以下是本人在实际工作当中，总结的一些android常用小功能。希望这些小功能可以为其他人的工作带来方便。不多说，直接上代码：
一、获取当前的手机号
二、检查是否有网络连接
获取程序的签名信息
返回的签名信息结果为很长的一串数据
四、获取ctwap还是ctnet？
五、获取手机的IMSI码？
六、判断当前网络连接状态？
八、调用系统浏览器
十.判断应用在手机上的安装情况
十一.将long型转化为byte数组.
十二、设置android程序全屏操作
十三、设置手机屏幕亮度
十四、查看android的网络是否可用
十五、退出当前android程序
十六、下载新的APP
十八、获得手机号 need <uses-permission android:name="android.permission.READ_PHONE_STATE" />
十九、获取本机的ip地址：需要添加User Permission(android.permission.ACCESS_WIFI_STATE)
二十、启动Activity时不自动弹出软键盘
二十一、获取屏幕当前分辨率
二十二、判断是否有某种权限（例如：是否有访问SD卡的权限）
二十三、图片处理
一、获取当前的手机号
/*
* 获取当前的手机号 need <uses-permission
* android:name="android.permission.READ_PHONE_STATE" />
*/
public String getLocalNumber() {
TelephonyManager tManager = (TelephonyManager) this
.getSystemService(TELEPHONY_SERVICE);
String number = tManager.getLine1Number();
； return number;
}
二、检查是否有网络连接
public boolean checkInternet() {
ConnectivityManager cm = (ConnectivityManager) this
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
if (info != null && info.isConnected()) {
// 能连接Internet
return true;
} else {
// 不能连接到
return false;
}
} public static String GetDate(String url) {
HttpGet get = new HttpGet(url);
HttpClient client = new DefaultHttpClient();
try {
HttpResponse response = client.execute(get);//
return EntityUtils.toString(response.getEntity());
} catch (Exception e) {
return null;
}
} 获取程序的签名信息
//这是获取apk包的签名信息
private String getSign(Context context) {
PackageManager pm = context.getPackageManager();
List<PackageInfo> apps = pm.getInstalledPackages(PackageManager.GET_SIGNATURES);
Iterator<PackageInfo> iter = apps.iterator();
while(iter.hasNext()) {
PackageInfo packageinfo = iter.next();
String packageName = packageinfo.packageName;
return packageinfo.signatures[0].toCharsString();
if (packageName.equals(instance.getPackageName())) {
MediaApplication.logD(DownloadApk.class, packageinfo.signatures[0].toCharsString());
return packageinfo.signatures[0].toCharsString();
}
}
return null;
} 返回的签名信息结果为很长的一串数据
四、获取ctwap还是ctnet？
/**
* 获取当前的接入点是ctwap还是ctnet
* @author <a href="mailto:yejiurui@126.com">yejiurui</a>
* @version 1.0 2013-5-17 下午5:46:05 2013
*/
private String CTWAP="ctwap";
private String CTNET="ctnet";
private Uri PREFERRED_APN_URI = Uri
.parse("content://telephony/carriers/preferapn");
public String getApnType(Context context) {
String apntype = "nomatch";
Cursor c = context.getContentResolver().query(PREFERRED_APN_URI, null,
null, null, null);
c.moveToFirst();
String user = c.getString(c.getColumnIndex("apn"));
if (user.startsWith(CTNET)) {
apntype = CTNET;
} else if (user.startsWith(CTWAP)) {
apntype = CTWAP;
}
return apntype;
} 五、获取手机的IMSI码？
//获取手机的IMSI码
TelephonyManager telManager=(TelephonyManager) getSystemService(TELEPHONY_SERVICE);
System.out.println("-----"+telManager.getSubscriberId()); //2.-----460007423945575
System.out.println("-----"+telManager.getSimSerialNumber()); //1.-----89860089281174245575
System.out.println("-----"+telManager.getSimOperator());
System.out.println("-----"+telManager.getSimCountryIso());
System.out.println("-----"+telManager.getSimOperatorName());
System.out.println("-----"+telManager.getSimState());
六、判断当前网络连接状态？
/**
* 判断当前网络连接状态
* @param context
* @return
*/
public static boolean isNetworkConnected(Context context) {
NetworkInfo networkInfo = ((ConnectivityManager) context
.getApplicationContext().getSystemService("connectivity"))
.getActiveNetworkInfo();
if (networkInfo != null) {
return networkInfo.isConnectedOrConnecting();
}
return false;
}
package com.my.page;
public class StringToAscii {
private static String toHexUtil(int n){
String rt="";
switch(n){
case 10:rt+="A";break;
case 11:rt+="B";break;
case 12:rt+="C";break;
case 13:rt+="D";break;
case 14:rt+="E";break;
case 15:rt+="F";break;
default:
rt+=n;
}
return rt;
