bcoder

c++ “duplicate symbol for architecture x86_64″错误

分类：C++, Others, Qt 阅读 (3,062) No Responses »

1月 182018

　　C++出现: 1 duplicate symbol for architecture x86_64可能的问题如下：

你可能在一个头文件中定义了一个变量或者函数，但是这个头文件被多个cpp文件include了
你可能把一个静态变量(static)定义了多次
你可能在一个cpp文件中将一个函数定义了多次

　　可以查看详细的错误信息，看看是哪个变量或者函数被重复定义了。

　　本人这此遇到此问题是因为把一个静态变量的定义放在头文件里了，应该放到cpp文件里就没问题了。

#ifndef MANAGERCONFIG_H
#define MANAGERCONFIG_H

#include <iostream>

#include "iniparser/iniparser.h"

class ManagerConfig
{
public:
    ManagerConfig();
    ~ManagerConfig();

    static ManagerConfig* getInstance();
    static void deleteInstance();

private:
    static ManagerConfig* m_instance;

private:
    dictionary* ini;

private:
    std::string mUserId;
    std::string mUserName;
    std::string mLoginToken;

public:
    std::string getUserId();
    std::string getUserName();
    std::string getLogintoken();

public:
    void setUserId(std::string userid);
    void setUserName(std::string username);
    void setLogintoken(std::string logintoken);
};

//这里定义了静态变量，所以出问题了
//ManagerConfig* ManagerConfig::m_instance = NULL;

const std::string INIFILE_NAME = "managerconfig.ini";

#endif // MANAGERCONFIG_H

#ifndef MANAGERCONFIG_H

#define MANAGERCONFIG_H

#include <iostream>

#include "iniparser/iniparser.h"

class ManagerConfig

{

public:

ManagerConfig();

~ManagerConfig();

static ManagerConfig* getInstance();

static void deleteInstance();

private:

static ManagerConfig* m_instance;

private:

dictionary* ini;

private:

std::string mUserId;

std::string mUserName;

std::string mLoginToken;

public:

std::string getUserId();

std::string getUserName();

std::string getLogintoken();

public:

void setUserId(std::string userid);

void setUserName(std::string username);

void setLogintoken(std::string logintoken);

};

//这里定义了静态变量，所以出问题了

//ManagerConfig* ManagerConfig::m_instance = NULL;

const std::string INIFILE_NAME = "managerconfig.ini";

#endif // MANAGERCONFIG_H

gradle打印依赖树

分类：Android, Java 阅读 (12,517) No Responses »

1月 132018

　　本文适用于OSX和Linux系统，Windows系统用户可用来参考

　　在Android Studio中进行了三方库的前期测试调研工作，然后要把工程转移到Android系统工程中，使用Android.mk进行编译，所有的三方jar包只能手动添加到工程中了。在使用Android Studio的dependency的时候除了显示添加到其中的三方库，三方库可能还会调用其他的依赖库，那怎么才能知道到底用了哪些库呢，只能使用gradle了。

　　在命令行cd到工程所在的根目录，然后使用如下命令打印as工程中的库的依赖关系，其中app为要查看的模块的名称

./gradlew app:dependencies

1	./gradlew app:dependencies

　　如果执行成功的话就会打印一大堆信息，其中一部分内容就是不同的gradle任务的类库依赖关系，类似如下形式：

+--- com.orhanobut:logger:2.1.1
+--- com.google.code.gson:gson:2.8.0
+--- com.android.support:appcompat-v7:25.4.0 (*)
+--- com.journeyapps:zxing-android-embedded:3.5.0
+--- com.google.zxing:core:3.3.0
+--- com.squareup.okhttp3:okhttp:3.9.0 (*)
+--- com.umeng.sdk:common:latest.integration -> 1.5.3
+--- com.umeng.sdk:analytics:latest.integration -> 7.5.3
+--- com.android.support:recyclerview-v7:25.4.0
|    +--- com.android.support:support-annotations:25.4.0 -> 23.1.0
|    +--- com.android.support:support-compat:25.4.0 (*)
|    \--- com.android.support:support-core-ui:25.4.0 (*)
+--- org.greenrobot:greendao:3.2.2
|    \--- org.greenrobot:greendao-api:3.2.2
+--- com.android.support:gridlayout-v7:25.4.0
|    +--- com.android.support:support-compat:25.4.0 (*)
|    \--- com.android.support:support-core-ui:25.4.0 (*)
+--- com.android.support:design:25.4.0
|    +--- com.android.support:support-v4:25.4.0 (*)
|    +--- com.android.support:appcompat-v7:25.4.0 (*)
|    +--- com.android.support:recyclerview-v7:25.4.0 (*)
|    \--- com.android.support:transition:25.4.0
|         +--- com.android.support:support-annotations:25.4.0 -> 23.1.0
|         \--- com.android.support:support-v4:25.4.0 (*)
+--- com.android.support:support-v4:25.4.0 (*)
+--- pub.devrel:easypermissions:0.3.0
|    \--- com.android.support:appcompat-v7:25.1.0 -> 25.4.0 (*)
+--- org.greenrobot:eventbus:3.1.0-RC
\--- com.android.support.constraint:constraint-layout:1.0.2
     \--- com.android.support.constraint:constraint-layout-solver:1.0.2

