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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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Android开发中常用到方法总结