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Android开发使用js在webview中模拟登录

分类：Android, Java 阅读 (1,408) 已关闭评论

2月 172022

1.首先要设置setJavaScriptEnabled为true，使用webview支持js

2.使用js脚本的document.getElementById找到用户名和密码输入框，并模拟输入用户名和密码的内容，然后找到提交按钮并模拟click点击。注意：js必须写成一个函数(示例代码中的jsLogin函数)运行。

    private void initViews() {
        mWebView = mRootView.findViewById(R.id.webView);
        //支持javascript
        mWebView.getSettings().setJavaScriptEnabled(true);
        mWebView.getSettings().setDomStorageEnabled(true);
        // 设置可以支持缩放
//        mWebView.getSettings().setSupportZoom(true);
        // 设置出现缩放工具
//        mWebView.getSettings().setBuiltInZoomControls(true);
        //扩大比例的缩放
        mWebView.getSettings().setUseWideViewPort(true);
        //自适应屏幕
        mWebView.getSettings().setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);
        mWebView.getSettings().setLoadWithOverviewMode(true);


        //如果不设置WebViewClient，请求会跳转系统浏览器
        mWebView.setWebViewClient(new ZlWebViewClient() {

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {

                return false;
            }

            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {

                return false;
            }

            @Override
            public void onPageFinished(final WebView view, String url) {
                super.onPageFinished(view, url);
                mCurrentUrl = view.getUrl();
                if(mServerConfig != null) {
                    view.loadUrl("javascript:function jsLogin(){document.getElementById('username').value='admin'; "
                            + "document.getElementById('password').value='admin'; "
                            + "document.getElementById('btnsubmit').click();}");
                    view.loadUrl("javascript:jsLogin()");
                }
            }
        });
    }

private void initViews() {

mWebView = mRootView.findViewById(R.id.webView);

//支持javascript

mWebView.getSettings().setJavaScriptEnabled(true);

mWebView.getSettings().setDomStorageEnabled(true);

// 设置可以支持缩放

// mWebView.getSettings().setSupportZoom(true);

// 设置出现缩放工具

// mWebView.getSettings().setBuiltInZoomControls(true);

//扩大比例的缩放

mWebView.getSettings().setUseWideViewPort(true);

//自适应屏幕

mWebView.getSettings().setLayoutAlgorithm(WebSettings.LayoutAlgorithm.SINGLE_COLUMN);

mWebView.getSettings().setLoadWithOverviewMode(true);

//如果不设置WebViewClient，请求会跳转系统浏览器

mWebView.setWebViewClient(new ZlWebViewClient() {

@Override

public boolean shouldOverrideUrlLoading(WebView view, String url) {

return false;

}

@Override

public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {

return false;

}

@Override

public void onPageFinished(final WebView view, String url) {

super.onPageFinished(view, url);

mCurrentUrl = view.getUrl();

if(mServerConfig != null) {

view.loadUrl("javascript:function jsLogin(){document.getElementById('username').value='admin'; "

+ "document.getElementById('password').value='admin'; "

+ "document.getElementById('btnsubmit').click();}");

view.loadUrl("javascript:jsLogin()");

}

});

}

Android实现TextView搜索关键字高亮显示

分类：Android, Java 阅读 (1,138) 已关闭评论

3月 222021

效果图如下：

关键字搜索不区分大小写，TextView换成EditText也同样适用。

Activity部局代码如下：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <EditText
        android:id="@+id/edtKeyword"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:ems="10"
        android:inputType="textPersonName"
        app:layout_constraintEnd_toStartOf="@+id/btnSearch"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/btnSearch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:text="搜索"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/tvContent"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginStart="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginBottom="8dp"
        android:ems="10"
        android:gravity="start|top"
        android:inputType="textMultiLine"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/edtKeyword" />

</androidx.constraintlayout.widget.ConstraintLayout>

<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:app="http://schemas.android.com/apk/res-auto"

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity">

<EditText

android:id="@+id/edtKeyword"

android:layout_width="0dp"

android:layout_height="wrap_content"

android:layout_marginStart="8dp"

android:layout_marginLeft="8dp"

android:layout_marginTop="8dp"

android:layout_marginEnd="8dp"

android:layout_marginRight="8dp"

android:ems="10"

android:inputType="textPersonName"

app:layout_constraintEnd_toStartOf="@+id/btnSearch"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toTopOf="parent" />

