先来看看效果吧,Android仿京东快报信息滚动效果,具体内容如下
(截图效果不是很好,但是差不多出来了)
代码:
package com.test.scrolltransptoolbar; import android.content.Context; import android.graphics.Color; import android.os.Handler; import android.text.TextUtils; import android.util.AttributeSet; import android.util.TypedValue; import android.view.GestureDetector; import android.view.Gravity; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.AnimationUtils; import android.widget.TextView; import android.widget.ViewFlipper; import java.util.List; /** * Created by Administrator on 2017/8/31. */ public class JinDongKuaiBaoView extends ViewFlipper implements View.OnClickListener, View.OnTouchListener { private Context context; private List<String> mNotices; public final static int SCROLL_TYPE_VERTICAL = 0; public final static int SCROLL_TYPE_HORIZONTAL = 1; private GestureDetector mGestureDetector; public static final int FLING_MIN_DISTANCE = 80; public static final int FLING_MIN_VELOCITY = 120; private boolean isFling=false; public JinDongKuaiBaoView(Context context) { super(context); } Handler handler=new Handler(); public JinDongKuaiBaoView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } private void init(Context context) { // mGestureDetector = new GestureDetector(new simpleGestureListener()); this.context = context; // 轮播间隔时间为3s setFlipInterval(3000); // 内边距5dp setPadding(dp2px(5f), dp2px(5f), dp2px(5f), dp2px(5f)); setScrollType(SCROLL_TYPE_VERTICAL); // setOnTouchListener(this); } private int dp2px(float dpValue) { return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dpValue, context.getResources().getDisplayMetrics()); } public void setScrollType(int type) { clearAnimation(); switch (type) { case SCROLL_TYPE_VERTICAL://垂直滚动动画设置 // 设置enter和leave动画 setInAnimation(AnimationUtils.loadAnimation(context, R.anim.notify_in)); setOutAnimation(AnimationUtils.loadAnimation(context, R.anim.notify_out)); break; case SCROLL_TYPE_HORIZONTAL://水平滚动动画设置 setInAnimation(AnimationUtils.loadAnimation(context, R.anim.horizontal_notify_in)); setOutAnimation(AnimationUtils.loadAnimation(context, R.anim.horizontal_notify_out)); break; default: break; } } /** * 添加需要轮播展示的公告 * * @param notices */ public void addNotice(List<String> notices) { this.mNotices = notices; removeAllViews(); for (int i = 0; i < mNotices.size(); i++) { // 根据公告内容构建一个TextView String notice = notices.get(i); TextView textView = new TextView(context); textView.setSingleLine(); textView.setText(notice); textView.setTextSize(13f); textView.setEllipsize(TextUtils.TruncateAt.END); textView.setTextColor(Color.parseColor("#666666")); textView.setGravity(Gravity.CENTER_VERTICAL); // 将公告的位置设置为textView的tag方便点击是回调给用户 textView.setTag(i); textView.setOnClickListener(this); // 添加到ViewFlipper JinDongKuaiBaoView.this.addView(textView, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT)); } } @Override public void onClick(View v) { int position = (int) v.getTag(); String notice = (String) mNotices.get(position); if (mOnNoticeClickListener != null) { mOnNoticeClickListener.onNotieClick(position, notice); } } // private void ToRightAnimation() { // clearAnimation(); // setInAnimation(AnimationUtils.loadAnimation(context, R.anim.right_notify_in)); // setOutAnimation(AnimationUtils.loadAnimation(context, R.anim.right_notify_out)); // } // // private void ToLeftAnimation() { // clearAnimation(); // setInAnimation(AnimationUtils.loadAnimation(context, R.anim.horizontal_notify_in)); // setOutAnimation(AnimationUtils.loadAnimation(context, R.anim.horizontal_notify_out)); // } @Override public boolean onTouch(View v, MotionEvent event) { mGestureDetector.onTouchEvent(event); return true ; } /** * 通知点击监听接口 */ public interface OnNoticeClickListener { void onNotieClick(int position, String notice); } private OnNoticeClickListener mOnNoticeClickListener; /** * 设置通知点击监听器 * * @param onNoticeClickListener 通知点击监听器 */ public void setOnNoticeClickListener(OnNoticeClickListener onNoticeClickListener) { mOnNoticeClickListener = onNoticeClickListener; } // private class simpleGestureListener extends GestureDetector.SimpleOnGestureListener { // @Override // public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { // isFling=true; // if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE // && Math.abs(velocityX) > FLING_MIN_VELOCITY) { // // 当像左侧滑动的时候 // //设置View进入屏幕时候使用的动画 // //设置View退出屏幕时候使用的动画 // ToLeftAnimation(); // showNext(); // } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE // && Math.abs(velocityX) > FLING_MIN_VELOCITY) { // // 当像右侧滑动的时候 // ToRightAnimation(); // showPrevious(); // } // handler.postDelayed(new Runnable() { // @Override // public void run() { // startFlipping(); // } // },0); // // return true; // } // } }
注释掉的内容可以不用管,那是我做其他调试用的
使用方式
package com.test.scrolltransptoolbar; import android.app.Activity; import android.os.Bundle; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View; import android.widget.Toast; import java.util.ArrayList; import java.util.List; /** * Created by Administrator on 2017/8/31. */ public class ViewFlipperActivity extends Activity implements JinDongKuaiBaoView.OnNoticeClickListener { private JinDongKuaiBaoView jinDongKuaiBaoView; private GestureDetector gestureDetector; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_viewflipper); jinDongKuaiBaoView = (JinDongKuaiBaoView) findViewById(R.id.jindongkuaibaoview); List<String> notices = new ArrayList<>(); notices.add("大促销下单拆福袋,亿万新年红包随便拿"); notices.add("家电五折团,抢十亿无门槛现金红包"); notices.add("星球大战剃须刀首发送200元代金券"); jinDongKuaiBaoView.setScrollType(JinDongKuaiBaoView.SCROLL_TYPE_HORIZONTAL); jinDongKuaiBaoView.addNotice(notices); jinDongKuaiBaoView.startFlipping(); jinDongKuaiBaoView.setOnNoticeClickListener(this); } @Override public void onNotieClick(int position, String notice) { Toast.makeText(ViewFlipperActivity.this,"position"+position,Toast.LENGTH_LONG).show(); } }
//设置从左开始滚动还是,水平向上开始滚动 jinDongKuaiBaoView.setScrollType(JinDongKuaiBaoView.SCROLL_TYPE_HORIZONTAL); //开始滚动的方法 jinDongKuaiBaoView.startFlipping(); // 轮播间隔时间为3s setFlipInterval(3000);
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持呐喊教程。
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