自定義水平自動換行佈局

import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.LinearLayout; public class LineBreakLayout extends LinearLayout {     private final static String TAG = "LineBreakLayout";     private final static int VIEW_MARGIN = 8;     public LineBreakLayout(Context context) {         super(context);     }     public LineBreakLayout(Context context, AttributeSet attrs, int defStyle) {         super(context, attrs, defStyle);     }     public LineBreakLayout(Context context, AttributeSet attrs) {         super(context, attrs);     }     @Override     protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {         final int count = getChildCount();         Log.d(TAG, "changed = " + arg0 + " left = " + arg1 + " top = " + arg2                 + " right = " + arg3 + " botom = " + arg4 + ", childcount = " + count);         int row = 0;// which row lay you view relative to parent         int lengthX = 0; // right position of child relative to parent         int lengthY = 0; // bottom position of child relative to parent         for (int i = 0; i < count; i++) {             final View child = this.getChildAt(i);             child.measure(0, 0);             int width = child.getMeasuredWidth();             int height = child.getMeasuredHeight();             lengthX += width + VIEW_MARGIN;             lengthY = row * (height + VIEW_MARGIN) + VIEW_MARGIN + height;             // if it can't drawing on a same line , skip to next line             if (lengthX > arg3 - arg1) {                 lengthX = width + VIEW_MARGIN;                 row++;                 lengthY = row * (height + VIEW_MARGIN) + VIEW_MARGIN + height;             }             child.layout(lengthX - width, lengthY - height, lengthX, lengthY);             Log.d(TAG, "child i = " + i + ", width = " + width + ", height = " + height + ", lengthX = " + lengthX + ", lengthY = " + lengthY);         }         ViewGroup.LayoutParams params = getLayoutParams();         params.height = lengthY + VIEW_MARGIN;     } }