自定义的Viewpager
在LinearLayout里面添加一个viewpager与一个RadioGroup，构成一个自定义的CustomViewPager，可设置RadioGroup的位置，RadioButton的风格。
代码如下：import android.annotation.SuppressLint;import android.content.Context;import android.content.res.ColorStateList;import android.graphics.Color;import android.graphics.drawable.StateListDrawable;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.util.AttributeSet;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.FrameLayout;import android.widget.LinearLayout;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;{private RadioGroup rg;private ViewPager pager;private PagerType defaultType = PagerType.LINEAR_TOP;public CustomViewPager(Context context) {super(context);setType(defaultType);}@SuppressLint(“NewApi”)public CustomViewPager(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);setType(defaultType);}public CustomViewPager(Context context, AttributeSet attrs) {super(context, attrs);setType(defaultType);}(PagerType type) {defaultType = type;initView(type);initPager();}public enum PagerType {LINEAR_TOP, LINEAR_BOTTOM, FRAME_TOP_CENTER, FRAME_TOP_RIGHT, FRAME_TOP_LEFT, FRAME_BOTTOM_CENTER, FRAME_BOTTOM_RIGHT, FRAME_BOTTOM_LEFT}(PagerType type) {removeAllViews();rg = new RadioGroup(getContext());rg.setOrientation(RadioGroup.HORIZONTAL);rg.setGravity(Gravity.CENTER);rg.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT));pager = new ViewPager(getContext());pager.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT));switch (type) {case LINEAR_TOP:case LINEAR_BOTTOM:llAddView(type);break;case FRAME_TOP_CENTER:case FRAME_TOP_RIGHT:case FRAME_TOP_LEFT:case FRAME_BOTTOM_CENTER:case FRAME_BOTTOM_RIGHT:case FRAME_BOTTOM_LEFT:fmAddView(type);break;}}(PagerType type) {LinearLayout ll = new LinearLayout(getContext());ll.setOrientation(LinearLayout.VERTICAL);LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f);pager.setLayoutParams(params);switch (type) {case LINEAR_TOP:ll.addView(rg);ll.addView(pager);break;case LINEAR_BOTTOM:ll.addView(pager);ll.addView(rg);break;default:break;}addView(ll);}(PagerType type) {FrameLayout fm = new FrameLayout(getContext());android.widget.FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT,FrameLayout.LayoutParams.WRAP_CONTENT);switch (type) {case FRAME_TOP_CENTER:params.gravity = Gravity.CENTER_HORIZONTAL;break;case FRAME_TOP_RIGHT:params.gravity = Gravity.RIGHT;break;case FRAME_TOP_LEFT:params.gravity = Gravity.LEFT;break;case FRAME_BOTTOM_CENTER:params.gravity = Gravity.BOTTOM;break;case FRAME_BOTTOM_RIGHT:params.gravity = Gravity.BOTTOM | Gravity.RIGHT;break;case FRAME_BOTTOM_LEFT:params.gravity = Gravity.BOTTOM | Gravity.LEFT;break;default:break;}rg.setLayoutParams(params);fm.addView(pager);fm.addView(rg);addView(fm);}(PagerAdapter adapter) {pager.setAdapter(adapter);if (adapter.getCount() > 0) {View v = rg.getChildAt(0);if (v instanceof RadioButton) {RadioButton rb = (RadioButton) v;rb.setChecked(true);}}}public RadioGroup getRg() {return rg;}(RadioGroup rg) {this.rg = rg;}@SuppressLint(“NewApi”)(String[] strs, int normalColor,int checkedColor, float fontSize) {rg.removeAllViews();if (normalColor <= 0) {normalColor = Color.WHITE;}if (checkedColor <= 0) {checkedColor = Color.BLUE;}for (String text : strs) {RadioButton rb = new RadioButton(getContext());rb.setText(text);rb.setButtonDrawable(android.R.color.transparent);rb.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);ColorStateList color = SelectorHepler.getInstance().getCheckedSelectorColor(normalColor, checkedColor);rb.setTextColor(color);rb.setTextSize(fontSize);rb.setGravity(Gravity.CENTER);if (defaultType == PagerType.LINEAR_TOP|| defaultType == PagerType.LINEAR_BOTTOM) {RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(RadioGroup.LayoutParams.WRAP_CONTENT,RadioGroup.LayoutParams.MATCH_PARENT, 1.0f);rb.setLayoutParams(params);}rg.addView(rb);}}(int nums,int size,int… color) {rg.removeAllViews();int normalColor=Color.WHITE;int checkedColor=Color.BLUE;if (color!=null&&color.length>=2) {normalColor = color[0];checkedColor = color[1];}for (int i = 0; i < nums; i++) {RadioButton rb = new RadioButton(getContext());rb.setGravity(Gravity.CENTER);TextDrawable normal = TextDrawable.builder().buildRound(“”,normalColor);TextDrawable checked = TextDrawable.builder().buildRound(“”,checkedColor);StateListDrawable selector = SelectorHepler.getInstance().getCheckedSelectorDrawable( normal, checked);RadioGroup.LayoutParams params = new RadioGroup.LayoutParams(size,size);params.setMargins(10, 10, 10, 10);rb.setLayoutParams(params);rb.setButtonDrawable(android.R.color.transparent);rb.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);rb.setBackgroundDrawable(selector);rg.addView(rb);}}() {pager.setOnPageChangeListener(new OnPageChangeListener() {(int p) {RadioButton childAt = (RadioButton) rg.getChildAt(p);childAt.setChecked(true);}(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}(int arg0) {// TODO Auto-generated method stub}});rg.setOnCheckedChangeListener(new OnCheckedChangeListener() {(RadioGroup rg, int rid) {int count = rg.getChildCount();int num = 0;for (int i = 0; i < count; i++) {if (rg.getChildAt(i).getId() == rid) {num = i;break;}}pager.setCurrentItem(num);}});}}积极思考造成积极人生，消极思考造成消极人生。
