Android开发中常用到方法总结

1.判断服务是否在运行中
 public static boolean isServiceRunning(Context context,
String serviceName) {
  boolean isRunning =
false;
  ActivityManager activityManager = (ActivityManager)
context
    .getSystemService(Context.ACTIVITY_SERVICE);
  List<ActivityManager.RunningServiceInfo>
serviceList =
activityManager
    .getRunningServices(Integer.MAX_VALUE);
  if
(!(serviceList.size() > 0)) {
   return
false;
  }
  for (int i = 0; i <
serviceList.size(); i++) {
   RunningServiceInfo si =
(RunningServiceInfo) serviceList.get(i);
   if
(si.service.getClassName().equals(serviceName))
{
    isRunning =
true;
    break;
   }
  }
  return
isRunning;
 }

2.判断存储卡是否已插入
 public static boolean isExternalStorageAvailable()
{
  String state =
Environment.getExternalStorageState();
  if
(Environment.MEDIA_MOUNTED.equals(state)) {
   return
true;
  } else {
   return
false;
  }
 }

3.获得该文件的路径
 public static String getSDCardPath(String folderName)
{
  if(folderName!=null){
   String path =
Environment.getExternalStorageDirectory()
   .getAbsolutePath()
+ File.separator + folderName;
   File file = new
File(path);
   if (!file.exists())
{
    file.mkdir();
   }
   return
path;
  }else{
   return
null;
  }
 }

4.获得手机IMEI
 public static String getIMEI(Context ctx)
{
  if(ctx!=null){
   String imei =
"";
   TelephonyManager telephonyManager = (TelephonyManager)
ctx
     .getSystemService(Context.TELEPHONY_SERVICE);
   if
(telephonyManager != null)
    imei =
telephonyManager.getDeviceId();
   if (imei ==
"")
    imei = "0";
   return
imei;
  }else{
   return
null;
  }
 }

5.获得手机号
 public static String getPhoneNumber(Context ctx)
{
  if(ctx!=null){
   String number =
"";
   TelephonyManager telephonyManager = (TelephonyManager)
ctx
   .getSystemService(Context.TELEPHONY_SERVICE);
   if
(telephonyManager != null)
    number =
telephonyManager.getLine1Number();
   if (number ==
"")
    number = "0";
   return
number;
  }else{
   return
null;
  }
 }

6.得到手机状态信息
 public static String fetch_status(Context ctx)
{
  TelephonyManager tm = (TelephonyManager)
ctx
    .getSystemService(Context.TELEPHONY_SERVICE);//

String str = "";
  str += "DeviceId(IMEI) = " +
tm.getDeviceId() + "\n";
  str += "DeviceSoftwareVersion = " +
tm.getDeviceSoftwareVersion()
    +
"\n";
  str += "Line1Number = " + tm.getLine1Number() +
"\n";
  str += "NetworkCountryIso = " + tm.getNetworkCountryIso() +
"\n";
  str += "NetworkOperator = " + tm.getNetworkOperator() +
"\n";
  str += "NetworkOperatorName = " +
tm.getNetworkOperatorName() + "\n";
  str += "NetworkType = " +
tm.getNetworkType() + "\n";
  str += "honeType = " +
tm.getPhoneType() + "\n";
  str += "SimCountryIso = " +
tm.getSimCountryIso() + "\n";
  str += "SimOperator = " +
tm.getSimOperator() + "\n";
  str += "SimOperatorName = " +
tm.getSimOperatorName() + "\n";
  str += "SimSerialNumber = " +
tm.getSimSerialNumber() + "\n";
  str += "SimState = " +
tm.getSimState() + "\n";
  str += "SubscriberId(IMSI) = " +
tm.getSubscriberId() + "\n";
  str += "VoiceMailNumber = " +
tm.getVoiceMailNumber() + "\n";
  return str;
 }

7.得到软件版本信息
 public static String getSoftwareVersion(Context ctx)
{
  String version = "";
  try
{
   PackageInfo packageInfo =
ctx.getPackageManager().getPackageInfo(
     ctx.getPackageName(),
0);
   version = packageInfo.versionName;
  }
catch (PackageManager.NameNotFoundException e)
{
   e.printStackTrace();
  }
  return
version;
 }

8.得到当前日期
 public static String getCurrDate(String format)
{
  String str_format = (format == null || format == "") ?
"yyyy-MM-dd HH:mm:ss"
    : format;
  Date
date = new Date();
  SimpleDateFormat from = new
SimpleDateFormat(str_format);
  String times =
from.format(date);
  return times;
 }

9.根据URL获取bitmap
 public static Bitmap getURLBitmap(String uriPic)
throws Exception {
  URL imageUrl = null;
  Bitmap
bitmap = null;
  try {
   imageUrl = new
URL(uriPic);
  } catch (MalformedURLException e)
{
   e.printStackTrace();
  }
  try
{
   HttpURLConnection conn = (HttpURLConnection)
imageUrl
     .openConnection();
   conn.setConnectTimeout(5*1000);
   
  conn.setReadTimeout(5*1000);
   
  conn.setDoInput(true);
   
  conn.setDoOutput(true);
   
  conn.setUseCaches(true);
   
  conn.setRequestMethod("POST");
   conn.connect();
   InputStream
is = conn.getInputStream();
   bitmap =
BitmapFactory.decodeStream(is);
   is.close();
  }
catch (IOException e)
{
   e.printStackTrace();
  }
  return
bitmap;
 }

