Android接口的基本使用

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Android 的接口定义和使用:

1 定义接口:

(1)定义

public class MyClass {    CallBackListener mCallBackListener;    public void UseCallBack(){        mCallBackListener.function();    }    public void setCallBackListener(CallBackListener mCallBackListener) {        this.mCallBackListener = mCallBackListener;    }        public interface CallBackListener{        void function();    }}

调用

public class MainActivity extends AppCompatActivity {    MyClass myClass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myClass = new MyClass();        myClass.setCallBackListener(new MyClass.CallBackListener() {            @Override            public void function() {                Log.e("---","Myclass");            }        });        myClass.UseCallBack();    }}

(2)定义

public interface ICallBack {    void func1 ();    void func2 ();}

实现

public class MyClass implements ICallBack{    CallBackListener mCallBackListener;    public void UseCallBack(){        mCallBackListener.function();    }    public void setCallBackListener(CallBackListener mCallBackListener) {        this.mCallBackListener = mCallBackListener;    }    @Override    public void func1() {        Log.e("---", "func1: ");    }    @Override    public void func2() {        Log.e("---", "func2: ");    }    public interface CallBackListener{        void function();    }}

调用

public class MainActivity extends AppCompatActivity {    MyClass myClass;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myClass = new MyClass();        myClass.setCallBackListener(new MyClass.CallBackListener() {            @Override            public void function() {                Log.e("---","Myclass");            }        });        myClass.func1();        myClass.UseCallBack();    }}

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