创建和声明变量
-
创建变量
int total; -
初始化变量值
total = 10;
int total = 10;
style.xml
负责引用基本样式，设置默认View的样式，如
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light">
<!-- Customize your theme here. -->
<item name="colorPrimary">#ff9800</item>
<item name="colorPrimaryDark">#ff9800</item>
<item name="colorButtonNormal">#ff9800</item>
</style>
在布局中插入分割线
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="@android:color/darker_gray"/>
Count Counter App 源码
activity_main.xml
<?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="com.example.clixin.countcounter.MainActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:padding="16dp"
android:fontFamily="sans-serif-medium"
android:textColor="#616161"
android:textSize="14sp"
android:text="Team A" />
<TextView
android:id="@+id/team_a_score"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:paddingBottom="4dp"
android:fontFamily="sans-serif-light"
android:textSize="56sp"
android:textColor="#000"
android:text="0" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="addThreeForTeamA"
android:text="+3 Points" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="addTwoForTeamA"
android:text="+2 Points" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="addOneForTeamA"
android:text="Free Throw" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_marginTop="16dp"
android:layout_height="match_parent"
android:background="@android:color/darker_gray"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:padding="16dp"
android:text="Team B"
android:fontFamily="sans-serif-medium"
android:textColor="#616161"
android:textSize="14sp"/>
<TextView
android:id="@+id/team_b_score"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:paddingBottom="4dp"
android:fontFamily="sans-serif-light"
android:textSize="56sp"
android:textColor="#000"
android:text="0" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="addThreeForTeamB"
android:text="+3 Points" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="addTwoForTeamB"
android:text="+2 Points" />
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
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_centerHorizontal="true"
android:layout_marginBottom="8dp"
android:layout_marginLeft="24dp"
android:layout_marginRight="24dp"
android:onClick="reset"
android:text="Reset" />
</RelativeLayout>
Main_Activity.java
package com.example.clixin.countcounter;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import org.w3c.dom.Text;
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 displayForTeamA(int score) {
TextView scoreView = (TextView) findViewById(R.id.team_a_score);
scoreView.setText(String.valueOf(score));
}
public void addThreeForTeamA(View view) {
scoreTeamA = scoreTeamA + 3;
displayForTeamA(scoreTeamA);
}
public void addTwoForTeamA(View view) {
scoreTeamA = scoreTeamA + 2;
displayForTeamA(scoreTeamA);
}
public void addOneForTeamA(View view) {
scoreTeamA = scoreTeamA + 1;
displayForTeamA(scoreTeamA);
}
public void displayForTeamB(int score) {
TextView scoreView = (TextView) findViewById(R.id.team_b_score);
scoreView.setText(String.valueOf(score));
}
public void addThreeForTeamB(View view) {
scoreTeamB = scoreTeamB + 3;
displayForTeamB(scoreTeamB);
}
public void addTwoForTeamB(View view) {
scoreTeamB = scoreTeamB + 2;
displayForTeamB(scoreTeamB);
}
public void addOneForTeamB(View view) {
scoreTeamB = scoreTeamB + 1;
displayForTeamB(scoreTeamB);
}
public void reset(View view) {
scoreTeamA = 0;
scoreTeamB = 0;
displayForTeamA(scoreTeamA);
displayForTeamB(scoreTeamB);
}
}
效果图
