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[英]Gridview onclick images display imageview as gallery view using viewpager
[英]onClick for images in ViewPager
我有一个在ViewPager.
的帮助下制作的图像滑块ViewPager.
我想在ViewPager
加载的不同图像中单击时显示不同的toast
消息,我该怎么做?
这是显示图像滑块的我的活动:
public class MainActivity extends AppCompatActivity{
public static final String MAIN = "OTHER";
private static ViewPager mPager;
private static int currentPage = 0;
private static final Integer[] XMEN=
{R.drawable.benz2, R.drawable.benz2,
R.drawable.benz2};
private ArrayList<Integer> XMENArray = new ArrayList<Integer>();
@Override
protected void onCreate(...);
init();
}
private void init() {
for(int i=0;i<XMEN.length;i++)
XMENArray.add(XMEN[i]);
mPager = (ViewPager) findViewById(R.id.pager);
mPager.setAdapter(new com.example.nepali_test.MyAdapter(MainActivity.this,XMENArray));
CircleIndicator indicator = (CircleIndicator) findViewById(R.id.indicator);
indicator.setViewPager(mPager);
final Handler handler = new Handler();
final Runnable Update = new Runnable() {
public void run() {
if (currentPage == XMEN.length) {
currentPage = 0;
}
mPager.setCurrentItem(currentPage++, true);
}
};
Timer swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
@Override
public void run() {
handler.post(Update);
}
}, 3000, 3000);
}
这是viewpager的适配器:
public class MyAdapter extends PagerAdapter {
private ArrayList<Integer> images;
private LayoutInflater inflater;
private Context context;
public MyAdapter(Context context, ArrayList<Integer> images) {
this.context = context;
this.images=images;
inflater = LayoutInflater.from(context);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return images.size();
}
@Override
public Object instantiateItem(ViewGroup view, int position) {
View myImageLayout = inflater.inflate(R.layout.slide, view, false);
ImageView myImage = (ImageView) myImageLayout
.findViewById(R.id.image);
myImage.setImageResource(images.get(position));
view.addView(myImageLayout, 0);
return myImageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
}
我试图通过添加
if (currentPage==1){
Toast.makeText(this, "page 1", Toast.LENGTH_SHORT).show();
}
在init()
但它没有用。
从我能理解你需要显示土司在每一页的图像上单击时ViewPager
在这种情况下,一个简单的方法是将添加onClickListener
到您ImageView
您的适配器的内部instantiateItem
方法。 所以你应该用这个改变/替换你的方法:
@NonNull
@Override
public Object instantiateItem(@NonNull final ViewGroup view, final int position) {
View myImageLayout = inflater.inflate(R.layout.slide, view, false);
ImageView myImage = (ImageView) myImageLayout
.findViewById(R.id.image);
myImage.setImageResource(images.get(position));
myImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context.getApplicationContext(), "page "+position, Toast.LENGTH_SHORT).show();
}
});
view.addView(myImageLayout, 0);
return myImageLayout;
}
尝试这个:
@Override
public Object instantiateItem(View collection, final int pos) { //have to make final so we can see it inside of onClick()
LayoutInflater inflater = (LayoutInflater) collection.getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View page = inflater.inflate(R.layout.YOUR_PAGE, null);
page.setOnClickListener(new OnClickListener(){
public void onClick(View v){
//this will log the page number that was click
Log.i("TAG", "This page was clicked: " + pos);
}
});
((ViewPager) collection).addView(page, 0);
return page;
}
希望这会奏效!
在适配器类中制作图片点击界面
public class MyAdapter extends PagerAdapter {
private ArrayList<Integer> images;
private LayoutInflater inflater;
private Context context;
MyClassImage myClassImage;
public interface MyClassImage{
void imageClick(String id);
}
public ViewPagerAdapter(Context context, ArrayList<Integer> images,MyClassImage myClassImage) {
this.context = context;
this.images=images;
this.myClassImage=myClassImage;
inflater = LayoutInflater.from(context);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return images.size();
}
@Override
public Object instantiateItem(ViewGroup view, int position) {
View myImageLayout = inflater.inflate(R.layout.z_slide_pager_item, view, false);
ImageView myImage = (ImageView) myImageLayout.findViewById(R.id.image);
myImage.setImageResource(images.get(position));
view.addView(myImageLayout, 0);
final int id=images.get(position);
final String imgId=String.valueOf(id);
myImage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
myClassImage.imageClick(imgId);
}
});
return myImageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
}
并在您的 MainActivity 类上实现它
public class MainActivity extends AppCompatActivity implements MyAdapter.MyClassImage {
public static final String MAIN = "OTHER";
private static ViewPager mPager;
private static int currentPage = 0;
private static final Integer[] XMEN= {R.drawable.benz2, R.drawable.benz2, R.drawable.benz2};
private ArrayList<Integer> XMENArray = new ArrayList<Integer>();
@Override
protected void onCreate(...);
init();
}
private void init() {
for(int i=0;i<XMEN.length;i++)
XMENArray.add(XMEN[i]);
mPager = (ViewPager) findViewById(R.id.pager);
mPager.setAdapter(new com.example.nepali_test.MyAdapter(MainActivity.this,XMENArray,this));
CircleIndicator indicator = (CircleIndicator) findViewById(R.id.indicator);
indicator.setViewPager(mPager);
final Handler handler = new Handler();
final Runnable Update = new Runnable() {
public void run() {
if (currentPage == XMEN.length) {
currentPage = 0;
}
mPager.setCurrentItem(currentPage++, true);
}
};
Timer swipeTimer = new Timer();
swipeTimer.schedule(new TimerTask() {
@Override
public void run() {
handler.post(Update);
}
}, 3000, 3000);
}
@Override
public void imageClick(String id) {
Toast.makeText(this, "page "+id, Toast.LENGTH_SHORT).show();
}
希望对你有帮助。
谢谢。
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