+--- com.orhanobut:logger:2.1.1

+--- com.google.code.gson:gson:2.8.0

+--- com.android.support:appcompat-v7:25.4.0 (*)

+--- com.journeyapps:zxing-android-embedded:3.5.0

+--- com.google.zxing:core:3.3.0

+--- com.squareup.okhttp3:okhttp:3.9.0 (*)

+--- com.umeng.sdk:common:latest.integration -> 1.5.3

+--- com.umeng.sdk:analytics:latest.integration -> 7.5.3

+--- com.android.support:recyclerview-v7:25.4.0

| +--- com.android.support:support-annotations:25.4.0 -> 23.1.0

| +--- com.android.support:support-compat:25.4.0 (*)

| \--- com.android.support:support-core-ui:25.4.0 (*)

+--- org.greenrobot:greendao:3.2.2

| \--- org.greenrobot:greendao-api:3.2.2

+--- com.android.support:gridlayout-v7:25.4.0

| +--- com.android.support:support-compat:25.4.0 (*)

| \--- com.android.support:support-core-ui:25.4.0 (*)

+--- com.android.support:design:25.4.0

| +--- com.android.support:support-v4:25.4.0 (*)

| +--- com.android.support:appcompat-v7:25.4.0 (*)

| +--- com.android.support:recyclerview-v7:25.4.0 (*)

| \--- com.android.support:transition:25.4.0

| +--- com.android.support:support-annotations:25.4.0 -> 23.1.0

| \--- com.android.support:support-v4:25.4.0 (*)

+--- com.android.support:support-v4:25.4.0 (*)

+--- pub.devrel:easypermissions:0.3.0

| \--- com.android.support:appcompat-v7:25.1.0 -> 25.4.0 (*)

+--- org.greenrobot:eventbus:3.1.0-RC

\--- com.android.support.constraint:constraint-layout:1.0.2

\--- com.android.support.constraint:constraint-layout-solver:1.0.2

已经下载的类库存在哪里？

　　默认情况下gradle下载的文件在用户目录下的.gradle目录中，可以通过如下命令进行该目录

cd ~/.gradle

1	cd ~/.gradle

　　然后通过find命令查找你想要的库就可以了，比如要查gson的jar包，可以用如下命令：

find ./ -name *gson*jar

1	find ./ -name gsonjar

LeakCanary入门教程

分类：Android, Java 阅读 (1,203) No Responses »

1月 122018

首先在gradle中添加库的依赖，如下：

dependencies {


    debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.3'
    releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.6.3'
    // Optional, if you use support library fragments:
    debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.3'
}

dependencies {

debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.6.3'

releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.6.3'

// Optional, if you use support library fragments:

debugImplementation 'com.squareup.leakcanary:leakcanary-support-fragment:1.6.3'

}

releaseImplementation依赖库是用于在release包中，只有LeakCanary的各种方法的壳，但是没有具体的实现，防止在给用户的release包中也进行内存检测操作。

然后新建一个Application类，并在此Application类的onCreate中加入以下代码

public class MusicApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();

        //如果已经在检测这个Application则return
        if(LeakCanary.isInAnalyzerProcess(this)){
            return;
        }

        LeakCanary.install(this);

        //你的Application的初始化代码
    }

}

public class MusicApplication extends Application {

@Override

public void onCreate() {

super.onCreate();

//如果已经在检测这个Application则return

if(LeakCanary.isInAnalyzerProcess(this)){

return;

}

LeakCanary.install(this);

//你的Application的初始化代码

}

打开一个Activity，在关闭的时候如果有内存泄漏，LeakCanary将会在通知栏显示图片，点击图标即可看到详细的内存泄漏报告，如下图所示：

Java中的Atomic类

分类：Android, Java, Java语言阅读 (1,794) No Responses »

