单击时要更改的选项卡图标
[底部的解决方案]
我需要一个选项卡来实现以下行为,但我不确定如何实现它:
- 选项卡需要位于底部。
- 选项卡需要一个图标和文本。
- 每个图标都需要不同。
- 图标在选择时需要改变颜色,并且选项卡需要覆盖。
我问得如此模糊的原因是我尝试过实施一种方法但遇到了障碍,所以我想知道更有经验的人会如何解决它。
根据要求的一些来源: CustomTabActivity.java
private TabHost mTabHost;
private Context ctx = this;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// construct the tabhost
setContentView(R.layout.main);
setupTabHost();
mTabHost.getTabWidget().setDividerDrawable(R.drawable.tab_divider);
setupTab(new TextView(this), "t1", R.drawable.myimg1);
setupTab(new TextView(this), "t2", R.drawable.myimg2);
mTabHost.setOnTabChangedListener(new OnTabChangeListener(){
@Override
public void onTabChanged(String tabId) {
Log.e("Simon", "Current tab - " + Integer.toString(mTabHost.getCurrentTab()));
View currentView = mTabHost.getChildAt(mTabHost.getCurrentTab());
currentView.getClass();
}
});
}
private void setupTabHost() {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
}
private void setupTab(final View view, final String tag, int num) {
View tabview = createTabView(mTabHost.getContext(), tag, num);
TabSpec setContent = mTabHost.newTabSpec(tag).setIndicator(tabview).setContent(new TabContentFactory() {
public View createTabContent(String tag) {return view;}
});
mTabHost.addTab(setContent);
}
private static View createTabView(final Context context, final String text, final int num) {
View view = LayoutInflater.from(context).inflate(R.layout.tabs_bg, null);
TextView tv = (TextView) view.findViewById(R.id.tabsText);
tv.setText(text);
ImageView iv = (ImageView) view.findViewById(R.id.tabsImg);
iv.setImageResource(num);
return view;
}
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<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">
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1">
<ViewStub android:id="@+id/stub1"
android:inflatedId="@+id/subTree"
android:layout="@layout/mylayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</FrameLayout>
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent" android:background="@drawable/tabs_bg" android:layout_height="wrap_content"/>
</LinearLayout>
</TabHost>
</LinearLayout>
mylayout.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content" style="?android:attr/progressBarStyleLarge" android:id="@+id/progressBar1"></ProgressBar>
</LinearLayout>
----------------解决办法--------------
所以问题就解决了。我已将 res/drawable-[hdpi|ldpi|mdpi] 文件夹中的 R.drawable.myimg1 替换为静态图像,并将其替换为 res/drawable 中的新 xml 文件,如下所示
mydrawable1.xml
<?xml version="1.0" encoding="utf-8"?>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true"
android:drawable="@drawable/myimg1_selected"/>
<item android:drawable="@drawable/myimg1"/>
</selector>
: myimg1 和 myimg1_selected 是我想要在不同状态下显示的图像。
[Solution at the bottom]
I need a tab to have the following behaveyour but am not sure how to implement it:
- The tabs need to be at the bottom.
- The tabs need an icon & text.
- Each icon needs to be different.
- The icon needs to change colour when selected and the tab needs an overlay.
The reason I'm asking so vaguely is that I've tried implementing one way but hit a brick wall so I'm wondering how the more experienced would go about it.
Some source as requested:
CustomTabActivity.java
private TabHost mTabHost;
private Context ctx = this;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// construct the tabhost
setContentView(R.layout.main);
setupTabHost();
mTabHost.getTabWidget().setDividerDrawable(R.drawable.tab_divider);
setupTab(new TextView(this), "t1", R.drawable.myimg1);
setupTab(new TextView(this), "t2", R.drawable.myimg2);
mTabHost.setOnTabChangedListener(new OnTabChangeListener(){
@Override
public void onTabChanged(String tabId) {
Log.e("Simon", "Current tab - " + Integer.toString(mTabHost.getCurrentTab()));
View currentView = mTabHost.getChildAt(mTabHost.getCurrentTab());
currentView.getClass();
}
});
}
private void setupTabHost() {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
}
private void setupTab(final View view, final String tag, int num) {
View tabview = createTabView(mTabHost.getContext(), tag, num);
TabSpec setContent = mTabHost.newTabSpec(tag).setIndicator(tabview).setContent(new TabContentFactory() {
public View createTabContent(String tag) {return view;}
});
mTabHost.addTab(setContent);
}
private static View createTabView(final Context context, final String text, final int num) {
View view = LayoutInflater.from(context).inflate(R.layout.tabs_bg, null);
TextView tv = (TextView) view.findViewById(R.id.tabsText);
tv.setText(text);
ImageView iv = (ImageView) view.findViewById(R.id.tabsImg);
iv.setImageResource(num);
return view;
}
main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<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">
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1">
<ViewStub android:id="@+id/stub1"
android:inflatedId="@+id/subTree"
android:layout="@layout/mylayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</FrameLayout>
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent" android:background="@drawable/tabs_bg" android:layout_height="wrap_content"/>
</LinearLayout>
</TabHost>
</LinearLayout>
mylayout.xml
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:text="Button" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content" style="?android:attr/progressBarStyleLarge" android:id="@+id/progressBar1"></ProgressBar>
</LinearLayout>
--------------Solution-------------
So the issue is solved. I've replaced the R.drawable.myimg1 from being a static image in the res/drawable-[hdpi|ldpi|mdpi] folders and replaced it with a new xml file in res/drawable that looks like this:
mydrawable1.xml
<?xml version="1.0" encoding="utf-8"?>
<selector
xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true"
android:drawable="@drawable/myimg1_selected"/>
<item android:drawable="@drawable/myimg1"/>
</selector>
Where myimg1 and myimg1_selected are the images I want shown in different states.
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查看本教程。它描述了如果选择选项卡如何更改图标。
Check this tutorial. It describes how to change icon if tab is selected.