try to Invoke a method on an Object - Android java.lang.reflect

Android examples for java.lang.reflect:Method Invoke

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Description

try to Invoke a method on an Object

Demo Code


//package com.java2s;

import android.support.v4.util.SimpleArrayMap;
import android.util.Log;
import java.lang.reflect.Method;

public class Main {
    private final static String TAG = "DrawableReflectiveUtils";
    private static SimpleArrayMap<String, Method> sCachedMethods = new SimpleArrayMap<>();

    @SuppressWarnings("unchecked")
    public static <T> T tryInvoke(Object target, String methodName,
            Class<?>[] argTypes, Object... args) {

        try {/*from   w w w .  j  a  va 2s .  c  o m*/
            Method method = sCachedMethods.get(methodName);
            if (method != null) {
                return (T) method.invoke(target, args);
            }

            method = target.getClass().getDeclaredMethod(methodName,
                    argTypes);
            sCachedMethods.put(methodName, method);

            return (T) method.invoke(target, args);
        } catch (Exception pokemon) {
            Log.e(TAG, "Unable to invoke " + methodName + " on " + target,
                    pokemon);
        }

        return null;
    }
}

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