androi自定义自动换行的View（类似网页的标签Tag）

看来只有礼拜天才有时间写点博客啊，平时只能埋头苦干了。今天在公司加班，遇到一个需求，就是自动换行的TextView，有点像网页的tag标签，点击一下，就自动加上去了，不过这个是根据后台拿来的数据来显示多少个View，在网上找找，看见了许多，我自己也封装写一个吧，以便以后需要...开工

package com.woyou.ui.component;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import com.citaq.ideliver.R;/** * 自动换行的View *  * @author shenzhou2015年1月11日 */public class WordWrapView extends ViewGroup {private static final int PADDING_HOR = 10;// 水平方向paddingprivate static final int PADDING_VERTICAL = 15;// 垂直方向paddingprivate static final int SIDE_MARGIN = 10;// 左右间距private static final int TEXT_MARGIN = 10;public WordWrapView(Context context) {super(context);}public WordWrapView(Context context, AttributeSet attrs) {super(context, attrs);}public WordWrapView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {int childCount = getChildCount();int autualWidth = r - l;int x = SIDE_MARGIN;// 横坐标开始int y = 0;// 纵坐标开始int rows = 1;for (int i = 0; i < childCount; i++) {View view = getChildAt(i);view.setBackgroundResource(R.drawable.shopdetail_keytag_bg);int width = view.getMeasuredWidth();int height = view.getMeasuredHeight();x += width + TEXT_MARGIN;if (x > autualWidth) {x = width + SIDE_MARGIN;rows++;}y = rows * (height + TEXT_MARGIN);if (i == 0) {view.layout(x - width - TEXT_MARGIN, y - height, x- TEXT_MARGIN, y);} else {view.layout(x - width, y - height, x, y);}}}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int x = 0;// 横坐标int y = 0;// 纵坐标int rows = 1;// 总行数int specWidth = MeasureSpec.getSize(widthMeasureSpec);int actualWidth = specWidth - SIDE_MARGIN * 2;// 实际宽度int childCount = getChildCount();for (int index = 0; index < childCount; index++) {View child = (TextView) getChildAt(index);child.setPadding(PADDING_HOR, PADDING_VERTICAL, PADDING_HOR,PADDING_VERTICAL);child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);int width = child.getMeasuredWidth();int height = child.getMeasuredHeight();x += width + TEXT_MARGIN;if (x > actualWidth) {// 换行x = width;rows++;}y = rows * (height + TEXT_MARGIN);}setMeasuredDimension(actualWidth, y);}}

具体使用：

我的项目的布局文件太长了，我就说了

<com.woyou.ui.component.WordWrapView               style="@style/shopDetailTextStyle"               android:id="@+id/shopdetail_container"               android:layout_width="match_parent"               android:layout_height="wrap_content"               android:orientation="vertical"               android:paddingLeft="@dimen/dp20"               android:paddingRight="@dimen/dp20"               android:paddingTop="@dimen/dp10" />

把这段布局文件加到你要把文字自动换行的地方。java文件中的使用：

if ( !TextUtils.isEmpty(shopDetail.getInfo()) ) {infoLin.setVisibility(View.VISIBLE);//店铺关键字String key = shopDetail.getKey();strs = key.split("\\|");for (int i = 0; i < strs.length; i++) {      TextView textview = new TextView(mActivity);      textview.setText(strs[i]);      wordWrapView.addView(textview);}LogUtil.i(TAG, "tags:" + strs.toString());

前面还有找到控件什么的，我相信大家都是知道的。这只是核心代码，效果图如下：

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**********************介绍另外一种方法，是某个大神写的，不过没封装，供大家参考***********************************

****************************************************************************************************************************

 /** 标签之间的间距 px */      private final int itemMargins = (int) getContext().getResources().getDimension(R.dimen.dp15);      /** 标签的行间距 px */      private final int lineMargins = (int) getContext().getResources().getDimension(R.dimen.dp10);  

/** * 加载店铺关键字 * @param tags */private void loadShopKeys (String[] tags) {if ( tags == null )return;final int containerWidth = container.getMeasuredWidth() - container.getPaddingRight()  - container.getPaddingLeft();          final LayoutInflater inflater = mActivity.getLayoutInflater();          /** 用来测量字符的宽度 */          final Paint paint = new Paint();          final TextView textView = (TextView) inflater.inflate(R.layout.item_textviewtag_lv, null);          final int itemPadding = textView.getCompoundPaddingLeft() + textView.getCompoundPaddingRight();          final LinearLayout.LayoutParams tvParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,  LayoutParams.WRAP_CONTENT);          tvParams.setMargins(0, 0, itemMargins, 0);          paint.setTextSize(textView.getTextSize());          LinearLayout layout = new LinearLayout(getContext());          layout.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));          layout.setOrientation(LinearLayout.HORIZONTAL);          container.addView(layout);          final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);          params.setMargins(0, lineMargins, 0, 0);          /** 一行剩下的空间 **/          int remainWidth = containerWidth;          for (int i = 0; i < tags.length; ++i) {              final String text = tags[i];              final float itemWidth = paint.measureText(text) + itemPadding;              if (remainWidth > itemWidth) {                  addItemView(inflater, layout, tvParams, text);              } else {                  resetTextViewMarginsRight(layout);                  layout = new LinearLayout(getContext());                  layout.setLayoutParams(params);                  layout.setOrientation(LinearLayout.HORIZONTAL);                  /** 将前面那一个textview加入新的一行 */                  addItemView(inflater, layout, tvParams, text);                  container.addView(layout);                  remainWidth = containerWidth;              }              remainWidth = (int) (remainWidth - itemWidth + 0.5f) - itemMargins;          }          resetTextViewMarginsRight(layout);      }  /***************** 将每行最后一个textview的MarginsRight去掉 *********************************/      private void resetTextViewMarginsRight(ViewGroup viewGroup) {          final TextView tempTx = (TextView) viewGroup.getChildAt(viewGroup.getChildCount() - 1);          tempTx.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));      }        private void addItemView(LayoutInflater inflater, ViewGroup viewGroup, android.widget.LinearLayout.LayoutParams tvParams, String text) {          final TextView itemTx = (TextView) inflater.inflate(R.layout.item_textviewtag_lv, null);          itemTx.setText(text);          viewGroup.addView(itemTx, tvParams);      }  

好了，到此结束了，屌丝要继续加班了，话说都好几天没打LoL，有点怀念了，等这段时间过了，本吊要撸到天明...