1月 062018

Atomic类用于保证变量操作的原子性，先记录，有时间再进行研究 :-(

打包apk时出现Cannot recover key的错误

分类：Android, Java 阅读 (4,439) 已关闭评论

11月 252017

出现这种错误一般是输入的keystore的密钥有问题了

重新输入一下打包的密钥就可以了

ubuntu14.04编译Android4.4源码注意事项

分类：Android, Java 阅读 (2,757) No Responses »

11月 212017

需要安装的库(下载代码前)：

sudo apt-get install curl

sudo apt-get install git

需要安装的库（编译前）：

sudo apt-get install git git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev libc6-dev

sudo apt-get install lib32ncurses5-dev x11proto-core-dev libx11-dev

sudo apt-get install lib32z-dev libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown

sudo apt-get install lib32readline-gplv2-dev

sudo apt-get install libxml2-utils

repo sync只同步部分代码的方法

分类：Others, Others 阅读 (15,179) No Responses »

11月 172017

　　每次下载安卓源码都要花1天的多的时间，而且在公司下载几十个G也占用别的人网速，所以对于只关注部分代码的人，可以只同步某些项目，这样节省时间和带宽。
本文所说内容是以你repo init成功为基础的。
　　首先打开源码目录下的.repo目录，打开manifest.xml，里面是一个子项目列表，其中xml节点中的name属性为我们需要用的
比如下载platform/packages/apps/Bluetooth的命令如下：

~/bin/repo sync platform/packages/apps/Bluetooth

1	~/bin/repo sync platform/packages/apps/Bluetooth

　　有的时候这个manifest.xml并没有你想要的那个项目，你可以根据安卓官方的源码结构添加进去，比如下面几个就是我手动添加的：

<project path="external/bluetooth/bluedroid" name="platform/external/bluetooth/bluedroid" groups="pdk" />
<project path="external/bluetooth/bluez" name="platform/external/bluetooth/bluez" groups="pdk" />
<project path="external/bluetooth/glib" name="platform/external/bluetooth/glib" groups="pdk" />
<project path="external/bluetooth/hcidump" name="platform/external/bluetooth/hcidump" groups="pdk" />

　　另外如果你想同时下载多个项目也是支持的，在不同的项目后面加上空格分隔即可，如下：

~/bin/repo sync platform/external/bluetooth/bluedroid platform/external/bluetooth/bluez platform/external/bluetooth/glib platform/external/bluetooth/hcidump

1	~/bin/repo sync platform/external/bluetooth/bluedroid platform/external/bluetooth/bluez platform/external/bluetooth/glib platform/external/bluetooth/hcidump

　链接：

安卓官方源码库：https://android.googlesource.com/
清华镜像下载：https://mirrors.tuna.tsinghua.edu.cn/help/AOSP/

使用adb获取Android系统版本号

分类：Android, Android, Java, Operating System 阅读 (21,268) No Responses »

