1.首先展示 跳转方法 首先进入
2.进入跳转界面
点击
跳转完毕
此时
已经发生变化
2.数据传递 把一个Activity的数据 跳转到另一个Activity界面中
下一界面:
界面一JAVA:
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class AActivity extends AppCompatActivity {
private Button btn_a;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_a);
btn_a=findViewById(R.id.btn_a);
btn_a.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(AActivity.this,BActivity.class);
Bundle bundle=new Bundle();
bundle.putString("name","zhangsan");
bundle.putInt("number",20);
intent.putExtras(bundle);
startActivity(intent);
}
});
}
}
界面一XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btn_a"
android:layout_marginTop="200dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="跳转到下一界面"
android:layout_gravity="center"/>
<TextView
android:layout_marginTop="50dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="点击跳转到下一界面 这里会传递两个数:zhangsan,20"
android:textSize="20dp"
/>
</LinearLayout>
界面二JAVA:
package com.example.myapplication;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
public class BActivity extends AppCompatActivity {
private TextView tv_b;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_b);
tv_b=findViewById(R.id.tv_b);
Bundle bundle=getIntent().getExtras();
String name = bundle.getString("name");
int number = bundle.getInt("number");
tv_b.setText(name+","+number);
}
}
界面二XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/tv_b"
android:layout_marginTop="200dp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textColor="#000000"
android:textSize="20dp"
/>
</LinearLayout>