Example usage for java.lang.reflect Method invoke

Introduction

In this page you can find the example usage for java.lang.reflect Method invoke.

Prototype

@CallerSensitive
@ForceInline 
@HotSpotIntrinsicCandidate
public Object invoke(Object obj, Object... args)
        throws IllegalAccessException, IllegalArgumentException, InvocationTargetException

Source Link

Document

Invokes the underlying method represented by this Method object, on the specified object with the specified parameters.

Usage

From source file:Main.java

private static synchronized BluetoothSocket getRfcommSocketByReflection(BluetoothDevice device)
        throws Exception {
    if (device == null)
        return null;
    Method m = device.getClass().getMethod("createRfcommSocket", new Class[] { int.class });

    return (BluetoothSocket) m.invoke(device, 1);
}

From source file:Main.java

public static Object invoke(final Object receiver, final Object defaultValue, final Method method,
        final Object... args) {
    if (method == null) {
        return defaultValue;
    }/*  www  . ja  v a2 s  .c om*/
    try {
        return method.invoke(receiver, args);
    } catch (final IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
        Log.e(TAG, "Exception in invoke", e);
    }
    return defaultValue;
}

From source file:ExceptionUtils.java

/**
 * Set the cause of the Exception.  Will detect if this is not allowed.
 * @param onObject//  www . java 2s .  c  o m
 * @param cause
 */
public static void setCause(Throwable onObject, Throwable cause) {
    if (causesAllowed) {
        try {
            Method method = onObject.getClass().getMethod("initCause", new Class[] { Throwable.class });
            method.invoke(onObject, new Object[] { cause });
        } catch (RuntimeException e) {
            throw e;
        } catch (Exception e) {
            causesAllowed = false;
        }
    }
}

From source file:Main.java

public static void forceStopPackage(Context ctx, String packageName) {

    ActivityManager am = (ActivityManager) ctx.getSystemService(Context.ACTIVITY_SERVICE);

    Method method;
    try {/* w w  w.  j  a v a  2 s. c  om*/
        method = Class.forName("android.app.ActivityManager").getMethod("forceStopPackage", String.class);
        method.invoke(am, packageName);
    } catch (NoSuchMethodException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

From source file:URLUtilities.java

/**
 * Calls <code>java.net.URLEncoder.encode(String, String)</code> via
 * reflection, if we are running on JRE 1.4 or later, otherwise reverts to
 * the deprecated <code>URLEncoder.encode(String)</code> method.
 *
 * @param s  the string to encode./*from w  ww.  j  a va 2  s .c o  m*/
 * @param encoding  the encoding.
 *
 * @return The encoded string.
 *
 * @since 1.0.6
 */
public static String encode(String s, String encoding) {
    Class c = URLEncoder.class;
    String result = null;
    try {
        Method m = c.getDeclaredMethod("encode", STRING_ARGS_2);
        try {
            result = (String) m.invoke(null, new Object[] { s, encoding });
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    } catch (NoSuchMethodException e) {
        // we're running on JRE 1.3.1 so this is the best we have...
        result = URLEncoder.encode(s);
    }
    return result;
}

From source file:oz.hadoop.yarn.api.utils.ConfigUtils.java

/**
 * Will dynamically add configuration directory to the classpath.
 * /*  w  w  w .j  a v a  2 s  .co m*/
 * @param configurationDirectoryPath
 */
public static void addToClasspath(File configurationDirectoryPath) {
    Assert.notNull(configurationDirectoryPath, "'configurationDirectoryPath' must not be null");
    Assert.isTrue(configurationDirectoryPath.exists(), "'configurationDirectoryPath' must exist");
    Assert.isTrue(configurationDirectoryPath.isDirectory(), "'configurationDirectoryPath' must be a directory");

    URL configUrl = null;
    try {
        configUrl = new URL("file:" + configurationDirectoryPath.getAbsolutePath() + "/");
    } catch (Exception e) {
        throw new IllegalArgumentException("Failed to construct URL for " + configurationDirectoryPath, e);
    }
    URLClassLoader cl = (URLClassLoader) ClassLoader.getSystemClassLoader();
    Method addUrlMethod = ReflectionUtils.getMethodAndMakeAccessible(URLClassLoader.class, "addURL", URL.class);
    try {
        addUrlMethod.invoke(cl, configUrl);
    } catch (Exception e) {
        throw new IllegalStateException("Failed to add URL: " + configUrl + " to the classpath", e);
    }
}

From source file:com.android.fastergallery.common.HttpClientFactory.java

/**
 * Closes an HttpClient.// w  w w .  java 2 s  .co m
 */
public static void close(HttpClient client) {
    // AndroidHttpClient is available on all platform releases,
    // but is hidden until API Level 8
    try {
        Class<?> clazz = client.getClass();
        Method method = clazz.getMethod("close", (Class<?>[]) null);
        method.invoke(client, (Object[]) null);
    } catch (InvocationTargetException e) {
        throw new RuntimeException(e);
    } catch (NoSuchMethodException e) {
        throw new RuntimeException(e);
    } catch (IllegalAccessException e) {
        throw new RuntimeException(e);
    }
}

From source file:Main.java

private static String getSystemProperty(String key, String def) {
    try {//  w  ww .j  a  v a2  s . com
        final ClassLoader cl = ClassLoader.getSystemClassLoader();
        final Class<?> SystemProperties = cl.loadClass("android.os.SystemProperties");
        final Class<?>[] paramTypes = new Class[] { String.class, String.class };
        final Method get = SystemProperties.getMethod("get", paramTypes);
        final Object[] params = new Object[] { key, def };
        return (String) get.invoke(SystemProperties, params);
    } catch (Exception e) {
        return def;
    }
}

From source file:com.yahoo.sql4d.sql4ddriver.BaseMapper.java

/**
 * More granular(sets the property of a bean based on a json key value
 * pair).//w  w  w.  j a  va 2  s . c  o m
 *
 * @param bean
 * @param key
 * @param value
 * @throws NoSuchMethodException
 * @throws IllegalAccessException
 * @throws IllegalArgumentException
 * @throws InvocationTargetException
 */
public static void applyKVToBean(Object bean, String key, Object value) throws NoSuchMethodException,
        IllegalAccessException, IllegalArgumentException, InvocationTargetException {
    Method getterMethod = bean.getClass().getMethod(Util.getterMethodName(key));
    Method setterMethod = bean.getClass().getMethod(Util.setterMethodName(key), getterMethod.getReturnType());
    setterMethod.invoke(bean, value);
}

From source file:Main.java

public static Application getApp() {
    if (myApp == null) {
        try {//from w ww  . j a v a 2 s  .  com
            final Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");
            final Method method = activityThreadClass.getMethod("currentApplication");
            myApp = (Application) method.invoke(null, (Object[]) null);
        } catch (Exception e) {
            // handle exception
        }
    }
    // below gives me /mnt/sdcard/Android/data/com.hyperionics.pdfxTest/cache/tmpPdfx
    // File file = new File(app.getApplicationContext().getExternalCacheDir(), "tmpPdfx");
    return myApp;
}