<Button

android:id="@+id/btnSearch"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_marginTop="8dp"

android:layout_marginEnd="8dp"

android:layout_marginRight="8dp"

android:text="搜索"

app:layout_constraintEnd_toEndOf="parent"

app:layout_constraintTop_toTopOf="parent" />

<TextView

android:id="@+id/tvContent"

android:layout_width="0dp"

android:layout_height="0dp"

android:layout_marginStart="8dp"

android:layout_marginLeft="8dp"

android:layout_marginTop="8dp"

android:layout_marginEnd="8dp"

android:layout_marginRight="8dp"

android:layout_marginBottom="8dp"

android:ems="10"

android:gravity="start|top"

android:inputType="textMultiLine"

app:layout_constraintBottom_toBottomOf="parent"

app:layout_constraintEnd_toEndOf="parent"

app:layout_constraintStart_toStartOf="parent"

app:layout_constraintTop_toBottomOf="@+id/edtKeyword" />

</androidx.constraintlayout.widget.ConstraintLayout>

Activity代码如下：

package com.example.highlightstrapp;


import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {
    private EditText edtKeyword;
    private TextView tvContent;
    private Button btnSearch;

    private String mContent = "　　There are moments in life when you miss someone so much that you " +
            "just want to pick them from your dreams and hug them for real! Dream what you want to " +
            "dream;go where you want to go;be what you want to be,because you have only one life " +
            "and one chance to do all the things you want to do.\n" +
            "\n" +
            "　　May you have enough happiness to make you sweet,enough trials to make you strong," +
            "enough sorrow to keep you human,enough hope to make you happy? Always put yourself " +
            "in others’shoes.If you feel that it hurts you,it probably hurts the other person, too.\n" +
            "\n" +
            "　　The happiest of people don’t necessarily have the best of everything;they just " +
            "make the most of everything that comes along their way.Happiness lies for those who " +
            "cry,those who hurt, those who have searched,and those who have tried,for only they " +
            "can appreciate the importance of people";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initViews();
        initEvents();
    }

    private void initEvents() {
        btnSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                hightStr(edtKeyword.getText().toString(), mContent);
            }
        });
    }

    private void initViews() {
        tvContent = findViewById(R.id.tvContent);
        edtKeyword = findViewById(R.id.edtKeyword);
        btnSearch = findViewById(R.id.btnSearch);
    }

    public void hightStr(String hlStr, String srcString){
        tvContent.setText("");
        String hlLower = hlStr.toLowerCase();
        int lastEnd = 0;
        SpannableString spannableString = new SpannableString(srcString);
        for(int i = 0; i <= srcString.length() - hlStr.length(); i++){
            if(srcString.substring(i, i + hlStr.length()).toLowerCase().equals(hlLower)){
                spannableString.setSpan(new ForegroundColorSpan(Color.RED), i, i + hlStr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
                spannableString.setSpan(new BackgroundColorSpan(Color.YELLOW), i, i + hlStr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            }
        }

        tvContent.append(spannableString);
    }

}

package com.example.highlightstrapp;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.text.SpannableString;

import android.text.Spanned;

import android.text.style.BackgroundColorSpan;

import android.text.style.ForegroundColorSpan;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends Activity {

private EditText edtKeyword;

private TextView tvContent;

private Button btnSearch;

private String mContent = "　　There are moments in life when you miss someone so much that you " +

"just want to pick them from your dreams and hug them for real! Dream what you want to " +

"dream;go where you want to go;be what you want to be,because you have only one life " +

"and one chance to do all the things you want to do.\n" +

"\n" +

"　　May you have enough happiness to make you sweet,enough trials to make you strong," +

"enough sorrow to keep you human,enough hope to make you happy? Always put yourself " +

"in others’shoes.If you feel that it hurts you,it probably hurts the other person, too.\n" +

"\n" +

"　　The happiest of people don’t necessarily have the best of everything;they just " +

"make the most of everything that comes along their way.Happiness lies for those who " +

"cry,those who hurt, those who have searched,and those who have tried,for only they " +

"can appreciate the importance of people";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initViews();

initEvents();

