java - 为多个按钮添加多个点击监听器

Question

如何才能让用户拥有多个带有点击监听器的按钮。我用 2 个按钮尝试了它，但它说我已经定义了点击监听器，因此我无法再创建一个点击监听器。到目前为止我的代码是:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.View;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    private View btnRender;
    private LinearLayout container;
    private View btnRendered;


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

        btnRender = (View)findViewById(R.id.btn_render);
        container = (LinearLayout)findViewById(R.id.fragment_layout);
        btnRendered = (View) findViewById(R.id.btn_rendered);

        //set event handling for button
        btnRender.setOnClickListener(onClickListener());
    }

    private View.OnClickListener onClickListener() {


        return new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //replace fragment when clicked
                FragmentManager fm = getSupportFragmentManager();
                FragmentTransaction ft = fm.beginTransaction();
                ft.replace(R.id.fragment_layout, new PDFRenderFragment());
                ft.commit();

                //gone button after all
                btnRender.setVisibility(View.GONE);
                container.setVisibility(View.VISIBLE);
            }
        };


       }
}

btn_rendered 是我想为其设置点击监听器的另一个按钮，但软件不允许我这样做。我真的需要设置一个 switch-case 方法才能工作吗？

我刚刚尝试了这两种代码，但似乎都没有达到预期的效果。现在每当我点击其中一个按钮时，第二个 pdf 总是显示! (我使用按钮的目的)

Answer 1

你可以像下面这样处理。

btnRender.setOnClickListener(onClickListener()); 
btnRendered.setOnClickListener(onClickListener());

 private View.OnClickListener onClickListener() {


        return new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                switch(v.getId()){
                case R.id.btn_render:
                //replace fragment when clicked
                FragmentManager fm = getSupportFragmentManager();
                FragmentTransaction ft = fm.beginTransaction();
                ft.replace(R.id.fragment_layout, new PDFRenderFragment());
                ft.commit();

                //gone button after all
                btnRender.setVisibility(View.GONE);
                container.setVisibility(View.VISIBLE);
                break; 
                case R.id.btn_rendered:
                // your logic here 

                break; 
            }
          }
        };
    }