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Activity创建与跳转

  • layout目录下新建activity_main2.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/text2"
tools:ignore="MissingConstraints" />
</androidx.constraintlayout.widget.ConstraintLayout>
  • 修改strings.xml
<resources>
<string name="app_name">demo</string>
<!-- 添加如下 -->
<string name="text2">Activity Main 2</string>
</resources>
  • 新建MainActivity2
package com.example.demo;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity2 extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
}
}
  • AndroidManifest.xml中添加如下
<activity android:name=".MainActivity2" />
  • 修改activity_main.xml,编写添加按钮
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="跳转"
tools:ignore="MissingConstraints" />
  • 修改MainActivity
package com.example.demo;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 添加如下
Button button = findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setClass(MainActivity.this, MainActivity2.class);
startActivity(intent);
}
});
}
}
  • 启动测试
posted @   DogLeftover  阅读(40)  评论(0编辑  收藏  举报
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