本文實(shí)例為大家分享了Android自定義控件ViewGroup實(shí)現(xiàn)標(biāo)簽云的具體代碼，供大家參考，具體內(nèi)容如下
實(shí)現(xiàn)的功能：
基本繪制流程：
構(gòu)造函數(shù)獲取自定義屬性
onMeasure()方法，測(cè)量子控件的大小
onLayout()方法，對(duì)子控件進(jìn)行布局
1、自定義屬性
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<resources> <declare-styleable name="TabsViewGroup"> <attr name="tabVerticalSpace" format="dimension" /> <attr name="tabHorizontalSpace" format="dimension" /> </declare-styleable></resources> |
2、構(gòu)造函數(shù)中獲取自定義屬性值
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public TabsViewGroup(Context context, AttributeSet attrs) { super(context, attrs); TypedArray attrArray = context.obtainStyledAttributes(attrs, R.styleable.TabsViewGroup); if (attrArray != null) { childHorizontalSpace = attrArray.getDimensionPixelSize(R.styleable.TabsViewGroup_tabHorizontalSpace, 0); childVerticalSpace = attrArray.getDimensionPixelSize(R.styleable.TabsViewGroup_tabHorizontalSpace, 0); attrArray.recycle(); } } |
3、onMeasure函數(shù)測(cè)量子控件大小，然后設(shè)置當(dāng)前控件大小
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@Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSize = MeasureSpec.getSize(widthMeasureSpec); int heightSize = MeasureSpec.getSize(heightMeasureSpec); int widthModel = MeasureSpec.getMode(widthMeasureSpec); int heightModel = MeasureSpec.getMode(heightMeasureSpec); //輸出寬度高度以及測(cè)量模式 Log.i(TAG, "sizeWidth :" + widthSize); switch (widthModel) { case MeasureSpec.AT_MOST: Log.i(TAG, "Width model AT_MOST"); break; case MeasureSpec.EXACTLY: Log.i(TAG, "Width model EXACTLY"); break; case MeasureSpec.UNSPECIFIED: Log.i(TAG, "Width model UNSPECIFIED"); break; } Log.i(TAG, "sizeHeight :" + heightSize); switch (heightModel) { case MeasureSpec.AT_MOST: Log.i(TAG, "Height model AT_MOST"); break; case MeasureSpec.EXACTLY: Log.i(TAG, "Height model EXACTLY"); break; case MeasureSpec.UNSPECIFIED: Log.i(TAG, "Height model UNSPECIFIED"); break; } //左右邊距 int left = getPaddingLeft(); int top = getPaddingTop(); //記錄每一行的寬度和高度 int lineWidth = 0; int lineHeight = 0; // 如果是warp_content情況下，記錄寬和高 int containerWidth = 0; int containerHeight = 0; // 遍歷每個(gè)子元素 for (int index = 0; index < getChildCount(); index++) { View child = getChildAt(index); if (child.getVisibility() == GONE) { continue; } measureChild(child, widthMeasureSpec, heightMeasureSpec); MarginLayoutParams params = (MarginLayoutParams) child.getLayoutParams(); int childWidth = child.getMeasuredWidth() + params.leftMargin + params.rightMargin + childHorizontalSpace; int childHeight = child.getMeasuredHeight() + params.topMargin + params.bottomMargin + childVerticalSpace; if (lineWidth + childWidth > widthSize - getPaddingRight() - getPaddingLeft()) { containerWidth = Math.max(lineWidth, childWidth); lineWidth = childWidth; containerHeight += lineHeight; lineHeight = childHeight; Rect rect = new Rect(left, containerHeight + top, left + childWidth - childHorizontalSpace, containerHeight + top + child.getMeasuredHeight()); child.setTag(rect); } else { Rect rect = new Rect(lineWidth + left, containerHeight + top, lineWidth + left + childWidth - childHorizontalSpace, containerHeight + top + child.getMeasuredHeight()); child.setTag(rect); lineWidth += childWidth; lineHeight = Math.max(lineHeight, childHeight); } } containerWidth = Math.max(containerWidth, lineWidth) + getPaddingLeft() + getPaddingRight(); containerHeight += lineHeight + getPaddingTop() + getPaddingBottom(); containerHeight -= childVerticalSpace; setMeasuredDimension(widthModel == MeasureSpec.EXACTLY ? widthSize : containerWidth, heightModel == MeasureSpec.EXACTLY ? heightSize : containerHeight);} |
4、onLayout函數(shù)對(duì)所有子控件重新布局
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@Override protected void onLayout(boolean changed, int l, int t, int r, int b) { int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View child = getChildAt(i); if (child.getVisibility() == GONE) { continue; } Rect location = (Rect) child.getTag(); child.layout(location.left, location.top, location.right, location.bottom); }} |
使用方法
1、布局問(wèn)自己中直接引用
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<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:owen="http://schemas.android.com/apk/res-auto" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffffff" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="10dp" android:textSize="16sp" android:text="國(guó)際足球"/> <View android:layout_width="wrap_content" android:layout_height="0.1dp" android:background="#e0e0e0"/> <com.ownchan.tabviewgroup.view.TabsViewGroup android:id="@+id/tabs_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="10dip" owen:tabHorizontalSpace="10dp" owen:tabVerticalSpace="10dp" /></LinearLayout> |
2、代碼添加標(biāo)簽
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@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { TabsViewGroup tabsViewGroup = (TabsViewGroup) findViewById(R.id.tabs_view); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); String[] tabs = new String[]{"世預(yù)賽歐洲區(qū)", "世預(yù)賽南美區(qū)", "五人世界杯", "意甲", "美國(guó)大聯(lián)盟", "烏超", "英冠", "國(guó)際冠軍杯", "巴西圣保羅州杯", "巴西杯"}; for (int i = 0; i < tabs.length; i++) { TextView textView = new TextView(this); textView.setText(tabs[i]); textView.setTextColor(Color.WHITE); textView.setBackgroundDrawable(getResources().getDrawable(R.drawable.tabs_bg)); textView.setGravity(Gravity.CENTER); textView.setPadding(10, 0, 10, 0); textView.setTextSize(16); tabsViewGroup.addView(textView, params); }} |
效果圖：
項(xiàng)目Github地址
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://blog.csdn.net/owenchan1987/article/details/59480006
