android - 适用于 Android 的自定义 Tabwiget

Question

我设计了一个用于选项卡（自定义全局活动）的活动，此活动有不同的按钮，如选项卡和单击按钮调用相应的活动，所以如果我调用 A（假设）活动，然后调用 B（假设）活动并返回 A，在这种情况下，再次创建活动。我希望此活动的行为应该像tabwidget并从开始onResume()。这是否可能，如果是，那么请如何建议我。Thanks

全局选项卡布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#1a1a1a"
    android:gravity="center_vertical"
    android:orientation="horizontal"
    android:weightSum="100" >

    <ImageView
        android:id="@+id/liveTV"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:padding="5dp"
        android:src="@drawable/tab_livetv_selector" />

    <ImageView
        android:id="@+id/movies"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:padding="5dp"
        android:src="@drawable/tab_movie_selector" />

    <ImageView
        android:id="@+id/vod"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:padding="5dp"
        android:src="@drawable/tab_vod_selector" />

    <ImageView
        android:id="@+id/events"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:padding="5dp"
        android:src="@drawable/tab_event_selector" />

    <ImageView
        android:id="@+id/playlist"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="20"
        android:padding="5dp"
        android:src="@drawable/tab_playlist_selector" />

</LinearLayout>

全局选项卡的 Java 代码

public class Header extends LinearLayout implements OnClickListener {
    private Context mContext;
    private ImageView liveTV;
    private ImageView movies;
    private ImageView vod;
    private ImageView events;
    private ImageView playlist;
    public static String tab = null;
    public static boolean destroy = false;

    public Header(Context context, AttributeSet attrs) {
        super(context, attrs);

        mContext = context;

        String infService = Context.LAYOUT_INFLATER_SERVICE;
        LayoutInflater li;

        li = (LayoutInflater) getContext().getSystemService(infService);
        li.inflate(R.layout.header, this, true);
        liveTV = (ImageView) findViewById(R.id.liveTV);
        movies = (ImageView) findViewById(R.id.movies);
        vod = (ImageView) findViewById(R.id.vod);
        events = (ImageView) findViewById(R.id.events);
        playlist = (ImageView) findViewById(R.id.playlist);
        liveTV.setOnClickListener(this);
        movies.setOnClickListener(this);
        vod.setOnClickListener(this);
        events.setOnClickListener(this);
        playlist.setOnClickListener(this);
    }

    public void init() {
        // setting selector for selected tab
        if (tab.equals("movies")) {
            destroy = true;
            movies.setSelected(true);
            liveTV.setSelected(false);
            vod.setSelected(false);
            events.setSelected(false);
            playlist.setSelected(false);
        } else if (tab.equals("vod")) {
            destroy = true;
            vod.setSelected(true);
            liveTV.setSelected(false);
            movies.setSelected(false);
            events.setSelected(false);
            playlist.setSelected(false);
        } else if (tab.equals("events")) {
            destroy = true;
            events.setSelected(true);
            liveTV.setSelected(false);
            movies.setSelected(false);
            vod.setSelected(false);
            playlist.setSelected(false);
        } else if (tab.equals("playlist")) {
            destroy = true;
            playlist.setSelected(true);
            liveTV.setSelected(false);
            movies.setSelected(false);
            vod.setSelected(false);
            events.setSelected(false);
        } else {
            destroy = true;
            liveTV.setSelected(true);
            movies.setSelected(false);
            vod.setSelected(false);
            events.setSelected(false);
            playlist.setSelected(false);
        }
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        //have to put here code for click
        }
    }

}

然后只需要像另一个视图一样将以下代码放在 xml 中

<com.media.ui.Header
            android:id="@+id/layoutHeader"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:gravity="bottom" />

score 0 · Accepted Answer

如果你想在你的应用程序中引入标签的使用，那么最好的方法，IMO，是FragmentTabHost从支持库中使用，因为该标准TabActivity已被弃用。

还有一个例子展示了如何使用这个组件，它位于里面<your_sdk_folder_location>/extras/android/support/samples/Support4Demos。

这个标准组件允许您根据需要自定义标签，而不是发明自行车。

score 0 · Accepted Answer

请编写以下代码而不是您的代码以在一个 TabActivity 中添加多个活动，它将解决您的问题。

ActivityStack.java

private Stack<String> stack;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    if (stack == null)
        stack = new Stack<String>();
    // start default activity
    push("FirstStackActivity", new Intent(this, Tab_SampleActivity.class));
}

@Override
public void finishFromChild(Activity child) {
    pop();
}

@Override
public void onBackPressed() {
    pop();
}

public void push(String id, Intent intent) {
    Window window = getLocalActivityManager().startActivity(id, intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
    if (window != null) {
        stack.push(id);
        setContentView(window.getDecorView());
    }
}

public void pop() {
    if (stack.size() == 1)
        finish();
    LocalActivityManager manager = getLocalActivityManager();
    manager.destroyActivity(stack.pop(), true);
    if (stack.size() > 0) {
        Intent lastIntent = manager.getActivity(stack.peek()).getIntent();
        Window newWindow = manager.startActivity(stack.peek(), lastIntent);
        setContentView(newWindow.getDecorView());
    }
}

TabActivity.java

public class TabActivity extends TabActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tab_screen);
        TabHost tabHost = getTabHost();
        Intent intent = new Intent().setClass(this, ActivityStack.class);
        TabHost.TabSpec spec = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.home));
        spec.setContent(intent);

        tabHost.addTab(spec);

        Intent intent1 = new Intent().setClass(this, ActivityStack.class);
        TabHost.TabSpec spec1 = tabHost.newTabSpec("tabId").setIndicator("Temp", getResources().getDrawable(R.drawable.invoice));
        spec1.setContent(intent1);
        tabHost.addTab(spec1);

        tabHost.setCurrentTab(0);
    }
}

第一活动.java

public class FirstActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView textView = new TextView(this);
        textView.setText("Tab Sample Activity ");
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setClass(getParent(), SecondActivity.class);
                ActivityStack activityStack = (ActivityStack) getParent();
                activityStack.push("SecondActivity", intent);
            }
        });
        setContentView(textView);
    }
}

SecondActivity.java

public class SecondActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView textView = new TextView(this);
        textView.setText("First Stack Activity ");
        textView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setClass(getParent(), ThirdActivity.class);
                ActivityStack activityStack = (ActivityStack) getParent();
                activityStack.push("ThirdActivity", intent);
            }
        });
        setContentView(textView);
    }
}

第三活动.java

public class ThirdActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

将以下 XML 文件添加到您的 res/layout 文件夹中。

1) tab_screen.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" >

    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical"
        android:padding="3dp" >

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_above="@android:id/tabs"
            android:layout_weight="1" />

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true" />
    </RelativeLayout>

</TabHost>

2) main.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" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello" />

</LinearLayout>

AndroidManifest.xml:-

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.android.tabsample"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".FirstActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".TabActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SecondActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
        <activity
            android:name=".ThirdActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>

</manifest>

有关在一个 TabActivity 下添加多个活动的更多信息，请参阅下面的链接，并附上完整的示例。

Android - 一个 TabActivity 下的多个 Android 活动

android - 适用于 Android 的自定义 Tabwiget

2 回答 2

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