在Android的滚动视图中获取ImageView的ID

问题描述：

如何在scrollView中找到此元素，如何获取已被单击的元素的ID？在我的情况下，我有4张照片（ImageViews），如果我点击其中的一张，我想要得到它的ID（已经用ImageView.setId（int）设置）。这里是我的代码：在Android的滚动视图中获取ImageView的ID

package scroll.s; 

import android.app.Activity; 
import android.os.Bundle; 
import android.widget.HorizontalScrollView; 
import android.widget.ImageView; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 

public class ScrollsActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     int layoutId = 0; 

     RelativeLayout main = new RelativeLayout(this); 
     RelativeLayout.LayoutParams mainParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
     main.setId(layoutId); 
     layoutId++; 

     TextView past = new TextView (this); 
     RelativeLayout.LayoutParams pastParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
     past.setId(layoutId); 
     layoutId++; 
     past.setText("Past: "); 
     pastParams.addRule(RelativeLayout.ALIGN_PARENT_TOP); 
     main.addView(past, pastParams); 

     final HorizontalScrollView hsv = new HorizontalScrollView(this); 
     hsv.setId(layoutId); 
     layoutId++; 
     hsv.setHorizontalScrollBarEnabled(false); 
     mainParams.addRule(RelativeLayout.BELOW, 1); 
     main.addView(hsv, mainParams);   

     final RelativeLayout relative1 = new RelativeLayout(this); 
     relative1.setId(layoutId); 
     layoutId++; 
     hsv.addView(relative1); 

     for (int i=0; i<4; i++) { 
      ImageView current = new ImageView(this); 
      current.setBackgroundDrawable(getResources().getDrawable(R.drawable.example)); 
      current.setId(layoutId); 

      RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
      params.addRule(RelativeLayout.RIGHT_OF, (layoutId-1)); 
      params.leftMargin=10; 
      relative1.addView(current, params); 
      layoutId++; 
     } 

     for (int i=0; i<4; i++) { 
      TextView currentText = new TextView(this); 
      currentText.setText("random text"); 
      currentText.setId(layoutId); 

      RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
      params.addRule(RelativeLayout.BELOW, (layoutId-4)); 
      params.addRule(RelativeLayout.ALIGN_LEFT, (layoutId-4)); 
      params.topMargin=5; 
      relative1.addView(currentText, params); 
      layoutId++; 
     } 


     this.setContentView(main); 
    } 
}

这是我这段代码实现： scrollsview

我得到ERROR/AndroidRuntime（2258）：android.content.res.Resources $ NotFoundException：字符串资源ID ＃为0x4 当我把下面的代码：

current.setOnClickListener(new OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Toast.makeText(getBaseContext(), current.getId(), Toast.LENGTH_SHORT).show(); 
     } 
    });

答

将其更改为：

current.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Toast.makeText(getBaseContext(), String.valueOf(v.getId()), Toast.LENGTH_SHORT).show(); 
      } 
     });

如果你传递一个int makeText的第二个参数，它假定它是strings.xml文档中列出的String的id。 – FunkTheMonk

感谢队友，工作！ –

答

方法makeText()的第二个参数是一个字符串，不是诠释（current.getId()），所以你应该把它转换为String这样的：

current.setOnClickListener(new OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Toast.makeText(getBaseContext(),""+v.getId(), Toast.LENGTH_SHORT).show(); 
      } 
     });

在Android的滚动视图中获取ImageView的ID

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