Ubuntu系统下Android4.0源码开发多寄存器变量路口信号灯控制系统(课程设计)
前言
Ubuntu系统版本：12.04
Android源码文件夹名：aosp
Goldfish内核文件夹名：goldfish
项目工程名：Tslights
本项目使用多寄存器变量存取
程序运行效果：
1.1 底层驱动程序代码编写
文件结构
~/goldfish2.6.29/drivers
-----tslights.h
-----tslights.c
-----Kconfig
-----Makefile
tslights.h
#ifndef _FAKE_REG_H_
#define _FAKE_REG_H_
#include
#include
#define TSLIGHTS_DEVICE_NODE_NAME "tslights"
#define TSLIGHTS_DEVICE_FILE_NAME "tslights"
#define TSLIGHTS_DEVICE_PROC_NAME "tslights"
#define TSLIGHTS_DEVICE_CLASS_NAME "tslights"
struct tslights_dev {
int red_init;//红灯状态值
int red_time;//红灯时间
int green_init;
int green_time;
int yellow_init;
int yellow_time;
};
#endif tslights.c
#include
#include
#include
#include
#include
#include
#include
#include "tslights.h"
static int tslights_major = 0;
static int tslights_minor = 0;
static struct cdev rdev; // 定义字符设备
static struct class* tslights_class = NULL;
static struct tslights_dev* tslightsdev = NULL;
static char tslights_buff[256];
static ssize_t tslights_read(struct file* filp, char __user *buf, size_t count, loff_t* f_pos) {
copy_to_user((struct tslights_dev __user *)buf, tslightsdev, sizeof(struct tslights_dev));
return 0;
}
static ssize_t tslights_write(struct file* filp, const char __user *buf, size_t count, loff_t* f_pos) {
copy_from_user(tslightsdev, (struct tslights_dev __user *)buf, count);
return 0;
}
static struct file_operations tslights_ops = {
.owner = THIS_MODULE,
.read = tslights_read,
.write = tslights_write,
};
static ssize_t tslights_proc_read(char* page, char** start, off_t off, int count, int* eof, void* data) {
if(off > 0) {
*eof = 1;
return 0;
}
int len;
int* red_init = (int*)kmalloc(64, GFP_KERNEL);
int* red_time = (int*)kmalloc(64, GFP_KERNEL);
int* green_init = (int*)kmalloc(64, GFP_KERNEL);
int* green_time = (int*)kmalloc(64, GFP_KERNEL);
int* yellow_init = (int*)kmalloc(64, GFP_KERNEL);
int* yellow_time = (int*)kmalloc(64, GFP_KERNEL);
sprintf(red_init, "%d", tslightsdev->red_init);
sprintf(red_time, "%d", tslightsdev->red_time);
sprintf(green_init, "%d", tslightsdev->green_init);
sprintf(green_time, "%d", tslightsdev->green_time);
sprintf(yellow_init, "%d", tslightsdev->yellow_init);
sprintf(yellow_time, "%d", tslightsdev->yellow_time);
memset(tslights_buff, 0, 256);
strcat(tslights_buff,"red state:");
strcat(tslights_buff,red_init);
strcat(tslights_buff," red time:");
strcat(tslights_buff,red_time);
strcat(tslights_buff,"green state:");
strcat(tslights_buff,green_init);
strcat(tslights_buff," green time:");
strcat(tslights_buff,green_time);
strcat(tslights_buff,"yellow state:");
strcat(tslights_buff,yellow_init);
strcat(tslights_buff," yellow time:");
strcat(tslights_buff,yellow_time);
kfree(red_init);
kfree(red_time);
kfree(green_init);
kfree(green_time);
kfree(yellow_init);
kfree(yellow_time);
len=sprintf(page,tslights_buff);
return len;
}
static ssize_t tslights_proc_write(struct file* filp, const char __user *buff, unsigned long len, void* data) {
return 0;
}
static void tslights_create_proc(void) {
struct proc_dir_entry* entry;
entry = create_proc_entry(TSLIGHTS_DEVICE_PROC_NAME, 0, NULL);
if(entry) {
entry->owner = THIS_MODULE;
entry->read_proc = tslights_proc_read;
entry->write_proc = tslights_proc_write;
}
}
static void tslights_remove_proc(void) {
remove_proc_entry(TSLIGHTS_DEVICE_PROC_NAME, NULL);
}
// 初始化模块时操作
static int __init tslights_init(void)
{
int result;
dev_t dev = 0;
tslightsdev = (struct tslights_dev*) kmalloc(sizeof(struct tslights_dev), GFP_KERNEL);
alloc_chrdev_region(&dev, 0, 1, TSLIGHTS_DEVICE_NODE_NAME);
tslights_major = MAJOR(dev);
tslights_minor = MINOR(dev);
cdev_init(&rdev, &tslights_ops);
result = cdev_add(&rdev, dev, 1);
tslights_create_proc();
tslightsdev->green_init=1;
tslightsdev->yellow_init=0;
tslightsdev->red_init = 0;