}

private void initEvents() {

btnSearch.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

hightStr(edtKeyword.getText().toString(), mContent);

}

});

}

private void initViews() {

tvContent = findViewById(R.id.tvContent);

edtKeyword = findViewById(R.id.edtKeyword);

btnSearch = findViewById(R.id.btnSearch);

}

public void hightStr(String hlStr, String srcString){

tvContent.setText("");

String hlLower = hlStr.toLowerCase();

int lastEnd = 0;

SpannableString spannableString = new SpannableString(srcString);

for(int i = 0; i <= srcString.length() - hlStr.length(); i++){

if(srcString.substring(i, i + hlStr.length()).toLowerCase().equals(hlLower)){

spannableString.setSpan(new ForegroundColorSpan(Color.RED), i, i + hlStr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

spannableString.setSpan(new BackgroundColorSpan(Color.YELLOW), i, i + hlStr.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

}

tvContent.append(spannableString);

}

Android中正方形TextView的实现

分类：Android, Java 阅读 (2,104) 已关闭评论

8月 012020

　　本自定义组件实现了一个以高度为标准的正方形TextView组件，如果想以其他标准（最大或者最小宽度、高度）需要再进行修改：

　　自定义View的代码如下；

import android.content.Context;
import android.util.AttributeSet;

public class SquareTextView extends android.support.v7.widget.AppCompatTextView {
    private String LOG_TAG = "SquareTextView";

    public SquareTextView(Context context) {
        super(context);

    }

    public SquareTextView(Context context, AttributeSet attrs) {
        super(context, attrs);

    }

    public SquareTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // 先让父类计算宽度和高度
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        // 以父类计算的高度获取我们想要的宽度
        int w = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.EXACTLY);
        // 如果只使用setMeasuredDimension会造成对齐效果的失效
        // setMeasuredDimension(getMeasuredHeight(), getMeasuredHeight());
        // 让父类重新计算
        super.onMeasure(w, heightMeasureSpec);
    }

}

import android.content.Context;

import android.util.AttributeSet;

public class SquareTextView extends android.support.v7.widget.AppCompatTextView {

private String LOG_TAG = "SquareTextView";

public SquareTextView(Context context) {

super(context);

}

public SquareTextView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public SquareTextView(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

// 先让父类计算宽度和高度

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

// 以父类计算的高度获取我们想要的宽度

int w = MeasureSpec.makeMeasureSpec(getMeasuredHeight(), MeasureSpec.EXACTLY);

// 如果只使用setMeasuredDimension会造成对齐效果的失效

// setMeasuredDimension(getMeasuredHeight(), getMeasuredHeight());

// 让父类重新计算

super.onMeasure(w, heightMeasureSpec);

}

Android atrace使用说明(Android sdk中的systrace)

分类：Android, Android, Java, Operating System 阅读 (11,036) 已关闭评论

5月 182020

1. 普通使用

atrace -a com.jeoe.ebox gfx wm am sched view app res ss

1	atrace -a com.jeoe.ebox gfx wm am sched view app res ss

这样会把结果输出到控制台，对分析没什么意义，可以用于测试这个命令

2. 抓trace并保存到文件

atrace -a com.jeoe.ebox gfx wm am sched view app res ss -o /sdcard/a.trace

1	atrace -a com.jeoe.ebox gfx wm am sched view app res ss -o /sdcard/a.trace

这样会把分析文件输出到/sdcard/a.trace文件

将a.trace文件导出到电脑，然后使用sdk下的systrace.py程序将分析结果生成html文件，命令如下：

python systrace.py --from-file ~/a.trace -o ~/a.htm

1	python systrace.py --from-file ~/a.trace -o ~/a.htm

–from-file 参数表明从文件读入分析数据

~/a.trace 源数据文件

-o ~/a.html 指定输出文件路径

3. 循环抓取

4. atrace帮助内容

usage: atrace [options] [categories...]
options include:
  -a appname      enable app-level tracing for a comma separated list of cmdlines
  -b N            use a trace buffer size of N KB
  -c              trace into a circular buffer
  -f filename     use the categories written in a file as space-separated
                    values in a line
  -k fname,...    trace the listed kernel functions
  -n              ignore signals
  -s N            sleep for N seconds before tracing [default 0]
  -t N            trace for N seconds [default 5]
  -z              compress the trace dump
  --async_start   start circular trace and return immediately
  --async_dump    dump the current contents of circular trace buffer
  --async_stop    stop tracing and dump the current contents of circular
                    trace buffer
  --stream        stream trace to stdout as it enters the trace buffer
                    Note: this can take significant CPU time, and is best
                    used for measuring things that are not affected by
                    CPU performance, like pagecache usage.
  --list_categories
                  list the available tracing categories
 -o filename      write the trace to the specified file instead
                    of stdout.

