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LRH1993LRH1993
committed
margin测量
1 parent 1d1232e commit 3fdac7e

2 files changed

Lines changed: 67 additions & 31 deletions

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

Lines changed: 60 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -5,20 +5,17 @@
55
import android.graphics.Canvas;
66
import android.graphics.Paint;
77
import android.graphics.drawable.Drawable;
8-
import android.support.v4.view.GestureDetectorCompat;
98
import android.util.AttributeSet;
109
import android.view.View;
10+
import android.view.ViewGroup;
1111
import android.widget.LinearLayout;
1212
import java.util.ArrayList;
13-
import java.util.HashMap;
1413
import java.util.List;
15-
import java.util.Map;
16-
import java.util.Set;
1714

1815
/**
1916
*自定义LinearLayout，支持自动换行，指定行数,实现流式布局
2017
*/
21-
public class AutoFlowLayout <T> extends LinearLayout {
18+
public class AutoFlowLayout <T> extends ViewGroup {
2219
/**
2320
* 存储所有的View，按行记录
2421
*/
@@ -150,11 +147,9 @@ private void init(Context context, AttributeSet attrs) {
150147
mIsGridMode = true;
151148
}
152149
ta.recycle();
153-
setOrientation(HORIZONTAL);
154150
}
155151
@Override
156152
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
157-
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
158153
if (mIsGridMode) {
159154
setGridMeasure(widthMeasureSpec,heightMeasureSpec);
160155
} else {
@@ -197,12 +192,12 @@ private void setGridMeasure(int widthMeasureSpec, int heightMeasureSpec) {
197192
final View child = getChildAt(i * mColumnNumbers + j);
198193
if (child != null) {
199194
if (child.getVisibility() != GONE) {
200-
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
201-
final int childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec, 0, lp.width);
202-
final int childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec, 0, lp.height);
203-
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
204-
maxWidth +=child.getMeasuredWidth();
205-
maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight());
195+
measureChild(child,widthMeasureSpec,heightMeasureSpec);
196+
// 得到child的lp
197+
FlowLayoutParams lp = (FlowLayoutParams) child
198+
.getLayoutParams();
199+
maxWidth +=child.getMeasuredWidth()+lp.leftMargin+lp.rightMargin;
200+
maxChildHeight = Math.max(maxChildHeight, child.getMeasuredHeight()+lp.topMargin+lp.bottomMargin);
206201
}
207202
}
208203
}
@@ -258,8 +253,8 @@ private void setFlowMeasure(int widthMeasureSpec, int heightMeasureSpec) {
258253
// 测量每一个child的宽和高
259254
measureChild(child, widthMeasureSpec, heightMeasureSpec);
260255
// 得到child的lp
261-
MarginLayoutParams lp = (MarginLayoutParams) child
262-
.getLayoutParams();
256+
FlowLayoutParams lp = (FlowLayoutParams) child
257+
.getLayoutParams();
263258
// 当前子空间实际占据的宽度
264259
int childWidth = child.getMeasuredWidth() + lp.leftMargin
265260
+ lp.rightMargin;
@@ -303,7 +298,6 @@ private void setFlowMeasure(int widthMeasureSpec, int heightMeasureSpec) {
303298
: height);
304299
}
305300