tslightsdev->green_time=10;
tslightsdev->yellow_time=3;
tslightsdev->red_time=8;
tslights_class = class_create(THIS_MODULE, TSLIGHTS_DEVICE_CLASS_NAME);
struct device* RCtemp = device_create(tslights_class, NULL, dev, "%s", TSLIGHTS_DEVICE_FILE_NAME); // 创建一个字符结点文件
if (result < 0) goto add_err;
return 0;
add_err:
unregister_chrdev_region(dev, 1);
return -1;
}
// 卸载模块时操作
static void __exit tslights_exit(void)
{
dev_t dev = MKDEV(tslights_major, tslights_minor);
tslights_remove_proc();
cdev_del(&rdev);
kfree(tslightsdev);
unregister_chrdev_region(dev, 1);
}
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TSLights Register Driver");
module_init(tslights_init);
module_exit(tslights_exit);
Kconfig
config TSLIGHTS
tristate "Tslights Register Driver"
default n
help
This is the tslights driver for android system.Makefile
obj-$(CONFIG_TSLIGHTS) += tslights.o1.2 修改内核Kconfig文件
打开arch/arm/Kconfig文件
在这两行之间
menu "Device Drivers"
.....
endmenu
插入 source "drivers/tslgihts/Kconfig"
1.3 修改内核Makefile文件
打开drivers/Makefile文件，在里面添加以下一行内容：
......
obj-$(CONFIG_TSLIGHTS)+=tslights/
1.4 编译内核驱动程序模块
在goldfish目录下执行 make menuconfig命令来配置它的编译方式
选择 "Device Drivers" 回车
选择 Fake Register Driver项按Y键
配置完成后保存编译配置，退出make menuconfig命令。
接着执行 ./build_kernel.sh命令
1.5 编写硬件抽象层模块接口
文件结构：
~/aosp/hardware/libhardware
-----include/hardware
tslights.h
-----modules/tslights
tslights.cpp
android.mk
tslights.h
#ifndef ANDROID_TSLIGHTS_INTERFACE_H
#define ANDROID_TSLIGHTS_INTERFACE_H
#include
__BEGIN_DECLS
/**
* The id of this module
*/
#define TSLIGHTS_HARDWARE_MODULE_ID "tslights"
/**
* The id of this device
*/
#define TSLIGHTS_HARDWARE_DEVICE_ID "tslights"
struct tslights_module_t {
struct hw_module_t common;
};
struct tslights_dev {
int red_init;
int red_time;
int green_init;
int green_time;
int yellow_init;
int yellow_time;
};
struct tslights_device_t {
struct hw_device_t common;
int fd;
int (*set_tslightsdev)(struct tslights_device_t* dev,struct tslights_dev tslightsdev);
int (*get_tslightsdev)(struct tslights_device_t* dev,struct tslights_dev* tslightsdev);
};
__END_DECLS
#endif
tslights.cpp
#define LOG_TAG "tslightsHALStub"
#include
#include
#include
#include
#include
#include
#define DEVICE_NAME "/dev/tslights"
#define MODULE_NAME "tslights"
#define MODULE_AUTHOR "Clear_Zhang"
static int tslights_device_open(const struct hw_module_t* module, const char* id, struct hw_device_t** device);
static int tslights_device_close(struct hw_device_t* device);
static int tslights_set_tslightsdev(struct tslights_device_t* dev,struct tslights_dev tslightsdev);
static int tslights_get_tslightsdev(struct tslights_device_t* dev,struct tslights_dev* tslightsdev);
static struct hw_module_methods_t tslights_module_methods = {
open: tslights_device_open
};
struct tslights_module_t HAL_MODULE_INFO_SYM = {
common: {
tag: HARDWARE_MODULE_TAG,
version_major: 1,
version_minor: 0,
id: TSLIGHTS_HARDWARE_MODULE_ID,
name: MODULE_NAME,
author: MODULE_AUTHOR,
methods: &tslights_module_methods,
}
};
static int tslights_device_open(const struct hw_module_t* module, const char* id, struct hw_device_t** device) {
if(!strcmp(id, TSLIGHTS_HARDWARE_DEVICE_ID)) {
struct tslights_device_t* dev;
struct tslights_dev* tslightsdev = (struct tslights_dev*)malloc(sizeof(struct tslights_dev));
dev = (struct tslights_device_t*)malloc(sizeof(struct tslights_device_t));
if(!dev) {
LOGE("Failed to alloc space for tslights_device_t.");
return -EFAULT;
}
memset(dev, 0, sizeof(struct tslights_device_t));
dev->common.tag = HARDWARE_DEVICE_TAG;
dev->common.version = 0;
dev->common.module = (hw_module_t*)module;
dev->common.close = tslights_device_close;
dev->set_tslightsdev = tslights_set_tslightsdev;
dev->get_tslightsdev = tslights_get_tslightsdev;
if((dev->fd = open(DEVICE_NAME, O_RDWR)) == -1) {
