增加行居中显示

Author: LRH1993

app/src/main/java/com/example/lvruheng/autoflowlayout/AutoFlowLayout.java

@@ -19,6 +19,10 @@ public class AutoFlowLayout <T> extends LinearLayout {
  * 存储所有的View，按行记录
  */
  private List<List<View>> mAllViews = new ArrayList<List<View>>();
+ /**
+ * 记录每一行的宽度
+ */
+ private List<Integer> mWidthList = new ArrayList<>();
  /**
  * 记录设置单行显示的标志
  */
@@ -104,6 +108,10 @@ public class AutoFlowLayout <T> extends LinearLayout {
  *记录分割线的长度
  */
  private int mCutLineColor;
+ /**
+ * 是否每行居中处理
+ */
+ private boolean mIsCenter;
  public AutoFlowLayout(Context context) {
  super(context);
  }
@@ -129,6 +137,7 @@ private void init(Context context, AttributeSet attrs) {
  mCutLineColor = ta.getColor(R.styleable.AutoFlowLayout_cutLineColor,getResources().getColor(android.R.color.darker_gray));
  mCutLineWidth = ta.getDimension(R.styleable.AutoFlowLayout_cutLineWidth,1f);
  mIsCutLine = ta.getBoolean(R.styleable.AutoFlowLayout_cutLine,false);
+ mIsCenter = ta.getBoolean(R.styleable.AutoFlowLayout_lineCenter,false);
  if (mColumnNumbers != 0) {
  mIsGridMode = true;
  }
@@ -352,6 +361,7 @@ private void setFlowLayout() {
  mLineHeight.add(lineHeight);
  // 将当前行的childView保存，然后开启新的ArrayList保存下一行的childView
  mAllViews.add(lineViews);
+ mWidthList.add(lp.leftMargin + lp.rightMargin + getPaddingRight() + lineWidth);
  lineWidth = 0;// 重置行宽
  lineViews = new ArrayList<View>();
  mCount++;
@@ -375,7 +385,7 @@ private void setFlowLayout() {
  // 记录最后一行
  mLineHeight.add(lineHeight);
  mAllViews.add(lineViews);
-
+ mWidthList.add(lineWidth);
  int left = getPaddingLeft();
  int top = getPaddingTop();
  // 得到总行数
@@ -388,6 +398,11 @@ private void setFlowLayout() {
  lineViews = mAllViews.get(i);
  // 当前行的最大高度
  lineHeight = mLineHeight.get(i);
+ if (mIsCenter) {
+ if (mWidthList.get(i)<getWidth()) {
+ left +=(getWidth()-mWidthList.get(i))/2;
+ }
+ }
  // 遍历当前行所有的View
  for (int j = 0; j < lineViews.size(); j++) {
  final View child = lineViews.get(j);
@@ -805,6 +820,22 @@ public boolean hasCutLine() {
  return mIsCutLine;
  }
 
+ /**
+ * 设置是否进行行居中显示
+ * @param isCenter
+ */
+ public void setLineCenter(boolean isCenter) {
+ mIsCenter = isCenter;
+ }
+
+ /**
+ * 是否设置了行居中显示
+ * @return
+ */
+ public boolean isLineCenter() {
+ return mIsCenter;
+ }
+
  public interface OnItemClickListener{
  void onItemClick(int position,View view);
  }

app/src/main/java/com/example/lvruheng/autoflowlayout/MainActivity.java

@@ -22,8 +22,8 @@ protected void onCreate(Bundle savedInstanceState) {
  @Override
  public View getView(int position) {
  View item = mLayoutInflater.inflate(R.layout.sub_item, null);
-// TextView tvAttrTag = (TextView) item.findViewById(R.id.tv_attr_tag);
-// tvAttrTag.setText(mData[position]);
+ TextView tvAttrTag = (TextView) item.findViewById(R.id.tv_attr_tag);
+ tvAttrTag.setText(mData[position]);
  return item;
  }
  });

app/src/main/res/layout/activity_main.xml

@@ -7,9 +7,7 @@
 
  <com.example.lvruheng.autoflowlayout.AutoFlowLayout
  android:id="@+id/afl_cotent"
- app:columnNumbers="3"
- app:rowNumbers="3"
- app:cutLine="true"
+ app:lineCenter = "true"
  android:layout_width="match_parent"
  android:layout_height="match_parent"/>
 </RelativeLayout>