Example usage for android.text TextUtils isEmpty

Introduction

In this page you can find the example usage for android.text TextUtils isEmpty.

Prototype

public static boolean isEmpty(@Nullable CharSequence str)

Source Link

Document

Returns true if the string is null or 0-length.

Usage

From source file:Main.java

public static boolean isApplicationInstalled(final Context context, final String pkgName) {
    if (TextUtils.isEmpty(pkgName)) {
        return false;
    }//  w  w  w  .  j a  v  a2  s . c o  m
    if (null == context) {
        throw new IllegalArgumentException("context may not be null.");
    }
    try {
        context.getPackageManager().getPackageInfo(pkgName, 0);
        return true;
    } catch (final NameNotFoundException e) {
        // Application not installed.
    }
    return false;
}

From source file:Main.java

public static void toastMessage(Context context, String text) {
    if (TextUtils.isEmpty(text)) {
        return;//from   ww  w . j av a2s  .c  o  m
    }
    Toast.makeText(context, text, Toast.LENGTH_SHORT).show();
}

From source file:Main.java

public static String getDeviceId(Context context) {
    String deviceId = "";
    if (context != null) {
        TelephonyManager tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (!TextUtils.isEmpty(tm.getDeviceId())) {
            deviceId = tm.getDeviceId();
        }/*  w w  w  .j a v  a  2s  . c  o m*/
    }
    return deviceId;
}

From source file:Main.java

@Nullable
@SuppressWarnings("unchecked")
public static <T> Class<? extends T> classForName(@NonNull String className, boolean allowEmptyName) {
    if (allowEmptyName && TextUtils.isEmpty(className)) {
        return null;
    }/*from   w w  w. j a va  2  s.c  o m*/

    try {
        return (Class<? extends T>) Class.forName(className);
    } catch (Exception e) {
        throw new RuntimeException(
                "An exception occurred while finding class for name " + className + ". " + e.getMessage());
    }
}

From source file:Main.java

public static Date getDateTime(String date) {
    Date originalReleaseDate = null;
    try {/* w  w w  .ja  v  a2 s .  c  o  m*/
        if (!TextUtils.isEmpty(date)) {
            originalReleaseDate = dateTimeFormat.parse(date);
        }
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return originalReleaseDate;
}

From source file:Main.java

public static final String getRawQueryParameter(Uri uri, String queryParameterName) {
    String ret = null;/*from w  ww .ja v a  2s.  co m*/

    if ((uri != null) && (!TextUtils.isEmpty(queryParameterName))) {
        final String query = uri.getEncodedQuery();
        if (query == null) {
            return null;
        }

        final String encodedKey = Uri.encode(queryParameterName, null);
        final int length = query.length();
        int start = 0;
        do {
            int nextAmpersand = query.indexOf('&', start);
            int end = nextAmpersand != -1 ? nextAmpersand : length;

            int separator = query.indexOf('=', start);
            if (separator > end || separator == -1) {
                separator = end;
            }

            if (separator - start == encodedKey.length()
                    && query.regionMatches(start, encodedKey, 0, encodedKey.length())) {
                if (separator == end) {
                    ret = "";
                } else {
                    ret = query.substring(separator + 1, end);
                }
                break;
            }

            // Move start to end of name.
            if (nextAmpersand != -1) {
                start = nextAmpersand + 1;
            } else {
                break;
            }
        } while (true);
    }

    return ret;
}

From source file:Main.java

static String getCallingPackageName(Activity activity) {
    // getCallingPackage() was unstable until android-18, use this
    String packageName = activity.getCallingActivity().getPackageName();
    if (TextUtils.isEmpty(packageName)) {
        packageName = activity.getIntent().getPackage();
    }/*from w  w  w  .  j  av a  2s .c om*/
    if (TextUtils.isEmpty(packageName)) {
        Log.e(activity.getPackageName(),
                "Received blank Panic.ACTION_DISCONNECT Intent, it must be sent using startActivityForResult()!");
    }
    return packageName;
}

From source file:Main.java

public static String getParam(Uri uri, String key, String defaultValue) {
    if (uri == null) {
        return defaultValue;
    }//from  w  w w.  jav  a2s .c o  m
    String value = null;
    try {
        value = uri.getQueryParameter(key);
    } catch (Exception e) {

    }

    if (TextUtils.isEmpty(value)) {
        value = defaultValue;
    }
    return value;
}

From source file:Main.java

public static String getRandom(String source, int length) {
    return TextUtils.isEmpty(source) ? null : getRandom(source.toCharArray(), length);
}