306-
307301
@Override
308302
protected void onLayout(boolean changed, int l, int t, int r, int b) {
309303
if (mIsGridMode) {
@@ -320,18 +314,21 @@ private void setGridLayout() {
320314
mCurrentItemIndex = -1;
321315
int sizeWidth = getWidth();
322316
int sizeHeight = getHeight();
323-
//子View的平均宽高
324-
int childAvWidth = (int) ((sizeWidth - getPaddingLeft() - getPaddingRight() - mHorizontalSpace * (mColumnNumbers-1))/mColumnNumbers);
325-
int childAvHeight = (int) ((sizeHeight - getPaddingTop() - getPaddingBottom() - mVerticalSpace * (mRowNumbers-1))/mRowNumbers);
317+
//子View的平均宽高 默认所有View宽高一致
318+
View tempChild = getChildAt(0);
319+
FlowLayoutParams lp = (FlowLayoutParams) tempChild
320+
.getLayoutParams();
321+
int childAvWidth = (int) ((sizeWidth - getPaddingLeft() - getPaddingRight() - mHorizontalSpace * (mColumnNumbers-1))/mColumnNumbers)-lp.leftMargin-lp.rightMargin;
322+
int childAvHeight = (int) ((sizeHeight - getPaddingTop() - getPaddingBottom() - mVerticalSpace * (mRowNumbers-1))/mRowNumbers)-lp.topMargin-lp.bottomMargin;
326323
for (int i = 0; i < mRowNumbers; i++) {
327324
for (int j = 0; j < mColumnNumbers; j++) {
328325
final View child = getChildAt(i * mColumnNumbers + j);
329326
if (child != null) {
330327
mCurrentItemIndex++;
331328
if (child.getVisibility() != View.GONE) {
332329
setChildClickOperation(child, -1);
333-
int childLeft = (int) (getPaddingLeft() + j * (childAvWidth + mHorizontalSpace));
334-
int childTop = (int) (getPaddingTop() + i * (childAvHeight + mVerticalSpace));
330+
int childLeft = (int) (getPaddingLeft() + j * (childAvWidth + mHorizontalSpace))+j * (lp.leftMargin + lp.rightMargin) + lp.leftMargin;
331+
int childTop = (int) (getPaddingTop() + i * (childAvHeight + mVerticalSpace)) + i * (lp.topMargin + lp.bottomMargin) + lp.topMargin;
335332
child.layout(childLeft, childTop, childLeft + childAvWidth, childAvHeight +childTop);
336333
}
337334
}
@@ -359,7 +356,7 @@ private void setFlowLayout() {
359356
// 遍历所有的孩子
360357
for (int i = 0; i < cCount; i++) {
361358
View child = getChildAt(i);
362-
MarginLayoutParams lp = (MarginLayoutParams) child
359+
FlowLayoutParams lp = (FlowLayoutParams) child
363360
.getLayoutParams();
364361
int childWidth = child.getMeasuredWidth();
365362
int childHeight = child.getMeasuredHeight();
@@ -420,7 +417,7 @@ private void setFlowLayout() {
420417
continue;
421418
}
422419
setChildClickOperation(child, -1);
423-
MarginLayoutParams lp = (MarginLayoutParams) child
420+
FlowLayoutParams lp = (FlowLayoutParams) child
424421
.getLayoutParams();
425422

426423
//计算childView的left,top,right,bottom
@@ -435,9 +432,48 @@ private void setFlowLayout() {
435432
left += child.getMeasuredWidth() + lp.rightMargin
436433
+ lp.leftMargin;
437434
}
435+
FlowLayoutParams lp = (FlowLayoutParams) getChildAt(0)
436+
.getLayoutParams();
438437
left = getPaddingLeft();
439-
top += lineHeight;
438+
top += lineHeight + lp.topMargin + lp.bottomMargin;
439+
}
440+
}
441+
public static class FlowLayoutParams extends MarginLayoutParams {
442+
443+
public FlowLayoutParams(Context c, AttributeSet attrs) {
444+
super(c, attrs);
440445
}
446+
447+
public FlowLayoutParams(int width, int height) {
448+
super(width, height);
449+
}
450+
451+
public FlowLayoutParams(ViewGroup.LayoutParams source) {
452+
super(source);
453+
}
454+
}
455+
456+
@Override
457+
public LayoutParams generateLayoutParams(AttributeSet attrs)
458+
{
459+
return new FlowLayoutParams(getContext(), attrs);
460+
}
461+
462+
@Override
463+
protected LayoutParams generateDefaultLayoutParams()
464+
{
465+
return new FlowLayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
466+
}
467+
468+
@Override
469+
protected LayoutParams generateLayoutParams(LayoutParams p)
470+
{
471+
return new FlowLayoutParams(p);
472+
}
473+
474+
@Override
475+
protected boolean checkLayoutParams(LayoutParams p) {
476+
return p instanceof FlowLayoutParams;
441477
}
442478

443479
/**

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

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -1,14 +1,15 @@
11
<?xml version="1.0" encoding="utf-8"?>
2-
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
2+
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
33
android:layout_width="wrap_content"
44
android:layout_height="wrap_content"
5-
android:paddingBottom="12dp"
6-
android:paddingTop="12dp"
7-
android:paddingLeft="8dp"
5+
android:layout_marginTop="12dp"
6+
android:layout_marginBottom="12dp"
7+
android:layout_marginLeft="8dp"
88
android:gravity="center"
9-
android:paddingRight="8dp"
9+
android:layout_marginRight="8dp"
1010
android:orientation="vertical">
1111
<TextView
12+
android:text="你好"
1213
android:id="@+id/tv_attr_tag"
1314
android:layout_width="wrap_content"
1415
android:layout_height="wrap_content"
@@ -19,7 +20,6 @@
1920
android:textSize="16sp"
2021
android:background="@drawable/bg_sub_tag"
2122
android:textColor="@color/btn_common_text">
22-
2323
</TextView>
2424
<ImageView
2525
android:layout_alignParentTop="true"
@@ -29,4 +29,4 @@
2929
android:layout_width="wrap_content"
3030
android:layout_height="wrap_content"/>
3131

32-
</FrameLayout>
32+
</RelativeLayout>

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