Android实现简单下拉筛选框

public class ExpandTabView extends LinearLayout implements OnDismissListener {  private ToggleButton selectedButton; private ArrayList<String> mTextArray = new ArrayList<String>(); private ArrayList<RelativeLayout> mViewArray = new ArrayList<RelativeLayout>(); private ArrayList<ToggleButton> mToggleButton = new ArrayList<ToggleButton>(); private Context mContext; private final int SMALL = 0; private int displayWidth; private int displayHeight; private PopupWindow popupWindow; private int selectPosition;  public ExpandTabView(Context context) { super(context); init(context); }  public ExpandTabView(Context context, AttributeSet attrs) { super(context, attrs); init(context); }  /** * 根据选择的位置设置tabitem显示的值 */ public void setTitle(String valueText, int position) { if (position < mToggleButton.size()) { mToggleButton.get(position).setText(valueText); } }  public void setTitle(String title){  } /** * 根据选择的位置获取tabitem显示的值 */ public String getTitle(int position) { if (position < mToggleButton.size() && mToggleButton.get(position).getText() != null) { return mToggleButton.get(position).getText().toString(); } return ""; }  /** * 设置tabitem的个数和初始值 */ public void setValue(ArrayList<String> textArray, ArrayList<View> viewArray) { if (mContext == null) { return; } LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  mTextArray = textArray; for (int i = 0; i < viewArray.size(); i++) { final RelativeLayout r = new RelativeLayout(mContext); int maxHeight = (int) (displayHeight * 0.7); RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, maxHeight); rl.leftMargin = 10; rl.rightMargin = 10; r.addView(viewArray.get(i), rl); mViewArray.add(r); r.setTag(SMALL); ToggleButton tButton = (ToggleButton) inflater.inflate(R.layout.toggle_button, this, false); addView(tButton); View line = new TextView(mContext); line.setBackgroundResource(R.drawable.choosebar_line); if (i < viewArray.size() - 1) { LayoutParams lp = new LayoutParams(2, LayoutParams.FILL_PARENT); addView(line, lp); } mToggleButton.add(tButton); tButton.setTag(i); tButton.setText(mTextArray.get(i));  r.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) {  onPressBack(); } });  r.setBackgroundColor(mContext.getResources().getColor(R.color.popup_main_background)); tButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) {  // initPopupWindow();  ToggleButton tButton = (ToggleButton) view;   if (selectedButton != null && selectedButton != tButton) {  selectedButton.setChecked(false);  }  selectedButton = tButton;  selectPosition = (Integer) selectedButton.getTag();  startAnimation();  if (mOnButtonClickListener != null && tButton.isChecked()) {  mOnButtonClickListener.onClick(selectPosition);  } } }); } }  private void startAnimation() {  if (popupWindow == null) { popupWindow = new PopupWindow(mViewArray.get(selectPosition), displayWidth, displayHeight); popupWindow.setAnimationStyle(R.style.PopupWindowAnimation);  popupWindow.setFocusable(false); popupWindow.setOutsideTouchable(true); }  if (selectedButton.isChecked()) { if (!popupWindow.isShowing()) { showPopup(selectPosition); } else { popupWindow.setOnDismissListener(this); popupWindow.dismiss(); hideView(); } } else { if (popupWindow.isShowing()) { popupWindow.dismiss(); hideView(); } } }  private void showPopup(int position) { View tView = mViewArray.get(selectPosition).getChildAt(0); if (tView instanceof ViewBaseAction) { ViewBaseAction f = (ViewBaseAction) tView; f.show(); } if (popupWindow.getContentView() != mViewArray.get(position)) { popupWindow.setContentView(mViewArray.get(position)); } popupWindow.showAsDropDown(this, 0, 0); }  /** * 如果菜单成展开状态，则让菜单收回去 */ public boolean onPressBack() { if (popupWindow != null && popupWindow.isShowing()) { popupWindow.dismiss(); hideView(); if (selectedButton != null) { selectedButton.setChecked(false); } return true; } else { return false; }  }  private void hideView() { View tView = mViewArray.get(selectPosition).getChildAt(0); if (tView instanceof ViewBaseAction) { ViewBaseAction f = (ViewBaseAction) tView; f.hide(); } }  private void init(Context context) { mContext = context; displayWidth = ((Activity) mContext).getWindowManager().getDefaultDisplay().getWidth(); displayHeight = ((Activity) mContext).getWindowManager().getDefaultDisplay().getHeight(); setOrientation(LinearLayout.HORIZONTAL); }  @Override public void onDismiss() { showPopup(selectPosition); popupWindow.setOnDismissListener(null); }  private OnButtonClickListener mOnButtonClickListener;  /** * 设置tabitem的点击监听事件 */ public void setOnButtonClickListener(OnButtonClickListener l) { mOnButtonClickListener = l; }  /** * 自定义tabitem点击回调接口 */ public interface OnButtonClickListener { public void onClick(int selectPosition); } }

public class MainActivity extends AppCompatActivity {   private ExpandTabView expandTabView; private ArrayList<View> mViewArray = new ArrayList<View>(); private ViewLeft viewLeft; private ViewMiddle viewMiddle; private ViewRight viewRight;  @Override protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  initView();  initVaule();  initListener();  }  private void initView() {   expandTabView = (ExpandTabView) findViewById(R.id.expandtab_view);  viewLeft = new ViewLeft(this);  viewMiddle = new ViewMiddle(this);  viewRight = new ViewRight(this);  }  private void initVaule() {  mViewArray.add(viewMiddle); mViewArray.add(viewLeft); mViewArray.add(viewRight);  ArrayList<String> mTextArray = new ArrayList<String>();  mTextArray.add("区域"); mTextArray.add("距离"); mTextArray.add("距离");   expandTabView.setValue(mTextArray, mViewArray);// expandTabView.setTitle(viewLeft.getShowText(), 0);// expandTabView.setTitle(viewMiddle.getShowText(), 1);// expandTabView.setTitle(viewRight.getShowText(), 2);  }  private void initListener() {   viewLeft.setOnSelectListener(new ViewLeft.OnSelectListener() {    @Override   public void getValue(String distance, String showText) {    onRefresh(viewLeft, showText);   }  });   viewMiddle.setOnSelectListener(new ViewMiddle.OnSelectListener() {    @Override   public void getValue(String showText) {     onRefresh(viewMiddle,showText);    }  });   viewRight.setOnSelectListener(new ViewRight.OnSelectListener() {    @Override   public void getValue(String distance, String showText) {    onRefresh(viewRight, showText);   }  });  }  private void onRefresh(View view, String showText) {   expandTabView.onPressBack();  int position = getPositon(view);  if (position >= 0 && !expandTabView.getTitle(position).equals(showText)) {   expandTabView.setTitle(showText, position);  }//  Toast.makeText(MainActivity.this, showText, Toast.LENGTH_SHORT).show();  }  private int getPositon(View tView) {  for (int i = 0; i < mViewArray.size(); i++) {   if (mViewArray.get(i) == tView) {    return i;   }  }  return -1; }  @Override public void onBackPressed() {   if (!expandTabView.onPressBack()) {   finish();  }  } }

@Override public void showAsDropDown(View anchor, int xoff, int yoff) {  if(Build.VERSION.SDK_INT >= 24) {   Rect rect = new Rect();   anchor.getGlobalVisibleRect(rect);   int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;   setHeight(h);  }  super.showAsDropDown(anchor, xoff, yoff); }