usage: atrace [options] [categories...]

options include:

-a appname enable app-level tracing for a comma separated list of cmdlines

-b N use a trace buffer size of N KB

-c trace into a circular buffer

-f filename use the categories written in a file as space-separated

values in a line

-k fname,... trace the listed kernel functions

-n ignore signals

-s N sleep for N seconds before tracing [default 0]

-t N trace for N seconds [default 5]

-z compress the trace dump

--async_start start circular trace and return immediately

--async_dump dump the current contents of circular trace buffer

--async_stop stop tracing and dump the current contents of circular

trace buffer

--stream stream trace to stdout as it enters the trace buffer

Note: this can take significant CPU time, and is best

used for measuring things that are not affected by

CPU performance, like pagecache usage.

--list_categories

list the available tracing categories

-o filename write the trace to the specified file instead

of stdout.

5. 允许的categories

执行下面命令可以看到atrace允许追踪的category

atrace --list_categories

1	atrace --list_categories

下面是笔者附上来的列表

         gfx - Graphics
       input - Input
        view - View System
     webview - WebView
          wm - Window Manager
          am - Activity Manager
          sm - Sync Manager
       audio - Audio
       video - Video
      camera - Camera
         hal - Hardware Modules
         app - Application
         res - Resource Loading
      dalvik - Dalvik VM
          rs - RenderScript
      bionic - Bionic C Library
       power - Power Management
          pm - Package Manager
          ss - System Server
    database - Database
     network - Network
         adb - ADB
         pdx - PDX services
       sched - CPU Scheduling
         irq - IRQ Events
         i2c - I2C Events
        freq - CPU Frequency
        idle - CPU Idle
        disk - Disk I/O
         mmc - eMMC commands
       workq - Kernel Workqueues
  regulators - Voltage and Current Regulators
  binder_driver - Binder Kernel driver
  binder_lock - Binder global lock trace
   pagecache - Page cache

gfx - Graphics

input - Input

view - View System

webview - WebView

wm - Window Manager

am - Activity Manager

sm - Sync Manager

audio - Audio

video - Video

camera - Camera

hal - Hardware Modules

app - Application

res - Resource Loading

dalvik - Dalvik VM

rs - RenderScript

bionic - Bionic C Library

power - Power Management

pm - Package Manager

ss - System Server

database - Database

network - Network

adb - ADB

pdx - PDX services

sched - CPU Scheduling

irq - IRQ Events

i2c - I2C Events

freq - CPU Frequency

idle - CPU Idle

disk - Disk I/O

mmc - eMMC commands

workq - Kernel Workqueues

regulators - Voltage and Current Regulators

binder_driver - Binder Kernel driver

binder_lock - Binder global lock trace

pagecache - Page cache

6. 在自己的程序中加入trace代码

系统版本大于等于Android 4.3 (API18)以上的才可以用

import android.content.Intent
import android.os.Build
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.os.Trace

class MainActivity : AppCompatActivity() {
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            Trace.beginSection("aaabbbcccddd")
        };

　　　　　//*************您的代码


        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
            Trace.endSection();
        };
    }
}

import android.content.Intent

import android.os.Build

import androidx.appcompat.app.AppCompatActivity

import android.os.Bundle

import android.os.Trace

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {

super.onCreate(savedInstanceState)

setContentView(R.layout.activity_main)

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {

Trace.beginSection("aaabbbcccddd")

};

　　　　　//*************您的代码

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {

Trace.endSection();

};

}

Activity什么情况下执行onCreate但不执行onStart

分类：Android, Java 阅读 (2,027) 已关闭评论

5月 152020

今天看到这样一个面试题，遂看了下Android系统源码

发现在ActivityThread.java中的performLaunchActivity函数中有这么一段代码

                if (!r.activity.mFinished) {
                    activity.performStart();
                    r.stopped = false;
                }

if (!r.activity.mFinished) {

activity.performStart();

r.stopped = false;

