Android 自定义View（inflate()模式）_android自定义view inflate

1.创建LayoutInflater实例

有两种方式
1.

LayoutInflater layoutInflater= LayoutInflater.from(MainActivity.this);
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LayoutInflater layoutInflater= (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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2.在activity_main中创建父布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/rl_content"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
</RelativeLayout>
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3.创建button子布局

<?xml version="1.0" encoding="utf-8"?>
    <Button xmlns:android="http://schemas.android.com/apk/res/android"
        android:text="Button"
        android:layout_width="300dp"
        android:layout_height="wrap_content">
    </Button>
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4.给子布局添加到父布局中

package yuexia.com.customview;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RelativeLayout;

public class MainActivity extends AppCompatActivity {

    private RelativeLayout rl_content;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        rl_content = (RelativeLayout) this.findViewById(R.id.rl_content);
        LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
        LayoutInflater layoutInflater= (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        /*
        * 子元素属性的实现的两种方式
        * 1.root添加父元素
        * 2.给子元素添加布局
        * */
        View view=layoutInflater.inflate(R.layout.button,rl_content,true);
//        rl_content.addView(view);
        /*
        * 关于inflate的使用
        * 1.inflate的方法中root和attachToRoot分别不为空和true的时候就会添加view不需要再addView()
        * 2.添加merge时root和attachToRoot分别必须不为空和必须为true,所以也就用不到addView()
        * */
    }
}

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5.具体不太清楚的可以看看这位大佬的

https://blog.csdn.net/vv_bug/article/details/52600758