开发过程中，经常用到的一些Android代码片段，在此分享一下，希望对大家有所帮助.... 1、图片旋转:
Bitmap bitmapOrg = BitmapFactory.decodeResource(this.getContext().getResources(), R.drawable.moon); Matrix matrix = new Matrix(); matrix.postRotate(-90);//旋转的角度 Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0, bitmapOrg.getWidth(), bitmapOrg.getHeight(), matrix, true); BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
2、获取手机号码://创建电话管理 TelephonyManager tm = (TelephonyManager) //与手机建立连接 activity.getSystemService(Context.TELEPHONY_SERVICE); //获取手机号码 String phoneId = tm.getLine1Number(); //记得在manifest file中添加 <uses-permission android:name="android.permission.READ_PHONE_STATE" /> //程序在模拟器上无法实现，必须连接手机
3.格式化string.xml 中的字符串:// in strings.xml.. <stringCOLOR: #8b0000">my_text">Thanks for visiting %s. You age is %d!</string> // and in the java code: String.format(getString(R.string.my_text), "oschina", 33);
4、android设置全屏的方法: A.在java代码中设置/** 全屏设置，隐藏窗口所有装饰 */ requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
B、在AndroidManifest.xml中配置<activity android:name=".Login.NetEdit" android:label="@string/label_net_Edit" android:screenOrientation="portrait" android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"> <intent-filter> <action android:name="android.intent.Net_Edit" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity>
5、设置Activity为Dialog的形式:在AndroidManifest.xml中配置Activity节点是配置theme如下：
android:theme="@android:style/Theme.Dialog"
6、检查当前网络是否连上：ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE); boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting(); boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
在AndroidManifest.xml 增加权限：
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
7、检测某个Intent是否有效：public static boolean isIntentAvailable(Context context, String action) { final PackageManager packageManager = context.getPackageManager(); final Intent intent = new Intent(action); List<ResolveInfo> list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY); return list.size() > 0; }
8、android 拨打电话：try { Intent intent = new Intent(Intent.ACTION_CALL); intent.setData(Uri.parse("tel:+110")); startActivity(intent); } catch (Exception e) { Log.e("SampleApp", "Failed to invoke call", e); }
9、android中发送Email：Intent i = new Intent(Intent.ACTION_SEND); //i.setType("text/plain"); //模拟器请使用这行 i.setType("message/rfc822") ; // 真机上使用这行 i.putExtra(Intent.EXTRA_EMAIL, new String[]{"test@gmail.com","test@163.com}); i.putExtra(Intent.EXTRA_SUBJECT,"subject goes here"); i.putExtra(Intent.EXTRA_TEXT,"body goes here"); startActivity(Intent.createChooser(i, "Select email application."));
10、android中打开浏览器：Intent viewIntent = new Intent("android.intent.action.VIEW",Uri.parse("")); startActivity(viewIntent);
11、android 获取设备唯一标识码：String android_id = Secure.getString(getContext().getContentResolver(), Secure.ANDROID_ID);
12、android中获取IP地址：public String getLocalIpAddress() { try { for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) { NetworkInterface intf = en.nextElement(); for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) { InetAddress inetAddress = enumIpAddr.nextElement(); if (!inetAddress.isLoopbackAddress()) { return inetAddress.getHostAddress().toString(); } } } } catch (SocketException ex) { Log.e(LOG_TAG, ex.toString()); } return null; }
13、android获取存储卡路径以及使用情况：