabWidget>

                <FrameLayout
                    android:id="@android:id/tabcontent"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent" >

                    <LinearLayout
                        android:id="@+id/tab1"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent" >

                        <TextView
                            android:id="@+id/textView1"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="Browser History:"
                            android:textAppearance="?android:attr/textAppearanceLarge" />

                        <TextView
                            android:id="@+id/hello"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content" />
                    </LinearLayout>

                    <LinearLayout
                        android:id="@+id/tab2"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent" >

                        <TextView
                            android:id="@+id/textView2"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="Call Log"
                            android:textAppearance="?android:attr/textAppearanceLarge" />

                        <TextView
                            android:id="@+id/call"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content" />
                    </LinearLayout>

                    <LinearLayout
                        android:id="@+id/tab3"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent" >

                        <TextView
                            android:id="@+id/textView3"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:text="Text Messages"
                            android:textAppearance="?android:attr/textAppearanceLarge" />

                        <TextView
                            android:id="@+id/tvSms"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content" />
                    </LinearLayout>
                </FrameLayout>
            </LinearLayout>
        </TabHost>
    </LinearLayout>

</LinearLayout>

我有三个不同的类，因为我试图使用每个选项卡来打开每个活动。

这是课程

  package com.johnnydicamillo.spybeta;

import android.app.Activity;
import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Browser;
import android.widget.TabHost;
import android.widget.TextView;

public class AndroidSpybetaActivity extends TabActivity {
    /** Called when the activity is first created. */
    Resources res;
    TabHost tabHost;
    Intent intent;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        res = getResources();
        tabHost = getTabHost();
        TabHost.TabSpec spec;

        intent = new Intent().setClass(this, Messaging.class);
        spec = tabHost.newTabSpec("messaging").setIndicator("Messaging")
                .setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, TestingData.class);
        spec = tabHost.newTabSpec("Calls").setIndicator("Calls")
                .setContent(intent);
        tabHost.addTab(spec);
        tabHost.setCurrentTab(0);

        TextView view = (TextView) findViewById(R.id.hello);
        Cursor mCur = managedQuery(android.provider.Browser.BOOKMARKS_URI,
                null, null, null, null);
        mCur.moveToFirst();
        int index = mCur.getColumnIndex(Browser.BookmarkColumns.TITLE);
        while (mCur.isAfterLast() == false) {
            view.append(" WebSite " + mCur.getString(index));
            mCur.moveToNext();
        }
    }
}

第二

package com.johnnydicamillo.spybeta;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Messaging extends TabActivity{
    static TextView messageBox;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        messageBox = (TextView) findViewById(R.id.tvSms);

    }
    public static void updateMessageBox(String msg) {
        messageBox.append(msg);
    }

}

第三个

package com.johnnydicamillo.spybeta;

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.CallLog;
import android.provider.CallLog.Calls;
import android.widget.TextView;

public class TestingData extends TabActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        TextView view = (TextView) findViewById(R.id.call);
        String[] projection = new String[] {

        Calls.NUMBER

        };
        Cursor mCur = managedQuery(CallLog.Calls.CONTENT_URI, projection,
                Calls.DURATION + "<?", new String[] { "60" }, Calls.DURATION
                        + " ASC");
        mCur.moveToFirst();

        while (mCur.isAfterLast() == false) {
            for (int i = 0; i < mCur.getColumnCount(); i++) {
                view.append(" Number " + mCur.getString(i));
            }
            mCur.moveToNext();
        }
    }
}

