java\u4e2d\u7684\u53cd\u5c04\u673a\u5236\uff1a\u53ea\u8981\u7ed9\u5b9a\u7c7b\u7684\u540d\u5b57\u5c31\u53ef\u4ee5\u5f97\u5230\u6240\u6709\u7c7b\u7684\u4fe1\u606f\u3002\u56e0\u4e3a\u8fd9\u4e2a\u7c7b\u7684\u540d\u5b57\u662f\u53ef\u4ee5\u5728\u4ee3\u7801\u8fd0\u884c\u65f6\u52a8\u6001\u6307\u5b9a\u7684\uff0c\u6240\u4ee5\u5229\u7528java\u7684\u53cd\u5c04\u673a\u5236\u6bd4\u901a\u8fc7new\u7684\u65b9\u5f0f\u8981\u7075\u6d3b\u7684\u591a<\/p>\n
\u5728java\u4e2d\uff0c\u901a\u8fc7new\u7684\u65b9\u5f0f\u521b\u5efa\u7684\u5bf9\u8c61\u79f0\u4e3a\u9759\u6001\u52a0\u8f7d\uff08\u7f16\u8bd1\u65f6\u52a0\u8f7d\u7c7b),\u901a\u8fc7\u53cd\u5c04\u673a\u5236\u521b\u5efa\u5bf9\u8c61\u79f0\u4e3a\u52a8\u6001\u52a0\u8f7d\uff08\u8fd0\u884c\u65f6\u52a0\u8f7d\u7c7b)<\/p>\n
java\u53cd\u5c04\u673a\u5236\u7684\u4f7f\u7528\u65b9\u5f0f<\/p>\n
\u8fd9\u91cc\u6709\u4e2aHuman\u7c7b\u5982\u4e0b<\/p>\n
package com.myway5;<\/p>\n
public class Human {
\n private String name;
\n private int age;
\n public String word;<\/p>\n
public Human() {\n \/\/ TODO Auto-generated constructor stub\n}\n\npublic Human(String name) {\n this.name = name;\n}\n\npublic Human(String name, int age) {\n this.name = name;\n this.age = age;\n}\n\npublic String getName() {\n return name;\n}\n\npublic void setName(String name) {\n this.name = name;\n}\n\npublic int getAge() {\n return age;\n}\n\npublic void setAge(int age) {\n this.age = age;\n}\npublic void speak(String word) {\n System.out.println(word);\n }\n<\/code><\/pre>\n}
\n\u6211\u4eec\u4f7f\u7528\u53cd\u5c04\u673a\u5236\u83b7\u53d6Human\u7c7b\u6240\u6709\u7684\u4fe1\u606f<\/p>\n
package com.myway5;<\/p>\n
import java.lang.reflect.Constructor;
\nimport java.lang.reflect.Field;
\nimport java.lang.reflect.Method;<\/p>\n
public class Client {
\n public static void main(String[] args) {
\n \/\/ \u83b7\u53d6\u7c7b\u540d\u7b49\u4fe1\u606f
\n Class class1 = Human.class;
\n System.out.println(class1.getName());
\n System.out.println(class1.getSimpleName());<\/p>\n
System.out.println(\"***********\u6784\u9020\u65b9\u6cd5**********\");\n\n Constructor[] cs = class1.getDeclaredConstructors();\n for (Constructor constructor : cs) {\n System.out.print(constructor.getName() + \"(\");\n Class[] paramsType = constructor.getParameterTypes();\n for (Class class2 : paramsType) {\n System.out.print(class2.getName() + \",\");\n }\n System.out.println(\")\");\n }\n\n System.out.println(\"**********\u516c\u5171\u6210\u5458\u53d8\u91cf************\");\n Field[] fields = class1.getFields();\n for (Field field : fields) {\n System.out.println(field.getType().getName() + \":\" + field.getName());\n }\n\n System.out.println(\"**********\u516c\u5171\u65b9\u6cd5**************\");\n Method[] methods = class1.getMethods();\n for (Method method : methods) {\n System.out.print(method.getName() + \"(\");\n Class[] params = method.getParameterTypes();\n for (Class class3 : params) {\n System.out.print(class3.getName() + \",\");\n }\n System.out.println(method.getReturnType().getName() + \")\");\n }\n\n}\n<\/code><\/pre>\n}
