安卓第四周作业

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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">
 
 
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent" android:layout_height="match_parent"
        android:paddingTop="200dp" android:paddingLeft="20dp">
 
        <Button
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:id="@+id/btn1"
        android:text="111"
        android:background="#528654">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn2"
            android:text="222"
            android:layout_toRightOf="@id/btn1"
            android:background="#896899">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn3"
            android:text="333"
            android:layout_toRightOf="@id/btn2"
            android:background="#212360">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn4"
            android:text="444"
            android:layout_below="@id/btn1"
            android:background="#FF2589">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn5"
            android:text="555"
            android:layout_below="@id/btn1"
            android:layout_toRightOf="@id/btn4"
            android:background="#008854">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn6"
            android:text="666"
            android:layout_below="@id/btn1"
            android:layout_toRightOf="@id/btn5"
            android:background="#788877">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn7"
            android:text="777"
            android:layout_below="@id/btn4"
            android:background="#896888">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn8"
            android:text="888"
            android:layout_below="@id/btn4"
            android:layout_toRightOf="@id/btn7"
            android:background="#DD4588">
        </Button>
 
        <Button
            android:layout_width="80dp"
            android:layout_height="80dp"
            android:id="@+id/btn9"
            android:text="999"
            android:layout_below="@id/btn4"
            android:layout_toRightOf="@id/btn8"
            android:background="#AA2548">
        </Button>
    </RelativeLayout>
 
</androidx.constraintlayout.widget.ConstraintLayout>

<?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
        android:id="@+id/photo"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_centerInParent="true"
        android:src="@drawable/photo"></ImageView>
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/photo"
        android:maxLength="15"
        android:layout_marginTop="13dp"
        android:text="账号："/>
 
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/photo"
        android:layout_toRightOf="@id/textView1"
        android:hint="请输入您的账号"></EditText>
 
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textView1"
        android:maxLength="20"
        android:layout_marginTop="25dp"
        android:text="密码：" />
 
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/textView1"
        android:layout_toRightOf="@id/textView2"
        android:layout_marginTop="10dp"
        android:hint="请输入您的密码">
    </EditText>
 
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/button"
        android:text="登录"
        android:textColor="#478595"
        android:layout_below="@id/textView2"
        android:layout_marginTop="20dp"
        android:layout_marginLeft="120dp"
        android:onClick="click">
    </Button>
 
</RelativeLayout>

package com.example.myhomework1;
 
import androidx.appcompat.app.AppCompatActivity;
 
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
 
public class MainActivity extends AppCompatActivity {
 
    private Button mybutton_one;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        mybutton_one = (Button) findViewById(R.id.button);
    }
 
 
    public void click(View view){
        mybutton_one.setText("登录按钮被点击");
    }
}

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<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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">           <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"         android:layout_width="match_parent" android:layout_height="match_parent"         android:paddingTop="200dp" android:paddingLeft="20dp">            <Button         android:layout_width="80dp"         android:layout_height="80dp"         android:id="@+id/btn1"         android:text="111"         android:background="#528654">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn2"             android:text="222"             android:layout_toRightOf="@id/btn1"             android:background="#896899">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn3"             android:text="333"             android:layout_toRightOf="@id/btn2"             android:background="#212360">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn4"             android:text="444"             android:layout_below="@id/btn1"             android:background="#FF2589">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn5"             android:text="555"             android:layout_below="@id/btn1"             android:layout_toRightOf="@id/btn4"             android:background="#008854">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn6"             android:text="666"             android:layout_below="@id/btn1"             android:layout_toRightOf="@id/btn5"             android:background="#788877">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn7"             android:text="777"             android:layout_below="@id/btn4"             android:background="#896888">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn8"             android:text="888"             android:layout_below="@id/btn4"             android:layout_toRightOf="@id/btn7"             android:background="#DD4588">         </Button>            <Button             android:layout_width="80dp"             android:layout_height="80dp"             android:id="@+id/btn9"             android:text="999"             android:layout_below="@id/btn4"             android:layout_toRightOf="@id/btn8"             android:background="#AA2548">         </Button>     </RelativeLayout>    </androidx.constraintlayout.widget.ConstraintLayout>