LOGE("Failed to open device file /dev/tslights -- %s.", strerror(errno));
free(dev);
return -EFAULT;
}
*device = &(dev->common);
LOGI("Open device file /dev/tslights successfully.");
return 0;
}
return -EFAULT;
}
static int tslights_device_close(struct hw_device_t* device) {
struct tslights_device_t* tslights_device = (struct tslights_device_t*)device;
if(tslights_device) {
close(tslights_device->fd);
free(tslights_device);
}
return 0;
}
static int tslights_set_tslightsdev(struct tslights_device_t* dev, struct tslights_dev tslightsdev) {
if(!dev) {
LOGE("Null dev pointer.");
return -EFAULT;
}
LOGI("Set value %d to device file /dev/tslights.", tslightsdev.red_init);
write(dev->fd, &tslightsdev, sizeof(struct tslights_dev));
return 0;
}
static int tslights_get_tslightsdev(struct tslights_device_t* dev,struct tslights_dev* tslightsdev) {
if(!dev) {
LOGE("Null dev pointer.");
return -EFAULT;
}
if(!tslightsdev) {
LOGE("Null val pointer.");
return -EFAULT;
}
read(dev->fd, tslightsdev, sizeof(struct tslights_dev));
LOGI("Get value %d from device file /dev/tslights.", tslightsdev->red_init);
return 0;
}
Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_PRELINK_MODULE := false
LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
LOCAL_SHARED_LIBRARIES := liblog
LOCAL_SRC_FILES := tslights.cpp
LOCAL_MODULE := tslights.default
include $(BUILD_SHARED_LIBRARY)执行mmm和make snod命令对其进行编译和打包
1.6 处理硬件设备访问权限问题
1、解压ramdisk.img镜像文件
2、还原ramdisk.img镜像文件
3、修改ueventd.rc文件
进入ramdisk目录中，打开ueventd.rc文件，向文件里添加以下内容：
/dev/tslights 0666 root root
4、重新打包ramdisk.img镜像文件
1.7 定义硬件访问服务接口
文件结构：
~/aosp/frameworks/base/core/java/android/os
-----ITslightsService.aidl
ITslightsService.aidl
package android.os;
interface ITslightsService {
void setRed_init(int red_init);
int getRed_init();
void setRed_time(int red_time);
int getRed_time();
void setGreen_init(int green_init);
int getGreen_init();
void setGreen_time(int green_time);
int getGreen_time();
void setYellow_init(int yellow_init);
int getYellow_init();
void setYellow_time(int yellow_time);
int getYellow_time();
}
进入到frameworks/base目录中，打开Android.mk文件，修改LOCAL_SRC_FILES变量的值
添加 core/java/android/os/ITslightsService.aidl
编译硬件访问服务接口
1.8 实现硬件访问服务
文件结构：
~/aosp/frameworks/base/service/java/com/anroid/server
-----TslightsService.java
TslightsService.java
package com.android.server;
import android.content.Context;
import android.os.ITslightsService;
import android.util.Slog;
public class TslightsService extends ITslightsService.Stub {
private static final String TAG = "TslightsService";
private int mPtr = 0;
TslightsService() {
mPtr = init_native();
if(mPtr == 0) {
Slog.e(TAG, "Failed to initialize tslights service.");
}
}
public void setRed_init(int red_init) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setRed_init_native(mPtr, red_init);
}
public int getRed_init() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getRed_init_native(mPtr);
}
public void setRed_time(int red_time) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setRed_time_native(mPtr, red_time);
}
public int getRed_time() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getRed_time_native(mPtr);
}
public void setGreen_init(int green_init) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setGreen_init_native(mPtr, green_init);
}
public int getGreen_init() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getGreen_init_native(mPtr);
}
public void setGreen_time(int green_time) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setGreen_time_native(mPtr, green_time);
}
public int getGreen_time() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getGreen_time_native(mPtr);
}
public void setYellow_init(int yellow_init) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setYellow_init_native(mPtr, yellow_init);
