Android 开发技术流程

1.网络连接通信

HttpClient 类通信(见《第一行代码》 郭霖2014.8月第一版P385)

Android Asynchronous Http Client  (见  http://loopj.com/android-async-http/  )   

更多见   https://github.com/itheima1/Android

2.网页浏览 webView

https://github.com/getlantern/FinestWebView-Android

3.日志工具(一个静态类)

public class LogUtil{
    public static final int VERBOSE =1;
    public static final int DEBUG =2;
    public static final int INFO=3;
    public static final int WARN=4;
    public static final int ERROR=5;
    public static final int NOTHING=6;
    public static final int LEVEL=VERBOSE;
    public static void v(String tag,String msg){
        if(VERBOSE>=LEVEL){
            Log.v(tag,msg);
        }
    }
    public static void d(String tag,String msg){
        if(DEBUG>=LEVEL)
        {
            Log.d(tag,msg);
        }
    }
    public static void i(String tag,String msg){
        if(INFO>=LEVEL){
            Log.i(tag,msg);
        }
    }
    public static void w(String tag,String msg){
        if(WARN>=LEVEL){
            Log.w(tag,msg);
        }
    }
    public static void e(String tag,String msg){
        if(ERROR>=LEVEL){
            Log.e(tag, msg);
        }
    }
}
View Code

4.Active切换

public class SecondActivity extends Activity{
        public static  void actionStart(Context context,String data1,String datta2){
            Intent intent = new Intent(context,SecondActivity.class);
            intent.putExtra("param1",data);
            intent.putExtra("param2",data2);
            context.startActivity(intent);
        }
    }

5.Intent 传递对象(例如Person对象)

  一.Person 要继承 Serializable(即;public class Person implements Serializable{.....})

  二.传递有intent.putExtra("person",person)

  三.获取对象  Person person = (Person) getInstant().getSerializableExtra("person");

 6.全局获取Context(and 全局变量存储)

 7.左侧滑出菜单栏(使用布局:android.support.v4.widget.DrawerLayout) 

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <!-- The navigation drawer -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"       <!--此处是关键语句-->
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

禁止滑动调出侧边栏:

mDrawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED); //关闭手势滑动
mDrawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED); //打开手势滑动 

参考资料:http://blog.csdn.net/very_caiing/article/details/41854569    

       https://developer.android.com/training/implementing-navigation/nav-drawer.html

8.Android开发需要新建的文件夹  

Helpers:存放一些帮助类文件
Models:存放模型
Services:存放网络通信,或一些调用手机硬件接口的方法类
Adapters: ListView 的adapter
Controls:存放自定义控件
Fragments:存放定义的Fragents

9.知晓当前实在哪一个活动

  在onCreate()方法中添加语句:

Log.d("BaseActivity",getClass().getSimpleName());

 10.Android 图表控件

  https://github.com/PhilJay/MPAndroidChart

  https://github.com/PhilJay/MPAndroidChart/wiki

11.Android 开发必看

http://www.jdzhao.com/

http://a.codekk.com/

https://github.com/hehonghui/android-tech-frontier

http://www.simplecoder.cn/

http://www.open-open.com/lib/view/open1461395311690.html  //完整项目mvp

http://blog.csdn.net/typename/article/details/39030091             //webview

http://www.devtf.cn/

12.Android网络HttpClient(像html中 ajax 调用服务)

和Ajax的功能相同(确保服务ajax可以正常使用)

  1.“http://192.168.17.44:81/amtioth5.Wcf/AjaxGetData/DataService.asmx”是地址

  2.hello是方法名

  3.obj.put("name", "your name"); 传参数。

  4.相关下载:链接:http://pan.baidu.com/s/1eSsftya 密码:pf52

 try {
            HttpClient httpclient = new DefaultHttpClient();
            String uri = "http://192.168.17.44:81/amtioth5.Wcf/AjaxGetData/DataService.asmx/hello";  //类似这样的地址也可以:http://192.168.17.44:81/amtioth5.Wcf/Service2.svc/DoWork2
            HttpPost httppost = new HttpPost(uri);
            //添加http头信息
            httppost.addHeader("Content-Type", "application/json");
            httppost.addHeader("User-Agent", "imgfornote");
            //http post的json数据格式:  {"name": "your name","parentId": "id_of_parent"}
            JSONObject obj = new JSONObject();
            obj.put("name", "your name");
            httppost.setEntity(new StringEntity(obj.toString()));
            HttpResponse response;
            response = httpclient.execute(httppost);
            int code = response.getStatusLine().getStatusCode();
            if (code == 200) {
                String rev = EntityUtils.toString(response.getEntity());
            }
        } catch (ClientProtocolException e) {
        } catch (IOException e) {
        } catch (JSONException e) {
        }

