Android 驱动测试程序H-M-S 6

今天把hook状态的值进行了读取,并且往上传递.

步骤如下:

<1> : 新建一个android应用工程,然后在工程目录下新建一个jni目录,拷贝以前开发的onload.h和onload.cpp文件,然后自行新建Android.mk,Application.mk脚本文件,然后新建getHook.cpp;

getHook.cpp内容如下:

#include<jni.h>
#include<fcntl.h>
#include<stdio.h>
#include<android/log.h>
#include<stdlib.h>
#include "onload.h"#define TAG "READ_HOOK"
#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO,TAG,__VA_ARGS__))
#define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN,TAG,__VA_ARGS__))
#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR,TAG,__VA_ARGS__))#define DEVICE_NAME "/sys/class/hostpower/hpower/hook"
#define PACKAGE_NAME "org/HookClass"namespace android {bool getHookStatus() {int fd = -1;char* val;char buf[3];fd = open(DEVICE_NAME, O_RDWR);if (fd == -1) {LOGI("failed to open device %s.\n", DEVICE_NAME);return -1;}read(fd, buf, 4);LOGI("read value : %s\n", buf);close(fd);LOGI("read value : %c\n", buf[2]);if (buf[2] == '1') {return true;} else {return false;}}int getHookData() {int fd = -1;char* val;char buf[3];fd = open(DEVICE_NAME, O_RDWR);if (fd == -1) {LOGI("failed to open device %s.\n", DEVICE_NAME);return -1;}read(fd, buf, 4);LOGI("read value : %s\n", buf);close(fd);LOGI("read value : %c\n", buf[2]);if (buf[2] == '1') {return 1;} else {return 0;}}}using namespace android;static const JNINativeMethod method_table[] = {{ "org_getHookStatus", "()Z", (void*) getHookStatus }, { "org_getHookData","()I", (void*) getHookData }};int register_android_jni_demo_android(JNIEnv *env) {return jniRegisterNativeMethods(env, PACKAGE_NAME, method_table,sizeof(method_table) / sizeof(method_table[0]));}

Android.mk文件内容:

LOCAL_PATH:=$(call my-dir)
include $(CLEAR_VARS)LOCAL_MODULE:=gethooklib
LOCAL_SRC_FILES:=onload.cpp getHook.cpp
LOCAL_SHARED_LIBRARY := libnativehelper liblog
LOCAL_LDLIBS:=-lloginclude $(BUILD_SHARED_LIBRARY)

<2> : 新建一个与jni相关接口的类:HookClass.java:

package org;public class HookClass {static {System.loadLibrary("gethooklib");}public HookClass() {}public native boolean org_getHookStatus();public native int org_getHookData();}

<3> : 新建一个getHook.cpp的文件:

#include<jni.h>
#include<fcntl.h>
#include<stdio.h>
#include<android/log.h>
#include<stdlib.h>
#include "onload.h"#define TAG "READ_HOOK"
#define LOGI(...) ((void)__android_log_print(ANDROID_LOG_INFO,TAG,__VA_ARGS__))
#define LOGW(...) ((void)__android_log_print(ANDROID_LOG_WARN,TAG,__VA_ARGS__))
#define LOGE(...) ((void)__android_log_print(ANDROID_LOG_ERROR,TAG,__VA_ARGS__))#define DEVICE_NAME "/sys/class/hostpower/hpower/hook"
#define PACKAGE_NAME "org/HookClass"namespace android {bool getHookStatus() {int fd = -1;char* val;char buf[3];fd = open(DEVICE_NAME, O_RDWR);if (fd == -1) {LOGI("failed to open device %s.\n", DEVICE_NAME);return -1;}read(fd, buf, 4);LOGI("read value : %s\n", buf);close(fd);LOGI("read value : %c\n", buf[2]);if (buf[2] == '1') {return true;} else {return false;}}int getHookData() {int fd = -1;char* val;char buf[3];fd = open(DEVICE_NAME, O_RDWR);if (fd == -1) {LOGI("failed to open device %s.\n", DEVICE_NAME);return -1;}read(fd, buf, 4);LOGI("read value : %s\n", buf);close(fd);LOGI("read value : %c\n", buf[2]);if (buf[2] == '1') {return 1;} else {return 0;}}}using namespace android;static const JNINativeMethod method_table[] = {{ "org_getHookStatus", "()Z", (void*) getHookStatus }, { "org_getHookData","()I", (void*) getHookData }};int register_android_jni_demo_android(JNIEnv *env) {return jniRegisterNativeMethods(env, PACKAGE_NAME, method_table,sizeof(method_table) / sizeof(method_table[0]));}

<4> : 应用工程:

package com.example.androidgethookdemo;import org.HookClass;import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;public class MainActivity extends Activity implements OnClickListener {private Button mBtn;private HookClass mHook;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mBtn = (Button) findViewById(R.id.show);mBtn.setOnClickListener(this);mHook = new HookClass();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubint idn = arg0.getId();switch (idn) {case R.id.show:if (mHook.org_getHookStatus()) {Toast.makeText(this,"hook status : press !\nhook status value : "+ mHook.org_getHookData(), Toast.LENGTH_SHORT).show();} else {Toast.makeText(this,"hook status : release !\nhook status value : "+ mHook.org_getHookData(), Toast.LENGTH_SHORT).show();}break;}}}

<5> : ndk-build以后,看看结果吧... ...

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