flowlayout.zip

package com.ykt.common.widgets.flowlayout; import android.content.Context; import android.content.res.TypedArray; import android.os.Bundle; import android.os.Parcelable; import android.text.TextUtils; import android.util.AttributeSet; import android.util.Log; import android.view.View; import com.ykt.common.R; import java.util.HashSet; import java.util.Iterator; import java.util.Set; /** * Created by zhy on 15/9/10. */ public class TagFlowLayout extends FlowLayout implements TagAdapter.OnDataChangedListener { private TagAdapter mTagAdapter; private int mSelectedMax = -1;//-1为不限制数量 private static final String TAG = "TagFlowLayout"; private Set<Integer> mSelectedView = new HashSet<Integer>(); private OnSelectListener mOnSelectListener; private OnTagClickListener mOnTagClickListener; public interface OnSelectListener { void onSelected(Set<Integer> selectPosSet); } public interface OnTagClickListener { boolean onTagClick(View view, int position, FlowLayout parent); } public TagFlowLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.TagFlowLayout); mSelectedMax = ta.getInt(R.styleable.TagFlowLayout_max_select, -1); ta.recycle(); } public TagFlowLayout(Context context, AttributeSet attrs) { this(context, attrs, 0); } public TagFlowLayout(Context context) { this(context, null); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int cCount = getChildCount(); for (int i = 0; i < cCount; i++) { TagView tagView = (TagView) getChildAt(i); if (tagView.getVisibility() == View.GONE) { continue; } if (tagView.getTagView().getVisibility() == View.GONE) { tagView.setVisibility(View.GONE); } } super.onMeasure(widthMeasureSpec, heightMeasureSpec); } public void setOnSelectListener(OnSelectListener onSelectListener) { mOnSelectListener = onSelectListener; } public void setOnTagClickListener(OnTagClickListener onTagClickListener) { mOnTagClickListener = onTagClickListener; } public void setAdapter(TagAdapter adapter) { mTagAdapter = adapter; mTagAdapter.setOnDataChangedListener(this); mSelectedView.clear(); changeAdapter(); } @SuppressWarnings("ResourceType") private void changeAdapter() { removeAllViews(); TagAdapter adapter = mTagAdapter; TagView tagViewContainer = null; HashSet preCheckedList = mTagAdapter.getPreCheckedList(); for (int i = 0; i < adapter.getCount(); i++) { View tagView = adapter.getView(this, i, adapter.getItem(i)); tagViewContainer = new TagView(getContext()); tagView.setDuplicateParentStateEnabled(true); if (tagView.getLayoutParams() != null) { tagViewContainer.setLayoutParams(tagView.getLayoutParams()); } else { MarginLayoutParams lp = new MarginLayoutParams( LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); lp.setMargins(dip2px(getContext(), 5), dip2px(getContext(), 5), dip2px(getContext(), 5), dip2px(getContext(), 5)); tagViewContainer.setLayoutParams(lp); } LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); tagView.setLayoutParams(lp); tagViewContainer.addView(tagView); addView(tagViewContainer); if (preCheckedList.contains(i)) { setChildChecked(i, tagViewContainer); } if (mTagAdapter.setSelected(i, adapter.getItem(i))) { setChildChecked(i, tagViewContainer); } tagView.setClickable(false); final TagView finalTagViewContainer = tagViewContainer; final int position = i; tagViewContainer.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { doSelect(finalTagViewContainer, position); if (mOnTagClickListener != null) { mOnTagClickListener.onTagClick(finalTagViewContainer, position, TagFlowLayout.this); } } }); } mSelectedView.addAll(preCheckedList); } public void setMaxSelectCount(int count) { if (mSelectedView.size() > count) { Log.w(TAG, "you has already select more than " + count + " views , so it will be clear ."); mSelectedView.clear(); } mSelectedMax = count; } public Set<Integer> getSelectedList() { return new HashSet<Integer>(mSelectedView); } private void setChildChecked(int position, TagView view) { view.setChecked(true); mTagAdapter.onSelected(position, view.getTagView()); } private void setChildUnChecked(int position, TagView view) { view.setChecked(false); mTagAdapter.unSelected(position, view.getTagView()); } private void doSelect(TagView child, int position) { if (!child.isChecked()) { //处理max_select=1的情况 if (mSelectedMax == 1 && mSelectedView.size() == 1) { Iterator<Integer> iterator = mSelectedView.iterator(); Integer preIndex = iterator.next(); TagView pre = (TagView) getChildAt(preIndex); setChildUnChecked(preIndex, pre); setChildChecked(position, child); mSelectedView.remove(preIndex); mSelectedView.add(position); } else { if (mSelectedMax > 0 && mSelectedView.size() >= mSelectedMax) { return; } setChildChecked(position, child); mSelectedView.add(position); } } else { setChildUnChecked(position, child); mSelectedView.remove(position); } if (mOnSelectListener != null) { mOnSelectListener.onSelected(new HashSet<Integer>(mSelectedView)); } } public TagAdapter getAdapter() { return mTagAdapter; } private static final String KEY_CHOOSE_POS = "key_choose_pos"; private static final String KEY_DEFAULT = "key_default"; @Override protected Parcelable onSaveInstanceState() { Bundle bundle = new Bundle(); bundle.putParcelable(KEY_DEFAULT, super.onSaveInstanceState()); String selectPos = ""; if (mSelectedView.size() > 0) { for (int key : mSelectedView) { selectPos += key + "|"; } selectPos = selectPos.substring(0, selectPos.length() - 1); } bundle.putString(KEY_CHOOSE_POS, selectPos); return bundle; } @Override protected void onRestoreInstanceState(Parcelable state) { if (state instanceof Bundle) { Bundle bundle = (Bundle) state; String mSelectPos = bundle.getString(KEY_CHOOSE_POS); if (!TextUtils.isEmpty(mSelectPos)) { String[] split = mSelectPos.split("\\|"); for (String pos : split) { int index = Integer.parseInt(pos); mSelectedView.add(index); TagView tagView = (TagView) getChildAt(index); if (tagView != null) { setChildChecked(index, tagView); } } }