"为什么android的checkbox这么慢？"

Question

Today, I used an Android machine with poor performance.今天，我用了一台性能很差的安卓机器。 I found the checkbox loading is very slow.我发现复选框加载非常慢。 For example:例如：

activity_main.xml activity_main.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http:\/\/schemas.android.com\/apk\/res\/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <CheckBox android:layout_width="wrap_content" android:layout_height="wrap_content" \/> <\/LinearLayout><\/code><\/pre> MainActivity.java MainActivity.java public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); long t1 = System.currentTimeMillis(); setContentView(R.layout.activity_main); System.out.println("main cost: " + (System.currentTimeMillis() - t1)); } }<\/code><\/pre> There is only one Checkbox in the page, this will cost 200ms.页面中只有一个复选框，这将花费 200 毫秒。 If there are 3 or 5 checkbox in activity_main.xml, will cost 1s.如果 activity_main.xml 中有 3 或 5 个复选框，将花费 1s。 What happend?发生了什么事？
 I compared Switch to Checkbox.我将 Switch 与 Checkbox 进行了比较。 Obviously Switch is very very better than Checkbox.显然 Switch 比 Checkbox 好得多。 If i want to keep to use Checkbox, what should i do?如果我想继续使用复选框，我该怎么办？
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Answer 1

Why does it happen ?为什么会这样？<\/h2>
This is happening because the `Checkbox<\/code> class is very complicated(too much code 😠).``发生这种情况是因为Checkbox<\/code>类非常复杂（代码太多😠）。`

What is the solution ?解决办法是什么？<\/h2>


   
      You can create a custom layout.您可以创建自定义布局。<\/li>
  You can use a library.您可以使用库。<\/li><\/ol> How to implement ?如何实施？<\/h2> 
           1.Custom layout 1.自定义布局<\/h3> 
           
           First create a LinearLayout<\/code> with horizontal<\/code> orientation.首先创建一个horizontal<\/code>方向的LinearLayout<\/code> 。<\/li> 
            Add an ImageView<\/code> and a TextView<\/code> in the xml.在 xml 中添加一个ImageView<\/code>和一个TextView<\/code> 。<\/li> 
            Code reference代码参考<\/li><\/ul><LinearLayout android:id="@+id\/checkbox" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:padding="7dp"> <ImageView android:id="@+id\/checkImageView" android:layout_width="30dp" android:layout_height="30dp" android:src="@drawable\/checked"\/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="This is the text for checkbox." android:layout_gravity="center_vertical" android:layout_marginStart="15dp"\/> <\/LinearLayout><\/code><\/pre> 
                     
                      Now the code for it to work.现在让它工作的代码。<\/li><\/ul> In your class add this在你的课堂上添加这个
boolean isChecked = true<\/code><\/pre> Now it will function like this现在它将像这样运行
LinearLayout checkBox = findViewById( R.id.checkbox ); ImageView checkBoxImage = findViewById( R.id.checkImageView ); checkBox.setOnClickListener( v -> { final Bitmap bmap = ((BitmapDrawable)checkBoxImage.getDrawable()).getBitmap(); Drawable myDrawable = getResources().getDrawable(R.drawable.checked); final Bitmap myLogo = ((BitmapDrawable) myDrawable).getBitmap(); if (bmap.sameAs(myLogo)){ \/\/it is checked isChecked = false; checkBoxImage.setImageResource( R.drawable.unchecked ); }else { isChecked = true; checkBoxImage.setImageResource( R.drawable.checked ); } } );<\/code><\/pre> 
                             2.Using a library 2.使用图书馆<\/h3> 
                              
                              Use this<\/a> library.使用这个<\/a>库。 <\/li><\/ul>
 
                                 
                                  Sample usage示例使用<\/blockquote>
                                  
                                 setChecked(boolean checked); \/\/by default, it's wthout animation setChecked(boolean checked, boolean animate); \/\/pass true to animate<\/code><\/pre> protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_sample); final CustomCheckBox scb = (CustomCheckBox) findViewById(R.id.scb); scb.setOnCheckedChangeListener(new CustomCheckBox.OnCheckedChangeListener() { @Override public void onCheckedChanged(CustomCheckBox checkBox, boolean isChecked) { Log.d("CustomCheckBox", String.valueOf(isChecked)); } }); }<\/code><\/pre> Attrs属性<\/h3> 
                                         