}

可见，如果在onStart之前如果Activity执行了finish函数，就不会再执行onStart函数了。

示例代码如下：

import androidx.appcompat.app.AppCompatActivity;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import static java.lang.ClassLoader.getSystemClassLoader;

public class MainActivity extends AppCompatActivity {
    private String LOG_TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.d(LOG_TAG, "onCreate");
        finish();
    }

    @Override
    protected void onStart() {
        Log.d(LOG_TAG, "onStart");
        super.onStart();
    }

}

import androidx.appcompat.app.AppCompatActivity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import static java.lang.ClassLoader.getSystemClassLoader;

public class MainActivity extends AppCompatActivity {

private String LOG_TAG = "MainActivity";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Log.d(LOG_TAG, "onCreate");

finish();

}

@Override

protected void onStart() {

Log.d(LOG_TAG, "onStart");

super.onStart();

}

关于Zygote Server的一些问题

分类：Android, Java 阅读 (880) 已关闭评论

5月 112020

既然Zygote Server是使用网络通讯，为什么普通应用不能和它通讯？

笔者本来以为zygote是通过127.0.0.1这种方式创建的server，所以会有此疑问。经过研究发现，zygote是通过文件建立的socket server(具体文件名/dev/socket/zygote)，并且zygote是以root权限运行的，所以它生成的socket文件普通应用是无法进行通讯的。

Ubuntu18.04.4编译Nxp android_o8.1.0_2.1.0-auto-GA版本安卓系统源码

分类：Android, Java 阅读 (1,208) 已关闭评论

4月 132020

一、环境准备

Ubuntu18.04.4，不能使用Ubuntu16会有很多依赖软件版本太低

硬盘200G，内存4G+，交换分区（swap）4G+(可装完系统后添加，见后面错误处理部分)

二、下载源码

官方源码下载脚本链接：https://www.nxp.com/webapp/Download?colCode=O8.1.0_2.1.0_AUTO_GA_SOURCE&appType=license&location=null

三、安装编译时需要的第三方库

sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev x11proto-core-dev libx11-dev lib32z-dev ccache libgl1-mesa-dev libxml2-utils xsltproc unzip

sudo apt install uuid uuid-dev zlib1g-dev liblz-dev liblzo2-2 liblzo2-dev lzop git-core curl u-boot-tools mtd-utils android-tools-fsutils device-tree-compiler gdisk liblz4-tool m4 libz-dev

安装open-jdk-8

sudo add-apt-repository ppa:openjdk-r/ppa

sudo apt-get update

sudo apt-get install openjdk-8-jdk

安装gcc-arm-none-eabi

sudo apt-get install gcc-arm-none-eabi

安装完这一项后，在~/.bashrc中最后一行添加脚本export ARMGCC_DIR=/usr/

然后执行source ~/.bashrc

安装cmake，需要3.13.0版本以上，安装步骤如下，其中./bootstrap那一步可以不用加后面的–qt-gui参数
https://blog.csdn.net/huigougou/article/details/84326907

四、开始编译

　　然后进入到Android源码目录，假设源码在用户根目录的aosp目录中：

cd ~/aosp

　　然后初始化编译环境，使用下面的命令：

source build/envsetup.sh

　　然后选择要编译的目标版本，先输入lunch命令

lunch

　　然后在显示的列表中选择你的目标版本，输入相应的数字，按回车即可

　　然后使用make开始编译，可以使用-j参数增加编译的线程以提高速度，线程数量为cpu核心数的2倍比较合适，比如你的cpu是4核的使用

make -j8

　　就可以了

五、遇到的问题

1. 错误：flex-2.5.39: loadlocale.c:130: _nl_intern_locale_data: Assertion `cnt < (sizeof (_nl_value_type_LC_TIME) / sizeof (_nl_value_type_LC_TIME[0]))’ failed.
Aborted (core dumped)

解决办法：
This will do the trick:

export LC_ALL=C

Add it to your bashrc file or equivalent.
参考链接：https://stackoverflow.com/questions/49955137/error-when-build-lineageos-make-ninja-wrapper-error-1
https://www.jianshu.com/p/2beae17c9b12

