反射在Android中的應用

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1> 建立測試執行個體

public class Test {    private String string;    private int anInt;    public Test(){        System.out.println("This is Test.Test()");    }    public Test(String s, int anInt){        this.string = s;        this.anInt = anInt;    }    private void printOut(){        System.out.println("Test.printOut-azheng" + " String:" + string + " anint:" + anInt );    }}

2> 通過反射，調用測試類別的有參構造方法以及定義的輸出方法

public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Class<Test> c = Test.class;        Test test = null;        Constructor constructor = null;        try {            //擷取有參構造方法            constructor = c.getDeclaredConstructor(String.class,int.class);            test = (Test) constructor.newInstance("yes",1000);            //擷取方法            Method method = c.getDeclaredMethod("printOut");            method.setAccessible(true);            method.invoke(test);        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (InstantiationException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        }    }}

參考：

http://baike.xsoftlab.net/view/209.html#3_2

反射在Android中的應用