PopupWindow返回参数至Activity两种方式：接口和Rxjava

使用Rxjava回调参数至Activity

定义一个继承PopupWindow的类

public class PopupWindows extends PopupWindow implements View.OnClickListener {

    public PopupWindows (View parent, final Context context) {
        super(context);

        View view = View.inflate(context, R.layout.ppw_groups_join, null);
    //设置PopupWindows 显示动画
    setWidth(WindowManager.LayoutParams.MATCH_PARENT);
        setHeight(WindowManager.LayoutParams.MATCH_PARENT);
    setFocusable(true);
        setOutsideTouchable(true);
        setContentView(view);
        showAtLocation(parent, Gravity.BOTTOM, 0, 0);
        update();

        view.findViewById(R.id.btn1).setOnClickListener(this);
    }



    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn1:
                Observable.just(1).subscribe(MainActivity.action1);
                break;
        }
        dismiss();
    }
}

在MainActivity定义Action1方法，需要先实例化

public class MainActivity extends Activity {
    private Button btn1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn1=(Button) findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new PopupWindows(btn1, MainActivity.this);
            }
        });
    }
    public static Action1<int> action1 = new Action1<int>() {
            @Override
            public void call(int i) {
                System.out.println(i);
            }
        };
    }

使用接口回调参数至Activity

定义继承PopupWindow类

public class JoinPopupWindows extends PopupWindow implements View.OnClickListener{

    public PopupWindows (View parent, final Context context) {
        super(context);

        View view = View.inflate(context, R.layout.ppw_groups_join, null);
    //设置PopupWindows 显示动画
    setWidth(WindowManager.LayoutParams.MATCH_PARENT);
        setHeight(WindowManager.LayoutParams.MATCH_PARENT);
    setFocusable(true);
        setOutsideTouchable(true);
        setContentView(view);
        showAtLocation(parent, Gravity.BOTTOM, 0, 0);
        update();

        view.findViewById(R.id.btn1).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn1:
                test.getTest(1);
                break;
        }
        dismiss();
    }

    private ITest test;

    public void setTest(ITest test) {
        this.test = test;
    }

    public interface ITest {

        void getTest(int i);
    }
}

在MainActivity继承ITest接口

public class MainActivity extends Activity implements ITest {
    private Button btn1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn1=(Button) findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                new PopupWindows(btn1, MainActivity.this).setTest(MainActivity.this);
            }
        });
    }

    @Override
    public void getTest(int i) {
        System.out.println(i);
    }
}