 13.线程

  一、新建一个类继承子Thread    

class MyThread extends Thread{
    @Override
    public void run(){
        //TODO
    }
}
//启动线程
new MyThread().start();

  二、实现Runnable 接口

class MyThread implements Runnable{
    @Override
    public void run(){
        //TODO
    }
}
//启动线程
MyThread myThread = new MyThread();
new Thread(myThread).start();  

//UI interactive

private Handler handler = new Handler(){
    public void handlerMessage(Message msg){
        switch(msg.what){
            // case .... handle UI
            default:
                break;
        }
    }
}

三、使用AsyncTask    /*recommend*/

class DownLoadTask extends AsyncTask<Void, Integer, Boolean>{
    @Override
    protected void onPreExecute(){}
    @Override
    protected Boolean doInBackground(void... params){return true;}
    @Override
    protected void onProgressUpdate(Integer... value){}
    @Override
    protected void onPostExecute(Boolean result){}
}
// 执行
new DownLoadTask().execute();

 14.底部tab

http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0731/3247.html

https://www.aswifter.com/2015/07/02/Material-Design-Example-5/

https://github.com/lwngreat/MaterialDesignExample

https://www.aswifter.com/2015/08/09/implements-bottom-tab-with-tablayout/

http://www.jianshu.com/p/c3f6d316ec5b

https://www.aswifter.com/android/            /*importent*/

 15.Android Studio 使用  proguard

  配置文件   proguard-rules.pro (Eclipse中的文件名为proguard.cfg)  

#指定代码的压缩级别
-optimizationpasses 5
#是否使用大小写混合
-dontusemixedcaseclassnames
#优化/不优化输入的类文件
-dontoptimize
#是否混淆第三方jar包
-dontskipnonpubliclibraryclasses
#混淆时是否做预校验
-dontpreverify
#混淆时是否记录日志
-verbose
#混淆时所采用的算法
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
#保护注解
-keepattributes *Annotation*

#保持JNI用到的native方法不被混淆
-keepclasseswithmembers class * {
    native <methods>;
}

#保持自定义控件的构造函数不被混淆,因为自定义控件很可能直接写在布局文件中
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

#保持自定义控件的构造函数不被混淆
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

#保持布局中onClick属性指定的方法不被混淆
-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

#保持枚举enum类不被混淆
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

#保持序列化的Parcelable不被混淆
-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

#指定哪些第三方jar包需要混淆
#-libraryjars libs/bcprov-jdk16-1.46.jar

#保持哪些系统组件类不被混淆
-keep public class * extends android.app.Fragment  
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class * extends android.support.v4.**
-keep public class com.android.vending.licensing.ILicensingService

#保持哪些第三方jar包不被混淆
-keep class com.baidu.** {*;}
-keep class vi.com.** {*;}    
-dontwarn com.baidu.**
-dontwarn org.xmlpull.v1.XmlPullParser
-dontwarn org.xmlpull.v1.XmlSerializer
View Code

 将配置添加的app项目中

//混淆
minifyEnabled true
//加载默认混淆配置文件及自定义混淆 配置
proguardFiles getDefaultProguardFile(‘proguard-android.txt’),’proguard-rules.pro’ 
我们设置minifyEnabled true,就会在打包的时候进行代码混淆处理. 其中proguard-android.txt不用管,在sdk目录里面,我们主要是配置了proguard-rules.pro文件。可能大家直接在Eclipse创建项目不会有这个文件,而是 proguard.cfg文件,其实一样的。
参考:http://blog.csdn.net/aqi00/article/details/50773578
运行出现错误:

  

  17:40:18 Gradle build finished with 1 error(s) and 23 warning(s) in 2s 946ms
  17:40:18 Generate Signed APK: Errors while building APK. You can find the errors in the 'Messages' view.

  /*************-------------------*******************/

  Warning:library class android.content.res.ColorStateList depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.AnimationDrawable depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.BitmapDrawable depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.ClipDrawable depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.ColorDrawable depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser
  Warning:library class android.graphics.drawable.GradientDrawable depends on program class org.xmlpull.v1.XmlPullParser

解决方法:在proguard-rules.pro 添加如下内容

-dontwarn org.xmlpull.v1.XmlPullParser

-dontwarn org.xmlpull.v1.XmlSerializer

16.App检测更新

http://blog.csdn.net/wwj_748/article/details/8195565

图书:

Android 源码设计模式解析与实战(何红辉关爱民 著)

原文地址:https://www.cnblogs.com/lwngreat/p/5488272.html