2、错误2：
JackServer提示out of memory

解决方案：
修改jack server内存
步骤：
打开./prebuilts/sdk/tools/jack-admin
找到下面这一行
JACK_SERVER_VM_ARGUMENTS=”${JACK_SERVER_VM_ARGUMENTS:=-Dfile.encoding=UTF-8}”
修改为
JACK_SERVER_VM_ARGUMENTS=”${JACK_SERVER_VM_ARGUMENTS:=-Dfile.encoding=UTF-8 -XX:+TieredCompilation -Xmx4096M}”
保存jack-admin文件
在命令行执行
./prebuilts/sdk/tools/jack-admin kill-server
./prebuilts/sdk/tools/jack-admin start-server
重启jack server
然后重新编译

Android系统源码中SeLinux的配置

分类：Android, Java 阅读 (3,165) 已关闭评论

3月 312020

模块中定义的sepolicy策略文件目录如下加入到系统编译中：

在BoardConfig.mk中找BOARD_SEPOLICY_DIRS，将你的sepolicy目录加到这个变量中，如下所示：

BOARD_SEPOLICY_DIRS := \
       device/fsl/imx8/sepolicy \
       packages/services/Car/evs/sepolicy \
       device/fsl/mek_8q/sepolicy

BOARD_SEPOLICY_DIRS := \

device/fsl/imx8/sepolicy \

packages/services/Car/evs/sepolicy \

device/fsl/mek_8q/sepolicy

如何定义域？

在/system/sepolicy/public/attributes文件中输入如下的行来定义

attribute evs_domain;

1	attribute evs_domain;

如何定义某个目录或者应用文件的安全上下文？

首先在/system/sepolicy/private/file_contexts中定义如下：

/system/bin/my_app                                          u:object_r:my_app_exec:s0

1	/system/bin/my_app u:object_r:my_app_exec:s0

然后创建my_app.te的文件来定义具体的规则：

根据logcat中的avc denied的log生成合适的seLinux规则。

我们可以在logcat中看到类似如下的日志：

04-01 07:55:37.768  5155  5155 I evs_app : type=1400 audit(0.0:20): avc: denied { read } for name="egl" dev="mmcblk0p4" ino=1732 scontext=u:r:evs_app:s0 tcontext=u:object_r:system_file:s0 tclass=dir permissive=1
04-01 07:55:37.768  5155  5155 I evs_app : type=1400 audit(0.0:21): avc: denied { open } for path="/system/lib64/egl" dev="mmcblk0p4" ino=1732 scontext=u:r:evs_app:s0 tcontext=u:object_r:system_file:s0 tclass=dir permissive=1
04-01 07:55:37.768  2879  2879 E SELinux : avc:  denied  { find } for interface=android.hardware.automotive.vehicle::IVehicle pid=5155 scontext=u:r:evs_app:s0 tcontext=u:object_r:hal_vehicle_hwservice:s0 tclass=hwservice_manager permissive=1
04-01 07:55:37.936  5155  5155 I evs_app : type=1400 audit(0.0:22): avc: denied { call } for scontext=u:r:evs_app:s0 tcontext=u:r:hal_configstore_default:s0 tclass=binder permissive=1
04-01 07:55:37.941  2879  2879 E SELinux : avc:  denied  { find } for interface=android.hardware.configstore::ISurfaceFlingerConfigs pid=5155 scontext=u:r:evs_app:s0 tcontext=u:object_r:hal_configstore_ISurfaceFlingerConfigs:s0 tclass=hwservice_manager permissive=1
04-01 07:55:42.928  5181  5181 I evs_app : type=1400 audit(0.0:23): avc: denied { call } for scontext=u:r:evs_app:s0 tcontext=u:r:hal_configstore_default:s0 tclass=binder permissive=1

04-01 07:55:37.768 5155 5155 I evs_app : type=1400 audit(0.0:20): avc: denied { read } for name="egl" dev="mmcblk0p4" ino=1732 scontext=u:r:evs_app:s0 tcontext=u:object_r:system_file:s0 tclass=dir permissive=1

04-01 07:55:37.768 5155 5155 I evs_app : type=1400 audit(0.0:21): avc: denied { open } for path="/system/lib64/egl" dev="mmcblk0p4" ino=1732 scontext=u:r:evs_app:s0 tcontext=u:object_r:system_file:s0 tclass=dir permissive=1

