Question

更新后，我尝试其他选项，我在YouTube上观看了具有3种方式执行此操作的视频，直到我添加逻辑为止：

使用以下代码：

public void onClick(final View imageView) {
    ImageView mypic1 = (ImageView) findViewById(R.id.select1);
    ImageView mypic2 = (ImageView) findViewById(R.id.select2);
    ImageView mypic3 = (ImageView) findViewById(R.id.select3);
    ImageView mypic4 = (ImageView) findViewById(R.id.select4);
    ImageView mypic5 = (ImageView) findViewById(R.id.select5);
    ImageView mypic6 = (ImageView) findViewById(R.id.select6);
    View.OnClickListener listener= new OnClickListener() {
        public void onClick(View v) {
            if(imageView instanceof ImageView ){
                imageView.setTag(1);
                if(imageView.getTag().equals(1)){
                    ((ImageView) imageView).setImageResource(R.drawable.old);
                    imageView.setTag(2);
                }else{
                    ((ImageView) imageView).setImageResource(R.drawable.new);
                    imageView.setTag(1);
                }
            }

        }};

    mypic1.setOnClickListener(listener);
    mypic2.setOnClickListener(listener);
    mypic3.setOnClickListener(listener);
    mypic4.setOnClickListener(listener);
    mypic5.setOnClickListener(listener);
    mypic6.setOnClickListener(listener);

}

全部编译但不起作用，如果我仅添加烤面包，则可以工作（仅带有烤面包文本的消息）

Answer 1

像这样修改点击

 public void onClick (View v){
            switch (v.getId()) {
                case R.id.mypic1:
                    //do you action against mypic1:
                    break;
                case R.id.mypic2:
                    //do you action against mypic2:
                    break;
                case R.id.mypic3:
                    //do you action against mypic3:
                    break;
                case R.id.mypic4:
                    //do you action against mypic4:
                    break;
                case R.id.mypic5:
                    //do you action against mypic5:
                    break;
                case R.id.mypic6:
                    //do you action against mypic6:
                    break;
            }
        });

Answer 2

在“片段的活动”的onStart()中，其中我已添加ImageView，并添加了以下代码。

 override fun onStart() {
    //get all the image view like this 
    ImageView mypic1 = (ImageView) findViewById(R.id.your_imageView_id1)
    ImageView mypic2 = (ImageView) findViewById(R.id.your_imageView_id2)
    ImageView mypic3 = (ImageView) findViewById(R.id.your_imageView_id3)
    ImageView mypic4 = (ImageView) findViewById(R.id.your_imageView_id4)

    .
    .
    .
    .


    //Set onCLickListener like this 
    View.OnClickListener listener= new OnClickListener() {
        public void onClick(View imageView) {
            if(imageView instanceof ImageView ){
            //add all business logic related to your tag and replacing the image of the view
              if(imageView.getTag().equals(1)){
                imageView.setImageResource(R.drawable.picprevius);
                imageView.setTag(2);
              }else{
                imageView.setImageResource(R.drawable.newpic);
                imageView.setTag(1);
              }
           }
        }      
     }
     //add listener to all the image View like this 
     mypic1.setOnClickListener(listener)
     mypic2.setOnClickListener(listener)
     mypic3.setOnClickListener(listener)
     mypic4.setOnClickListener(listener)
     .
     .
     .
     .

  }

Answer 3

您首先将这一行添加为课程

公共类测试实现了View.OnClickListener { ImageView mypic; ...}

您必须将var类型设置为强制转换

mypic =（ImageView）findViewById（R.id.mypic1）;

mypic.setOnClickListener（this）;

public void onClick (View v){
    switch (v.getId()) {
        case R.id.mypic1:
            if(mypic.getTag().toString().equals(1)){
                mypic.setTag(2);
            if (Build.VERSION.SDK_INT >= 21)
                mypic.setImageDrawable(ContextCompat.getDrawable(getActivity(), R.drawable.newpic));
            else
                mypic.setImageDrawable(ResourcesCompat.getDrawable(getResources(), R.drawable.newpic,null));
            }else{
            if (Build.VERSION.SDK_INT >= 21)
                mypic.setImageDrawable(ContextCompat.getDrawable(getActivity(), R.drawable.oldpic));
            else
                mypic.setImageDrawable(ResourcesCompat.getDrawable(getResources(), R.drawable.oldpic,null));
                mypic.setTag(1);
            }                
      break;
        case R.id.pic2:
            //do you action against mypic2:
            break;
        case R.id.pic3:
            //do you action against mypic3:
            break;
        case R.id.pic4:
            //do you action against mypic4:
            break;
        case R.id.pic5:
            //do you action against mypic5:
            break;
        case R.id.pic6:
            //do you action against mypic6:
            break;
    }
}

如何知道单击哪个imageview并更改图像

3 个答案: