Diycode开源项目 SettingActivity分析

1.整体效果预览及布局分析

1.1.设置界面预览

　　

 

1.2.主体对应关系

　　

　　注意这里的线条用ImageView来实现

　　有一个TextView是检查更新，默认隐藏，具体出现时间还得之后确认。

 

　　最后一个LinearLayout是用于登录用户还是未登录用户的区分。

　　其他都是确定好的静态布局。当然缓存大小和当前版本会变化。

 

1.3.外层布局和内层布局的关联

　　

　　这里toolbar也是不能少的。

　　然后将剩下的布局用一个NestedScrollView包括，紧接着是一个LinearLayout布局。

　　NestedScrollView支持嵌套布局。

　　如果我把下面的LinearLayout加长，可以做到类似这样的效果：

　　

 

1.4.布局源代码

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright 2017 GcsSloop
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~    http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  ~
  ~ Last modified 2017-03-22 04:30:23
  ~
  ~ GitHub:  https://github.com/GcsSloop
  ~ Website: http://www.gcssloop.com
  ~ Weibo:   http://weibo.com/GcsSloop
  -->

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_setting"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.gcssloop.diycode.activity.SettingActivity">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <android.support.v4.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/diy_white_bg">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:baselineAligned="false"
            android:orientation="vertical">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white_bg"
                android:padding="12dp"
                android:text="应用"
                android:textStyle="bold"/>

            <RelativeLayout
                android:id="@+id/clear_cache"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white"
                android:padding="16dp">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="清除缓存"
                    android:textSize="16sp"/>

                <TextView
                    android:id="@+id/cache_size"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:textSize="16sp"
                    tools:text="1.00M"/>
            </RelativeLayout>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:background="@color/diy_white"
                android:paddingLeft="16dp"
                android:paddingRight="16dp"
                android:src="@color/diy_gray"/>

            <RelativeLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white"
                android:padding="16dp">

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="当前版本"
                    android:textSize="16sp"/>

                <TextView
                    android:id="@+id/app_version"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_alignParentRight="true"
                    android:checked="true"
                    tools:text="v0.0.1"/>
            </RelativeLayout>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:background="@color/diy_white"
                android:paddingLeft="16dp"
                android:paddingRight="16dp"
                android:src="@color/diy_gray"/>

            <TextView
                android:visibility="gone"
                android:id="@+id/check_version"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white"
                android:padding="16dp"
                android:text="检测更新"
                android:textSize="16sp"/>

            <TextView
                android:id="@+id/about"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white"
                android:padding="16dp"
                android:text="关于"
                android:textSize="16sp"/>

            <ImageView
                android:layout_width="match_parent"
                android:layout_height="1dp"
                android:background="@color/diy_white"
                android:paddingLeft="16dp"
                android:paddingRight="16dp"
                android:src="@color/diy_gray"/>

            <TextView
                android:id="@+id/contribute"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/diy_white"
                android:gravity="center"
                android:padding="16dp"
                android:text="¥ 捐赠一杯咖啡"
                android:textColor="#4AC432"
                android:textSize="16sp"/>

            <LinearLayout
                android:id="@+id/user"
                android:layout_width="match_parent"
                android:layout_height="600dp"
                android:orientation="vertical">

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/diy_white_bg"
                    android:padding="12dp"
                    android:text="用户"
                    android:textStyle="bold"/>

                <TextView
                    android:id="@+id/logout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@color/diy_white"
                    android:gravity="center"
                    android:padding="16dp"
                    android:text="退出登录"
                    android:textColor="@color/diy_red"
                    android:textSize="16sp"/>
            </LinearLayout>


        </LinearLayout>


    </android.support.v4.widget.NestedScrollView>


</LinearLayout>

　　SettingActivity活动的布局名称为：activity_setting.xml

2.SettingActivity源代码分析

2.1.成员变量分析

　　成员变量仅仅只有一个Config。

　　Config类为用户设置，在通用类中定义，源代码为：

/*
 * Copyright 2017 GcsSloop
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Last modified 2017-03-28 04:48:02
 *
 * GitHub:  https://github.com/GcsSloop
 * Website: http://www.gcssloop.com
 * Weibo:   http://weibo.com/GcsSloop
 */

package com.gcssloop.diycode.utils;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.LruCache;

import com.gcssloop.diycode_sdk.utils.ACache;

import java.io.Serializable;

/**
 * 用户设置
 */
public class Config {
    private static int M = 1024 * 1024;
    private volatile static Config mConfig;
    private static LruCache<String, Object> mLruCache = new LruCache<>(1 * M);
    private static ACache mDiskCache;

    private Config(Context context) {
        mDiskCache = ACache.get(context, "config");
    }

    public static Config init(Context context) {
        if (null == mConfig) {
            synchronized (Config.class) {
                if (null == mConfig) {
                    mConfig = new Config(context);
                }
            }
        }
        return mConfig;
    }

    public static Config getSingleInstance() {
        return mConfig;
    }

    //--- 基础 -----------------------------------------------------------------------------------

    public <T extends Serializable> void saveData(@NonNull String key, @NonNull T value) {
        mLruCache.put(key, value);
        mDiskCache.put(key, value);
    }

    public <T extends Serializable> T getData(@NonNull String key, @Nullable T defaultValue) {
        T result = (T) mLruCache.get(key);
        if (result != null) {
            return result;
        }
        result = (T) mDiskCache.getAsObject(key);
        if (result != null) {
            mLruCache.put(key, result);
            return result;
        }
        return defaultValue;
    }

    //--- 浏览器 ---------------------------------------------------------------------------------

    private static String Key_Browser = "UseInsideBrowser_";

    public void setUesInsideBrowser(@NonNull Boolean bool) {
        saveData(Key_Browser, bool);
    }

    public Boolean isUseInsideBrowser() {
        return getData(Key_Browser, Boolean.TRUE);
    }


    //--- 首页状态 -------------------------------------------------------------------------------

    private String Key_MainViewPager_Position = "Key_MainViewPager_Position";

    public void saveMainViewPagerPosition(Integer position) {
        mLruCache.put(Key_MainViewPager_Position, position);
    }

    public Integer getMainViewPagerPosition() {
        return getData(Key_MainViewPager_Position, 0);
    }

    //--- Topic状态 ------------------------------------------------------------------------------

    private String Key_TopicList_LastPosition = "Key_TopicList_LastPosition";
    private String Key_TopicList_LastOffset = "Key_TopicList_LastOffset";

    public void saveTopicListState(Integer lastPosition, Integer lastOffset) {
        saveData(Key_TopicList_LastPosition, lastPosition);
        saveData(Key_TopicList_LastOffset, lastOffset);
    }

    public Integer getTopicListLastPosition() {
        return getData(Key_TopicList_LastPosition, 0);
    }

    public Integer getTopicListLastOffset() {
        return getData(Key_TopicList_LastOffset, 0);
    }

    private String Key_TopicList_PageIndex = "Key_TopicList_PageIndex";

    public void saveTopicListPageIndex(Integer pageIndex) {
        saveData(Key_TopicList_PageIndex, pageIndex);
    }

    public Integer getTopicListPageIndex() {
        return getData(Key_TopicList_PageIndex, 0);
    }

    //--- News状态 ------------------------------------------------------------------------------

    private String Key_NewsList_LastScroll = "Key_NewsList_LastScroll";

    public void saveNewsListScroll(Integer lastScrollY) {
        saveData(Key_NewsList_LastScroll, lastScrollY);
    }

    public Integer getNewsLastScroll() {
        return getData(Key_NewsList_LastScroll, 0);
    }

    private String Key_NewsList_LastPosition = "Key_NewsList_LastPosition";

    public void saveNewsListPosition(Integer lastPosition) {
        saveData(Key_NewsList_LastPosition, lastPosition);
    }

    public Integer getNewsListLastPosition() {
        return getData(Key_NewsList_LastPosition, 0);
    }


    private String Key_NewsList_PageIndex = "Key_NewsList_PageIndex";

    public void saveNewsListPageIndex(Integer pageIndex) {
        saveData(Key_NewsList_PageIndex, pageIndex);
    }

    public Integer getNewsListPageIndex() {
        return getData(Key_NewsList_PageIndex, 0);
    }
}

 

2.2.然后加载布局代码

　　

2.3.然后初始化视图

　　

　　首先将标题设置好。

　　获得缓存大小。

　　从BaseActivity中的成员变量mDiycode中来获取登录信息，如果登录了，则下面要显示退出登录字样。

　　然后设置监听事件。

 

2.4.显示缓存大小

　　

　　首先从FileUtil通用类中获取缓存地址。

　　FileUitl源代码如下：

/*
 * Copyright 2017 GcsSloop
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Last modified 2017-03-08 01:01:18
 *
 * GitHub:  https://github.com/GcsSloop
 * Website: http://www.gcssloop.com
 * Weibo:   http://weibo.com/GcsSloop
 */

package com.gcssloop.diycode.utils;

import android.content.Context;
import android.os.Environment;

import java.io.File;

public class FileUtil {
    private FileUtil() {
    }

//****系统文件目录**********************************************************************************************

    /**
     * @return 程序系统文件目录
     */
    public static String getFileDir(Context context) {
        return String.valueOf(context.getFilesDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 程序系统文件目录绝对路径
     */
    public static String getFileDir(Context context, String customPath) {
        String path = context.getFilesDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****系统缓存目录**********************************************************************************************

    /**
     * @return 程序系统缓存目录
     */
    public static String getCacheDir(Context context) {
        return String.valueOf(context.getCacheDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 程序系统缓存目录
     */
    public static String getCacheDir(Context context, String customPath) {
        String path = context.getCacheDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****Sdcard文件目录**********************************************************************************************

    /**
     * @return 内存卡文件目录
     */
    public static String getExternalFileDir(Context context) {
        return String.valueOf(context.getExternalFilesDir(""));
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 内存卡文件目录
     */
    public static String getExternalFileDir(Context context, String customPath) {
        String path = context.getExternalFilesDir("") + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****Sdcard缓存目录**********************************************************************************************

    /**
     * @return 内存卡缓存目录
     */
    public static String getExternalCacheDir(Context context) {
        return String.valueOf(context.getExternalCacheDir());
    }

    /**
     * @param context    上下文
     * @param customPath 自定义路径
     * @return 内存卡缓存目录
     */
    public static String getExternalCacheDir(Context context, String customPath) {
        String path = context.getExternalCacheDir() + formatPath(customPath);
        mkdir(path);
        return path;
    }

//****公共文件夹**********************************************************************************************

    /**
     * @return 公共下载文件夹
     */
    public static String getPublicDownloadDir() {
        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath();
    }

//****相关工具**********************************************************************************************

    /**
     * 创建文件夹
     *
     * @param DirPath 文件夹路径
     */
    public static void mkdir(String DirPath) {
        File file = new File(DirPath);
        if (!(file.exists() && file.isDirectory())) {
            file.mkdirs();
        }
    }

    /**
     * 格式化文件路径
     * 示例：  传入 "sloop" "/sloop" "sloop/" "/sloop/"
     * 返回 "/sloop"
     */
    private static String formatPath(String path) {
        if (!path.startsWith("/"))
            path = "/" + path;
        while (path.endsWith("/"))
            path = new String(path.toCharArray(), 0, path.length() - 1);
        return path;
    }

    /**
     * @return 存储卡是否挂载(存在)
     */
    public static boolean isMountSdcard() {
        String status = Environment.getExternalStorageState();
        return status.equals(Environment.MEDIA_MOUNTED);
    }

}

 

　　然后从DataCleanManager通用类中获取缓存大小。

 　 DataCleanManager源代码如下：　

/*
 * Copyright 2017 GcsSloop
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Last modified 2017-03-26 03:46:50
 *
 * GitHub:  https://github.com/GcsSloop
 * Website: http://www.gcssloop.com
 * Weibo:   http://weibo.com/GcsSloop
 */

package com.gcssloop.diycode.utils;

import android.content.Context;
import android.os.Environment;
import android.text.TextUtils;

import java.io.File;
import java.math.BigDecimal;

/**
 * 本应用数据清除管理器
 */
public class DataCleanManager {
    /**
     * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * *
     *
     * @param context
     */
    public static void cleanInternalCache(Context context) {
        deleteFilesByDirectory(context.getCacheDir());
    }

    /**
     * * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * *
     *
     * @param context
     */
    public static void cleanDatabases(Context context) {
        deleteFilesByDirectory(new File("/data/data/"
                + context.getPackageName() + "/databases"));
    }

    /**
     * * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) *
     *
     * @param context
     */
    public static void cleanSharedPreference(Context context) {
        deleteFilesByDirectory(new File("/data/data/"
                + context.getPackageName() + "/shared_prefs"));
    }

    /**
     * * 按名字清除本应用数据库 * *
     *
     * @param context
     * @param dbName
     */
    public static void cleanDatabaseByName(Context context, String dbName) {
        context.deleteDatabase(dbName);
    }

    /**
     * * 清除/data/data/com.xxx.xxx/files下的内容 * *
     *
     * @param context
     */
    public static void cleanFiles(Context context) {
        deleteFilesByDirectory(context.getFilesDir());
    }

    /**
     * * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache)
     *
     * @param context
     */
    public static void cleanExternalCache(Context context) {
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED)) {
            deleteFilesByDirectory(context.getExternalCacheDir());
        }
    }

    /**
     * * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * *
     *
     * @param filePath
     */
    public static void cleanCustomCache(String filePath) {
        deleteFilesByDirectory(new File(filePath));
    }

    /**
     * * 清除本应用所有的数据 * *
     *
     * @param context
     * @param filepath
     */
    public static void cleanApplicationData(Context context, String... filepath) {
        cleanInternalCache(context);
        cleanExternalCache(context);
        cleanDatabases(context);
        cleanSharedPreference(context);
        cleanFiles(context);
        if (filepath == null) {
            return;
        }
        for (String filePath : filepath) {
            cleanCustomCache(filePath);
        }
    }

    /**
     * * 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * *
     *
     * @param directory
     */
    private static void deleteFilesByDirectory(File directory) {
        if (directory != null && directory.exists() && directory.isDirectory()) {
            for (File item : directory.listFiles()) {
                item.delete();
            }
        }
    }

    // 获取文件
    //Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/ 目录，一般放一些长时间保存的数据
    //Context.getExternalCacheDir() --> SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据
    public static long getFolderSize(File file) throws Exception {
        long size = 0;
        try {
            File[] fileList = file.listFiles();
            for (int i = 0; i < fileList.length; i++) {
                // 如果下面还有文件
                if (fileList[i].isDirectory()) {
                    size = size + getFolderSize(fileList[i]);
                } else {
                    size = size + fileList[i].length();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return size;
    }

    /**
     * 删除指定目录下文件及目录
     *
     * @param deleteThisPath
     * @param filePath
     * @return
     */
    public static void deleteFolderFile(String filePath, boolean deleteThisPath) {
        if (!TextUtils.isEmpty(filePath)) {
            try {
                File file = new File(filePath);
                if (file.isDirectory()) {// 如果下面还有文件
                    File files[] = file.listFiles();
                    for (int i = 0; i < files.length; i++) {
                        deleteFolderFile(files[i].getAbsolutePath(), true);
                    }
                }
                if (deleteThisPath) {
                    if (!file.isDirectory()) {// 如果是文件，删除
                        file.delete();
                    } else {// 目录
                        if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除
                            file.delete();
                        }
                    }
                }
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    /**
     * 格式化单位
     *
     * @param size
     * @return
     */
    public static String getFormatSize(double size) {
        double kiloByte = size / 1024;
        if (kiloByte < 1) {
            return size + "Byte";
        }

        double megaByte = kiloByte / 1024;
        if (megaByte < 1) {
            BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
            return result1.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "KB";
        }

        double gigaByte = megaByte / 1024;
        if (gigaByte < 1) {
            BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
            return result2.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "MB";
        }

        double teraBytes = gigaByte / 1024;
        if (teraBytes < 1) {
            BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
            return result3.setScale(2, BigDecimal.ROUND_HALF_UP)
                    .toPlainString() + "GB";
        }
        BigDecimal result4 = new BigDecimal(teraBytes);
        return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()
                + "TB";
    }


    public static String getCacheSize(File file) throws Exception {
        return getFormatSize(getFolderSize(file));
    }

}

 

2.5.点击事件

　　

　　点击了退出登录，执行mDiycode.logout()

　　点击了清理缓存，从DataCleanManager通用类中清理，然后注意再次显示缓存　　

　　点击了关于，将打开关于活动页面

　　点击了捐赠，将打开支付宝进行捐赠

3.总结一下

3.1.设置页面也是一个数据量不大的一个页面，有点类似于静态界面。因为大部分都已经定义好了。

 

3.2.在initViews中读取缓存大小。采用了一个FileUtil通用类来获取存储路径，然后再用一个DataCleanManager

　　类来读取缓存大小。这两个类基本都可以通用的。以后再仔细研究这两个通用类。

 

3.3.如何获取APP版本？这里利用了一个通用类AppUtil，直接利用holder.setText(资源id,app版本)设置。

 

3.4.注意点：这里用户登录与否决定了视图的显示与否，所以一定要先判断一下，再调用API。