04-01 07:55:37.768 2879 2879 E SELinux : avc: denied { find } for interface=android.hardware.automotive.vehicle::IVehicle pid=5155 scontext=u:r:evs_app:s0 tcontext=u:object_r:hal_vehicle_hwservice:s0 tclass=hwservice_manager permissive=1

04-01 07:55:37.936 5155 5155 I evs_app : type=1400 audit(0.0:22): avc: denied { call } for scontext=u:r:evs_app:s0 tcontext=u:r:hal_configstore_default:s0 tclass=binder permissive=1

04-01 07:55:37.941 2879 2879 E SELinux : avc: denied { find } for interface=android.hardware.configstore::ISurfaceFlingerConfigs pid=5155 scontext=u:r:evs_app:s0 tcontext=u:object_r:hal_configstore_ISurfaceFlingerConfigs:s0 tclass=hwservice_manager permissive=1

04-01 07:55:42.928 5181 5181 I evs_app : type=1400 audit(0.0:23): avc: denied { call } for scontext=u:r:evs_app:s0 tcontext=u:r:hal_configstore_default:s0 tclass=binder permissive=1

我们可以通过audit2allow工具把上面的log转换成合适的规则，配置在策略文件中，如果没有安装过这个工具先安装工具，如下：

sudo apt install policycoreutils

1	sudo apt install policycoreutils

将相关的log保存到一个文件中，如avclog.txt，然后执行下面的命令来生成规则：

audit2allow -i avclog.txt

1	audit2allow -i avclog.txt

adb shell dumpsys可以dump的服务

分类：Android, Android, Java, Operating System 阅读 (2,116) 已关闭评论

3月 122020

　　adb shell dumpsys显示的结果比较长，有的时候我们只想看某一个服务的dump信息，在后面加上那个服务的名字就可以了。我们执行完adb shell dumpsys后，最顶部显示的是当前运行的服务列表，这个列表就是可以细项输出的每个服务名称的列表。

　　比如：adb shell dumpsys alarm输出的就只有SurfaceFlinger服务的输出信息。

　　对于某些服务，还能指定更小的分类，比如adb shell dumpsys activity还有更细的输出adb shell dumpsys activity broadcasts，这个我们通过adb shell dumpsys activity -h打印帮助信息就能看到子分类的参数说明了。

　　adb shell dumpsys生成的列表

Currently running services:
  DockObserver
  SurfaceFlinger
  accessibility
  activity
  alarm
  android.security.keystore
  android.service.gatekeeper.IGateKeeperService
  appops
  appwidget
  audio
  autofill
  backup
  battery
  batteryproperties
  batterystats
  carrier_config
  clipboard
  commontime_management
  companiondevice
  connectivity
  connmetrics
  content
  contexthub
  country_detector
  cpuinfo
  dbinfo
  device_identifiers
  device_policy
  deviceidle
  devicestoragemonitor
  display
  dreams
  drm.drmManager
  dropbox
  gfxinfo
  gpu
  graphicsstats
  hardware_properties
  input
  input_method
  installd
  iphonesubinfo
  isms
  isub
  jobscheduler
  launcherapps
  location
  lock_settings
  media.audio_flinger
  media.audio_policy
  media.camera
  media.camera.proxy
  media.drm
  media.extractor
  media.metrics
  media.player
  media.resource_manager
  media.sound_trigger_hw
  media_projection
  media_resource_monitor
  media_router
  media_session
  meminfo
  mount
  netd
  netd_listener
  netpolicy
  netstats
  network_management
  network_score
  network_time_update_service
  notification
  otadexopt
  overlay
  package
  package_native
  permission
  phone
  pinner
  power
  processinfo
  procstats
  recovery
  restrictions
  rttmanager
  scheduling_policy
  search
  sec_key_att_app_id_provider
  sensorservice
  serial
  servicediscovery
  settings
  shortcut
  simphonebook
  soundtrigger
  statusbar
  storaged
  storagestats
  telecom
  telephony.registry
  textservices
  thermalservice
  trust
  uimode
  updatelock
  usagestats
  usb
  user
  voiceinteraction
  vrmanager
  wallpaper
  webviewupdate
  wifi
  wificond
  wifiscanner
  window

