多Activity应用

Posted 2020-09-11

第一个界面
<EditText
    android:id="@+id/shuru"
    android:layout_marginTop="180dp"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:hint="请输入姓名"></EditText>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:id="@+id/in"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:text="进入评估"
            />
        <Button
            android:id="@+id/out"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dp"
            android:text="退出" />
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/tv1"/>

第二个界面相应代码
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_gou"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:gravity="center"
    android:orientation="vertical"
    tools:context="lenovo_com.liyuan.GouActivity">
    
    <TextView
            android:id="@+id/question"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:hint="gou同学：学习安卓有没有信心"
            android:textSize="20sp"
            android:gravity="center"
            android:layout_marginTop="10dp"/>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:id="@+id/no"
            android:layout_marginTop="20dp"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="没有"
            android:layout_weight="1"/>
        <Button
            android:id="@+id/yes"
            android:layout_marginTop="20dp"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="有"
            android:layout_weight="1"/>

对其功能的实现

package lenovo_com.liyuan;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class GouActivity extends AppCompatActivity {
    private EditText edt;
    private Button no;
    private Button yes;
    private TextView question;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gou);
        @Override

            Button yes=(Button)findViewById(R.id.yes);
            Button no=(Button)findViewById(R.id.no);
            yes.setOnClickListener(new view .OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent=new Intent(GouActivity.this,MainActivity.class);
                    intent.putExtra("change","有");
                    setResult(1,intent);
                    startActivity(intent);
                }
            });
           no.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent=new Intent(GouActivity.this,MainActivity.class);
                    intent.putExtra("change","没有");
                    setResult(2,intent);
                    startActivity(intent);
                }
            });
            question=(TextView)findViewById(R.id.show);
            question.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    question=(TextView)findViewById(R.id.show);
                    Intent intent = getIntent();
                    String name=intent.getStringExtra("name");
                    question.setText(name);
                    finish();
                }
            });


        }
    }
    }
}