寫這篇文章之前可以成功執行,文章後就各種找不到檔案.所以並沒有採用此種方式,後期完善.詳見下篇解決方案.

配置檔案讀取很容易,修改需要注意許可權,比如assets目錄下就不允許修改.

配置檔案的建立:

New --- File

命名後選擇properties方式開啟

配置檔案設定

contrastIP = 192.166.1.65:8011

assets目錄建立

在main目錄下,與java res 目錄同級建立.

New --- Folder --- Assets Folder

assets目錄詳解: http://blog.csdn.net/chuntiandejiaobu10/article/details/52352128

許可權配置

在 AndroidManifest.xml 中新增:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

其實我去掉後測試也可以成功執行.還是加上.預防萬一.

先讀配置:

方法一 讀取assets目錄下的配置

Properties props = new
 
 Properties();
props.load(context.getAssets().open(configName));

將configName檔案從assets目錄下放出來,放在main目錄下:

方法二  會出現錯誤 open failed: ENOENT (No such file or directory) 然而並不知道目錄路徑該如何填

Properties props = new Properties();
props.load(new FileInputStream(configName));

方法三  這樣就能成功執行

Properties props = new Properties();
props.load(context.openFileInput(configName));

修改配置:

Properties props = new Properties();
props.load(context.openFileInput(configPath));
props.setProperty(keyName, keyValue);

// 讀取assets目錄下的,但是根本無法修改
// FileOutputStream out = context.getAssets().openFd(configPath).createOutputStream();

// 提示 open failed: EROFS (Read-only file system) 
// FileOutputStream out = new FileOutputStream(configPath);

// 這樣就可以了
FileOutputStream out = context.openFileOutput(configPath,Context.MODE_PRIVATE);

參考Context.MODE_PRIVATE說明: http://www.cnblogs.com/yjpjy/p/5407251.html

完整程式碼

類

ProperTies 類

package com.lemon.demo.utils;

import android.content.Context;
import android.util.Log;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Properties;

public class ProperTies {
    //private static String configPath = getExternalStorageDirectory() + File.separator + "appConfig";
    private static String configPath = "appConfig";

    public static Properties getProperties(Context context) {
        Log.e("configPath", configPath);

        Properties urlProps;
        Properties props = new Properties();
        try {
            //方法一：通過activity中的context攻取setting.properties的FileInputStream
            //注意這地方的引數appConfig在eclipse中應該是appConfig.properties才對,但在studio中不用寫字尾
            //InputStream in = c.getAssets().open("appConfig.properties");

            //props.load(context.getAssets().open(configName));

            //方法二：通過class獲取setting.properties的FileInputStream
            //InputStream in = PropertiesUtill.class.getResourceAsStream("/assets/  setting.properties "));

            // 方法三
            props.load(context.openFileInput(configPath));
            // props.load(new FileInputStream(configPath));

        } catch (Exception e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }

        urlProps = props;
        return urlProps;
    }

    //儲存配置檔案
    public static String setProperties(Context context, String keyName, String keyValue) {
        Properties props = new Properties();
        try {
            props.load(context.openFileInput(configPath));
            props.setProperty(keyName, keyValue);
            // FileOutputStream out = context.getAssets().openFd(configPath).createOutputStream();
            FileOutputStream out = context.openFileOutput(configPath,Context.MODE_PRIVATE);
            // FileOutputStream out = new FileOutputStream(configPath);
            props.store(out, null);

        } catch (Exception e) {
            e.printStackTrace();
            Log.e("setPropertiesError", e.toString());
            return "修改配置檔案失敗!";
        }
        return "設定成功";
    }

}

UrlString類:

package com.lemon.demo.json;

import android.content.Context;
import com.lemon.demo.utils.ProperTies;

import java.util.Properties;

/**
 * 讀寫配置屬性類
 */

public class UrlString {

    private String contrastIPName = "contrastIP";

    // 上傳路徑
    private String ip;
    private String ipAddress;

    public void setIPAddress(Context context) {
        Properties proper = ProperTies.getProperties(context);
        this.ip = proper.getProperty(contrastIPName, "");
        this.ipAddress = "http://" + this.ip + "/index.html";
    }

    public String setIPAddress(Context context, String keyValue) {
        String result = ProperTies.setProperties(context, contrastIPName, keyValue);
        this.ip = keyValue;
        this.ipAddress = "http://" + this.ip + "/index.html";
        return result;
    }

    public String getIP() {
        return this.ip;
    }

    public String getIPAddress() {
        return this.ipAddress;
    }
}

在activity中使用:

載入配置檔案:

private UrlString urlString = new UrlString();

editText = (EditText) findViewById(R.id.et_ip);
// 載入配置的資訊 --- IP地址
urlString.setIPAddress(this);
editText.setText(urlString.getIP());

// 獲取完整地址
// urlString.getIPAddress()

修改配置檔案:

String value = editText.getText().toString();
String result = urlString.setIPAddress(this,value);

tools.customToast(result, ConfigActivity.this);