11月 142017

使用adb shell getprop即可获得Android系统的版本号，如下：

获取系统版本：adb shell getprop ro.build.version.release

获取系统api版本：adb shell getprop ro.build.version.sdk

获取系统版本：adb shell getprop ro.build.version.release

获取系统api版本：adb shell getprop ro.build.version.sdk

另外直接执行adb shell getprop还可以获得更多的系统属性，如下是我机器显示的结果：

[alsa.mixer.capture.headset]: [Capture]
[alsa.mixer.capture.master]: [Capture]
[alsa.mixer.playback.headset]: [Headphone]
[alsa.mixer.playback.master]: [Playback]
[alsa.mixer.playback.speaker]: [Playback]
[back_camera_name]: [adv7180_decoder]
[back_camera_orient]: [0]
[camera.disable_zsl_mode]: [1]
[dalvik.vm.dexopt-flags]: [m=y]
[dalvik.vm.heapgrowthlimit]: [64m]
[dalvik.vm.heapmaxfree]: [8m]
[dalvik.vm.heapminfree]: [512k]
[dalvik.vm.heapsize]: [384m]
[dalvik.vm.heapstartsize]: [8m]
[dalvik.vm.heaptargetutilization]: [0.75]
[dalvik.vm.jniopts]: [warnonly]
[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]
[debug.egl.hw]: [1]
[debug.force_rtl]: [0]
[debug.sf.enable_hgl]: [1]
[debug.sf.showfps]: [0]
[dev.bootcomplete]: [1]
[dhcp.wlan0.dns1]: [192.168.8.5]
[dhcp.wlan0.dns2]: [114.114.114.114]
[dhcp.wlan0.dns3]: []
[dhcp.wlan0.dns4]: []
[dhcp.wlan0.domain]: []
[dhcp.wlan0.gateway]: [192.168.23.1]
[dhcp.wlan0.ipaddress]: [192.168.23.100]
[dhcp.wlan0.leasetime]: [86400]
[dhcp.wlan0.mask]: [255.255.255.0]
[dhcp.wlan0.mtu]: []
[dhcp.wlan0.pid]: [1440]
[dhcp.wlan0.reason]: [REBOOT]
[dhcp.wlan0.result]: [ok]
[dhcp.wlan0.server]: [192.168.23.1]
[dhcp.wlan0.vendorInfo]: []
[front_camera_name]: [uvc]
[front_camera_orient]: [0]
[gsm.current.phone-type]: [1]
[gsm.network.type]: [Unknown]
[gsm.operator.alpha]: []
[gsm.operator.iso-country]: []
[gsm.operator.isroaming]: [false]
[gsm.operator.numeric]: []
[gsm.ril.delay]: [15]
[gsm.sim.state]: [NOT_READY]
[hw.backlight.dev]: [pwm-backlight.0]
[hw.bluetooth]: [0]
[hwc.enable_dither]: [1]
[hwc.stretch.filter]: [1]
[init.svc.adbd]: [running]
[init.svc.blueletd]: [running]
[init.svc.bootanim]: [stopped]
[init.svc.console]: [running]
[init.svc.debuggerd]: [running]
[init.svc.dhcpcd_wlan0]: [running]
[init.svc.drm]: [running]
[init.svc.healthd]: [running]
[init.svc.installd]: [running]
[init.svc.keystore]: [running]
[init.svc.magd]: [stopped]
[init.svc.mcu_server]: [running]
[init.svc.media]: [running]
[init.svc.netd]: [running]
[init.svc.ril-daemon]: [running]
[init.svc.sdcard]: [running]
[init.svc.servicemanager]: [running]
[init.svc.surfaceflinger]: [running]
[init.svc.tw8836]: [stopped]
[init.svc.ueventd]: [running]
[init.svc.vold]: [running]
[init.svc.watchdogd]: [running]
[init.svc.wifi_mac]: [stopped]
[init.svc.wpa_supplicant]: [running]
[init.svc.zygote]: [running]
[media.omxgm.enable-player]: [1]
[media.omxgm.enable-record]: [1]
[media.omxgm.enable-scan]: [1]
[media.wfd.video-bitrate]: [adaptive]
[net.bt.name]: [Android]
[net.change]: [net.dns2]
[net.dns1]: [192.168.8.5]
[net.dns2]: [114.114.114.114]
[net.hostname]: [android-4e5bb95fd128e923]
[net.qtaguid_enabled]: [1]
[net.tcp.buffersize.default]: [4096,87380,110208,4096,16384,110208]
[net.tcp.buffersize.edge]: [4093,26280,35040,4096,16384,35040]
[net.tcp.buffersize.ethernet]: [524288,2097152,4194304,524288,2097152,4194304]
[net.tcp.buffersize.evdo]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.gprs]: [4092,8760,11680,4096,8760,11680]
