1、自定义ViewGroup
/**
* Created by Administrator on 2016/2/26.
*
* --------自动换行的ViewGroup-----------
*/
public class LineWrapLayout extends ViewGroup {
private static final boolean DEBUG = true;
private static final String TAG = "AutoLineFeedLayout"; /**
* 左间距
*/
private int paddingLeft = 10;
/**
* 右间距
*/
private int paddingRight = 10;
/**
*
*/
private int paddingTop = 10;
/**
*
*/
private int paddingBottom = 10; /**
* 水平方向间距
*/
private int horizontalSpace = 10;
/**
* 行间距
*/
private int verticalSpace = 5; private List<Integer> listX;
private List<Integer> listY; public LineWrapLayout(Context context) {
super(context); }
public LineWrapLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init(attrs);
} public LineWrapLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(attrs);
} @Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if(DEBUG) Log.d(TAG, "--- onLayout changed :" + changed + " l :" + l + ",t :" + t + ",r :" + r + ",b :" + b);
int count = getChildCount();
int width = getWidth();
Log.i(TAG, "宽度 :"+width); int startOffsetX = paddingLeft;// 横坐标开始
int startOffsety = 0;//纵坐标开始
int rowCount = 1; int preEndOffsetX = startOffsetX; for (int i = 0; i < count; i++) {
final View childView = getChildAt(i); int w = childView.getMeasuredWidth();
int h = childView.getMeasuredHeight(); int x = listX.get(i);
int y = listY.get(i); // 布局子控件
childView.layout(x, y, x + w, y + h);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
if(DEBUG) Log.v(TAG, "--- onMeasure()"); int count = getChildCount();
int width = measureWidth(widthMeasureSpec);
Log.i(TAG, "宽度 :"+width); int startOffsetX = paddingLeft;// 横坐标开始
int startOffsety = 0+paddingTop;//纵坐标开始
int rowCount = 1; int preEndOffsetX = startOffsetX; listX.clear();
listY.clear();
for (int i = 0; i < count; i++) {
Log.v(TAG, "----");
final View childView = getChildAt(i);
// 设置子空间Child的宽高
childView.measure(0,0);
/* 获取子控件Child的宽高 */
int childWidth = childView.getMeasuredWidth();
int childHeight = childView.getMeasuredHeight();
Log.v(TAG, "childWidth :"+childWidth+" childHeight :"+childHeight);
preEndOffsetX = startOffsetX + childWidth /*+ CHILD_MARGIN*/;
//TODO [yaojian]margin属性？
if (preEndOffsetX > width - paddingRight ) {
if (startOffsetX > paddingLeft) {
/* 换行 */
startOffsetX = paddingLeft;
startOffsety += childHeight+verticalSpace;
rowCount++;
}
}
Log.d(TAG, "measure child :"+startOffsetX+", "+startOffsety+", "+preEndOffsetX+", "+(startOffsety+childHeight));
listX.add(startOffsetX);
listY.add(startOffsety); // childView.layout(startOffsetX, startOffsety, preEndOffsetX, startOffsety+childHeight);
startOffsetX = startOffsetX + childWidth + horizontalSpace;
}
int lastLineHeight = 0;
View lastChild = getChildAt(count-1);
if(null != lastChild){
lastLineHeight = lastChild.getMeasuredHeight();
}
setMeasuredDimension(measureWidth(widthMeasureSpec), startOffsety+lastLineHeight+paddingBottom);
// super.onMeasure(widthMeasureSpec, heightMeasureSpec); // 注意setMeasuredDimension和resolveSize的用法
// setMeasuredDimension(resolveSize(measuredWidth, widthMeasureSpec),
// resolveSize(top, heightMeasureSpec));
} private int measureWidth(int measureSpec) {
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec); // Default size if no limits are specified.
int result = 400; if (specMode == MeasureSpec.AT_MOST) {
// Calculate the ideal size of your control
// within this maximum size.
// If your control fills the available space
// return the outer bound.
result = specSize;
} else if (specMode == MeasureSpec.EXACTLY) {
// If your control can fit within these bounds return that value.
result = specSize;
}
return result;
} private void init(AttributeSet attrs) {
TypedArray attrArray = getContext().obtainStyledAttributes(attrs, R.styleable.AutoLineFeedLayout);
int attrCount = attrArray.getIndexCount();
for (int i = 0; i < attrCount; i++) {
int attrId = attrArray.getIndex(i);
switch (attrId) {
case R.styleable.AutoLineFeedLayout_horizontalSpacing:{
float dimen = attrArray.getDimension(attrId, 0);
horizontalSpace = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_verticalSpacing:{
float dimen = attrArray.getDimension(attrId, 0);
verticalSpace = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_paddingBottom:{
float dimen = attrArray.getDimension(attrId, 0);
paddingBottom = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_paddingLeft:{
float dimen = attrArray.getDimension(attrId, 0);
paddingLeft = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_paddingRight:{
float dimen = attrArray.getDimension(attrId, 0);
paddingRight = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_paddingTop:{
float dimen = attrArray.getDimension(attrId, 0);
paddingTop = (int) dimen;
}
break;
case R.styleable.AutoLineFeedLayout_debug:{ }
break; default:
break;
} } listX = new ArrayList<Integer>();
listY = new ArrayList<Integer>();
}
}
2、有一部分自定义属性可供使用 attrs.xml
<declare-styleable name="AutoLineFeedLayout">
<attr name="debug" format="boolean"></attr> <attr name="paddingLeft" format="reference|dimension"/>
<attr name="paddingRight" format="reference|dimension"/>
<attr name="paddingTop" format="reference|dimension"/>
<attr name="paddingBottom" format="reference|dimension"/> <attr name="verticalSpacing" format="reference|dimension"/>
<attr name="horizontalSpacing" format="reference|dimension"/>
</declare-styleable>
3、在布局文件中和普通ViewGroup使用相同
4、在Activity中动态添加View或者ViewGroup
for (int i = 0;i < myData.getList().length;i++){
View child = View.inflate(ZhuanTiActivity.this,R.layout.item_mygridview_layout,null);
TextView textView = (TextView) child.findViewById(R.id.tv_title_item);
textView.setText(myData.getList()[i].getName());
textView.setTextColor(Color.argb(255, colorR, colorG, colorB));
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("aaa",textView.getText());
}
});
custom_index_zhuanTiActivity.addView(child);
}