Android 作业07

package com.example.myapplication;

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 androidx.appcompat.app.AppCompatActivity;

public class MainActivity2 extends AppCompatActivity {
    private TextView tv3;
    private EditText et2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        tv3 = findViewById(R.id.tv3);
        et2 = findViewById(R.id.et2);
        Intent intent = getIntent();
        tv3.setText(intent.getStringExtra("number"));
    }

    public void two1(View view) {
        Intent intent = new Intent();
        intent.putExtra("data", et2.getText().toString().trim());
        setResult(2, intent);
        finish();
    }

    public void two2(View view) {
        Intent intent = new Intent();
        setResult(3, intent);
        finish();
    }
}

 

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.Button;
import android.widget.EditText;
import android.widget.TextView;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {
    private EditText et1;
    private TextView tv1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et1 = findViewById(R.id.et1);
        tv1 = findViewById(R.id.tv1);

    }

    public void one(View view) {
        Intent intent = new Intent();
        intent.setClass(this, MainActivity2.class);
        intent.putExtra("number", et1.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");
            String num = et1.getText().toString().trim();
            SpannableStringBuilder builder = new SpannableStringBuilder("您为号码" + num + "\n        充值了" + show + "钱");
            ForegroundColorSpan span1 = new ForegroundColorSpan(Color.RED);
            builder.setSpan(span1, 4, 4 + num.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            ForegroundColorSpan span2 = new ForegroundColorSpan(Color.RED);
            builder.setSpan(span2, 4 + num.length() + 12, 4 + num.length() + 12 + show.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            tv1.setText(builder);
        }
        if (requestCode == 1 && resultCode == 3) {
            tv1.setTextColor(Color.RED);
            tv1.setText("充值失败");

        }
    }
}

<?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:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="5dp"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="128dp"
        android:layout_marginEnd="9dp"
        android:layout_marginRight="9dp"
        android:layout_marginBottom="378dp"
        android:text="手机号码："
        android:textColor="#805475"
        android:textSize="25dp"
        app:layout_constraintBottom_toTopOf="@+id/tv1"
        app:layout_constraintEnd_toStartOf="@+id/et1"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="MissingConstraints" />

    <EditText
        android:id="@+id/et1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="126dp"
        android:layout_marginBottom="153dp"
        android:ems="10"
        android:textColor="#805475"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/textView3"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_marginStart="145dp"
        android:layout_marginLeft="145dp"
        android:layout_marginEnd="144dp"
        android:layout_marginRight="144dp"
        android:layout_marginBottom="168dp"
        android:background="#805475"
        android:onClick="one"
        android:text="充值"
        android:textColor="#ffffff"
        app:layout_constraintBottom_toTopOf="@+id/tv1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="@+id/textView3"
        app:layout_constraintTop_toBottomOf="@+id/et1"
        tools:ignore="MissingConstraints" />

    <TextView
        android:id="@+id/tv1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_alignParentBottom="false"
        android:layout_marginStart="46dp"
        android:layout_marginLeft="46dp"
        android:layout_marginEnd="46dp"
        android:layout_marginRight="46dp"
        android:layout_marginBottom="141dp"
        android:textColor="@android:color/black"
        android:textSize="28dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView3"
        tools:ignore="MissingConstraints" />


</androidx.constraintlayout.widget.ConstraintLayout>

<?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:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="72dp"
        android:text="您所充值的号码为:"
        android:textSize="35sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="MissingConstraints" />

    <TextView
        android:id="@+id/tv3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="137dp"
        android:textSize="35sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:ignore="MissingConstraints" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="60dp"
        android:text="选择您要为其充值的金额："
        android:textColor="#805475"
        android:textSize="25dp"
        app:layout_constraintBottom_toTopOf="@+id/et2"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.559"
        app:layout_constraintStart_toStartOf="parent" />

    <EditText
        android:id="@+id/et2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPersonName"
        tools:ignore="MissingConstraints"
        tools:layout_editor_absoluteX="99dp"
        tools:layout_editor_absoluteY="287dp" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="76dp"
        android:layout_marginLeft="76dp"
        android:layout_marginTop="68dp"
        android:background="#805475"
        android:onClick="two1"
        android:text="充值"
        android:textColor="#ffffff"
        android:textSize="20dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/et2"
        tools:ignore="MissingConstraints,OnClick" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="52dp"
        android:layout_marginRight="52dp"
        android:layout_marginBottom="280dp"
        android:background="#805475"
        android:onClick="two2"
        android:text="取消"
        android:textColor="#ffffff"
        android:textSize="20dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        tools:ignore="MissingConstraints,OnClick" />

</androidx.constraintlayout.widget.ConstraintLayout>