本文实例为大家分享了android实现掷骰子效果的具体代码，供大家参考，具体内容如下
利用handler接受子线程的消息完成骰子点数的不断更替
演示
start:开始游戏
stop:停止游戏
recover:重置色子到初始状态
代码
package com.example.homeworkten;
import androidx.annotation.nonnull;
import androidx.appcompat.app.appcompatactivity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.view.view;
import android.widget.button;
import android.widget.imageview;
import android.widget.toast;
public class mainactivity extends appcompatactivity {
private imageview imageview1,imageview2,imageview3;
private button button1,button2,button3;
private imageview[] imageviews;
private handler handler;
//子线程
private thread thread;
//记录每个色子的点数
private int number[];
//色子的总点数
private int count;
//volatile修饰符用来保证其它线程读取的总是该变量的最新的值
public volatile boolean isstop = false;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
number = new int[3];
imageview1 = findviewbyid(r.id.imageview1);
imageview2 = findviewbyid(r.id.imageview2);
imageview3 = findviewbyid(r.id.imageview3);
button1 = findviewbyid(r.id.button1);
button2 = findviewbyid(r.id.button2);
button3 = findviewbyid(r.id.button3);
imageviews = new imageview[]{imageview1,imageview2,imageview3};
button1.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
//判断线程是否存在
if (thread != null&&isstop == true){
isstop = false;
}
handler = new handler(){
@override
public void handlemessage(@nonnull message msg) {
super.handlemessage(msg);
for(int i = 0;i < 3;i++) {
switch (number[i]) {
case 1:
imageviews[i].setimageresource(r.drawable.t1);
break;
case 2:
imageviews[i].setimageresource(r.drawable.t2);
break;
case 3:
imageviews[i].setimageresource(r.drawable.t3);
break;
case 4:
imageviews[i].setimageresource(r.drawable.t4);
break;
case 5:
imageviews[i].setimageresource(r.drawable.t5);
break;
case 6:
imageviews[i].setimageresource(r.drawable.t6);
break;
}
}
}
};
thread = new thread(new runnable() {
@override
public void run() {
while (!isstop) {
message message = handler.obtainmessage();
//总点数归零
count = 0;
for (int i = 0; i < 3; i++) {
try {
thread.sleep(50);
} catch (interruptedexception e) {
e.printstacktrace();
}
//生成随机数
int random = (int) (math.random() * 6 + 1);
number[i] = random;
count += random;
}
handler.sendmessage(message);
}
}
});
thread.start();
}
});
//停止掷筛子
button2.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
if(isstop == false) {
isstop = true;
try {
//当子线程执行完以后才继续执行主线程
thread.join();
} catch (interruptedexception e) {
e.printstacktrace();
}
//显示掷出的点数
toast.maketext(mainactivity.this, "你掷的点数为" + count, toast.length_short).show();
}else {
toast.maketext(mainactivity.this, "请点击开始键进行掷色子", toast.length_short).show();
}
}
});
//将色子还原到初始状态
button3.setonclicklistener(new view.onclicklistener() {
@override
public void onclick(view v) {
if(isstop == true) {
for (int i = 0; i < 3; i++) {
imageviews[i].setimageresource(r.drawable.t1);
}
}else {
toast.maketext(mainactivity.this, "请先停止游戏，再重新开始", toast.length_short).show();
}
}
});
}
}
xmlns:app="/apk/res-auto"
xmlns:tools="/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".mainactivity">
android:id="@+id/imageview1"
android:layout_width="100dp"
android:layout_height="80dp"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
app:layout_constraintend_tostartof="@+id/imageview2"
app:layout_constrainthorizontal_bias="0.482"
app:layout_constraintstart_tostartof="parent"
app:layout_constrainttop_totopof="parent"
app:srccompat="@drawable/t1" />
android:id="@+id/imageview2"
android:layout_width="100dp"
android:layout_height="80dp"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
app:layout_constraintend_tostartof="@+id/imageview3"
app:layout_constraintstart_toendof="@+id/imageview1"
app:layout_constrainttop_totopof="parent"
app:srccompat="@drawable/t1" />
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
android:text="start"
app:layout_constraintend_tostartof="@+id/button2"
app:layout_constraintstart_tostartof="parent"
app:layout_constrainttop_tobottomof="@+id/imageview1" />
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
android:text="stop"
app:layout_constraintend_tostartof="@+id/button3"
app:layout_constraintstart_toendof="@+id/button1"
app:layout_constrainttop_tobottomof="@+id/imageview2" />
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
android:text="recover"
app:layout_constraintend_toendof="parent"
app:layout_constraintstart_toendof="@+id/button2"
app:layout_constrainttop_tobottomof="@+id/imageview3" />
android:id="@+id/imageview3"
android:layout_width="100dp"
android:layout_height="80dp"
android:layout_marginstart="10dp"
android:layout_marginleft="10dp"
android:layout_margintop="40dp"
android:layout_marginend="10dp"
android:layout_marginright="10dp"
app:layout_constraintend_toendof="parent"
app:layout_constraintstart_toendof="@+id/imageview2"
app:layout_constrainttop_totopof="parent"
app:srccompat="@drawable/t1" />
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