练习 2篮球记分板

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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">
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <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="horizontal">
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="4dp"
            android:text="Team A"
            android:textSize="14sp"
            android:textColor="#616161"
            android:fontFamily="sans-serif-medium"/>

        <TextView
            android:id="@+id/team_a_score"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="4dp"
            android:text="0"
            android:textSize="56sp"
            android:textColor="#000000"
            android:fontFamily="sans-serif-light"/>

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:onClick="addThreeForTeamA"
            android:text="+3 Points" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:onClick="addTwoForTeamA"
            android:text="+2 Points" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="8dp"
            android:onClick="addOneForTeamA"
            android:text="Free throw" />


    </LinearLayout>
        <View
            android:layout_width="1dp"
            android:layout_height="match_parent"
            android:background="@android:color/darker_gray"/>
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:padding="4dp"
                android:text="Team B"
                android:textSize="14sp"
                android:textColor="#616161"
                android:fontFamily="sans-serif-medium"/>

            <TextView
                android:id="@+id/team_b_score"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:padding="4dp"
                android:text="0"
                android:textSize="56sp"
                android:textColor="#000000"
                android:fontFamily="sans-serif-light"/>

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="8dp"
                android:onClick="addThreeForTeamB"
                android:text="+3 Points" />

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="8dp"
                android:onClick="addTwoForTeamB"
                android:text="+2 Points" />

            <Button
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_margin="8dp"
                android:onClick="addOneForTeamB"
                android:text="Free throw" />
        </LinearLayout>
    </LinearLayout>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_centerInParent="true"
            android:padding="4dp"
            android:text="RESET"
            android:onClick="resetScore"/>
    </RelativeLayout>

</android.support.constraint.ConstraintLayout>

package com.learn.nianhao.courtcount;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    int scoreTeamA=0;
    int scoreTeamB=0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void addThreeForTeamA(View view) {
        scoreTeamA+=3;
        displayForTeamA(scoreTeamA);
    }

    public void addTwoForTeamA(View view) {
        scoreTeamA+=2;
        displayForTeamA(scoreTeamA);
    }

    public void addOneForTeamA(View view) {
        scoreTeamA+=1;
        displayForTeamA(scoreTeamA);
    }
    public void displayForTeamA(int score) {
        TextView scoreView = (TextView) findViewById(R.id.team_a_score);
        scoreView.setText(String.valueOf(score));
    }

    public void addOneForTeamB(View view) {
        scoreTeamB+=1;
        displayForTeamB(scoreTeamB);

    }

    public void addTwoForTeamB(View view) {
        scoreTeamB+=2;
        displayForTeamB(scoreTeamB);

    }

    public void addThreeForTeamB(View view) {
        scoreTeamB+=3;
        displayForTeamB(scoreTeamB);
    }
    public void displayForTeamB(int score) {
        TextView scoreView = (TextView) findViewById(R.id.team_b_score);
        scoreView.setText(String.valueOf(score));
    }

    public void resetScore(View view) {
        scoreTeamB=0;
        scoreTeamA=0;
        displayForTeamA(0);
        displayForTeamB(0);
    }
}