}
public int getYellow_init() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getYellow_init_native(mPtr);
}
public void setYellow_time(int yellow_time) {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return;
}
setYellow_time_native(mPtr, yellow_time);
}
public int getYellow_time() {
if(mPtr == 0) {
Slog.e(TAG, "Tslights service is not initialized.");
return 0;
}
return getYellow_time_native(mPtr);
}
private static native int init_native();
private static native void setRed_init_native(int ptr, int red_init);
private static native int getRed_init_native(int ptr);
private static native void setRed_time_native(int ptr, int red_time);
private static native int getRed_time_native(int ptr);
private static native void setGreen_init_native(int ptr, int green_init);
private static native int getGreen_init_native(int ptr);
private static native void setGreen_time_native(int ptr, int green_time);
private static native int getGreen_time_native(int ptr);
private static native void setYellow_init_native(int ptr, int yellow_init);
private static native int getYellow_init_native(int ptr);
private static native void setYellow_time_native(int ptr, int yellow_time);
private static native int getYellow_time_native(int ptr);
};
执行mmm命令编译services模块
1.9 实现硬件访问服务的JNI方法
文件结构：
~/aosp/frameworks/base/service/jni/
-----com_android_server_TslightsService.cpp
com_android_server_TslightsService.cpp
#define LOG_TAG "TslightsServiceJNI"
#include "jni.h"
#include "JNIHelp.h"
#include "android_runtime/AndroidRuntime.h"
#include
#include
#include
#include
#include
struct tslights_dev tslightsdev;
namespace android
{
static void tslights_setRed_init(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.red_init = value;
LOGI("Set value %d to device tslights.", tslightsdev.red_init);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getRed_init(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.red_init);
return tslightsdev.red_init;
}
///////////////////////////////////////////////////////////////////////////////////
static void tslights_setRed_time(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.red_time = value;
LOGI("Set value %d to device tslights.", tslightsdev.red_time);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getRed_time(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.red_time);
return tslightsdev.red_time;
}
///////////////////////////////////////////////////////////////////////////////////
static void tslights_setGreen_init(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.green_init = value;
LOGI("Set value %d to device tslights.", tslightsdev.green_init);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getGreen_init(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.green_init);
return tslightsdev.green_init;
}
///////////////////////////////////////////////////////////////////////////////////
static void tslights_setGreen_time(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.green_time = value;
LOGI("Set value %d to device tslights.", tslightsdev.green_time);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getGreen_time(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.green_time);
return tslightsdev.green_time;
}
///////////////////////////////////////////////////////////////////////////////////
static void tslights_setYellow_init(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.yellow_init = value;
LOGI("Set value %d to device tslights.", tslightsdev.yellow_init);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getYellow_init(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.yellow_init);
return tslightsdev.yellow_init;
}
///////////////////////////////////////////////////////////////////////////////////