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

Currently running services:

DockObserver

SurfaceFlinger

accessibility

activity

alarm

android.security.keystore

android.service.gatekeeper.IGateKeeperService

appops

appwidget

audio

autofill

backup

battery

batteryproperties

batterystats

carrier_config

clipboard

commontime_management

companiondevice

connectivity

connmetrics

content

contexthub

country_detector

cpuinfo

dbinfo

device_identifiers

device_policy

deviceidle

devicestoragemonitor

display

dreams

drm.drmManager

dropbox

gfxinfo

gpu

graphicsstats

hardware_properties

input

input_method

installd

iphonesubinfo

isms

isub

jobscheduler

launcherapps

location

lock_settings

media.audio_flinger

media.audio_policy

media.camera

media.camera.proxy

media.drm

media.extractor

media.metrics

media.player

media.resource_manager

media.sound_trigger_hw

media_projection

media_resource_monitor

media_router

media_session

meminfo

mount

netd

netd_listener

netpolicy

netstats

network_management

network_score

network_time_update_service

notification

otadexopt

overlay

package

package_native

permission

phone

pinner

power

processinfo

procstats

recovery

restrictions

rttmanager

scheduling_policy

sec_key_att_app_id_provider

sensorservice

serial

servicediscovery

settings

shortcut

simphonebook

soundtrigger

statusbar

storaged

storagestats

telecom

telephony.registry

textservices

thermalservice

trust

uimode

updatelock

usagestats

usb

user

voiceinteraction

vrmanager

wallpaper

webviewupdate

wifi

wificond

wifiscanner

window

使用adb查看Settings Provider的值

分类：Android, Java 阅读 (11,257) No Responses »

5月 252018

　　Settings Provider是指通过如下方式设置的系统变量数据库

Settings.System.putInt(getActivity().getContentResolver(), "sound_effects_enabled", 1);

1	Settings.System.putInt(getActivity().getContentResolver(), "sound_effects_enabled", 1);

　　Settings共有三种分类，分别如下：

global：所有的偏好设置对系统的所有用户公开，第三方APP有读没有写的权限；
system：包含各种各样的用户偏好系统设置；
secure：安全性的用户偏好系统设置，第三方APP有读没有写的权限。

查看某一个设置项的值：

　　当我们调试时，需要查看设置里面的值，通过调试程序会比较慢，其实我们通过adb就可以查看，命令行如下：

adb shell settings get system sound_effects_enabled

1	adb shell settings get system sound_effects_enabled

　　其中的get system可以根据设置的具体情况改成get global或者get secure

　　如果返回null说明没有这个选项

设置某个项的值：

　　当然我们也可以设置相关选项的值，通过put命令，示例如下：

adb shell settings put system sound_effects_enabled 1

1	adb shell settings put system sound_effects_enabled 1

打印某个域的所有值：

adb shell settings list secure

1	adb shell settings list secure

Page 1 of 4 1 2 3 4 Older Entries

1. 普通使用

2. 抓trace并保存到文件

3. 循环抓取

4. atrace帮助内容

5. 允许的categories

6. 在自己的程序中加入trace代码

既然Zygote Server是使用网络通讯，为什么普通应用不能和它通讯？

一、环境准备

二、下载源码

三、安装编译时需要的第三方库

四、开始编译

五、遇到的问题

1. 错误：flex-2.5.39: loadlocale.c:130: _nl_intern_locale_data: Assertion `cnt < (sizeof (_nl_value_type_LC_TIME) / sizeof (_nl_value_type_LC_TIME[0]))’ failed. Aborted (core dumped)

2、错误2： JackServer提示out of memory

模块中定义的sepolicy策略文件目录如下加入到系统编译中：

如何定义域？

如何定义某个目录或者应用文件的安全上下文？

根据logcat中的avc denied的log生成合适的seLinux规则。

查看某一个设置项的值：

设置某个项的值：

打印某个域的所有值：

1. 错误：flex-2.5.39: loadlocale.c:130: _nl_intern_locale_data: Assertion `cnt < (sizeof (_nl_value_type_LC_TIME) / sizeof (_nl_value_type_LC_TIME[0]))’ failed.
Aborted (core dumped)

2、错误2：
JackServer提示out of memory