Collection of classic code snippets commonly used in Android development

Bitmap bitmapOrg = (().getResources(), );
Matrix matrix = new Matrix();
(-90);//The rotation angleBitmap resizedBitmap = (bitmapOrg, 0, 0,
          (), (), matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

//Create phone managementTelephonyManager tm = (TelephonyManager)
//Create a connection with the mobile phone(Context.TELEPHONY_SERVICE);
//Get mobile phone numberString phoneId = tm.getLine1Number();
//Remember to add it in the manifest file<uses-permission
android:name=".READ_PHONE_STATE" />
//The program cannot be implemented on the simulator, and you must connect to the mobile phone

// in ..
<string name="my_text">Thanks for visiting %s. You age is %d!</string>
// and in the java code:
(getString(.my_text), "oschina", 33);

/** Full screen setting, hide all decorations in the window */
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(.FLAG_FULLSCREEN,
        .FLAG_FULLSCREEN);

<activity android:name="." android:label="@string/label_net_Edit"
      android:screenOrientation="portrait" android:theme="@android:style/">
 <intent-filter>
 <action android:name=".Net_Edit" />
 <category android:name="" />
 </intent-filter>
</activity>

android:theme="@android:style/"

ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE);
boolean wifi=(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
boolean internet=(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();

<uses-permission android:name=".ACCESS_NETWORK_STATE" />

public static boolean isIntentAvailable(Context context, String action) {
  final PackageManager packageManager = ();
  final Intent intent = new Intent(action);
  List<ResolveInfo> list =
      (intent,
          PackageManager.MATCH_DEFAULT_ONLY);
  return () > 0;
}

try {
  Intent intent = new Intent(Intent.ACTION_CALL);
  (("tel:+110"));
  startActivity(intent);
} catch (Exception e) {
  ("SampleApp", "Failed to invoke call", e);
}

Intent i = new Intent(Intent.ACTION_SEND);
//("text/plain"); //Please use this line for the emulator("message/rfc822") ; // Use this line on real machine(Intent.EXTRA_EMAIL, new String[]{"test@","test@});
(Intent.EXTRA_SUBJECT,"subject goes here");
(Intent.EXTRA_TEXT,"body goes here");
startActivity((i, "Select email application."));

Intent viewIntent = new
  Intent("",(""));
startActivity(viewIntent);

String android_id = (getContext().getContentResolver(), Secure.ANDROID_ID);

public String getLocalIpAddress() {
  try {
    for (Enumeration<NetworkInterface> en = ();
 ();) {
      NetworkInterface intf = ();
      for (Enumeration<InetAddress> enumIpAddr = ();
 ();) {
        InetAddress inetAddress = ();
        if (!()) {
          return ().toString();
        }
      }
    }
  } catch (SocketException ex) {
    (LOG_TAG, ());
  }
  return null;
}

/** Get the memory card path */
File sdcardDir=();
/** StatFs depends on file system space usage */
StatFs statFs=new StatFs(());
/** Block's size*/
Long blockSize=();
/** Total Block Number */
Long totalBlocks=();
/** Number of blocks used */
Long availableBlocks=();

private Uri insertContact(Context context, String name, String phone) {
    ContentValues values = new ContentValues();
    (, name);
    Uri uri = getContentResolver().insert(People.CONTENT_URI, values);
    Uri numberUri = (uri, .CONTENT_DIRECTORY);
    ();
    (, .TYPE_MOBILE);
    (, phone);
    getContentResolver().insert(numberUri, values);
    return uri;
}

Intent intentBatteryUsage = new Intent(Intent.ACTION_POWER_USAGE_SUMMARY);
startActivity(intentBatteryUsage);

ActivityManager mActivityManager = (ActivityManager) (ACTIVITY_SERVICE);
List<> mRunningProcess = ();
int i = 1;
for ( amProcess : mRunningProcess) {
 ("homer Application", (i++) + " PID = " +  + "; processName = " + );
}