Android仿微信菜单(Menu)攻略
1. 简介
本攻略旨在介绍如何使用C#和Java分别实现Android仿微信菜单。该菜单在Android应用开发领域中较为常见,本攻略将从以下几个方面进行讲解:
- 什么是Android仿微信菜单?
- C#实现Android仿微信菜单的步骤及示例
- Java实现Android仿微信菜单的步骤及示例
2. Android仿微信菜单
Android仿微信菜单是一款具有向上和向下两个方向菜单滑出动画效果的菜单。它可以用于Android应用的菜单设计,增加应用的美观性,并且有时它会被用作Android应用中一些特效的配合。
3. C#实现Android仿微信菜单
3.1 步骤
C#实现Android仿微信菜单需要如下步骤:
- 添加“VerticalLinearLayout”类,该类为自定义线性布局。
```csharp
public class VerticalLinearLayout : LinearLayout
{
public VerticalLinearLayout(Context context) :
base(context)
{
}
public VerticalLinearLayout(Context context, IAttributeSet attrs) :
base(context, attrs)
{
}
public VerticalLinearLayout(Context context, IAttributeSet attrs, int defStyleAttr) :
base(context, attrs, defStyleAttr)
{
}
public VerticalLinearLayout(Context context, IAttributeSet attrs, int defStyleAttr, int defStyleRes) :
base(context, attrs, defStyleAttr, defStyleRes)
{
}
protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int childCount = ChildCount;
int maxWidth = MeasureSpec.GetSize(widthMeasureSpec);
int totalHeight = 0;
int verticalSpacing = 20; // 设置垂直间距
for (int i = 0; i < childCount; i++)
{
View child = GetChildAt(i);
// 计算View的宽高
int childWidthSpec = MeasureSpec.MakeMeasureSpec(maxWidth, MeasureSpecMode.AtMost);
int childHeightSpec = MeasureSpec.MakeMeasureSpec(0, MeasureSpecMode.Unspecified);
child.Measure(childWidthSpec, childHeightSpec);
totalHeight += child.MeasuredHeight + verticalSpacing;
}
SetMeasuredDimension(maxWidth, totalHeight);
}
}
```
- 添加“SlidingDrawerLayout”类,该类为自定义滑动抽屉式布局。
```csharp
public class SlidingDrawerLayout : VerticalLinearLayout
{
public SlidingDrawerLayout(Context context) :
base(context)
{
}
public SlidingDrawerLayout(Context context, IAttributeSet attrs) :
base(context, attrs)
{
}
public SlidingDrawerLayout(Context context, IAttributeSet attrs, int defStyleAttr) :
base(context, attrs, defStyleAttr)
{
}
public SlidingDrawerLayout(Context context, IAttributeSet attrs, int defStyleAttr, int defStyleRes) :
base(context, attrs, defStyleAttr, defStyleRes)
{
}
public void AnimateDrawer(bool slideUp)
{
if (slideUp)
{
// 打开菜单时的动画效果
Animate().TranslationY(-Height + ChildAt(0).Height).SetInterpolator(new DecelerateInterpolator(2)).WithLayer();
}
else
{
// 关闭菜单时的动画效果
Animate().TranslationY(0).SetInterpolator(new AccelerateInterpolator(2)).WithLayer();
}
}
}
```
在该类中,“AnimateDrawer”方法用于添加打开菜单和关闭菜单时的动画效果。
- 在布局文件中添加界面元素:一个“EditText”和一个“SlidingDrawerLayout”。
```xml
<EditText
android:id="@+id/search_edittext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Search" />
<com.example.myapp.SlidingDrawerLayout
android:id="@+id/sliding_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#375E97"
android:drawableLeft="@drawable/ic_launcher_background"
android:text="Menu Item 1" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FB6542"
android:drawableLeft="@drawable/ic_launcher_background"
android:text="Menu Item 2" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFBB00"
android:drawableLeft="@drawable/ic_launcher_background"
android:text="Menu Item 3" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3F681C"
android:drawableLeft="@drawable/ic_launcher_background"
android:text="Menu Item 4" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#D63826"
android:drawableLeft="@drawable/ic_launcher_background"
android:text="Menu Item 5" />
</com.example.myapp.SlidingDrawerLayout>