这是我的日志：

08-12 15:19:16.368: D/AndroidRuntime(280): Shutting down VM
08-12 15:19:16.368: W/dalvikvm(280): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
08-12 15:19:16.628: E/AndroidRuntime(280): FATAL EXCEPTION: main
08-12 15:19:16.628: E/AndroidRuntime(280): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.johnnydicamillo.spybeta/com.johnnydicamillo.spybeta.AndroidSpybetaActivity}: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.johnnydicamillo.spybeta/com.johnnydicamillo.spybeta.Messaging}; have you declared this activity in your AndroidManifest.xml?
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.os.Handler.dispatchMessage(Handler.java:99)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.os.Looper.loop(Looper.java:123)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.main(ActivityThread.java:4627)
08-12 15:19:16.628: E/AndroidRuntime(280):  at java.lang.reflect.Method.invokeNative(Native Method)
08-12 15:19:16.628: E/AndroidRuntime(280):  at java.lang.reflect.Method.invoke(Method.java:521)
08-12 15:19:16.628: E/AndroidRuntime(280):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-12 15:19:16.628: E/AndroidRuntime(280):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-12 15:19:16.628: E/AndroidRuntime(280):  at dalvik.system.NativeStart.main(Native Method)
08-12 15:19:16.628: E/AndroidRuntime(280): Caused by: android.content.ActivityNotFoundException: Unable to find explicit activity class {com.johnnydicamillo.spybeta/com.johnnydicamillo.spybeta.Messaging}; have you declared this activity in your AndroidManifest.xml?
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.resolveActivityInfo(ActivityThread.java:2473)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:277)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.widget.TabHost.setCurrentTab(TabHost.java:323)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.widget.TabHost.addTab(TabHost.java:213)
08-12 15:19:16.628: E/AndroidRuntime(280):  at com.johnnydicamillo.spybeta.AndroidSpybetaActivity.onCreate(AndroidSpybetaActivity.java:31)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-12 15:19:16.628: E/AndroidRuntime(280):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-12 15:19:16.628: E/AndroidRuntime(280):  ... 11 more
08-12 15:19:21.929: I/Process(280): Sending signal. PID: 280 SIG: 9
4

2 回答 2

1

对的，这是可能的。

您可以通过以下方式为每个选项卡指定每个活动（启动意图）

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        res = getResources();
        tabHost = getTabHost();
        TabHost.TabSpec spec;


        intent = new Intent().setClass(this, CalendarActivity.class);
        spec = tabHost.newTabSpec("calendar").setIndicator("Calendar", res.getDrawable(R.drawable.ic_tab_calendar)).setContent(intent);
        tabHost.addTab(spec);

        intent = new Intent().setClass(this, ProfileActivity.class);
        spec = tabHost.newTabSpec("profile").setIndicator("Profile", res.getDrawable(R.drawable.ic_tab_profile)).setContent(intent);
        tabHost.addTab(spec);

        tabHost.setCurrentTab(0);
}

每个活动都有自己的内容布局视图，因此在主布局中无需担心。

您的主要 XML 布局将小而简单，如

<?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="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="5dp" >

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="wrap_content"
            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>

我想这就是你想要的。

于 2012-08-12T03:13:26.010 回答
0

不可能有一个选项卡对应于一个活动。选项卡的目的是在一个视图中显示太多信息时将一个活动分解为多少个视图（不要与活动混淆）。然而，这里是您设置 TabHost 的方式： 首先从 xml 开始：

<?xml version="1.0" encoding="UTF-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
 -

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >

        <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" >

            <AnalogClock
                android:id="@+id/tab1"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent" />

            <Button
                android:id="@+id/tab2"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:text="A semi-random button" />
        </FrameLayout>
    </LinearLayout>
</TabHost>

抱歉，这很难阅读，但如果你将它复制到 eclipse 中，你应该没问题。然后是Java：

    import android.app.Activity;
import android.os.Bundle;
import android.widget.TabHost;

public class TabDemo extends Activity {
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.main);

        TabHost tabs=(TabHost)findViewById(R.id.tabhost); //Id of tab host

        tabs.setup();

        TabHost.TabSpec spec=tabs.newTabSpec("tag1");//make a new tab

        spec.setContent(R.id.tab1);  //What is in the tab (not an activity but rather a view)
        spec.setIndicator("Clock"); //Name of tab
        tabs.addTab(spec); //Add it 

        spec=tabs.newTabSpec("tag2"); //Same thing here
        spec.setContent(R.id.tab2);
        spec.setIndicator("Button");
        tabs.addTab(spec);
    }
}

这相对简单，我相信android开发网站有支持，当然只是在谷歌上搜索。这段代码是由 Grant Allen 从《Beginning Android 4》中复制而来的，这本书更详细地解释了这个主题。祝你好运！

于 2012-08-12T01:18:07.707 回答