【Android】Android的接口Interface的应用

定义一个interface接口：

/**
 * Created by d on 2016/11/30.
 */

public interface ToastListener {
    void showToast();
}

新建类来 调用接口：

/**
 * Created by d on 2016/11/30.
 */

public class ToastListenerUser {
    private ToastListener mToastListener;

    public void setToastListener(ToastListener mToastListener) {
        this.mToastListener = mToastListener;
    }

    public void useToastListener(){
        mToastListener.showToast();
    }
}

在使用时实现接口：showToast()

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private ToastListenerUser toastListenerUser;
    private int i = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        toastListenerUser = new ToastListenerUser();
        toastListenerUser.setToastListener(new ToastListener() {
            @Override
            public void showToast() {
                Toast.makeText(MainActivity.this, "回调成功：" + i++, Toast.LENGTH_SHORT).show();
            }
        });

        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toastListenerUser.useToastListener();
            }
        });
    }

}