Android中创建自定义控件

1.创建一个TitleLayout继承LinearLayout：　

//创建自定义控件
public class TitleLayout extends LinearLayout {

    private final Button titleBack;
    private final Button titleEdit;

    public TitleLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
//通过LayoutInflater的from方法可以创建出一个LayoutInflater对象，然后调用inflate（）方法可以动态加载布局文件

        LayoutInflater.from(context).inflate(R.layout.title,this);
        titleBack = (Button) findViewById(R.id.title_back);
        titleEdit = (Button) findViewById(R.id.title_edit);
        titleBack.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View view) {
                ((Activity)getContext()).finish();
            }
        });
        titleEdit.setOnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View view) {
                Toast.makeText(getContext(), "You clicked Edit button", Toast.LENGTH_SHORT).show();
            }
        });
    }
}

2.在activity_main.xml中添加这个自定义控件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.itheima.album.uicustomviews.MainActivity">
    <!--<include layout="@layout/title"/>-->
    <com.itheima.album.uicustomviews.TitleLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>