记录自己的成长经历，帮助自己慢慢提升。
一，功能实现一键连接指定wifi
1，工具类操作wifi管理者的对象
package com.alltosun.fishing.app.utils;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.util.Log;
import java.util.List;
/**
* Created by Lenovo on 2017/3/30.
*/
public class WifiAdmin {
// 定义WifiManager对象
private WifiManager mWifiManager;
// 定义WifiInfo对象
private WifiInfo mWifiInfo;
// 扫描出的网络连接列表
private List<ScanResult> mWifiList;
// 网络连接列表
private List<WifiConfiguration> mWifiConfiguration;
// 定义一个WifiLock
WifiManager.WifiLock mWifiLock;
// 构造器
public WifiAdmin(Context context) {
// 取得WifiManager对象
mWifiManager = (WifiManager) context
.getSystemService(Context.WIFI_SERVICE);
// 取得WifiInfo对象
mWifiInfo = mWifiManager.getConnectionInfo();
}
// 打开WIFI
public void openWifi() {
if (!mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(true);
}
}
// 关闭WIFI
public void closeWifi() {
if (mWifiManager.isWifiEnabled()) {
mWifiManager.setWifiEnabled(false);
}
}
// 检查当前WIFI状态
public int checkState() {
return mWifiManager.getWifiState();
}
// 锁定WifiLock
public void acquireWifiLock() {
mWifiLock.acquire();
}
// 解锁WifiLock
public void releaseWifiLock() {
// 判断时候锁定
if (mWifiLock.isHeld()) {
mWifiLock.acquire();
}
}
// 创建一个WifiLock
public void creatWifiLock() {
mWifiLock = mWifiManager.createWifiLock("Test");
}
// 得到配置好的网络
public List<WifiConfiguration> getConfiguration() {
return mWifiConfiguration;
}
// 指定配置好的网络进行连接
public void connectConfiguration(int index) {
// 索引大于配置好的网络索引返回
if (index > mWifiConfiguration.size()) {
return;
}
// 连接配置好的指定ID的网络
mWifiManager.enableNetwork(mWifiConfiguration.get(index).networkId,
true);
}
public void startScan() {
mWifiManager.startScan();
// 得到扫描结果
mWifiList = mWifiManager.getScanResults();
// 得到配置好的网络连接
mWifiConfiguration = mWifiManager.getConfiguredNetworks();
}
// 得到网络列表
public List<ScanResult> getWifiList() {
mWifiList = mWifiManager.getScanResults();
return mWifiList;
}
// 查看扫描结果
public StringBuilder lookUpScan() {
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < mWifiList.size(); i++) {
stringBuilder
.append("Index_" + new Integer(i + 1).toString() + ":");
// 将ScanResult信息转换成一个字符串包
// 其中把包括：BSSID、SSID、capabilities、frequency、level
stringBuilder.append((mWifiList.get(i)).toString());
stringBuilder.append("/n");
}
return stringBuilder;
}
// 得到MAC地址
public String getMacAddress() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.getMacAddress();
}
// 得到接入点的BSSID
public String getBSSID() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.getBSSID();
}
// 得到IP地址
public int getIPAddress() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getIpAddress();
}
// 得到连接的ID
public int getNetworkId() {
return (mWifiInfo == null) ? 0 : mWifiInfo.getNetworkId();
}
// 得到WifiInfo的所有信息包
public String getWifiInfo() {
return (mWifiInfo == null) ? "NULL" : mWifiInfo.toString();
}
// 添加一个网络并连接
public void addNetwork(WifiConfiguration wcg) {
int wcgID = mWifiManager.addNetwork(wcg);
boolean b = mWifiManager.enableNetwork(wcgID, true);
System.out.println("a--" + wcgID);
System.out.println("b--" + b);
}
// 断开指定ID的网络
public void disconnectWifi(int netId) {
mWifiManager.disableNetwork(netId);
mWifiManager.disconnect();
}
//然后是一个实际应用方法，只验证过没有密码的情况：
public WifiConfiguration CreateWifiInfo(String SSID, String Password, int Type,String BSSID)
{
WifiConfiguration config = new WifiConfiguration();
config.allowedAuthAlgorithms.clear();
config.allowedGroupCiphers.clear();
config.allowedKeyManagement.clear();
config.allowedPairwiseCiphers.clear();
config.allowedProtocols.clear();
config.SSID = "\"" + SSID + "\"";
//config.BSSID=SSID;
WifiConfiguration tempConfig = this.IsExsits(SSID);
if(tempConfig != null) {
mWifiManager.removeNetwork(tempConfig.networkId);
}
if(Type == 1) //WIFICIPHER_NOPASS
{
config.wepKeys[0] = "";
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if(Type == 2) //WIFICIPHER_WEP
{
config.hiddenSSID = true;
config.wepKeys[0]=Password;
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
config.wepTxKeyIndex = 0;
}
if(Type == 3) //WIFICIPHER_WPA
{
Log.i("一键上网",SSID+"/"+Password+"/"+Type+"/"+BSSID);
config.preSharedKey = "\""+Password+"\"";
config.hiddenSSID = true;
config.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
config.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
//config.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
config.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
config.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
config.status = WifiConfiguration.Status.ENABLED;
config.BSSID=BSSID;
}
return config;
}
private WifiConfiguration IsExsits(String SSID)
{
List<WifiConfiguration> existingConfigs = mWifiManager.getConfiguredNetworks();
for (WifiConfiguration existingConfig : existingConfigs)
{
if (existingConfig.SSID.equals("\""+SSID+"\""))
{
return existingConfig;
}
}
return null;
}
}
//分为三种情况：1没有密码2用wep加密3用wpa加密
wifiAdmin = new WifiAdmin(getActivity());//初始化
wifiAdmin.openWifi();//打开wifi
List<ScanResult> list = wifiAdmin.getWifiList();//获取wifi列表
连接wifi：
for (ScanResult scanResult : list) {
//遍历
if (scanResult.SSID.equals("alltosun.com")) {
//判断是否是指定wifi
wifiAdmin.addNetwork(wifiAdmin.CreateWifiInfo(scanResult.SSID,
"alltosun2015", 3, scanResult.BSSID));//连接wifi
}
}
断开wifi:
wifiAdmin.disconnectWifi(wifiAdmin.getNetworkId());
二，android，代码实现截屏功能
/**
* 生成视图的预览
* @param activity
* @param v
* @return 视图生成失败返回null
* 视图生成成功返回视图的绝对路径
*/
public static Bitmap savebitmap(Activity activity,View v){
Bitmap bitmap;
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "preview.png";
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
bitmap = view.getDrawingCache();//到这里截取的是全屏
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int[] location = new int[2];
v.getLocationOnScreen(location);
//这里就是需要截取的控件
bitmap = Bitmap.createBitmap(bitmap, location[0], location[1], v.getWidth(), v.getHeight());
return bitmap;
}
三 gradle总结
1，新的电脑安装一个新的android studio 并新建项目，会一直停在加载状态解决方法：
C:\Users\Administrator\.gradle\wrapper\dists
找到这个目录，看看这个目录下的gralde版本是多少；
打开下面的网址，下载相对于的gradle版本压缩包
http://www.androiddevtools.cn/index.html；
把下载的压缩包放到下面的目录
C:\Users\Administrator\.gradle\wrapper\dists\gradle-
2.14.1-all\8bnwg5hd3w55iofp58khbp6yv
重启android stuido 即可
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