\n\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a
\ncom.myway5.Human
\nHuman
\n***********\u6784\u9020\u65b9\u6cd5**********
\ncom.myway5.Human(java.lang.String,int,)
\ncom.myway5.Human(java.lang.String,)
\ncom.myway5.Human()
\n**********\u516c\u5171\u6210\u5458\u53d8\u91cf************
\njava.lang.String:word
\n**********\u516c\u5171\u65b9\u6cd5**************
\ngetName(java.lang.String)
\nsetName(java.lang.String,void)
\ngetAge(int)
\nsetAge(int,void)
\nwait(long,int,void)
\nwait(long,void)
\nwait(void)
\nequals(java.lang.Object,boolean)
\ntoString(java.lang.String)
\nhashCode(int)
\ngetClass(java.lang.Class)
\nnotify(void)
\nnotifyAll(void)
\n\u53ef\u4ee5\u770b\u5230\uff0c\u6240\u6709\u516c\u5171\u7684\u6210\u5458\u53d8\u91cf\uff0c\u65b9\u6cd5\u90fd\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e2a\u65b9\u5f0f\u83b7\u53d6\u5230\uff0c\u90a3\u4e48\u600e\u4e48\u8c03\u7528\u5176\u4e2d\u7684\u65b9\u6cd5\u5462
\npublic static void useMethod() throws IllegalAccessException, IllegalArgumentException, InvocationTargetException,
\n InstantiationException, NoSuchMethodException, SecurityException {
\n Class class1 = Human.class;
\n Human man = (Human) class1.newInstance();\/\/\u901a\u8fc7newInstance\u521b\u5efa\u5b9e\u4f8b
\n Method method = class1.getMethod(“speak”, String.class);
\n Object object = method.invoke(man, new Object[] { “hello reflect” });
\n }<\/p>\n
android\u5f00\u53d1\u4e2d\u7684\u4f7f\u7528\u540e\u7eed\u66f4\u65b0<\/p>\n
\u7ee7\u4e0a\u6587\u66f4\u65b0\uff1a<\/p>\n
android\u5f00\u53d1\u4e2d\u5e38\u5e38\u4f1a\u4f7f\u7528java\u7684\u53cd\u5c04\u673a\u5236\u6765\u66f4\u6539\u4e00\u4e9b\u7cfb\u7edf\u5e95\u5c42\u65e0\u6cd5\u66f4\u6539\u7684\u4ee3\u7801\u903b\u8f91\u3002\u6bd4\u5982\u8bf4\u5728AlertDialog\u7684\u4f7f\u7528\u4e2d\uff0c\u901a\u8fc7\u81ea\u5e26\u7684setPositiveButton\u6216\u8005setNegativeButton\u65f6\uff0c\u4e00\u65e6\u70b9\u51fb\u6309\u94ae\u90fd\u4f1a\u9000\u51fadialog\uff0c\u6709\u65f6\u5019\u6211\u4eec\u4e0d\u5e0c\u671b\u4ed6\u9000\u51fa\uff0c\u6bd4\u5982\u7528\u6237\u767b\u5f55\u65f6\u767b\u5f55\u5931\u8d25\u518d\u6b21\u767b\u5f55\u3002\u90a3\u4e48\u4e00\u79cd\u89e3\u51b3\u529e\u6cd5 \u5c31\u662f\u901a\u8fc7java\u7684\u53cd\u5c04\u673a\u5236\u3002<\/p>\n
package com.myway5.java_reflect;<\/p>\n
import android.app.AlertDialog;
\nimport android.content.DialogInterface;
\nimport android.os.Handler;
\nimport android.os.Message;
\nimport android.support.v7.app.AppCompatActivity;
\nimport android.os.Bundle;<\/p>\n
import java.lang.ref.WeakReference;
\nimport java.lang.reflect.Field;<\/p>\n
public class MainActivity extends AppCompatActivity{<\/p>\n
