android - 在获取 imageView id 的 ViewFlipper 中动态创建 imageView

Question

我在我的 ViewFlipper 中动态创建了 imageView，它运行流畅。但是，当我想单击图像时，我需要放大图像并对其进行处理。我如何获得ID。我需要能够区分我点击了哪个图像。

提前致谢。

    public class Home_Fragment extends Fragment{

.....

   private ViewFlipper vf;

    int gallery_grid_Images[]={R.drawable.a,R.drawable.b,R.drawable.c,
            R.drawable.d};

  private void setFlipperImage(int res) {
        //Log.i("Set Filpper Called", res+"");
        ImageView image = new ImageView(getActivity());



        LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, 
                LayoutParams.MATCH_PARENT);
        image.setLayoutParams(lp);

        image.setAdjustViewBounds (true);
        image.setScaleType(ScaleType.CENTER_INSIDE);
        image.setClickable(true);

        image.setBackgroundResource(res);

        image.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                int id=(Integer) v.getTag();     //---> This will crash if i click the image
                //Toast.makeText(getActivity(), id+"", Toast.LENGTH_LONG).show();

            }
        });


        vf.setTag(res);

        vf.addView(image);
    }

Answer 1

下面的代码我已经使用 viewflipper 来滑动图像。你可以在 forloop 中添加图像的 onclick 事件。

SlideShowActivity.java

package com.example.viewpagerexample;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.ViewFlipper;

public class SlideShowActivity extends Activity {

private ViewFlipper myViewFlipper;
private float initialXPoint;
int[] image = { R.drawable.one_full, R.drawable.two_full,
    R.drawable.three_full, R.drawable.four_full, R.drawable.five_full,
    R.drawable.six_full, R.drawable.seven_full, R.drawable.eight_full,
    R.drawable.nine_full, R.drawable.ten_full };

@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.slide_show);
myViewFlipper = (ViewFlipper) findViewById(R.id.myflipper);

for (int i = 0; i < image.length; i++) {
    ImageView imageView = new ImageView(SlideShowActivity.this);
    imageView.setImageResource(image[i]);
    myViewFlipper.addView(imageView);
    imageView.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
       // your code
   }});
} 

@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
    initialXPoint = event.getX();
    break;
case MotionEvent.ACTION_UP:
    float finalx = event.getX();
    if (initialXPoint > finalx) {
        if (myViewFlipper.getDisplayedChild() == image.length)
            break;
        myViewFlipper.showNext();
    } else {
        if (myViewFlipper.getDisplayedChild() == 0)
            break;
        myViewFlipper.showPrevious();
    }
    break;
}
return false;
}
}

此处图像仅在用户滑动时发生变化。

如果你想按一定的时间间隔自动滑动，添加下面的代码。

myViewFlipper.setAutoStart(true);
myViewFlipper.setFlipInterval(3000);
myViewFlipper.startFlipping();