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); } } |
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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); } } |
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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" > <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>
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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" > <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> |
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<?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> |