本人开发的开发者技术变现资源聚集地,大家支持下，下面是网址
https://www.baiydu.com
这里实现的功能是从主页布局的fragment点击跳转到一个acitivity,然后顶部是一个切换的segment底部部是一个listview,点击segment分段让listview加载不同的内容。我这里没再使用viewpager，应该使用viewpager+listview也能实现。我这里使用的算是一个自定义的viewpager。下面我主要围绕TranslateAnimation segment切换动画类来谈，这东西吭比较多，我原本也是才做android开发的， 它这个类实现动画很多效果上的bug，效果bug直接说明android这个动画类没ios做的好，我遇到的这些效果bug主要出现在控件移动的距离和移动时间上的计算上。比如移动动画带有缓冲，或则移动分段两个以上，就没有动画效果。
下面先帖上布局,主要就是
<?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="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:background="@color/white_color"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:textSize="@dimen/title_fontsize"
android:text="在线视频"
android:textColor="@color/navigation_title_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="53dp"
android:orientation="vertical"
android:animateLayoutChanges="true"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal"
>
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:layout_weight="1"
android:textSize="@dimen/title_fontsize"
android:text="推荐"
android:id="@+id/tuijianVideo"
android:textColor="@color/hot_price_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:textSize="@dimen/title_fontsize"
android:layout_weight="1"
android:text="电影"
android:id="@+id/dianying"
android:textColor="@color/navigation_title_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:textSize="@dimen/title_fontsize"
android:text="电视"
android:id="@+id/dianshi"
android:layout_weight="1"
android:textColor="@color/navigation_title_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:textSize="@dimen/title_fontsize"
android:text="动漫"
android:layout_weight="1"
android:id="@+id/dongman"
android:textColor="@color/navigation_title_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
<TextView
android:layout_width="match_parent"
android:layout_height="@dimen/navigationbar_height"
android:textSize="@dimen/title_fontsize"
android:text="综艺"
android:id="@+id/zongyi"
android:layout_weight="1"
android:textColor="@color/navigation_title_color"
android:background="@color/navigationbar_backround_color"
android:gravity="center"/>
</LinearLayout>
<ImageView
android:layout_width="match_parent"
android:id="@+id/Imagezhishiqi"
android:layout_height="3dp"
android:background="@color/hot_price_color"/>
</LinearLayout>
<com.lt.WBTaoBaoKe.custom.xPullRefresh.XListView
android:id="@+id/xListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent" android:cacheColorHint="#00000000">
</com.lt.WBTaoBaoKe.custom.xPullRefresh.XListView>
</LinearLayout>下面贴代码,有动画说明的详细注视
public class HomeFragment_VideoActivity extends Activity implements View.OnClickListener {
private ListViewAdapter listViewAdapter;
private ViewPagerAdapter viewPagerAdapter;
private Context context;
private LinearLayout.LayoutParams zhishiqilinearParams;
private int zhishiqiWidth;
private ImageView zhishiqi;
private TextView tuijianView;
private TextView dianying;
private TextView dianshi;
private TextView dongman;
private TextView zongyi;
private int currentTopItemIndex;
private TranslateAnimation moveAnimation;
private int moveStepValue;
//视频数据
private XListView listView;
private JSONArray CurrentVideoDataArray;
private int currentVideoPageIndex;
private String refreshTime = "第一次刷新";
private ViewGroup.MarginLayoutParams margin;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
context = getApplicationContext();
setContentView(R.layout.home_video_activity);
//指示器
zhishiqi = (ImageView) findViewById(R.id.Imagezhishiqi);
currentTopItemIndex = 1;
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int width = dm.widthPixels;
//由于我们分段是固定的5段，所以这里先使用手机屏幕宽度/5，计算出分段指示器的宽度
zhishiqiWidth = width / 5;
//由于在固定布局中无法准确设置出指示器的宽度，所以这里需要使用计算出的宽度重新设置指示器宽度
zhishiqilinearParams = (LinearLayout.LayoutParams) zhishiqi.getLayoutParams();
zhishiqilinearParams.width = zhishiqiWidth;
zhishiqi.setLayoutParams(zhishiqilinearParams);
//下面都是每个分段里面显示文字的textview控件
tuijianView = (TextView) findViewById(R.id.tuijianVideo);
dianying = (TextView) findViewById(R.id.dianying);
dianshi = (TextView) findViewById(R.id.dianshi);
dongman = (TextView) findViewById(R.id.dongman);
zongyi = (TextView) findViewById(R.id.zongyi);