static void tslights_setYellow_time(JNIEnv* env, jobject clazz, jint ptr, jint value) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return;
}
tslightsdev.yellow_time = value;
LOGI("Set value %d to device tslights.", tslightsdev.yellow_time);
device->set_tslightsdev(device, tslightsdev);
}
static jint tslights_getYellow_time(JNIEnv* env, jobject clazz, jint ptr) {
tslights_device_t* device = (tslights_device_t*)ptr;
if(!device) {
LOGE("Device tslights is not open.");
return 0;
}
device->get_tslightsdev(device, &tslightsdev);
LOGI("Get value %d from device tslights.", tslightsdev.yellow_time);
return tslightsdev.yellow_time;
}
static inline int tslights_device_open(const hw_module_t* module, struct tslights_device_t** device) {
return module->methods->open(module, TSLIGHTS_HARDWARE_DEVICE_ID, (struct hw_device_t**)device);
}
static jint tslights_init(JNIEnv* env, jclass clazz) {
tslights_module_t* module;
tslights_device_t* device;
LOGI("Initializing HAL stub tslights......");
if(hw_get_module(TSLIGHTS_HARDWARE_MODULE_ID, (const struct hw_module_t**)&module) == 0) {
LOGI("Device tslights found.");
if(tslights_device_open(&(module->common), &device) == 0) {
LOGI("Device tslights is open.");
return (jint)device;
}
LOGE("Failed to open device tslights.");
return 0;
}
LOGE("Failed to get HAL stub tslights.");
return 0;
}
static const JNINativeMethod method_table[] = {
{"init_native", "()I", (void*)tslights_init},
{"setRed_init_native", "(II)V", (void*)tslights_setRed_init},
{"getRed_init_native", "(I)I", (void*)tslights_getRed_init},
{"setRed_time_native", "(II)V", (void*)tslights_setRed_time},
{"getRed_time_native", "(I)I", (void*)tslights_getRed_time},
{"setGreen_init_native", "(II)V", (void*)tslights_setGreen_init},
{"getGreen_init_native", "(I)I", (void*)tslights_getGreen_init},
{"setGreen_time_native", "(II)V", (void*)tslights_setGreen_time},
{"getGreen_time_native", "(I)I", (void*)tslights_getGreen_time},
{"setYellow_init_native", "(II)V", (void*)tslights_setYellow_init},
{"getYellow_init_native", "(I)I", (void*)tslights_getYellow_init},
{"setYellow_time_native", "(II)V", (void*)tslights_setYellow_time},
{"getYellow_time_native", "(I)I", (void*)tslights_getYellow_time},
};
int register_android_server_TslightsService(JNIEnv *env) {
return jniRegisterNativeMethods(env, "com/android/server/TslightsService", method_table, NELEM(method_table));
}
};
进入到frameworks/base/services/jni目录中，打开Android.mk文件，修改变量LOCAL_SRC_FILES的值
LOCAL_SRC_FILES += \
......
com_android_server_TslightsService.cpp/
onload.cpp
修改完成后，执行mmm命令来重新编译libandroid_servers模块
1.10 启动硬件访问服务
进入到frameworks/base/services/java/com/android/server目录中，打开SystemServer.java文件，修改ServerThread类的成员函数run的实现：
try {
Slog.i(TAG, "Tslights Service");
ServiceManager.addService("tslights", new TslightsService());
} catch (Throwable e) {
Slog.e(TAG, "Failure starting Tslights Service", e);
}
最后，执行mmm和make snod命令
2.1开发Android应用程序
文件结构：
~/aosp/packages/experimental/Tslights
-----AndroidManifest.xml
-----Android.mk
-----src
-----clear/zhang/tslights
Tslights.java
-----res
-----layout
Main..xml
-----drewable
icon.png
pred.jpg
pgreen.jpg
pyellow.jpg
-----values
Strings.xml
Tslights.java
package clear.zhang.tslights;
import android.app.Activity;
import android.os.ServiceManager;
import android.os.Bundle;
import android.os.ITslightsService;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.os.Handler;
import android.widget.LinearLayout;
import android.widget.ImageView;
import android.os.Message;
import android.os.CountDownTimer;
public class Tslights extends Activity {
private final static String LOG_TAG = "clear.zhang.tslights.TslightsActivity";
private ITslightsService tslightsService = null;
private TextView viewById=null;
int textnum = 60;
private ImageView imageViewred;
