自动垂直滚动（autoText）

源码地址 http://download.csdn.net/detail/daweibalang717/9337789

另一种效果：http://blog.csdn.net/daweibalang717/article/details/51180792

自定义控件：

package cn.silent.view;import java.util.ArrayList;import android.content.Context;import android.os.Handler;import android.util.AttributeSet;import android.view.Gravity;import android.view.animation.Animation;import android.view.animation.Animation.AnimationListener;import android.view.animation.TranslateAnimation;import android.widget.FrameLayout;import android.widget.TextView;/** * @author silentyang * */public class AutoTextLine extends FrameLayout {private ArrayList<TextView> listView;private Context mContext;private TextView curTextView;private TextView nextTextView;private final int MSG_START = 0;private final int MSG_NEXT = 1;//多长时间一切换private int delay = 5000;//切换速度private int duartion = 500;private Handler mHandler = new Handler() {public void handleMessage(android.os.Message msg) {switch (msg.what) {case MSG_START:start();break;case MSG_NEXT:nextView();break;}};};public AutoTextLine(Context context) {super(context);// TODO Auto-generated constructor stubinit(context);}public AutoTextLine(Context context, AttributeSet attrs) {super(context, attrs);// TODO Auto-generated constructor stubinit(context);}public void init(Context context) {listView = new ArrayList<>();mContext = context;}public void SetData(ArrayList<String> list) {for (int i = 0; i < list.size(); i++) {TextView txt = getView(list.get(i));if (i == list.size() - 1) {//最后一个VIEWtxt.setTag(0);} else {txt.setTag(i + 1);}listView.add(txt);}if (listView.size() > 1) {//获取第一个view 并立即开始curTextView = listView.get(0);nextTextView = listView.get(1);addView(curTextView);mHandler.sendEmptyMessage(MSG_START);} else if (listView.size() == 1) {//只有一个TextViewcurTextView = listView.get(0);addView(curTextView);}}public TextView getView(String string) {TextView txt = new TextView(mContext);txt.setText(string);LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);txt.setLayoutParams(lp);txt.setGravity(Gravity.CENTER);return txt;}public void start() {//addView(curTextView);addView(nextTextView);// 从父窗口的（0,0）的位置移动父窗口X轴0%Y轴-120%的距离TranslateAnimation out = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT, -1.2f);//TranslateAnimation anim = new TranslateAnimation(0, 0, 0, 100);out.setDuration(duartion);/*anim.setRepeatCount(2);anim.setRepeatMode(Animation.REVERSE);*/out.setAnimationListener(new AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {// TODO Auto-generated method stub}@Overridepublic void onAnimationRepeat(Animation animation) {// TODO Auto-generated method stub}@Overridepublic void onAnimationEnd(Animation animation) {// TODO Auto-generated method stub//TranslateAnimation anim = new TranslateAnimation(0, 0, 0, 0);//curTextView.setAnimation(anim);removeView(curTextView);mHandler.sendEmptyMessageDelayed(MSG_NEXT, delay);}});TranslateAnimation in = new TranslateAnimation(Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT, 0, Animation.RELATIVE_TO_PARENT, 1.2f, Animation.RELATIVE_TO_PARENT, 0);in.setDuration(duartion);curTextView.startAnimation(out);nextTextView.startAnimation(in);}public void nextView() {curTextView = nextTextView;int nextIndex = (int) curTextView.getTag();nextTextView = listView.get(nextIndex);start();}public void stop() {}public int getDelay() {return delay;}public void setDelay(int delay) {this.delay = delay;}public int getDuartion() {return duartion;}public void setDuartion(int duartion) {this.duartion = duartion;}}

调用方式：

package com.example.autoscroll;import java.util.ArrayList;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.Menu;import android.view.MenuItem;import cn.silent.view.AutoTextLine;/** * @author silent yang *  * */public class MainActivity extends ActionBarActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);AutoTextLine auto = (AutoTextLine) findViewById(R.id.auto_txt);ArrayList<String> data = new ArrayList<String>();for (int i = 0; i < 2; i++) {data.add("标题\n  内容：今天雾霾" + i);}auto.SetData(data);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}}

activity_main.xml 布局：

 

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >       <cn.silent.view.AutoTextLine        android:id="@+id/auto_txt"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_horizontal" >    </cn.silent.view.AutoTextLine></LinearLayout>

不会做效果图，大概意思到了就行了。 运行滚动其实很平缓：