Android Custom Banner Carousel Effect
- 2021-09-05 00:46:16
- OfStack
In this paper, we share the specific codes of Android custom Banner carousel effect display for your reference. The specific contents are as follows
Custom View layout
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v4.view.ViewPager
android:id="@+id/banner_view_pager"
android:layout_width="match_parent"
android:layout_height="200dp">
</android.support.v4.view.ViewPager>
<LinearLayout
android:id="@+id/linear_bannner"
android:layout_centerHorizontal="true"
android:layout_alignBottom="@+id/banner_view_pager"
android:layout_marginBottom="10dp"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</LinearLayout>
</RelativeLayout>
Customize View body content
public class CustomBanner extends FrameLayout {
@BindView(R.id.banner_view_pager)
ViewPager bannerViewPager;
@BindView(R.id.linear_bannner)
LinearLayout linearBannner;
private List<String> list;
private int time = 2;
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0) {
int currentItem = bannerViewPager.getCurrentItem();
bannerViewPager.setCurrentItem(currentItem + 1);
// Send again
sendEmptyMessageDelayed(0, time * 1000);
}
}
};
private List<ImageView> listDoc;
private OnClickLisner onClickLisner;
public CustomBanner(@NonNull Context context) {
super(context);
init();
}
public CustomBanner(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
public CustomBanner(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
/**
* Initialization
*/
private void init() {
View view = View.inflate(getContext(), R.layout.bannner_layout, this);
ButterKnife.bind(this, view);
}
/**
* Provide settings externally image Method of path
*/
public void setImageUrls(List<String> list) {
this.list = list;
if (list == null) {
return;
}
// Setting adapter
LunBoAdapter lunBoAdapter = new LunBoAdapter(getContext(), list);
bannerViewPager.setAdapter(lunBoAdapter);
initDoc();
// Show somewhere in the middle
bannerViewPager.setCurrentItem(list.size() * 10000);
// Use handler Automatic carousel
handler.sendEmptyMessageDelayed(0, time * 1000);
// Listening Events for State Change
bannerViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
// When selecting a certain 1 Page time , Toggle the background of small dots
for (int i = 0; i < listDoc.size(); i++) {
if (position % listDoc.size() == i) {
listDoc.get(i).setBackgroundResource(R.drawable.shape_01);
} else {
listDoc.get(i).setBackgroundResource(R.drawable.shape_02);
}
}
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
/**
* Initialize dot
*/
private void initDoc() {
// Create 1 Set of , Record these little dots
listDoc = new ArrayList<>();
// Empty the layout
linearBannner.removeAllViews();
for (int i = 0; i < list.size(); i++) {
ImageView docImage = new ImageView(getContext());
if (i == 0) {
docImage.setBackgroundResource(R.drawable.shape_01);
} else {
docImage.setBackgroundResource(R.drawable.shape_02);
}
// Add to Collection
listDoc.add(docImage);
// Add to Linear Layout
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.setMargins(5, 0, 5, 0);
linearBannner.addView(docImage, params);
}
}
/**
* Provide carousel time to the outside world
*/
public void setTimeSecond(int time) {
this.time = time;
}
/**
* Click event
*
* @param onClickLisner
*/
public void setClickListner(OnClickLisner onClickLisner) {
this.onClickLisner = onClickLisner;
}
private class LunBoAdapter extends PagerAdapter {
private List<String> list;
private Context context;
public LunBoAdapter(Context context, List<String> list) {
this.context = context;
this.list = list;
}
@Override
public int getCount() {
return Integer.MAX_VALUE;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
@Override
public Object instantiateItem(ViewGroup container, final int position) {
// Create imageView
ImageView imageView = new ImageView(context);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
// Load this picture
Glide.with(context).load(list.get(position % list.size())).into(imageView);
// Click event
imageView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
// Trigger
onClickLisner.onItemClick(position % list.size());
}
});
// Touch event
imageView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
switch (motionEvent.getAction()) {
case MotionEvent.ACTION_DOWN:
// Cancel handler Messages and callbacks on the body
handler.removeCallbacksAndMessages(null);
break;
case MotionEvent.ACTION_MOVE:
handler.removeCallbacksAndMessages(null);
break;
case MotionEvent.ACTION_CANCEL:
handler.sendEmptyMessageDelayed(0, time * 1000);
break;
case MotionEvent.ACTION_UP:
handler.sendEmptyMessageDelayed(0, time * 1000);
break;
}
return false;
}
});
// Add to Container
container.addView(imageView);
// Return
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
}
public interface OnClickLisner {
void onItemClick(int position);
}
}
Custom dots
public class CountView extends View implements View.OnClickListener {
private int count = 0;
public CountView(Context context) {
super(context);
init();
}
public CountView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
public CountView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
// Method of initialization
private void init() {
this.setOnClickListener(this);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setColor(Color.RED);
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.FILL);
// Circle
canvas.drawCircle(300,300,200,paint);
paint.setColor(Color.BLACK);
paint.setTextSize(100);
String text = String.valueOf(count);
// Get the width and height of the text
Rect rect = new Rect();
paint.getTextBounds(text,0,text.length(),rect);
canvas.drawText(text,300-rect.width()/2,300+rect.height()/2,paint);
}
@Override
public void onClick(View view) {
count ++;
// Redraw
postInvalidate();
}
}
Small dot shape
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#00ff00"/>
<corners android:radius="10dp"/>
<size android:height="10dp" android:width="10dp"/>
</shape>
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#ff0000"/>
<corners android:radius="10dp"/>
<size android:height="10dp" android:width="10dp"/>
</shape>
Running in Main
public class MainActivity extends AppCompatActivity {
private CustomBanner customBanner;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
customBanner = findViewById(R.id.custom_banner);
getDataFromNet();
}
private void getDataFromNet() {
OkHttpUtil.doGet("https://www.zhaoapi.cn/ad/getAd", new Callback() {
private List<String> list;
@Override
public void onFailure(Call call, IOException e) {
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()){
String json = response.body().string();
final HomeBean detalBean = new Gson().fromJson(json,HomeBean.class);
list = new ArrayList<>();
List<HomeBean.DataBean> data = detalBean.getData();
for (int i = 0; i < data.size(); i++) {
String icon = data.get(i).getIcon();
list.add(icon);
}
runOnUiThread(new Runnable() {
@Override
public void run() {
// Setting time
customBanner.setTimeSecond(5);
// Set up display carousel
customBanner.setImageUrls(list);
//banner Events on the click jump details page of
banner.setOnBannerListener(new OnBannerListener() {
@Override
public void OnBannerClick(int position) {
List<ShouBean.DataBean> datab = shouBean.getData();
if (datab.get(position).getType() == 0) {
Intent intent = new Intent(getActivity(), WebViewActivity.class);
intent.putExtra("databurl", datab.get(position).getUrl());
startActivity(intent);
} else {
Toast.makeText(getContext(), " You are about to jump to the Product Details page ", Toast.LENGTH_SHORT).show();
}
}
});
}
});
}
}
});
}
}
WebView page
public class WebViewActivity extends AppCompatActivity {
private WebView web_view;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_web_view);
web_view = findViewById(R.id.web_view);
String databurl = getIntent().getStringExtra("databurl");
web_view.loadUrl(databurl);
//webview1 Series settings
web_view.setWebViewClient(new WebViewClient());// Open in the current application , Instead of going to the browser
WebSettings settings = web_view.getSettings();
settings.setJavaScriptEnabled(true);
settings.setJavaScriptCanOpenWindowsAutomatically(true);
}
}