最近接到一個新的專案 專案時間比較緊張,有一個功能類似於58同城,京東的一個下拉篩選框,為了節省時間,從網上面拷貝了一份封裝好的程式碼,進行的自己的一些修改,感覺靈活性還挺高的,分享出來給大家看一看

大致效果如下 可以自己加入自己的佈局

先看一下這個ExpandTabView這個類  程式碼比較簡單 我就不做具體介紹了 有不懂的可以私信我

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);
	}

	/**
	 * 根據選擇的位置設定tabitem顯示的值
	 */
	public void setTitle(String valueText, int position) {
		if (position < mToggleButton.size()) {
			mToggleButton.get(position).setText(valueText);
		}
	}

	public void setTitle(String title){
		
	}
	/**
	 * 根據選擇的位置獲取tabitem顯示的值
	 */
	public String getTitle(int position) {
		if (position < mToggleButton.size() && mToggleButton.get(position).getText() != null) {
			return mToggleButton.get(position).getText().toString();
		}
		return "";
	}

	/**
	 * 設定tabitem的個數和初始值
	 */
	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);
	}

	/**
	 * 如果選單成展開狀態，則讓選單收回去
	 */
	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;

	/**
	 * 設定tabitem的點選監聽事件
	 */
	public void setOnButtonClickListener(OnButtonClickListener l) {
		mOnButtonClickListener = l;
	}

	/**
	 * 自定義tabitem點選回撥介面
	 */
	public interface OnButtonClickListener {
		public void onClick(int selectPosition);
	}

}
 

外部設定的話 也特別簡單,只需要將自己定義好的佈局傳入到list集合中就可以

下面是MainActivity中的程式碼

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("區域");
		mTextArray.add("距離");
		mTextArray.add("距離");

        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();
        }

    }

}
 

 但是在專案中使用的時候碰到了一個問題,就是popupwindow在7.0的手機上彈出位置異常的問題,查了一下,是因為手機狀態列高度的問題

 於是重寫了一下popupwindow的showAsDropDown方法就解決了 下面是具體程式碼

    @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);
    }
 

通過對SDK版本來進行判斷 大於24的話就執行這個方法 解決了popupwindow在7.0手機上異常彈出的問題