10.隐藏app
 public static void HiddenApp(Context ctx)
{
  PackageManager pm =
ctx.getPackageManager();
  ResolveInfo homeInfo =
pm.resolveActivity(
    new
Intent(Intent.ACTION_MAIN)
      .addCategory(Intent.CATEGORY_HOME),
0);
  ActivityInfo ai =
homeInfo.activityInfo;
  Intent startIntent = new
Intent(Intent.ACTION_MAIN);
  startIntent.addCategory(Intent.CATEGORY_LAUNCHER);
  startIntent.setComponent(new
ComponentName(ai.packageName,
ai.name));
  ctx.startActivity(startIntent);
 }

11.退出程序（3种方法）
 public static void ExitApp(Context ctx) {

ActivityManager am =
(ActivityManager)
  ctx.getSystemService(Context.ACTIVITY_SERVICE);
  am.restartPackage(ctx.getPackageName());
  
  Intent
startMain = new
Intent(Intent.ACTION_MAIN);
  startMain.addCategory(Intent.CATEGORY_HOME);
  startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
  ctx.startActivity(startMain);
  android.os.Process.killProcess(android.os.Process.myPid());
  System.exit(0);
  
  android.os.Process.killProcess(android.os.Process.myPid());
 }

12.查询手机中所有非系统应用

public static
List<PackageInfo> getAllApps(Context context) {

List<PackageInfo> apps = new
ArrayList<PackageInfo>();

PackageManager pManager = context.getPackageManager();

//获取手机内所有应用

List<PackageInfo> paklist =
pManager.getInstalledPackages(0);

for (int i =
0; i < paklist.size(); i++) {

PackageInfo pak = (PackageInfo) paklist.get(i);

//判断是否为非系统预装的应用程序

if ((pak.applicationInfo.flags &
pak.applicationInfo.FLAG_SYSTEM) <= 0)
{

// customs applications

apps.add(pak);

}

}

return apps;

}

13.查询手机内所有支持分享的应用

public static List<ResolveInfo> getShareApps(Context
context)
 {
  List<ResolveInfo> mApps = new
ArrayList<ResolveInfo>();
  Intent intent = new
Intent(Intent.ACTION_SEND,
null);
  intent.addCategory(Intent.CATEGORY_DEFAULT);
  intent.setType("text/plain");
  PackageManager
pManager = context.getPackageManager();
  mApps =
pManager
    .queryIntentActivities(intent,
PackageManager.COMPONENT_ENABLED_STATE_DEFAULT);
  return
mApps;
 }

14.获取 Andorid 手机WIFI连接的Mac地址和IP地址

public static String
getInfo()

{

WifiManager wifi = (WifiManager)
getSystemService(Context.WIFI_SERVICE);

WifiInfo info = wifi.getConnectionInfo();

String maxText = info.getMacAddress();

String ipText = intToIp(info.getIpAddress());

String status = "";

if (wifi.getWifiState() ==
WifiManager.WIFI_STATE_ENABLED)

{

status = "WIFI_STATE_ENABLED";

}

String ssid = info.getSSID();

int networkID = info.getNetworkId();

int speed = info.getLinkSpeed();

return "mac：" + maxText + "\n\r"

+ "ip：" + ipText + "\n\r"

+ "wifi status :" + status +
"\n\r"

+ "ssid :" + ssid + "\n\r"

+ "net work id :" + networkID +
"\n\r"

+ "connection speed:" + speed +
"\n\r"

;

}

15.获取手机上所有非系统应用

public static ArrayList<AppInfo>
getInstalledPackages(Context context)

{

ArrayList<AppInfo> appList = new ArrayList<AppInfo>();

List<PackageInfo> packages = context.getPackageManager()

.getInstalledPackages(0);

for (int i = 0; i < packages.size(); i++)

{

PackageInfo packageInfo = packages.get(i);

AppInfo tmpInfo = new AppInfo();

tmpInfo.appName = packageInfo.applicationInfo.loadLabel(

context.getPackageManager()).toString();

tmpInfo.packageName = packageInfo.packageName;

tmpInfo.versionName = packageInfo.versionName;

tmpInfo.versionCode = packageInfo.versionCode;

tmpInfo.appIcon = packageInfo.applicationInfo

.loadIcon(context.getPackageManager());

if((packageInfo.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM)==0)

{

//如果非系统应用，则添加至appList

appList.add(tmpInfo);

}

}

return appList;

}

16.将流转成字节数组

public byte[] stream2Bytes(InputStream is) throws IOException {

byte[] mByte;

ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int length = 0;

while ((length = is.read(buffer, 0, 1024)) != -1) {

baos.write(buffer, 0, length);

}

baos.flush();

mByte = baos.toByteArray();

baos.close();

return mByte;

}

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