private ImageView imageViewgreen;
private ImageView imageViewyellow;
Handler handler = new Handler();
int i=0;
int red_time=8;
int red_init =1 ;
int green_time=10;
int green_init =1;
int yellow_time=3;
int yellow_init =1;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tslightsService = ITslightsService.Stub.asInterface(
ServiceManager.getService("tslights"));
viewById = (TextView)findViewById(R.id.tv_count);
imageViewred=(ImageView)findViewById(R.id.red);
imageViewgreen=(ImageView)findViewById(R.id.green);
imageViewyellow=(ImageView)findViewById(R.id.yellow);
viewById.setText(String.valueOf(textnum));
imageViewred.setImageDrawable(getResources().getDrawable(R.drawable.pred));
imageViewgreen.setImageDrawable(getResources().getDrawable(R.drawable.pgreen));
imageViewyellow.setImageDrawable(getResources().getDrawable(R.drawable.pyellow));
try {
red_init=tslightsService.getRed_init();
red_time=tslightsService.getRed_time();
green_init=tslightsService.getGreen_init();
green_time=tslightsService.getGreen_time();
yellow_init=tslightsService.getYellow_init();
yellow_time=tslightsService.getYellow_time();
} catch (RemoteException e) {
Log.e(LOG_TAG, "Remote Exception while reading value from freg service.");
}
Log.i(LOG_TAG, "Tslights Activity Created");
handler.postDelayed(runnable,1000);
}
Runnable runnable = new Runnable() {
@Override
public void run() {
i++;
if (i >= 0 && i <= green_time&&green_init==1) {
imageViewred.setVisibility(View.INVISIBLE);
imageViewgreen.setVisibility(View.VISIBLE);
imageViewyellow.setVisibility(View.INVISIBLE);
CountDownTimer timer1=new CountDownTimer(green_time*1000+500, 1000) {
public void onTick(long millisUntilFinished) {
int a= (int) (millisUntilFinished/1000);
viewById.setText(String.valueOf(a));
//viewById.setText(String.valueOf(millisUntilFinished / 1000));
}
public void onFinish() {
//LogUtil.i(TAG, "done!");
}
}.start();
try {
green_init=0;
tslightsService.setGreen_init(green_init);
yellow_init=1;
tslightsService.setYellow_init(yellow_init);
} catch (RemoteException e) {
Log.e(LOG_TAG, "Remote Exception while reading value from freg service.");
}
} else if (i >= green_time+1 && i <= green_time+yellow_time&&yellow_init==1) {
imageViewred.setVisibility(View.INVISIBLE);
imageViewgreen.setVisibility(View.INVISIBLE);
imageViewyellow.setVisibility(View.VISIBLE);
CountDownTimer timer2=new CountDownTimer(yellow_time*1000+500, 1000) {
public void onTick(long millisUntilFinished) {
int a= (int) (millisUntilFinished/1000);
viewById.setText(String.valueOf(a));
}
public void onFinish() {
//LogUtil.i(TAG, "done!");
}
}.start();
try {
yellow_init=0;
tslightsService.setYellow_init(yellow_init);
red_init=1;
tslightsService.setRed_init(red_init);
} catch (RemoteException e) {
Log.e(LOG_TAG, "Remote Exception while reading value from freg service.");
}
} else if (i >= green_time+yellow_time+1 && i <= red_time+green_time+yellow_time&&red_init==1) {
imageViewred.setVisibility(View.VISIBLE);
imageViewgreen.setVisibility(View.INVISIBLE);
imageViewyellow.setVisibility(View.INVISIBLE);
CountDownTimer timer3=new CountDownTimer(red_time*1000+500, 1000) {
public void onTick(long millisUntilFinished) {
int a= (int) (millisUntilFinished/1000);
viewById.setText(String.valueOf(a));
}
public void onFinish() {
//LogUtil.i(TAG, "done!");
}
}.start();
try {
red_init=0;
tslightsService.setRed_init(red_init);
green_init=1;
tslightsService.setGreen_init(green_init);
} catch (RemoteException e) {
Log.e(LOG_TAG, "Remote Exception while reading value from freg service.");
}
} else if (i > red_time+green_time+yellow_time) {
i = 0;
}
handler.postDelayed(this, 1000);
}
};
}
main.xml
各文件编写好后，进行编译和打包
最后，启动模拟器
注：若启动模拟器发现一直停留在开机动画页面的话，请执行make命令后，再重新启动模拟器。
附源码包链接：https://download.csdn.net/download/qq_40789901/12667732