自定义TabHost
自定义TabHost的实现：
public class MyTabHost {
int selectColor = Color.parseColor("#029FFF");
int unselectColor = Color.parseColor("#029FCC");
LinearLayout tabLayout;
FrameLayout contentLayout;
Context context;
private List<MyTab> tabs = new LinkedList<MyTab>();
public MyTabHost(Context context) {
this.context = context;
}
public void setTabColor(int selectColor, int unselectColor) {
this.selectColor = selectColor;
this.unselectColor = unselectColor;
}
public LinearLayout getTabLayout() {
return tabLayout;
}
public void setTabLayout(LinearLayout tabLayout) {
this.tabLayout = tabLayout;
}
public void setContentLayout(FrameLayout contentLayout) {
this.contentLayout = contentLayout;
}
public FrameLayout getContentLayout() {
return contentLayout;
}
private Button newButton(String text) {
Button button = new Button(context);
button.setTextColor(Color.BLACK);
button.setTextSize(20);
button.setPadding(10, 5, 10, 5);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT);
params.setMarginEnd(1);
button.setLayoutParams(params);
button.setGravity(Gravity.CENTER_VERTICAL);
button.setBackground(null);
button.setBackgroundColor(unselectColor);
button.setText(text);
return button;
}
/**
* 获得tab数量
* @return
*/
public int getTabCount() {
return tabs.size();
}
/**
* 删除一个Tab
*
* @param tab
*/
public void removeTab(MyTab tab) {
tabs.remove(tab);
}
/**
* 添加一个Tab
* @param title
* @return
*/
public MyTab addTab(String title) {
final Button button = newButton(title);
if(tabLayout != null)
tabLayout.addView(button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int index = getIndexByButton(button);
setCurrentTab(index);
}
});
button.setBackgroundColor(unselectColor);
MyTab tab = new MyTab(button, false, null);
tabs.add(tab);
return tab;
}
/**
* 添加一个Tab
*
* @param button
* @param select
* @param content
* @return
*/
public MyTab addTab(final Button button, boolean select, Object content) {
MyTab tab = new MyTab(button, select, content);
tabs.add(tab);
return tab;
}
/**
* 获取当前选中的Tab
*
* @return
*/
public MyTab getCurrentTab() {
for (MyTab tab : tabs) {
if (tab != null && tab.isSelect())
return tab;
}
return null;
}
/**
* 获取当前选中的Tab
*
* @return
*/
public MyTab getTabByButton(Button button) {
if (button == null)
return null;
for (MyTab tab : tabs) {
if (tab != null && tab.getButton() == button)
return tab;
}
return null;
}
/**
* 设置当前选中哪个Tab
*
* @param index
*/
public void setCurrentTab(int index) {
if (index < 0 || index >= tabs.size())
return;
for (int i = 0; i < tabs.size(); i++) {
MyTab tab = tabs.get(i);
if (i == index) {
tab.setSelect(true);
tab.getButton().setBackgroundColor(selectColor);
contentLayout.getChildAt(index).setVisibility(View.VISIBLE);
} else {
tab.setSelect(false);
tab.getButton().setBackgroundColor(unselectColor);
contentLayout.getChildAt(i).setVisibility(View.INVISIBLE);
}
}
}
/**
* 获取button对于的索引
* @param button
* @return
*/
public int getIndexByButton(Button button) {
if (button == null)
return -1;
for (int i = 0; i < tabs.size(); i++) {
MyTab tab = tabs.get(i);
if (tab != null && tab.getButton() == button)
return i;
}
return -1;
}
/**
* 设置当前选中哪个Tab
*
* @param index
*/
public void setCurrentTab(Button button) {
if (button == null)
return;
for (MyTab tab : tabs) {
if (tab != null && tab.getButton() == button) {
tab.setSelect(true);
tab.getButton().setBackgroundColor(selectColor);
} else {
tab.setSelect(false);
tab.getButton().setBackgroundColor(unselectColor);
}
}
}
public static class MyTab {
private Button button;
private boolean select;
private Object content;
private View contentView;
private MyTab(Button button, boolean select, Object content) {
this.button = button;
this.select = select;
this.content = content;
}
public void setContentView(View contentView) {
this.contentView = contentView;
}
public View getContentView() {
return contentView;
}
public Button getButton() {
return button;
}
public void setButton(Button button) {
this.button = button;
}
public boolean isSelect() {
return select;
}
public void setSelect(boolean select) {
this.select = select;
}
public Object getContent() {
return content;
}
public void setContent(Object content) {
this.content = content;
}
}
}
自定义TabHost的应用：
public class RecommandFragment extends Fragment {
String TAG = "RecommandFragment";
LinearLayout tabLayout;
FrameLayout contentLayout;
Context context;
int unselectColor;
int selectColor;
MyTabHost tabHost;
int COLUMN_COUNT = 4;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = getActivity();
selectColor = Color.parseColor("#029FFF");
unselectColor = Color.parseColor("#DDDDDD");
tabHost = new MyTabHost(context);
tabHost.setTabColor(selectColor, unselectColor);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_recommand, container, false);
tabLayout = (LinearLayout)view.findViewById(R.id.tabLayout);
tabLayout.setGravity(Gravity.CENTER_VERTICAL);
tabHost.setTabLayout(tabLayout);
contentLayout = (FrameLayout)view.findViewById(R.id.contentLayout);
tabHost.setContentLayout(contentLayout);
return view;
}
void addTab(VideoGroupData data) {
MyTab tab = tabHost.addTab(data.getTitle());
tab.setContent(data);
List<VideoItemData> videoItemList = data.getData();
int n = videoItemList.size();
List<VideoItemData> dataList = CommonUtils.getFirstNItems(videoItemList, n);
VideoGridAdapter videoAdapter = new VideoGridAdapter(context, dataList, false);
FixedGridLayout fixGridLayout = new FixedGridLayout(context);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT);
fixGridLayout.setLayoutParams(params);
int fragmentMeasuredWidth = getView().getMeasuredWidth();
int fragmentWidth = getView().getWidth();
Logger.i(TAG, "fragmentMeasuredWidth:"+fragmentMeasuredWidth);
Logger.i(TAG, "fragmentWidth:"+fragmentWidth);
fixGridLayout.setRowParams(fragmentMeasuredWidth / COLUMN_COUNT, COLUMN_COUNT);
fixGridLayout.setAdapter(videoAdapter);
ScrollView scrollView = new ScrollView(context);
params = new LayoutParams(LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
scrollView.setLayoutParams(params);
scrollView.addView(fixGridLayout);
tabHost.getContentLayout().addView(scrollView);
tabHost.setCurrentTab(tabHost.getTabCount() - 1);
}
}
布局文件fragment_recommend.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FF00FF"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#FFFFFF"
android:padding="1dp" >
<ImageButton
android:id="@+id/btnHide"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:background="@null"
android:padding="5dp"
android:scaleType="fitXY"
android:src="@drawable/hide" />
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@id/btnHide"
android:scrollbars="none" >
<LinearLayout
android:id="@+id/tabLayout"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal" >
</LinearLayout>
</HorizontalScrollView>
</RelativeLayout>
<FrameLayout
android:id="@+id/contentLayout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</FrameLayout>
</LinearLayout>