第七周作业
package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import org.w3c.dom.Text; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.login); } public void login(View view){ EditText id = (EditText) findViewById(R.id.edit1); String s = id.getText().toString(); Intent intent=new Intent(); intent.setClass(MainActivity.this, TestActivity.class); intent.putExtra("id",s); startActivity(intent); } } package com.example.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.TextView; public class TestActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_test); TextView t = (TextView)findViewById(R.id.text); Intent intent = this.getIntent(); String id = intent.getStringExtra("id"); System.out.println(intent.getStringExtra("id")); t.setText(id); } } activity_main <?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"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout> activity_test <?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"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" /> </androidx.constraintlayout.widget.ConstraintLayout> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text=""></TextView> <ImageView android:id="@+id/photo" android:layout_width="80dp" android:layout_height="80dp" android:src="@drawable/ic_launcher_background" android:layout_centerHorizontal="true" android:layout_marginTop="200dp" android:layout_marginBottom="30dp"></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:id="@+id/edit1" 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"/> <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:layout_centerHorizontal="true" android:onClick="login"> </Button> </RelativeLayout>