[net.tcp.buffersize.hsdpa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.hspa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.hspap]: [4094,87380,1220608,4096,16384,1220608]
[net.tcp.buffersize.hsupa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.lte]: [524288,1048576,2097152,262144,524288,1048576]
[net.tcp.buffersize.umts]: [4094,87380,110208,4096,16384,110208]
[net.tcp.buffersize.wifi]: [524288,1048576,2097152,262144,524288,1048576]
[persist.sampling_profiler]: [1]
[persist.sys.country]: [CN]
[persist.sys.dalvik.vm.lib]: [libdvm.so]
[persist.sys.language]: [zh]
[persist.sys.localevar]: []
[persist.sys.profiler_ms]: [0]
[persist.sys.usb.config]: [mtp,adb]
[ro.FSL_AAC_PARSER]: [1]
[ro.FSL_ASF_PARSER]: [0]
[ro.FSL_AVI_PARSER]: [1]
[ro.FSL_FLAC_PARSER]: [1]
[ro.FSL_FLV_PARSER]: [1]
[ro.FSL_MKV_PARSER]: [1]
[ro.FSL_MPG2_PARSER]: [1]
[ro.FSL_REAL_PARSER]: [0]
[ro.adb.secure]: [1]
[ro.allow.mock.location]: [1]
[ro.baseband]: [unknown]
[ro.board.platform]: [imx6]
[ro.boot.console]: [ttymxc3]
[ro.boot.hardware]: [freescale]
[ro.boot.selinux]: [disabled]
[ro.boot.serialno]: [0a05a1d4e6b61f90]
[ro.bootloader]: [unknown]
[ro.bootmode]: [unknown]
[ro.build.characteristics]: [tablet]
[ro.build.date.utc]: [1508731143]
[ro.build.date]: [2017年 10月 23日 星期一 11:59:03 CST]
[ro.build.description]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]
[ro.build.display.id]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]
[ro.build.fingerprint]: [Freescale/sabreauto_6q/sabreauto_6q:4.4.3/2.0.0-rc2/20150123:eng/dev-keys]
[ro.build.host]: [chinatsp]
[ro.build.id]: [2.0.0-rc2]
[ro.build.product]: [sabreauto_6q]
[ro.build.tags]: [dev-keys]
[ro.build.type]: [eng]
[ro.build.user]: [xuganggen]
[ro.build.version.codename]: [REL]
[ro.build.version.incremental]: [20150123]
[ro.build.version.release]: [4.4.3]
[ro.build.version.sdk]: [19]
[ro.carrier]: [unknown]
[ro.config.alarm_alert]: [Alarm_Classic.ogg]
[ro.config.notification_sound]: [OnTheHunt.ogg]
[ro.crypto.state]: [unencrypted]
[ro.debuggable]: [1]
[ro.factorytest]: [0]
[ro.hardware.lightsensor]: [/sys/class/i2c-dev/i2c-1/device/1-0044/]
[ro.hardware]: [freescale]
[ro.kernel.android.checkjni]: [1]
[ro.lightsensor.threshold]: [20]
[ro.opengles.version]: [196608]
[ro.product.board]: [SABREAUTO]
[ro.product.brand]: [Freescale]
[ro.product.cpu.abi2]: [armeabi]
[ro.product.cpu.abi]: [armeabi-v7a]
[ro.product.device]: [sabreauto_6q]
[ro.product.locale.language]: [en]
[ro.product.locale.region]: [US]
[ro.product.manufacturer]: [Freescale]
[ro.product.model]: [SABREAUTO-MX6Q]
[ro.product.name]: [sabreauto_6q]
[ro.revision]: [0]
[ro.ril.wake_lock_timeout]: [300]
[ro.runtime.firstboot]: [86414407]
[ro.secure]: [0]
[ro.serialno]: [0a05a1d4e6b61f90]
[ro.sf.hwrotation]: [0]
[ro.sf.lcd_density]: [160]
[ro.tether.denied]: [false]
[ro.wifi.channels]: []
[ro.zygote.disable_gl_preload]: [true]
[rw.VIDEO_RENDER_NAME]: [video_render.surface]
[service.bootanim.exit]: [1]
[sys.boot_completed]: [1]
[sys.emulated.battery]: [1]
[sys.interactive]: [active]
[sys.settings_global_version]: [2]
[sys.sysctl.extra_free_kbytes]: [16200]
[sys.usb.config]: [mtp,adb]
[sys.usb.state]: [mtp,adb]
[system_init.startsurfaceflinger]: [0]
[vold.post_fs_data_done]: [1]
[wifi.ap.interface]: [wlan0]
[wifi.interface]: [wlan0]
[wlan.driver.status]: [ok]
[wlan.interface]: [wlan0]