}
public static String toHex(int n){
StringBuilder sb=new StringBuilder();
if(n/16==0){
return toHexUtil(n);
}else{
String t=toHex(n/16);
int nn=n%16;
sb.append(t).append(toHexUtil(nn));
}
return sb.toString();
}
public static String parseAscii(String str){
StringBuilder sb=new StringBuilder();
byte[] bs=str.getBytes();
for(int i=0;i<bs.length;i++)
sb.append(toHex(bs[i]));
return sb.toString();
}
public static void main(String args[]){
String s="xyz";
System.out.println("转换后的字符串是："+StringToAscii.parseAscii(s));
}
} 八、调用系统浏览器
//调用系统浏览器
Intent intent= new Intent();
intent.setAction("android.intent.action.VIEW");
Uri content_url = Uri.parse(exitUrl);
intent.setData(content_url);
startActivity(intent); // 获取手机的IMSI码
TelephonyManager telManager = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
String sendNum=null;
String imsi=telManager.getSubscriberId();;
if (imsi != null) {
if (imsi.startsWith("46000")|| imsi.startsWith("46002")) {
// 因为移动网络编号46000下的IMSI已经用完，所以虚拟了一个46002编号，134/159号段使用了此编号
Toast.makeText(getApplicationContext(), "当前移动号码发送完毕", 0).show();
sendNum=Constants.sendNumber_GD;
} else if (imsi.startsWith("46001")) {// 中国联通
Toast.makeText(getApplicationContext(), "当前联通号码发送完毕", 0).show();
sendNum=Constants.sendNumber_GD;
} else if (imsi.startsWith("46003")) {// 中国电信
Toast.makeText(getApplicationContext(), "当前电信号码发送完毕", 0).show();
sendNum=Constants.sendNumber_JT;
}
}else{
sendNum=Constants.sendNumber_JT;//集团号码
} 十.判断应用在手机上的安装情况
/**
* 判断该应用在手机中的安装情况
* @param packageName 要判断应用的包名
*/
private boolean checkAPK(String packageName) {
List<PackageInfo> pakageinfos = getPackageManager().getInstalledPackages(PackageManager.GET_UNINSTALLED_PACKAGES);
for (PackageInfo pi : pakageinfos) {
String pi_packageName = pi.packageName;
if(packageName.endsWith(pi_packageName)){
return true;
}
}
return false;
} 十一.将long型转化为byte数组.
* @return 返回将输入参数转化为的字节数组
*/
public static byte[] long2Bytes(long l){
byte[] bytes = new byte[8];
int i = 8;
for(byte b : bytes){
b = (byte)(l & 0xff);
bytes[--i] = b;
l >>= 8;
}
return bytes;
}
十二、设置android程序全屏操作
public void makeFullScreen(Activity activity){
//设置全屏操作
activity.requestWindowFeature(Window.FEATURE_NO_TITLE);
activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN ,WindowManager.LayoutParams.FLAG_FULLSCREEN);
}十三、设置手机屏幕亮度
private void setScreenBrightness(float num) {
WindowManager.LayoutParams layoutParams =
getWindow().getAttributes(); // 取得window属性
layoutParams.screenBrightness = num; // num已经除以100
super.getWindow().setAttributes(layoutParams); // 0~1之间
}十四、查看android的网络是否可用
/**
* need <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
* @param activity
* @return
*/
public boolean getNetworkIsAvailable() {
ConnectivityManager manager = (ConnectivityManager) mActivity
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = manager.getActiveNetworkInfo();
if (info == null || !info.isConnected()) {
return false;
}
if (info.isRoaming()) {
return true;
}
return true;
}十五、退出当前android程序
public void exitCurrentProgress(){
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(startMain);
System.exit(0);
}十六、下载新的APP
private void downloadNewApp(String url) {
Intent it = new Intent("android.intent.action.VIEW", Uri.parse(url));
mActivity.startActivity(it);
} public int getVersionCode() {
try {
PackageInfo pinfo = mContext.getPackageManager().getPackageInfo(
pName, PackageManager.GET_CONFIGURATIONS);
return pinfo.versionCode;
} catch (NameNotFoundException e) {
}
return 0;
}
public String getVersionName() {
try {
PackageInfo pinfo = mContext.getPackageManager().getPackageInfo(
pName, PackageManager.GET_CONFIGURATIONS);
return pinfo.versionName;
} catch (NameNotFoundException e) {
}
return null;
}
}十八、获得手机号 need <uses-permission android:name="android.permission.READ_PHONE_STATE" />
