AndroidMultiChannelBuildTool/JavaUtil/ChannelUtil.java at master · jiap0724/AndroidMultiChannelBuildTool · GitHub

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package com.czt.util;

import java.io.IOException;

import java.util.Enumeration;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import android.content.Context;

import android.content.SharedPreferences;

import android.content.SharedPreferences.Editor;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageManager.NameNotFoundException;

import android.preference.PreferenceManager;

import android.text.TextUtils;

public class ChannelUtil {

private static final String CHANNEL_KEY = "cztchannel";

private static final String CHANNEL_VERSION_KEY = "cztchannel_version";

private static String mChannel;

/**

* 返回市场。如果获取失败返回""

* @param context

* @return

public static String getChannel(Context context){

return getChannel(context, "");

}

/**

* 返回市场。如果获取失败返回defaultChannel

* @param context

* @param defaultChannel

* @return

public static String getChannel(Context context, String defaultChannel) {

//内存中获取

if(!TextUtils.isEmpty(mChannel)){

return mChannel;

}

//sp中获取

mChannel = getChannelBySharedPreferences(context);

if(!TextUtils.isEmpty(mChannel)){

return mChannel;

}

//从apk中获取

mChannel = getChannelFromApk(context, CHANNEL_KEY);

if(!TextUtils.isEmpty(mChannel)){

//保存sp中备用

saveChannelBySharedPreferences(context, mChannel);

return mChannel;

}

//全部获取失败

return defaultChannel;

}

/**

* 从apk中获取版本信息

* @param context

* @param channelKey

* @return

private static String getChannelFromApk(Context context, String channelKey) {

//从apk包中获取

ApplicationInfo appinfo = context.getApplicationInfo();

String sourceDir = appinfo.sourceDir;

//默认放在meta-inf/里，所以需要再拼接一下

String key = "META-INF/" + channelKey;

String ret = "";

ZipFile zipfile = null;

try {

zipfile = new ZipFile(sourceDir);

Enumeration<?> entries = zipfile.entries();

while (entries.hasMoreElements()) {

ZipEntry entry = ((ZipEntry) entries.nextElement());

String entryName = entry.getName();

if (entryName.startsWith(key)) {

ret = entryName;

break;

}

} catch (IOException e) {

e.printStackTrace();

} finally {

if (zipfile != null) {

try {

zipfile.close();

} catch (IOException e) {

e.printStackTrace();

}

String[] split = ret.split("_");

String channel = "";

if (split != null && split.length >= 2) {

channel = ret.substring(split[0].length() + 1);

}

return channel;

}

/**

* 本地保存channel & 对应版本号

* @param context

* @param channel

private static void saveChannelBySharedPreferences(Context context, String channel){

SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);

Editor editor = sp.edit();

editor.putString(CHANNEL_KEY, channel);

editor.putInt(CHANNEL_VERSION_KEY, getVersionCode(context));

editor.commit();

}

/**

* 从sp中获取channel

* @param context

* @return 为空表示获取异常、sp中的值已经失效、sp中没有此值

private static String getChannelBySharedPreferences(Context context){

SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);

int currentVersionCode = getVersionCode(context);

if(currentVersionCode == -1){

//获取错误

return "";

}

int versionCodeSaved = sp.getInt(CHANNEL_VERSION_KEY, -1);

if(versionCodeSaved == -1){

//本地没有存储的channel对应的版本号

//第一次使用或者原先存储版本号异常

return "";

}

if(currentVersionCode != versionCodeSaved){

return "";

}

return sp.getString(CHANNEL_KEY, "");

}

/**

* 从包信息中获取版本号

* @param context

* @return

private static int getVersionCode(Context context){

try{

return context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;

}catch(NameNotFoundException e) {

e.printStackTrace();

}

return -1;

}

AndroidMultiChannelBuildTool/JavaUtil/ChannelUtil.java at master · jiap0724/AndroidMultiChannelBuildTool · GitHub

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