android常用代码

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..
<string name="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();