                                          
                                           
                                            
                                            Attr属性<\/th> 
                                            Type类型<\/th> 
                                            Description描述<\/th><\/tr><\/thead> 
                                            
                                           
                                           
                                            
                                            duration期间<\/td> 
                                            integer整数<\/td> 
                                            Animation Duration动画时长<\/td><\/tr> 
                                            
                                            
                                            stroke_width行程宽度<\/td> 
                                            dimension方面<\/td> 
                                            The border width when unchecked未选中时的边框宽度<\/td><\/tr> 
                                            
                                            
                                            color_tick color_tick<\/td> 
                                             color颜色<\/td> 
                                            Tick color (visible only when checked)勾选颜色（仅在选中时可见）<\/td><\/tr> 
                                            
                                            
                                             color_checked color_checked<\/td> 
                                             color颜色<\/td> 
                                            Fill color when selected选中时填充颜色<\/td><\/tr> 
                                            
                                            
                                            color_unchecked color_unchecked<\/td> 
                                             color颜色<\/td> 
                                            Fill color when unchecked未选中时填充颜色<\/td><\/tr> 
                                            
                                            
                                            color_unchecked_stroke color_unchecked_stroke<\/td> 
                                             color颜色<\/td> 
                                            Border color when unchecked未选中时的边框颜色<\/td><\/tr><\/tbody><\/table>References参考<\/h2> 
                                              
Github<\/a> Github<\/a>
"

Attr属性<\/th>	Type类型<\/th>	Description描述<\/th><\/tr><\/thead>
duration期间<\/td>	integer整数<\/td>	Animation Duration动画时长<\/td><\/tr>
stroke_width行程宽度<\/td>	dimension方面<\/td>	The border width when unchecked未选中时的边框宽度<\/td><\/tr>
color_tick color_tick<\/td>	color颜色<\/td>	Tick color (visible only when checked)勾选颜色（仅在选中时可见）<\/td><\/tr>
color_checked color_checked<\/td>	color颜色<\/td>	Fill color when selected选中时填充颜色<\/td><\/tr>
color_unchecked color_unchecked<\/td>	color颜色<\/td>	Fill color when unchecked未选中时填充颜色<\/td><\/tr>
color_unchecked_stroke color_unchecked_stroke<\/td>	color颜色<\/td>	Border color when unchecked未选中时的边框颜色<\/td><\/tr><\/tbody><\/table> References参考<\/h2> Github<\/a> Github<\/a> "

"为什么android的checkbox这么慢？"

问题描述

1 个解决方案

解决方案1
1 2022-01-26 15:44:53

Why does it happen ?为什么会这样？<\/h2>
This is happening because the `Checkbox<\/code> class is very complicated(too much code 😠).``发生这种情况是因为Checkbox<\/code>类非常复杂（代码太多😠）。`

How to implement ?如何实施？<\/h2>

References参考<\/h2>
Github<\/a> Github<\/a>
"

"为什么android的checkbox这么慢？"

问题描述

1 个解决方案

解决方案1 1 2022-01-26 15:44:53

Why does it happen ?为什么会这样？<\/h2> This is happening because the Checkbox<\/code> class is very complicated(too much code 😠).发生这种情况是因为Checkbox<\/code>类非常复杂（代码太多😠）。

How to implement ?如何实施？<\/h2>

References参考<\/h2> Github<\/a> Github<\/a>"

解决方案1
1 2022-01-26 15:44:53

Why does it happen ?为什么会这样？<\/h2>
This is happening because the `Checkbox<\/code> class is very complicated(too much code 😠).``发生这种情况是因为Checkbox<\/code>类非常复杂（代码太多😠）。`

References参考<\/h2>
Github<\/a> Github<\/a>
"