tuijianView.setTag(1);
dianying.setTag(2);
dianshi.setTag(3);
dongman.setTag(4);
zongyi.setTag(5);
tuijianView.setOnClickListener(this);
dianying.setOnClickListener(this);
dianshi.setOnClickListener(this);
dongman.setOnClickListener(this);
zongyi.setOnClickListener(this);
}
//每个分段textview点击事件
@Override
public void onClick(View v) {
int tag = (Integer) v.getTag();
//获得控件移动的段数确定移动方向,如果是正数表示向右移动，负数左移动
moveStepValue = tag - currentTopItemIndex;
switch (tag) {
case 1:
if (currentTopItemIndex == 1) {
return;
} else {
currentTopItemIndex = tag;
tuijianView.setTextColor(this.getResources().getColor(R.color.hot_price_color));
dianying.setTextColor(this.getResources().getColor(R.color.white_color));
dianshi.setTextColor(this.getResources().getColor(R.color.white_color));
dongman.setTextColor(this.getResources().getColor(R.color.white_color));
zongyi.setTextColor(this.getResources().getColor(R.color.white_color));
}
break;
case 2:
if (currentTopItemIndex == 2) {
return;
} else {
currentTopItemIndex = tag;
tuijianView.setTextColor(this.getResources().getColor(R.color.white_color));
dianying.setTextColor(this.getResources().getColor(R.color.hot_price_color));
dianshi.setTextColor(this.getResources().getColor(R.color.white_color));
dongman.setTextColor(this.getResources().getColor(R.color.white_color));
zongyi.setTextColor(this.getResources().getColor(R.color.white_color));
}
break;
case 3:
if (currentTopItemIndex == 3) {
return;
} else {
currentTopItemIndex = tag;
tuijianView.setTextColor(this.getResources().getColor(R.color.white_color));
dianying.setTextColor(this.getResources().getColor(R.color.white_color));
dianshi.setTextColor(this.getResources().getColor(R.color.hot_price_color));
dongman.setTextColor(this.getResources().getColor(R.color.white_color));
zongyi.setTextColor(this.getResources().getColor(R.color.white_color));
}
break;
case 4:
if (currentTopItemIndex == 4) {
return;
} else {
currentTopItemIndex = tag;
tuijianView.setTextColor(this.getResources().getColor(R.color.white_color));
dianying.setTextColor(this.getResources().getColor(R.color.white_color));
dianshi.setTextColor(this.getResources().getColor(R.color.white_color));
dongman.setTextColor(this.getResources().getColor(R.color.hot_price_color));
zongyi.setTextColor(this.getResources().getColor(R.color.white_color));
}
break;
default:
if (currentTopItemIndex == 5) {
return;
} else {
currentTopItemIndex = tag;
tuijianView.setTextColor(this.getResources().getColor(R.color.white_color));
dianying.setTextColor(this.getResources().getColor(R.color.white_color));
dianshi.setTextColor(this.getResources().getColor(R.color.white_color));
dongman.setTextColor(this.getResources().getColor(R.color.white_color));
zongyi.setTextColor(this.getResources().getColor(R.color.hot_price_color));
}
break;
}
margin = new ViewGroup.MarginLayoutParams(tuijianView.getLayoutParams());
//Animation.RELATIVE_TO_SELF, 0.0f,这两个其实是一个参数(合并一起看，表示相对定位+坐标变动值)，所以只看2/4/6/8这4个参数
//第一个值:0.0f表示控件的原始x坐标不变动。
//第二个值moveStepValue*0.5f表示原始x坐标前提下变动的值
//第三个值0.0f表示y坐标变动
//第四个值0.0f表示原始y坐标前提下变动的值
//重点:这里由于我们只是x坐标左右移动,所以y轴的值一只不变动0.0f 0.0f
//当moveStepValue为负数时，moveStepValue*0.5f segment是往左移动,正数往右移动，这样动画效果才不会有bug，
moveAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f,
Animation.RELATIVE_TO_SELF, moveStepValue * 0.5f, Animation.RELATIVE_TO_SELF,
0.0f, Animation.RELATIVE_TO_SELF, 0.0f);
//下面的代码是计算动画的执行时间，如果不计算就会出现切换分段数量不一致,指示器的动画执行速度太快或太慢。
if (moveStepValue < 1) {
moveStepValue = moveStepValue * -1;
}
moveAnimation.setDuration(moveStepValue * 70);
moveAnimation.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationRepeat(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
zhishiqi.clearAnimation();
//移动效果实现之后，还需要将移动segment分段的margin设置一次，如果不设置动画又会反回去，为什么这样我觉得应该是和android是使用xhtml布局的原因。
zhishiqilinearParams.setMargins((currentTopItemIndex - 1) * zhishiqiWidth, margin.topMargin, zhishiqiWidth, zhishiqilinearParams.height);
zhishiqi.setLayoutParams(zhishiqilinearParams);
}
});
zhishiqi.startAnimation(moveAnimation);
zhishiqi.setVisibility(View.VISIBLE);
}
}
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