0
我創建了一個DashbordLayout來查看按鈕列表。我需要在我的佈局中設置滾動查看器。我的佈局如下所示：如何在佈局中設置滾動視圖
<com.psybo.shahi.localareaportal.DashboardLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:background="#f8f9fe">
<Button
android:id="@+id/btn_news_feed"
style="@style/DashboardButton"
android:drawableTop="@drawable/place"
android:text="@string/my_place" />
<Button
android:id="@+id/btn_friends"
style="@style/DashboardButton"
android:drawableTop="@drawable/education"
android:text="@string/education" />
<!-- Messages Button -->
<Button
android:id="@+id/btn_messages"
style="@style/DashboardButton"
android:drawableTop="@drawable/bus"
android:text="@string/bus_time" />
<Button
android:id="@+id/btn_places"
style="@style/DashboardButton"
android:drawableTop="@drawable/train"
android:text="@string/train_time" />
<Button
android:id="@+id/btn_events"
style="@style/DashboardButton"
android:drawableTop="@drawable/auto"
android:text="@string/auto" />
<Button
android:id="@+id/btn_photos"
style="@style/DashboardButton"
android:drawableTop="@drawable/taxi"
android:text="@string/taxi" />
<Button
android:id="@+id/btn_goods"
style="@style/DashboardButton"
android:drawableTop="@drawable/goods"
android:text="@string/goods" />
<Button
android:id="@+id/btn_business"
style="@style/DashboardButton"
android:drawableTop="@drawable/business"
android:text="@string/business" />
<Button
android:id="@+id/btn_hospital"
style="@style/DashboardButton"
android:drawableTop="@drawable/hospital"
android:text="@string/hospital" />
<Button
android:id="@+id/btn_bleed"
style="@style/DashboardButton"
android:drawableTop="@drawable/blood"
android:text="@string/bleed_bank" />
<Button
android:id="@+id/btn_pani"
style="@style/DashboardButton"
android:drawableTop="@drawable/pani"
android:text="@string/pani" />
<Button
android:id="@+id/btn_emergency"
style="@style/DashboardButton"
android:drawableTop="@drawable/emergency"
android:text="@string/emergency" />
<Button
android:id="@+id/btn_feedback"
style="@style/DashboardButton"
android:drawableTop="@drawable/feedback"
android:text="@string/feedback" />
<Button
android:id="@+id/btn_we"
style="@style/DashboardButton"
android:drawableTop="@drawable/we"
android:text="@string/we" />
這種佈局與下面的類給出波紋管創建。
package com.psybo.shahi.localareaportal;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
public class DashboardLayout extends ViewGroup {
private static final int UNEVEN_GRID_PENALTY_MULTIPLIER = 10;
private int mMaxChildWidth = 0;
private int mMaxChildHeight = 0;
public DashboardLayout(Context context) {
super(context, null);
}
public DashboardLayout(Context context, AttributeSet attrs) {
super(context, attrs, 0);
}
public DashboardLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
mMaxChildWidth = 0;
mMaxChildHeight = 0;
// Measure once to find the maximum child size.
int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST);
int childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST);
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
mMaxChildWidth = Math.max(mMaxChildWidth, child.getMeasuredWidth());
mMaxChildHeight = Math.max(mMaxChildHeight, child.getMeasuredHeight());
}
childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
mMaxChildWidth, MeasureSpec.EXACTLY);
childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
mMaxChildHeight, MeasureSpec.EXACTLY);
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
setMeasuredDimension(
resolveSize(mMaxChildWidth, widthMeasureSpec),
resolveSize(mMaxChildHeight, heightMeasureSpec));
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
int width = r - l;
int height = b - t;
final int count = getChildCount();
// Calculate the number of visible children.
int visibleCount = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
++visibleCount;
}
if (visibleCount == 0) {
return;
}
int bestSpaceDifference = Integer.MAX_VALUE;
int spaceDifference;
// Horizontal and vertical space between items
int hSpace = 0;
int vSpace = 0;
int cols = 1;
int rows;
while (true) {
rows = (visibleCount - 1)/cols + 1;
hSpace = ((width - mMaxChildWidth * cols)/(cols + 1));
vSpace = ((height - mMaxChildHeight * rows)/(rows + 1));
spaceDifference = Math.abs(vSpace - hSpace);
if (rows * cols != visibleCount) {
spaceDifference *= UNEVEN_GRID_PENALTY_MULTIPLIER;
}
if (spaceDifference < bestSpaceDifference) {
// Found a better whitespace squareness/ratio
bestSpaceDifference = spaceDifference;
if (rows == 1) {
break;
}
} else {
// This is a worse whitespace ratio, use the previous value of cols and exit.
--cols;
rows = (visibleCount - 1)/cols + 1;
hSpace = ((width - mMaxChildWidth * cols)/(cols + 1));
vSpace = ((height - mMaxChildHeight * rows)/(rows + 1));
break;
}
++cols;
}
hSpace = Math.max(0, hSpace);
vSpace = Math.max(0, vSpace);
// Re-use width/height variables to be child width/height.
width = (width - hSpace * (cols + 1))/cols;
height = (height - vSpace * (rows + 1))/rows;
int left, top;
int col, row;
int visibleIndex = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() == GONE) {
continue;
}
row = visibleIndex/cols;
col = visibleIndex % cols;
left = hSpace * (col + 1) + width * col;
top = vSpace * (row + 1) + height * row;
child.layout(left, top,
(hSpace == 0 && col == cols - 1) ? r : (left + width),
(vSpace == 0 && row == rows - 1) ? b : (top + height));
++visibleIndex;
}
}
}
我給出了一個ScrollViewer中在開始layout.But的佈局排列變化像下面的圖像
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
------- here DashbordLayout ------
</ScrollView>
我需要知道滾動在我的排列是如何設定的觀衆。
嘗試刪除安卓：從com.psybo.shahi.localareaportal.DashboardLayout layout_weight = 「1」 – ajantha