在 android 的动态线性布局中添加事件 OnClickListener

Question

如何设置每个布局的点击事件在LinearLayout中：

我想显示一个包含 5 个元素的列表，如下所示（不要使用 RecycleView、ListView）：

但是捕捉每个item的click事件有问题，如何知道我点击了哪个item，请帮帮我。

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>

和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);
        }
        // viewGroup.setOnClickListener(this);

    }

    @Override
    public void onClick(View view) {

    }
}

Answer 1

向视图添加标签 (setTag()) 可以是一个数字，例如 id（例如：1,2,3,... 甚至是您在其中使用的 i for循环），然后当你点击检查标签（getTag()）时，对他们每个人进行检查，如：

@Override
public void onClick(View view) {
     switch(view.getTag()){
     case 1:
       ....
}

或者只使用 if else 语句

Answer 2

对于循环中的每个 view (item_content.xml) 您可以添加 tag 与位置。然后在 onClick 中，您可以获得该标记并解析为 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()); //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);
            }
        };
    }
}

或变量无效的第二个类似选项：

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
        }
    }
}

在 android 的动态线性布局中添加事件 OnClickListener

Add event OnClickListener in dynamically Linear layout in android

java

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kotlin

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onclicklistener