Question

我有一个按钮和两个图像，我希望按钮的默认图像为 btn1.jpg ，单击该按钮时，图像应立即更改为 btn2.jpg ， 3秒后，它应该再次恢复为 btn1.jpg 。请告诉我如何实现这一目标？

    package com.example.btn;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    private View ButtonName;

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

    public void yolo(View v) {
        switch (v.getId()) {
            case R.id.buttonName:
                ButtonName.setBackgroundResource(R.drawable.btn2);
                //Disable click on Button
               ButtonName.setEnabled(false);
               try {
                   Thread.sleep(3000);
               }
               catch (Exception e) {
                  e.printStackTrace();
               }
               ButtonName.setBackground(getResources().getDrawable(R.drawable.btn1));
               break;

            case default:
                ButtonName.setBackgroundResource(R.drawable.btn1);
        }
    }

}

Answer 1

您必须将OnClick方法中的按钮背景图像更改为 btn2.jpg 。之后，您必须启动计时器倒计时3秒，然后再将按钮图像再次更改为 btn1.jpg

private final int interval = 3000;
private Handler handler = new Handler();
private Runnable runnable

btn.setOnClickListener(new View.OnClickListener()
{
    @Override
    public void onClick(View v)
    {

        btn.setBackground(getResources().getDrawable(R.drawable.btn2))

        //Start runnable after 3 seconds
        handler.postDelayed(runnable, interval);

    }
});

runnable = new Runnable(){
    public void run() {
       btn.setBackground(getResources().getDrawable(R.drawable.btn1)) 
    }
};

Answer 2

终于弄清楚了自己！

在xml中设置按钮的背景

使用此代码：

package com.example.btn;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;

public class MainActivity extends Activity {
    Handler mHandler; // global instance
    Runnable your_runnable; // global instance

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

    public void yolo(final View view) {

        if (view == view) {
            view.setBackgroundResource(R.drawable.btn1);
            mHandler = new Handler();
            your_runnable = new Runnable() {

                @Override
                public void run() {
                    view.setBackgroundResource(R.drawable.btn2);

               }

            };

            mHandler.postDelayed(your_runnable, 3000L);// 3sec timer

        }
    }
}

Answer 3

好的，首先，你在这里犯了一个错误：

ButtonName.setBackgroundResource(getresources().getDrawable(R.drawable.btn2));

之后，在按钮上添加clickListener：

private Thread t = new Thread(new Runnable {
    @Override
    public void run() {
        ButtonName.setBackgroundResource(getresources().getDrawable(R.drawable.btn2));
       //Disable click on Button
       ButtonName.setEnabled(false);
       try {
           Thread.sleep(3000);
       }
       catch (Exception e) {
          e.printstacktrace();
       }
       ButtonName.setBackgroundResource(getresources().getDrawable(R.drawable.btn1));
    }
 });

 ButtonName.setOnClickListener (new OnClickListener (
    @Override
    public void onClick(View v) {
       t.start();
    }
 ));

我认为这就是你想要的

Answer 4

这可能对你有用!!

public class MainActivity extends Activity {

  Button button;
  private Handler handler;


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

          button=(Button)findViewById(R.id.yourbuttonid);

          button.setOnClickListener(new OnClickListener() {

           @Override
           public void onClick(View v) {

             button.setBackgroundResource(getresources().getDrawable(R.drawable.btn1));
             handler=new Handler();
             handler.postDelayed(new Runnable() {
                   @Override
                   public void run() {
                     button.setBackgroundResource(getresources().getDrawable(R.drawable.btn2));
            }
        }, 3000);


        }
    });
}

更改按钮图像onClick android

4 个答案: