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Android自定义View实现上下滚动通知
<The rest of contents | 余下全文>
朋友项目需要个上下滚动通知的通知View，没有什么思路，求助于我。
简单说下我的思路：
自定义View继承至FrameLayout
内部包含要滚动的View，默认Visibility为invisible。
然后利用平移动画来移动View，在动画开始/结束的时候设置view的可视，在某一个view消失动画执行的时候开始启动下一个view的进入动画。
废话不多说，直接看代码。
要滚动View的XML：
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| <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/tv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="标题"
android:textSize="16sp" />
<TextView
android:id="@+id/tv_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:gravity="center"
android:text="公告内容"
android:textSize="12sp" />
</LinearLayout>
|
自定义的代码：
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| package com.gloomyer.toticedemo;
import android.content.Context;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;
import android.widget.TextView;
import java.util.List;
public class NoticeVIew extends FrameLayout {
View view1;
View view2;
private List<Bean> list;
private int index = 0;
public NoticeVIew(Context context, AttributeSet attrs) {
super(context, attrs);
view1 = View.inflate(context, R.layout.item, null);
view2 = View.inflate(context, R.layout.item, null);
view1.setVisibility(View.VISIBLE);
view2.setVisibility(View.INVISIBLE);
addView(view1);
addView(view2);
}
public void setData(List<Bean> list) {
this.list = list;
index = 0;
start1();
}
private static Handler mHandler = new Handler();
private void setData(View view) {
TextView title = (TextView) view.findViewById(R.id.tv_title);
TextView value = (TextView) view.findViewById(R.id.tv_value);
title.setText(list.get(index).title);
value.setText(list.get(index).value);
index++;
if (index == list.size())
index = 0;
}
private void start1() {
final View view = view1;
Animation anim = getAnim(true);
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
view.setVisibility(View.VISIBLE);
setData(view);
}
@Override
public void onAnimationEnd(Animation animation) {
view.clearAnimation();
final Animation anim = getAnim(false);
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
start2();
}
}, 800);
}
@Override
public void onAnimationEnd(Animation animation) {
view.clearAnimation();
view.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
view.startAnimation(anim);
}
}, 2000);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
view.startAnimation(anim);
}
private void start2() {
final View view = view2;
Animation anim = getAnim(true);
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
view.setVisibility(View.VISIBLE);
setData(view);
}
@Override
public void onAnimationEnd(Animation animation) {
view.clearAnimation();
final Animation anim = getAnim(false);
anim.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
start1();
}
}, 500);
}
@Override
public void onAnimationEnd(Animation animation) {
view.clearAnimation();
view.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
view.startAnimation(anim);
}
}, 2000);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
view.startAnimation(anim);
}
public Animation getAnim(boolean on) {
TranslateAnimation tran = new TranslateAnimation(
TranslateAnimation.RELATIVE_TO_SELF, 0,
TranslateAnimation.RELATIVE_TO_SELF, 0,
TranslateAnimation.RELATIVE_TO_SELF, on ? 1 : 0,
TranslateAnimation.RELATIVE_TO_SELF, on ? 0 : -1
);
tran.setFillAfter(true);
tran.setDuration(1500);
return tran;
}
}
|
要滚动的数据Bean：
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| package com.gloomyer.toticedemo;
public class Bean {
public String title;
public String value;
public Bean(String title, String value) {
this.title = title;
this.value = value;
}
}
|
Activity onCreate代码：
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| protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
notice = (NoticeVIew) findViewById(R.id.notice);
ArrayList<Bean> list = new ArrayList<>();
for (int i = 0; i < 10; i++) {
list.add(new Bean("title" + i, "value:" + i));
}
notice.setData(list);
}
|