@Override\nprotected void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.activity_main);\n AlertDialog.Builder builder=new AlertDialog.Builder(this);\n\n builder.setMessage(\"Hello Dialog\")\n .setTitle(\"\u5bf9\u8bdd\u6846\")\n .setView(getLayoutInflater().inflate(R.layout.dialog_signin,null));\n builder.setPositiveButton(\"\u786e\u5b9a\", new DialogInterface.OnClickListener() {\n @Override\n public void onClick(DialogInterface dialog, int which) {\n\n }\n });\n builder.setNegativeButton(\"\u53d6\u6d88\", new DialogInterface.OnClickListener() {\n @Override\n public void onClick(DialogInterface dialog, int which) {\n\n }\n });\n AlertDialog dialog=builder.create();\n try {\n Field field = dialog.getClass().getDeclaredField(\"mAlert\");\n field.setAccessible(true);\n Object obj=field.get(dialog);\n field=obj.getClass().getDeclaredField(\"mHandler\");\n field.setAccessible(true);\n field.set(obj,new ButtonHandler(dialog));\n }catch (Exception e){\n e.printStackTrace();\n }\n dialog.show();\n}\nprivate static final class ButtonHandler extends Handler {\n \/\/ Button clicks have Message.what as the BUTTON{1,2,3} constant\n private static final int MSG_DISMISS_DIALOG = 1;\n\n private WeakReference<DialogInterface> mDialog;\n\n public ButtonHandler(DialogInterface dialog) {\n mDialog = new WeakReference<DialogInterface>(dialog);\n }\n\n @Override\n public void handleMessage(Message msg) {\n switch (msg.what) {\n\n case DialogInterface.BUTTON_POSITIVE:\n case DialogInterface.BUTTON_NEGATIVE:\n case DialogInterface.BUTTON_NEUTRAL:\n ((DialogInterface.OnClickListener) msg.obj).onClick(mDialog.get(), msg.what);\n break;\n\n case MSG_DISMISS_DIALOG:\n \/\/\u8fd9\u91cc\u662f\u70b9\u51fb\u540e\u7684\u903b\u8f91\uff0c\u56e0\u4e3a\u6ce8\u91ca\u6389\u4e86dismiss(),dialog\u4e0d\u4f1a\u9000\u51fa\u4e86\n \/\/((DialogInterface) msg.obj).dismiss();\n }\n }\n}\n<\/code><\/pre>\n}
\n\u5176\u4e2d
\ntry {
\n Field field = dialog.getClass().getDeclaredField(“mAlert”);
\n field.setAccessible(true);
\n Object obj=field.get(dialog);
\n field=obj.getClass().getDeclaredField(“mHandler”);
\n field.setAccessible(true);
\n field.set(obj,new ButtonHandler(dialog));
\n }catch (Exception e){
\n e.printStackTrace();
\n }
\n\u8fd9\u4e2a\u90e8\u5206\u5c31\u662f\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6AlertDialog\u7684\u79c1\u6709\u53d8\u91cfmAlert,\u7136\u540e\u83b7\u53d6mAlert\u7684\u6210\u5458\u53d8\u91cfmHandler\uff0c\u5c06\u8fd9\u4e2aHandler\u8bbe\u7f6e\u6210\u6211\u4eec\u81ea\u5df1\u7684ButtonHandler\uff0c\u8fd9\u6837\u5c31\u89e3\u51b3\u4e86\u70b9\u51fb\u540e\u9000\u51fa\u7684\u95ee\u9898<\/p>\n
\u4ee3\u7801\u5730\u5740\uff1ahttps:\/\/github.com\/joyme123\/java_reflect<\/p>\n
\u53c2\u8003\u6587\u7ae0:http:\/\/www.oschina.net\/question\/163910_27112<\/p>\n","protected":false},"excerpt":{"rendered":"