```
- 在MainActivity.cs类中,注册“EditText”的文本变更事件,并在事件处理程序中获取“SlidingDrawerLayout”对象,然后调用“AnimateDrawer”方法来打开或关闭菜单。
```csharp
public class MainActivity : AppCompatActivity
{
private EditText _searchEditText;
private SlidingDrawerLayout _slidingDrawerLayout;
private bool _isOpened = false;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.activity_main);
_searchEditText = FindViewById<EditText>(Resource.Id.search_edittext);
_slidingDrawerLayout = FindViewById<SlidingDrawerLayout>(Resource.Id.sliding_layout);
_searchEditText.TextChanged += SearchEditText_TextChanged;
}
private void SearchEditText_TextChanged(object sender, Android.Text.TextChangedEventArgs e)
{
string queryString = e.Text.ToString();
if (string.IsNullOrEmpty(queryString))
{
// 关闭菜单
_slidingDrawerLayout.AnimateDrawer(false);
_isOpened = false;
}
else
{
// 打开菜单
if (!_isOpened)
{
_slidingDrawerLayout.AnimateDrawer(true);
_isOpened = true;
}
}
}
}
```
3.2 示例
下面是一个C#实现Android仿微信菜单的示例视频:
4. Java实现Android仿微信菜单
4.1 步骤
Java实现Android仿微信菜单需要如下步骤:
- 在布局文件中添加界面元素:一个“EditText”和一个“SlidingDrawer”。
```xml
<EditText
android:id="@+id/search_edittext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Search" />
<SlidingDrawer
android:id="@+id/sliding_drawer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:content="@+id/menu_list"
android:handle="@+id/handle">
<ImageView
android:id="@+id/handle"
android:layout_width="match_parent"
android:layout_height="64dp"
android:src="@drawable/ic_launcher" />
<ListView
android:id="@+id/menu_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#fff"
android:dividerHeight="1dp" />
</SlidingDrawer>
```
- 在activity_main.xml布局中,为ListView添加菜单项。
```xml
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#375E97"
android:drawableLeft="@drawable/ic_launcher_background"
android:padding="16dp"
android:text="Menu Item 1" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FB6542"
android:drawableLeft="@drawable/ic_launcher_background"
android:padding="16dp"
android:text="Menu Item 2" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFBB00"
android:drawableLeft="@drawable/ic_launcher_background"
android:padding="16dp"
android:text="Menu Item 3" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#3F681C"
android:drawableLeft="@drawable/ic_launcher_background"
android:padding="16dp"
android:text="Menu Item 4" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#D63826"
android:drawableLeft="@drawable/ic_launcher_background"
android:padding="16dp"
android:text="Menu Item 5" />
```
- 在MainActivity.java类中,获取“SlidingDrawer”对象,给EditText添加监听事件,并在事件处理程序中调用SlidingDrawer对象的open方法或close方法。
```java
public class MainActivity extends AppCompatActivity {
EditText _searchEditText;
SlidingDrawer _slidingDrawer;
boolean _isOpened = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
_searchEditText = findViewById(R.id.search_edittext);
_slidingDrawer = findViewById(R.id.sliding_drawer);
_searchEditText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
String queryString = s.toString();
if (TextUtils.isEmpty(queryString)) {
if (_isOpened) {
_slidingDrawer.animateClose();
_isOpened = false;
}
} else {
if (!_isOpened) {
_slidingDrawer.animateOpen();
_isOpened = true;
}
}
}
@Override
public void afterTextChanged(Editable s) {
}
});
}
}
```
4.2 示例
下面是一个Java实现Android仿微信菜单的示例视频:
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