package com.example.myapplication;import android.content.Intent; import android.graphics.Color; import android.os.Bundle; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.style.ForegroundColorSpan; import android.view.View; import android.widget.EditText; import android.widget.TextView; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity;public class MainActivity extends AppCompatActivity { private EditText et_number; private TextView tv_show; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); et_number = findViewById(R.id.et_number); tv_show = findViewById(R.id.tv_show); } public void one(View view) { Intent intent = new Intent(); intent.setClass(this, Main2Activity.class); intent.putExtra("number", et_number.getText().toString().trim()); startActivityForResult(intent, 1); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == 1 && resultCode == 2) { String show = data.getStringExtra("data"); tv_show.setTextColor(Color.RED); tv_show.setText("充值成功充值了"+show+"元"); } if (requestCode == 1 && resultCode == 3) { tv_show.setTextColor(Color.RED); tv_show.setText("充值失败"); } }}
package com.example.myapplication;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.EditText;import android.widget.TextView;import androidx.appcompat.app.AppCompatActivity;public class Main2Activity extends AppCompatActivity { private TextView tv_number; private EditText et_money; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); tv_number = findViewById(R.id.tv_number); et_money = findViewById(R.id.et_money); Intent intent = getIntent(); tv_number.setText(intent.getStringExtra("number")); } public void two1(View view) { Intent intent = new Intent(); intent.putExtra("data", et_money.getText().toString().trim()); setResult(2, intent); finish(); } public void two2(View view) { Intent intent = new Intent(); setResult(3, intent); finish(); }}
<?xml version="1.0" encoding="utf-8"?><RelativeLayout 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" tools:context=".MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="60dp" android:layout_marginLeft="20dp" android:layout_marginTop="60dp" android:layout_marginRight="20dp" android:gravity="center"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="手机号码：" android:textColor="@android:color/black" android:textSize="30sp" /> <EditText android:id="@+id/et_number" android:layout_width="match_parent" android:layout_height="50dp" android:layout_gravity="center" /> </LinearLayout> <Button android:layout_width="150dp" android:layout_height="60dp" android:layout_centerInParent="true" android:onClick="one" android:text="充值" android:textSize="35sp" /> <TextView android:id="@+id/tv_show" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginLeft="15dp" android:layout_marginBottom="200dp" android:textColor="@android:color/black" android:textSize="28dp" /></RelativeLayout>
<?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:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context=".Main2Activity"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:layout_marginTop="50dp" android:layout_marginRight="30dp" android:orientation="vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="您的号码是:" android:textSize="35sp" /> <TextView android:id="@+id/tv_number" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="100dp" android:textSize="35sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="40dp" android:layout_marginTop="50dp" android:layout_marginRight="40dp" android:orientation="horizontal"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="充值金额:" android:textSize="35sp" /> <EditText android:id="@+id/et_money" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="15dp" android:textSize="30sp" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="200dp" android:orientation="horizontal"> <Button android:layout_width="120dp" android:layout_height="60dp" android:layout_marginLeft="35dp" android:onClick="two1" android:text="充值" android:textSize="32sp" /> <Button android:layout_width="180dp" android:layout_height="60dp" android:layout_marginLeft="35dp" android:onClick="two2" android:text="取消充值" android:textSize="32sp" /> </LinearLayout></LinearLayout>
