3.17

所花时间（包括上课）：3.5

打码量(行)：660

博客量(篇)：1

了解到知识点：学习ImageView

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

 

    <!-- ImageView -->

    <ImageView

        android:id="@+id/imageView"

        android:layout_width="200dp"

        android:layout_height="200dp"

        android:layout_centerInParent="true"

        android:src="@drawable/sample_image"

        android:scaleType="centerCrop" />

 

</RelativeLayout>

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

 

public class MainActivity extends AppCompatActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

}