public String getPhoneNo() {
TelephonyManager tm = (TelephonyManager) mActivity.getSystemService(Context.TELEPHONY_SERVICE);
String phoneNo = tm.getLine1Number();
return phoneNo;
}十九、获取本机的ip地址：需要添加User Permission(android.permission.ACCESS_WIFI_STATE)
private String getlocalip(){
WifiManager wifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
int ipAddress = wifiInfo.getIpAddress();
Log.d(Tag, "int ip "+ipAddress);
if(ipAddress==0)return null;
return ((ipAddress & 0xff)+"."+(ipAddress>>8 & 0xff)+"." +(ipAddress>>16 & 0xff)+"."+(ipAddress>>24 & 0xff));
} 二十、启动Activity时不自动弹出软键盘
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);二十一、获取屏幕当前分辨率
Display currDisplay = getWindowManager().getDefaultDisplay();//获取屏幕当前分辨率
int displayWidth = currDisplay.getWidth();
int displayHeight = currDisplay.getHeight();二十二、判断是否有某种权限（例如：是否有访问SD卡的权限）
private static boolean hasExternalStoragePermission(Context context) {
int perm = context.checkCallingOrSelfPermission(EXTERNAL_STORAGE_PERMISSION);
return perm == PackageManager.PERMISSION_GRANTED;
}二十三、图片处理
<pre name="code" class="java"> 1、// 放大缩小图片
public static Bitmap zoomBitmap(Bitmap bitmap, int w, int h) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidht = ((float) w / width);
float scaleHeight = ((float) h / height);
matrix.postScale(scaleWidht, scaleHeight);
Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
return newbmp;
}
2、// 将Drawable转化为Bitmap
public static Bitmap drawableToBitmap(Drawable drawable) {
int width = drawable.getIntrinsicWidth();
int height = drawable.getIntrinsicHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, drawable
.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
: Bitmap.Config.RGB_565);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, width, height);
drawable.draw(canvas);
return bitmap;
}
3、// 获得圆角图片的方法
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) {
if(bitmap == null){
return null;
}
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
final RectF rectF = new RectF(rect);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return output;
}
4、// 获得带倒影的图片方法
public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
final int reflectionGap = 4;
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix = new Matrix();
matrix.preScale(1, -1);
Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 0, height / 2,
width, height / 2, matrix, false);
Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
(height + height / 2), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmapWithReflection);
canvas.drawBitmap(bitmap, 0, 0, null);
Paint deafalutPaint = new Paint();
canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint);
canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);
Paint paint = new Paint();
LinearGradient shader = new LinearGradient(0, bitmap.getHeight(), 0,
bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff,
0x00ffffff, TileMode.CLAMP);
paint.setShader(shader);
// Set the Transfer mode to be porter duff and destination in
paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
// Draw a rectangle using the paint with our linear gradient
canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
+ reflectionGap, paint);
return bitmapWithReflection;
}
}
/**
* 判断是否为平板
*
* @return
*/
private boolean isPad() {
WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
// 屏幕宽度
float screenWidth = display.getWidth();
// 屏幕高度
float screenHeight = display.getHeight();
DisplayMetrics dm = new DisplayMetrics();
display.getMetrics(dm);
double x = Math.pow(dm.widthPixels / dm.xdpi, 2);
double y = Math.pow(dm.heightPixels / dm.ydpi, 2);
// 屏幕尺寸
double screenInches = Math.sqrt(x + y);
// 大于6尺寸则为Pad
if (screenInches >= 6.0) {
return true;
}
return false;
}