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[alsa.mixer.capture.headset]: [Capture]

[alsa.mixer.capture.master]: [Capture]

[alsa.mixer.playback.headset]: [Headphone]

[alsa.mixer.playback.master]: [Playback]

[alsa.mixer.playback.speaker]: [Playback]

[back_camera_name]: [adv7180_decoder]

[back_camera_orient]: [0]

[camera.disable_zsl_mode]: [1]

[dalvik.vm.dexopt-flags]: [m=y]

[dalvik.vm.heapgrowthlimit]: [64m]

[dalvik.vm.heapmaxfree]: [8m]

[dalvik.vm.heapminfree]: [512k]

[dalvik.vm.heapsize]: [384m]

[dalvik.vm.heapstartsize]: [8m]

[dalvik.vm.heaptargetutilization]: [0.75]

[dalvik.vm.jniopts]: [warnonly]

[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]

[debug.egl.hw]: [1]

[debug.force_rtl]: [0]

[debug.sf.enable_hgl]: [1]

[debug.sf.showfps]: [0]

[dev.bootcomplete]: [1]

[dhcp.wlan0.dns1]: [192.168.8.5]

[dhcp.wlan0.dns2]: [114.114.114.114]

[dhcp.wlan0.dns3]: []

[dhcp.wlan0.dns4]: []

[dhcp.wlan0.domain]: []

[dhcp.wlan0.gateway]: [192.168.23.1]

[dhcp.wlan0.ipaddress]: [192.168.23.100]

[dhcp.wlan0.leasetime]: [86400]

[dhcp.wlan0.mask]: [255.255.255.0]

[dhcp.wlan0.mtu]: []

[dhcp.wlan0.pid]: [1440]

[dhcp.wlan0.reason]: [REBOOT]

[dhcp.wlan0.result]: [ok]

[dhcp.wlan0.server]: [192.168.23.1]

[dhcp.wlan0.vendorInfo]: []

[front_camera_name]: [uvc]

[front_camera_orient]: [0]

[gsm.current.phone-type]: [1]

[gsm.network.type]: [Unknown]

[gsm.operator.alpha]: []

[gsm.operator.iso-country]: []

[gsm.operator.isroaming]: [false]

[gsm.operator.numeric]: []

[gsm.ril.delay]: [15]

[gsm.sim.state]: [NOT_READY]

[hw.backlight.dev]: [pwm-backlight.0]

[hw.bluetooth]: [0]

[hwc.enable_dither]: [1]

[hwc.stretch.filter]: [1]

[init.svc.adbd]: [running]

[init.svc.blueletd]: [running]

[init.svc.bootanim]: [stopped]

[init.svc.console]: [running]

[init.svc.debuggerd]: [running]

[init.svc.dhcpcd_wlan0]: [running]

[init.svc.drm]: [running]

[init.svc.healthd]: [running]

[init.svc.installd]: [running]

[init.svc.keystore]: [running]

[init.svc.magd]: [stopped]

[init.svc.mcu_server]: [running]

[init.svc.media]: [running]

[init.svc.netd]: [running]

[init.svc.ril-daemon]: [running]

[init.svc.sdcard]: [running]

[init.svc.servicemanager]: [running]

[init.svc.surfaceflinger]: [running]

[init.svc.tw8836]: [stopped]

[init.svc.ueventd]: [running]

[init.svc.vold]: [running]

[init.svc.watchdogd]: [running]

[init.svc.wifi_mac]: [stopped]

[init.svc.wpa_supplicant]: [running]

[init.svc.zygote]: [running]

[media.omxgm.enable-player]: [1]

[media.omxgm.enable-record]: [1]

[media.omxgm.enable-scan]: [1]

[media.wfd.video-bitrate]: [adaptive]

[net.bt.name]: [Android]

[net.change]: [net.dns2]

[net.dns1]: [192.168.8.5]

[net.dns2]: [114.114.114.114]

[net.hostname]: [android-4e5bb95fd128e923]

[net.qtaguid_enabled]: [1]

[net.tcp.buffersize.default]: [4096,87380,110208,4096,16384,110208]

[net.tcp.buffersize.edge]: [4093,26280,35040,4096,16384,35040]

[net.tcp.buffersize.ethernet]: [524288,2097152,4194304,524288,2097152,4194304]

[net.tcp.buffersize.evdo]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.gprs]: [4092,8760,11680,4096,8760,11680]

[net.tcp.buffersize.hsdpa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.hspa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.hspap]: [4094,87380,1220608,4096,16384,1220608]

[net.tcp.buffersize.hsupa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.lte]: [524288,1048576,2097152,262144,524288,1048576]

[net.tcp.buffersize.umts]: [4094,87380,110208,4096,16384,110208]

[net.tcp.buffersize.wifi]: [524288,1048576,2097152,262144,524288,1048576]

[persist.sampling_profiler]: [1]

[persist.sys.country]: [CN]

[persist.sys.dalvik.vm.lib]: [libdvm.so]

[persist.sys.language]: [zh]

[persist.sys.localevar]: []

[persist.sys.profiler_ms]: [0]

[persist.sys.usb.config]: [mtp,adb]

[ro.FSL_AAC_PARSER]: [1]

[ro.FSL_ASF_PARSER]: [0]

[ro.FSL_AVI_PARSER]: [1]

[ro.FSL_FLAC_PARSER]: [1]

[ro.FSL_FLV_PARSER]: [1]

[ro.FSL_MKV_PARSER]: [1]

[ro.FSL_MPG2_PARSER]: [1]

