Android中自定义ViewGroup使每行组件数量不确定，并拿到选中数据（流式布局）
1先看效果图
2项目目录
3在定义控件FlowTagGroup
package android.zhh.com.myviewgroup;
/**
* Created by sky on 2017/3/10.
*/
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* 流布局
*/
public class FlowTagGroup extends ViewGroup {
public FlowTagGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public FlowTagGroup(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public FlowTagGroup(Context context) {
this(context, null);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
int modeHeight = MeasureSpec.getMode(heightMeasureSpec);
// wrap_content
int width = 0;
int height = 0;
// 记录每一行的宽度与高度
int lineWidth = 0;
int lineHeight = 0;
// 得到内部元素的个数
int cCount = getChildCount();
for (int i = 0; i < cCount; i++) {
View child = getChildAt(i);
// 测量子View的宽和高
measureChild(child, widthMeasureSpec, heightMeasureSpec);
// 得到LayoutParams
MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();
// 子View占据的宽度
int childWidth = child.getMeasuredWidth() + lp.leftMargin
+ lp.rightMargin;
// 子View占据的高度
int childHeight = child.getMeasuredHeight() + lp.topMargin
+ lp.bottomMargin;
// 换行
if (lineWidth + childWidth > sizeWidth - getPaddingLeft()
- getPaddingRight()) {
// 对比得到最大的宽度
width = Math.max(width, lineWidth);
// 重置lineWidth
lineWidth = childWidth;
// 记录行高
height += lineHeight;
lineHeight = childHeight;
} else
// 未换行
{
// 叠加行宽
lineWidth += childWidth;
// 得到当前行最大的高度
lineHeight = Math.max(lineHeight, childHeight);
}
// 最后一个控件
if (i == cCount - 1) {
width = Math.max(lineWidth, width);
height += lineHeight;
}
}
Log.e("TAG", "sizeWidth = " + sizeWidth);
Log.e("TAG", "sizeHeight = " + sizeHeight);
setMeasuredDimension(
//
modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width
+ getPaddingLeft() + getPaddingRight(),
modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height
+ getPaddingTop() + getPaddingBottom()//
);
}
/**
* 存储所有的View
*/
private List> mAllViews = new ArrayList>();
/**
* 每一行的高度
*/
private List mLineHeight = new ArrayList();
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
mAllViews.clear();
mLineHeight.clear();
// 当前ViewGroup的宽度
int width = getWidth();
int lineWidth = 0;
int lineHeight = 0;
List lineViews = new ArrayList();
int cCount = getChildCount();
for (int i = 0; i < cCount; i++) {
View child = getChildAt(i);
MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();
int childWidth = child.getMeasuredWidth();
int childHeight = child.getMeasuredHeight();
// 如果需要换行
if (childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width
- getPaddingLeft() - getPaddingRight()) {
// 记录LineHeight
mLineHeight.add(lineHeight);
// 记录当前行的Views
mAllViews.add(lineViews);
// 重置我们的行宽和行高
lineWidth = 0;
lineHeight = childHeight + lp.topMargin + lp.bottomMargin;
// 重置我们的View集合
lineViews = new ArrayList();
}
lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
lineHeight = Math.max(lineHeight, childHeight + lp.topMargin
+ lp.bottomMargin);
lineViews.add(child);
}// for end
// 处理最后一行
mLineHeight.add(lineHeight);
mAllViews.add(lineViews);
// 设置子View的位置
int left = getPaddingLeft();
int top = getPaddingTop();
// 行数
int lineNum = mAllViews.size();
for (int i = 0; i < lineNum; i++) {
// 当前行的所有的View
lineViews = mAllViews.get(i);
lineHeight = mLineHeight.get(i);
for (int j = 0; j < lineViews.size(); j++) {
View child = lineViews.get(j);
// 判断child的状态
if (child.getVisibility() == View.GONE) {
continue;
}
MarginLayoutParams lp = (MarginLayoutParams) child
.getLayoutParams();
int lc = left + lp.leftMargin;
int tc = top + lp.topMargin;
int rc = lc + child.getMeasuredWidth();
int bc = tc + child.getMeasuredHeight();
// 为子View进行布局
child.layout(lc, tc, rc, bc);
left += child.getMeasuredWidth() + lp.leftMargin
+ lp.rightMargin;
}
left = getPaddingLeft();
top += lineHeight;
}
}
/**
* 与当前ViewGroup对应的LayoutParams
*/
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MarginLayoutParams(getContext(), attrs);
}
}
4activity_main.xml文件中引用自定义控件
5MainActivity中使用
package android.zhh.com.myviewgroup;
import android.app.Activity;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
public class MainActivity extends Activity {
// 流布局
private FlowTagGroup ftgAttribute;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView(){
ftgAttribute = (FlowTagGroup)findViewById(R.id.ftgAttribute);
String mNames[] = {
"回复快块块快块块","专业专业专业专业专业",
"热情周到",
"及时解决","不专业",
"态度差",
"回复",
"态度好"
};
ViewGroup.MarginLayoutParams lp = new ViewGroup.MarginLayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
lp.leftMargin = 10;
lp.rightMargin = 10;
lp.topMargin = 10;
lp.bottomMargin = 10;
for(int i = 0; i < mNames.length; i ++) {
MyTextView myTextView= new MyTextView(this);
myTextView.setText(mNames[i]);
myTextView.setTextColor(Color.parseColor("#666666"));
myTextView.setBackgroundResource(R.drawable.bg_comment_attribute_off);
ftgAttribute.addView(myTextView, lp);
// 点击事件和拿到数据
myTextView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 选中状态isSelected=true
if(((MyTextView)v).isSelected){
Log.e("111","选中状态");
((MyTextView) v).setTextColor(Color.parseColor("#ffffff"));
((MyTextView)v).setBackgroundResource(R.drawable.bg_comment_attribute_on);
((MyTextView)v).isSelected=false;
}
// 不选中状态
else{
Log.e("111", "未选中状态");
((MyTextView) v).setTextColor(Color.parseColor("#666666"));
((MyTextView)v).setBackgroundResource(R.drawable.bg_comment_attribute_off);
((MyTextView)v).isSelected=true;
}
// 打印选中的数据
for(int i=0;i
6MyTextView文件（自定义TextView）
package android.zhh.com.myviewgroup;
import android.content.Context;
import android.widget.TextView;
/**
* Created by sky on 2017/3/10.
*/
public class MyTextView extends TextView {
// 默认不选中
public boolean isSelected=true;
public MyTextView(Context context) {
super(context);
}
}
7drawable目录下按钮点击后的背景bg_comment_attribute_on.xml
-
8drawable目录下按钮点击后的背景bg_comment_attribute_off.xml
-
源码下载：
http://download.csdn.net/download/zhaihaohao1/9776817