英文:
Add event OnClickListener in dynamically Linear layout in android
问题
如何在每个LinearLayout布局上设置点击事件:
我想要显示一个包含5个元素的列表,如下所示(不要使用RecycleView、ListView):
但是有一个问题,就是如何捕获每个项目的点击事件,以及如何知道我点击了哪个项目,请帮助我。
这是我的代码:
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:id="@+id/layoutRoot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>
item_content.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp">
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:src="@drawable/ic_launcher_background"
/>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:textSize="18sp"
android:text="string name"
/>
</LinearLayout>
以及Java代码:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
}
public void addView() {
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++) {
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
view.setOnClickListener(this);
}
}
@Override
public void onClick(View view) {
// 在这里处理点击事件
}
}
英文:
How to set the click event on each layout is in LinearLayout:
I want to display a list of 5 elements as shown below (Do not use RecycleView, ListView):
But there was a problem catching the click event for each item, and how to know which item I clicked on, please help me.
This my code:
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<LinearLayout
android:id="@+id/layoutRoot"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
</LinearLayout>
</LinearLayout>
item_content.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="10dp"
>
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:src="@drawable/ic_launcher_background"
/>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="12dp"
android:textSize="18sp"
android:text="string name"
/>
</LinearLayout>
And Java Code:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
}
public void addView() {
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++) {
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
}
// viewGroup.setOnClickListener(this);
}
@Override
public void onClick(View view) {
}
}
答案1
得分: 4
在每个循环中的view
(item_content.xml
)中,您可以添加一个带有位置的tag
。然后在onClick
中,您可以获取该标记并解析为Integer
。
示例:
public class MainActivity extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
}
public void addView()
{
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++)
{
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
view.setTag(Integer.toString(i));
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
view.setOnClickListener(clickInLinearLayout()); //为每个item_content设置点击
}
}
private View.OnClickListener clickInLinearLayout()
{
return new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Integer position = Integer.parseInt(v.getTag().toString());
System.out.println("Clicked item at position: " + position);
}
};
}
}
或者第二个类似的选项,使用变量而不是函数:
public class MainActivity extends AppCompatActivity
{
private View.OnClickListener clickInLinearLayout;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
clickInLinearLayout = new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Integer position = Integer.parseInt(v.getTag().toString());
System.out.println("Clicked item at position: " + position);
}
};
addView();
}
public void addView()
{
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++)
{
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
view.setTag(Integer.toString(i));
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
view.setOnClickListener(clickInLinearLayout); //为每个item_content设置点击
}
}
}
英文:
For each view
in a loop (item_content.xml
) You can add tag
with the position. Then in onClick
You can get that tag and parse to Integer
.
Example:
public class MainActivity extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addView();
}
public void addView()
{
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++)
{
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
view.setTag(Integer.toString(i));
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
view.setOnClickListener(clickInLinearLayout()); //setting click to each item_content
}
}
private View.OnClickListener clickInLinearLayout()
{
return new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Integer position = Integer.parseInt(v.getTag().toString());
System.out.println("Clicked item at position: " + position);
}
};
}
}
<hr>
Or the second similar option with variable not function:
public class MainActivity extends AppCompatActivity
{
private View.OnClickListener clickInLinearLayout;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
clickInLinearLayout = new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Integer position = Integer.parseInt(v.getTag().toString());
System.out.println("Clicked item at position: " + position);
}
};
addView();
}
public void addView()
{
ViewGroup viewGroup = findViewById(R.id.layoutRoot);
for (int i = 0; i <= 5; i++)
{
LayoutInflater inflater = (LayoutInflater) getApplicationContext().
getSystemService(getApplicationContext().LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.item_content, null);
view.setTag(Integer.toString(i));
TextView textView = view.findViewById(R.id.text);
textView.setText("Name " + i);
viewGroup.addView(view);
view.setOnClickListener(clickInLinearLayout); //setting click to each item_content
}
}
}
答案2
得分: 1
为视图添加标签(setTag()
)可以是一个数字,比如一个ID(例如:1、2、3等,甚至是您在for循环中使用的i
),然后当您单击时,检查标签(getTag()
),如下所示:
@Override
public void onClick(View view) {
switch(view.getTag()){
case 1:
// ...
}
}
或者只需使用if else语句。
英文:
Add a tag to the view (setTag()
) can be a number like an id(ex: 1,2,3,... or even the i
that you are using in for loop), to each of them then when you click check the tag(getTag()
) like:
@Override
public void onClick(View view) {
switch(view.getTag()){
case 1:
....
}
or just use a if else statement
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