[ro.FSL_REAL_PARSER]: [0]

[ro.adb.secure]: [1]

[ro.allow.mock.location]: [1]

[ro.baseband]: [unknown]

[ro.board.platform]: [imx6]

[ro.boot.console]: [ttymxc3]

[ro.boot.hardware]: [freescale]

[ro.boot.selinux]: [disabled]

[ro.boot.serialno]: [0a05a1d4e6b61f90]

[ro.bootloader]: [unknown]

[ro.bootmode]: [unknown]

[ro.build.characteristics]: [tablet]

[ro.build.date.utc]: [1508731143]

[ro.build.date]: [2017年 10月 23日星期一 11:59:03 CST]

[ro.build.description]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]

[ro.build.display.id]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]

[ro.build.fingerprint]: [Freescale/sabreauto_6q/sabreauto_6q:4.4.3/2.0.0-rc2/20150123:eng/dev-keys]

[ro.build.host]: [chinatsp]

[ro.build.id]: [2.0.0-rc2]

[ro.build.product]: [sabreauto_6q]

[ro.build.tags]: [dev-keys]

[ro.build.type]: [eng]

[ro.build.user]: [xuganggen]

[ro.build.version.codename]: [REL]

[ro.build.version.incremental]: [20150123]

[ro.build.version.release]: [4.4.3]

[ro.build.version.sdk]: [19]

[ro.carrier]: [unknown]

[ro.config.alarm_alert]: [Alarm_Classic.ogg]

[ro.config.notification_sound]: [OnTheHunt.ogg]

[ro.crypto.state]: [unencrypted]

[ro.debuggable]: [1]

[ro.factorytest]: [0]

[ro.hardware.lightsensor]: [/sys/class/i2c-dev/i2c-1/device/1-0044/]

[ro.hardware]: [freescale]

[ro.kernel.android.checkjni]: [1]

[ro.lightsensor.threshold]: [20]

[ro.opengles.version]: [196608]

[ro.product.board]: [SABREAUTO]

[ro.product.brand]: [Freescale]

[ro.product.cpu.abi2]: [armeabi]

[ro.product.cpu.abi]: [armeabi-v7a]

[ro.product.device]: [sabreauto_6q]

[ro.product.locale.language]: [en]

[ro.product.locale.region]: [US]

[ro.product.manufacturer]: [Freescale]

[ro.product.model]: [SABREAUTO-MX6Q]

[ro.product.name]: [sabreauto_6q]

[ro.revision]: [0]

[ro.ril.wake_lock_timeout]: [300]

[ro.runtime.firstboot]: [86414407]

[ro.secure]: [0]

[ro.serialno]: [0a05a1d4e6b61f90]

[ro.sf.hwrotation]: [0]

[ro.sf.lcd_density]: [160]

[ro.tether.denied]: [false]

[ro.wifi.channels]: []

[ro.zygote.disable_gl_preload]: [true]

[rw.VIDEO_RENDER_NAME]: [video_render.surface]

[service.bootanim.exit]: [1]

[sys.boot_completed]: [1]

[sys.emulated.battery]: [1]

[sys.interactive]: [active]

[sys.settings_global_version]: [2]

[sys.sysctl.extra_free_kbytes]: [16200]

[sys.usb.config]: [mtp,adb]

[sys.usb.state]: [mtp,adb]

[system_init.startsurfaceflinger]: [0]

[vold.post_fs_data_done]: [1]

[wifi.ap.interface]: [wlan0]

[wifi.interface]: [wlan0]

[wlan.driver.status]: [ok]

[wlan.interface]: [wlan0]

sqlite实现树型结构的查询

分类：Database, Sqlite 阅读 (2,633) No Responses »

10月 312017

此方法不可用！！！

使用RowID

select id,bname,parentid,1 as Level from boxes where parentid=0 
union all 
select a.id,a.bname,a.parentid,c.RowID as Level from boxes a 
inner join boxes b on a.parentid=b.id 
inner join 
(
      select parentid from boxes group by parentid
) c on a.parentid=c.parentid

select id,bname,parentid,1 as Level from boxes where parentid=0

union all

select a.id,a.bname,a.parentid,c.RowID as Level from boxes a

inner join boxes b on a.parentid=b.id

inner join

(

select parentid from boxes group by parentid

) c on a.parentid=c.parentid

Java实现回形遍历的代码

分类：Java, Java语言阅读 (1,958) No Responses »

