Android-Tab single-choice control, android-tab single-choice control

Android-Tab single-choice control, android-tab single-choice control

Today, we can see that one of the controls in the project is very beautiful. It is said that it is an open-source control on github and the address is not found, as shown in. Very common results: switch back and forth between several tab pages:

Reprinted please indicate the source: http://blog.csdn.net/goldenfish1919/article/details/46799341

FlatTabGroup. java:

Public class FlatTabGroup extends RadioGroup implements RadioGroup. onCheckedChangeListener {public FlatTabGroup (Context context) {this (context, null);} private int mRadius; private int mStroke; private int mHighlightColor; private String [] mItemString; private float mTextSize; private ColorStateList mTextColor; private int [] mTabViewIds; private OnTabCheckedListener mTabCheckedListener; public F LatTabGroup (Context context, AttributeSet attrs) {super (context, attrs); setOrientation (HORIZONTAL); setGravity (Gravity. CENTER_VERTICAL); TypedArray array = context. obtainStyledAttributes (attrs, R. styleable. flatTabGroup); mHighlightColor = array. getColor (R. styleable. flatTabGroup_tab_border_color, Color. WHITE); mStroke = array. getDimensionPixelSize (R. styleable. flatTabGroup_tab_border_width, 2); mR Adius = array. getDimensionPixelOffset (R. styleable. flatTabGroup_tab_radius, 5); mTextColor = array. getColorStateList (R. styleable. flatTabGroup_tab_textColor); mTextSize = array. getDimensionPixelSize (R. styleable. flatTabGroup_tab_textSize, 14); int id = array. getResourceId (R. styleable. flatTabGroup_tab_items, 0); array. recycle (); mItemString = isInEditMode ()? New String [] {"tab a", "tab B", "TAB C"}: context. getResources (). getStringArray (id); generateTabView (context, attrs); super. setOnCheckedChangeListener (this);} private void generateTabView (Context context, AttributeSet attrs) {if (mItemString = null) {return;} mTabViewIds = new int [mItemString. length]; for (int I = 0; I <mItemString. length; I ++) {<span style = "white-space: pre"> </span> String tex T = mItemString [I]; RadioButton button = new RadioButton (context, attrs); button. setGravity (Gravity. CENTER); button. setButtonDrawable (android. r. color. transparent); button. setText (text); button. setTextColor (mTextColor); button. setTextSize (TypedValue. COMPLEX_UNIT_PX, mTextSize); button. setId (mTabViewIds [I] = generateViewIds (); LayoutParams lp = new LayoutParams (ViewGroup. layoutParams. MATCH_PARENT, ViewGroup. layoutParams. MATCH_PARENT, 1); if (I <mItemString. length-1) {<span style = "white-space: pre"> </span> lp. rightMargin =-1 * mStroke;} addView (button, lp) ;}} public void setOnTabCheckedListener (OnTabCheckedListener listener) {mTabCheckedListener = listener;} public void setSelection (int position) {check (getChildAt (position ). getId ();} @ Override public void onCheckedChanged (RadioGroup Group, int checkedId) {if (mTabCheckedListener! = Null) {int checkedPosition =-1; for (int I = 0; I <mTabViewIds. length; I ++) {if (mTabViewIds [I] = checkedId) {checkedPosition = I; break ;}} mTabCheckedListener. onChecked (this, checkedPosition) ;}@ Override protected void onFinishInflate () {super. onFinishInflate (); updateChildBackground () ;}@ SuppressWarnings ("deprecation") private void updateChildBackground () {for (int I = 0; I <getChildCount (); I ++) {View child = getChildAt (I); if (child instanceof RadioButton) {child. extends (generateTabBackground (I, mHighlightColor) ;}} private Drawable generateTabBackground (int position, int color) {// how to define selector StateListDrawable stateListDrawable = new StateListDrawable () using code (); stateListDrawable. addState (new int [] {android. r. attr. state_checked}, generateDrawable (position, color); stateListDrawable. addState (new int [] {}, generateDrawable (position, Color. TRANSPARENT); return stateListDrawable;} private Drawable generateDrawable (int position, int color) {float [] radius; if (position = 0) {radius = new float [] {mRadius, mRadius, 0, 0, 0, 0, mRadius, mRadius };} else if (position = getChildCount ()-1) {radius = new float [] {0, 0, mRadius, 0, 0 };} else {radius = new float [] {0, 0, 0, 0, 0, 0, 0, 0};} GradientDrawable shape = new GradientDrawable (); // how to generate a rounded shape using code. setCornerRadii (radius); shape. setColor (color); shape. setStroke (mStroke, mHighlightColor); return shape;} private static final AtomicInteger sNextGeneratedId = new AtomicInteger (1 ); // how to use custom id/*** Generate a value suitable for use in {@ link # setId (int )}. this value will * not collide with ID values generated at build time by aapt for R. id. ** @ return a generated ID value */public static int generateViewIds () {for (;) {final int result = sNextGeneratedId. get (); // aapt-generated IDs have the high byte nonzero; clamp to the range // under that. int newValue = result + 1; if (newValue> 0x00FFFFFF) newValue = 1; // Roll over to 1, not 0. if (sNextGeneratedId. compareAndSet (result, newValue) {return result ;}} public static interface OnTabCheckedListener {public void onChecked (FlatTabGroup group, int position );}}

Here are a few interesting points:

(1) how to use code as selector

(2) how to use code to generate rounded corners

(3) how to use a custom id

Attr_flat_tab_group.xml:

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="FlatTabGroup">        <attr name="tab_items" format="reference" />        <attr name="tab_border_width" format="dimension|reference" />        <attr name="tab_border_color" format="color|reference" />        <attr name="tab_radius" format="dimension|reference" />        <attr name="tab_textColor" format="reference" />        <attr name="tab_textSize" format="dimension|reference" />    </declare-styleable></resources>

Arrays_flat_tab_group.xml:

<? Xml version = "1.0" encoding = "UTF-8"?> <Resources> <string-array name = "array_tabs_more_video"> <item> real-time live broadcast </item> <item> live broadcast reservation </item> <item> wonderful playback </item> </string-array> </resources>

When referencing:

<com.example.view.FlatTabGroup         android:id="@+id/flat_tab_group"         android:layout_width="match_parent"         android:layout_height="50dp"         android:paddingBottom="5dp"         android:paddingTop="5dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp"         android:layout_gravity="center_vertical"         app:tab_border_color="#cdcdcd"         app:tab_border_width="1dp"         app:tab_items="@array/array_tabs_more_video"         app:tab_radius="5dp"         app:tab_textColor="@android:color/black"         app:tab_textSize="16sp"/>

      FlatTabGroup tabs = (FlatTabGroup)this.findViewById(R.id.flat_tab_group);      tabs.setOnTabCheckedListener(new OnTabCheckedListener(){@Overridepublic void onChecked(FlatTabGroup group, int position) {Toast.makeText(MainActivity.this, ""+position, Toast.LENGTH_SHORT).show();}      });      tabs.setSelection(0);

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