Making the impossible possible

Because I was a beginner, I didn't figure out debug message where was showed. Finally,  I found a message.

Error Message: Application Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app's Info.plist file.

I found a solution for me is that:

Solution: 1. I open the info.plist. 2. Right-click and Add row. 3. Key App Transport Security Settings , Type Dict. 4. Then add a row again as a item. 5. Key NSAllowsArbitraryLoads, Type Boolean, Value True.

1 Input to the class as parameter

import json json_data = '{ 'id': 'jieyi', 'pwd': 'jieyi', 'sex': 'man', 'birthday': '2015/12/31', 'kids': [{ 'first_boy': 'Kids', 'first_girl': 'Lucy' }] }' class AccountInfo: def __init__(self, id, pwd, sex, bir_day, kids): self.id = id self.pwd = pwd self.sex = sex self.birth_day = bir_day self.kids = kids['kids'] a = AccountInfo(**json.loads(json_data).decode('utf-8')) print(a.sex) # output>> man print(a.kids) # output>> [{'first_boy': 'Kids', 'first_girl': 'Lucy'}]

2 Input to the class directly

import json json_data = '{ 'id': 'jieyi', 'pwd': 'jieyi', 'sex': 'man', 'birthday': '2015/12/31' }' class Account: def __init__(self, json_data): self.__dict__ = json.loads(json_data.decode('utf-8')) a = Acoount(json_data) print(a.id) # output>> jieyi print(a.pwd) # output>> jieyi print(a.sex) # output>> man

Conclusion

Then in the field called Log Tag regex You have to input this as below:

^(?!.*(MyTag)).*$

which means you don’t want any log which contains dalvivm or OpenGLRenderer. If You want add another word to ignore list just insert inside of regex

|word

For example:

^(?!.*(MyTag|word)).*$

As following the steps, you could filter the tags what you don't want to see.

BUT, there are still many logs because the system logs, the application logs, bla bla bla.... In any way, so many logs is still there.

Now you just want to see your application's log. You need to click Edit Filter Configuration.

Then you input your application package name as like

'com.my.app.practice'.

The first, you need to prepare three tools as below.

dex2jar: Tools to work with android .dex and java .class files

jd-gui: A tool for reverse engineering Android apk files

apktool: Java Decompiler is a tools to decompile and analyze Java 5 "byte code" and the later versions

Decompiler

You type to your console line.

>>> d2j-dex2jar.bat \classes.dex >>> dex2jar C:\xxx\classes.dex -> .\classes-dex2jar.jar

Then you can got the jar file.

import collections dic = collections.defaultdict.fromkeys( [num for num in range(5)], None) result>>> {'0': None, '1': None, '2': None, '3': None, '4': None}

First step

You need to add as below in build.gradle (Moudle: YOURMOUDLE).

dependencies { compile fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar') }

This one is outter all of class.

task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') { destinationDir file("$buildDir/native-libs") baseName 'native-libs' from fileTree(dir: 'libs', include: '**/*.so') into 'lib/' } tasks.withType(JavaCompile) { compileTask -> compileTask.dependsOn(nativeLibsToJar) }

Then your first step has finished!!

Second step

New a folder 'jnilibs' at MODULE/src/main.

The path image as like below

Module ├ src ├ main ├ jniLibs ├ armeabi | └ libcpu_jni.so ├ armeabi-v7a | └ libcpu_jni.so ├ mips | └ libcpu_jni.so └ x86 └ libcpu_jni.so

Then you can enjoy using it!!

Put them in libs

First step

The same as way one. You need to add something in build.gradle (Moudle: YOURMOUDLE).

android { sourceSets { main { jniLibs.srcDirs = ['libs'] } } }

You have already finished half of process!!!

Second step

You just put *.so file you prepared in the MOUDLE/libs/.

The path image as like below

Module ├ libs ├ armeabi | └ libcpu_jni.so ├ armeabi-v7a | └ libcpu_jni.so ├ mips | └ libcpu_jni.so └ x86 └ libcpu_jni.so

Just easy to import your *.so file.

How to use .so file's method

You just type a little code then you can declare the function.

// Register the function name as following in your libcpu_jni.so file. private static final native boolean readProcFile(String file, int[] format, String[] outStrings, long[] outLongs, float[] outFloats); // Load that libcpu_jni.so file from native library. static { try { System.loadLibrary("cpu_jni"); } catch (UnsatisfiedLinkError ule) { Log.e("LoadJniLib", "Error: Could not load native library: " + ule.getMessage()); } }

Call the native function.

readProcFile("/proc/stat", SYSTEM_CPU_FORMAT, null, sysCpu, null)

The "nameof" is creat in compiler time, not in running time.

What's kind of situation we're able to use "nameof"? For example, we're always using in checking variables are legal or illegal. When detecting an illegal variable, we throw the excpetion. As like below:

void LoadProduct(string productId) { if (productId == null) { throw new ArgumentNullException("productId")); } .... }