手机常用方法， 获取电池电量，信号强度，sd存储容量等
packagecom.nancal.pdaclient.util;
importjava.io.File;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.IntentFilter;
importandroid.net.wifi.WifiInfo;
importandroid.net.wifi.WifiManager;
importandroid.os.BatteryManager;
importandroid.os.Environment;
importandroid.os.StatFs;
importandroid.telephony.TelephonyManager;
publicclassPhoneStateUtil{
privatestaticfinalStringERROR="找不到存储设备";
//获取wifi信号强度
publicStringgetWifiStatus(Contextcontext){
Stringresult=null;
WifiManagerwm=(WifiManager)context
.getSystemService(Context.WIFI_SERVICE);
WifiInfoconnectionInfo=wm.getConnectionInfo();
intrssi=connectionInfo.getRssi();
System.out.println("signal"+rssi);
if(rssi>-50){
result="wifi信号良好";
}elseif(rssi<=-50&&rssi>70){
result="wifi信号较差";
}elseif(rssi<=-70){
result="wifi信号极差，有可能连接不上";
}
returnresult;
}
//获取电池电量
publicStringgetBatteryStatus(Contextcontext){
IntentFilterifilter=newIntentFilter(Intent.ACTION_BATTERY_CHANGED);
IntentbatteryStatus=context.registerReceiver(null,ifilter);
intlevel=batteryStatus.getIntExtra(BatteryManager.EXTRA_LEVEL,-1);
intscale=batteryStatus.getIntExtra(BatteryManager.EXTRA_SCALE,-1);
return((float)level/(float)scale)*100.0f+"%";
}
//获取3G网网速
publicStringget3Gstatus(Contextcontext){
Stringresult=null;
TelephonyManagertelephonyManager=(TelephonyManager)context
.getSystemService(Context.TELEPHONY_SERVICE);
intdataState=telephonyManager.getDataState();
if(dataState!=2){
result="移动网络已经关闭，请打开网络";
returnresult;
}
intnetworkType=telephonyManager.getNetworkType();
switch(networkType){
case1:
result="3g网速极差，小于128K";
break;
case2:
result="3g网速较差，在128K到236k之间";
break;
case3:
result="3g网速良好，在236k到2M之间";
break;
default:
break;
}
returnresult;
}
//是否有外部存储设备
publicstaticbooleanexternalMemoryAvailable(){
returnandroid.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED);
}
//获取内部存储设备可用容量
publicstaticStringgetAvailableInternalMemorySize(){
Filepath=Environment.getDataDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longavailableBlocks=stat.getAvailableBlocks();
returnformatSize(availableBlocks*blockSize);
}
//获取内部存储设备总容量
publicstaticStringgetTotalInternalMemorySize(){
Filepath=Environment.getDataDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longtotalBlocks=stat.getBlockCount();
returnformatSize(totalBlocks*blockSize);
}
//获取外部存储可用的容量
publicstaticStringgetAvailableExternalMemorySize(){
if(externalMemoryAvailable()){
Filepath=Environment.getExternalStorageDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longavailableBlocks=stat.getAvailableBlocks();
returnformatSize(availableBlocks*blockSize);
}else{
returnERROR;
}
}
//获取外部存储总容量
publicstaticStringgetTotalExternalMemorySize(){
if(externalMemoryAvailable()){
Filepath=Environment.getExternalStorageDirectory();
StatFsstat=newStatFs(path.getPath());
longblockSize=stat.getBlockSize();
longtotalBlocks=stat.getBlockCount();
returnformatSize(totalBlocks*blockSize);
}else{
returnERROR;
}
}
//把byte单位转换成M
publicstaticStringformatSize(longsize){
Stringsuffix=null;
if(size>=1024){
suffix="KB";
size/=1024;
if(size>=1024){
suffix="MB";
size/=1024;
}
}
StringBuilderresultBuffer=newStringBuilder(Long.toString(size));
intcommaOffset=resultBuffer.length()-3;
while(commaOffset>0){
resultBuffer.insert(commaOffset,',');
commaOffset-=3;
}
if(suffix!=null)
resultBuffer.append(suffix);
returnresultBuffer.toString();
}
}