10月 102017

本来以为这样的回形是有规律可循的，但是找了好长时间没找到，看来只能用遍历了。

x,y的使用有些乱，读者自己理一下吧

    private String huiXingBianLi(){
        final int FLAG_RIGHT = 0;
        final int FLAG_DOWN = 1;
        final int FLAG_LEFT = 2;
        final int FLAG_UP = 3;

        String resultStr = "";

        int flag = FLAG_RIGHT;
        final int countx = 10;
        final int county = 11;
        int x = 0, y = 0;
        int minx = 0, maxx = county - 1, miny = 1, maxy = countx - 1;
        int[][] result = new int[countx][county];

        int i = 0;
        while(i < countx * county){
            result[y][x] = ++i;

            if(flag == FLAG_RIGHT){
                if(x >= maxx){
                    maxx--;
                    y++;
                    flag = FLAG_DOWN;
                    continue;
                }else{
                    x++;
                }
            }

            if(flag == FLAG_DOWN){
                if(y >= maxy){
                    maxy--;
                    x--;
                    flag = FLAG_LEFT;
                    continue;
                }else{
                    y++;
                }
            }

            if(flag == FLAG_LEFT){
                if(x <= minx){
                    minx++;
                    y--;
                    flag = FLAG_UP;
                    continue;
                }else{
                    x--;
                }
            }

            if(flag == FLAG_UP){
                if(y <= miny){
                    miny++;
                    x++;
                    flag = FLAG_RIGHT;
                    continue;
                }else{
                    y--;
                }
            }
        }

        resultStr = "";
        for(int i1=0; i1 < countx ; i1++){
            for(int j1 = 0; j1 < county ; j1++){
                if(j1 == 0){
                    resultStr += String.format("   %03d", result[i1][j1]);
                }else {
                    resultStr += "..." + String.format("%03d", result[i1][j1]);
                }
            }

            resultStr += "\n";
        }

        return resultStr;
    }

private String huiXingBianLi(){

final int FLAG_RIGHT = 0;

final int FLAG_DOWN = 1;

final int FLAG_LEFT = 2;

final int FLAG_UP = 3;

String resultStr = "";

int flag = FLAG_RIGHT;

final int countx = 10;

final int county = 11;

int x = 0, y = 0;

int minx = 0, maxx = county - 1, miny = 1, maxy = countx - 1;

int[][] result = new int[countx][county];

int i = 0;

while(i < countx * county){

result[y][x] = ++i;

if(flag == FLAG_RIGHT){

if(x >= maxx){

maxx--;

y++;

flag = FLAG_DOWN;

continue;

}else{

x++;

}

if(flag == FLAG_DOWN){

if(y >= maxy){

maxy--;

x--;

flag = FLAG_LEFT;

continue;

}else{

y++;

}

if(flag == FLAG_LEFT){

if(x <= minx){

minx++;

y--;

flag = FLAG_UP;

continue;

}else{

x--;

}

if(flag == FLAG_UP){

if(y <= miny){

miny++;

x++;

flag = FLAG_RIGHT;

continue;

}else{

y--;

}

resultStr = "";

for(int i1=0; i1 < countx ; i1++){

for(int j1 = 0; j1 < county ; j1++){

if(j1 == 0){

resultStr += String.format(" %03d", result[i1][j1]);

}else {

resultStr += "..." + String.format("%03d", result[i1][j1]);

}

resultStr += "\n";

}

return resultStr;

}

结果展示：

   001...002...003...004...005...006...007...008...009...010...011
   038...039...040...041...042...043...044...045...046...047...012
   037...068...069...070...071...072...073...074...075...048...013
   036...067...090...091...092...093...094...095...076...049...014
   035...066...089...104...105...106...107...096...077...050...015
   034...065...088...103...110...109...108...097...078...051...016
   033...064...087...102...101...100...099...098...079...052...017
   032...063...086...085...084...083...082...081...080...053...018
   031...062...061...060...059...058...057...056...055...054...019
   030...029...028...027...026...025...024...023...022...021...020

001...002...003...004...005...006...007...008...009...010...011

038...039...040...041...042...043...044...045...046...047...012

037...068...069...070...071...072...073...074...075...048...013

036...067...090...091...092...093...094...095...076...049...014

035...066...089...104...105...106...107...096...077...050...015

034...065...088...103...110...109...108...097...078...051...016

033...064...087...102...101...100...099...098...079...052...017

032...063...086...085...084...083...082...081...080...053...018

031...062...061...060...059...058...057...056...055...054...019

030...029...028...027...026...025...024...023...022...021...020

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