源码:http://files.cnblogs.com/android100/ViewPaperDemo.rar
首先我们先看一个效果:
前两个是网易的,它做的title不能拖拽,。不过点击动画效果挺不错的,有待学习啊,后面两个是搜狐的,它做的效果不错,(注意看title)可以左右拖拽的,因为比较多嘛。
下面这两个图不错,是多米音乐客户端.它可以来回切换屏幕,(重要的是没有出现向viewpager动画那么恶心状态)这个做的很棒,
现在我做的是viewpager+HorizontalScrollView 实现来回切屏,并且title可以左右拖拽.
代码片段
<span style="font-size:16px;">/**** init view
*/
void InItView() {
pageViews = new ArrayList<View>();
View view01 = getLocalActivityManager().startActivity("activity01",
new Intent(this, MainActivity1.class)).getDecorView();
View view02 = getLocalActivityManager().startActivity("activity02",
new Intent(this, MainActivity2.class)).getDecorView();
View view03 = getLocalActivityManager().startActivity("activity02",
new Intent(this, MainActivity3.class)).getDecorView();
View view04 = getLocalActivityManager().startActivity("activity03",
new Intent(this, MainActivity4.class)).getDecorView();
View view05 = getLocalActivityManager().startActivity("activity04",
new Intent(this, MainActivity5.class)).getDecorView();
View view06 = getLocalActivityManager().startActivity("activity05",
new Intent(this, MainActivity6.class)).getDecorView();
pageViews.add(view01);
pageViews.add(view02);
pageViews.add(view03);
pageViews.add(view04);
pageViews.add(view05);
pageViews.add(view06);
}</span>
<span style="font-size:16px;"> /***
* init title
*/
void InItTitle() {
int width = getWindowManager().getDefaultDisplay().getWidth() / 5;
for (int i = 0; i < title.length; i++) {
RadioButton radioButton = new RadioButton(this, null,
R.style.radioButton);
radioButton.setText(title[i]);
radioButton.setTextSize(17);
radioButton.setTextColor(com.jj.viewpager.R.color.black);
radioButton.setWidth(width);
radioButton.setHeight(height);
radioButton.setGravity(Gravity.CENTER);
radioGroup.addView(radioButton);
}
}</span> <span style="font-size:16px;"> /***
* init title
*/
void InItTitle1() {
textViews = new ArrayList<TextView>();
int width = getWindowManager().getDefaultDisplay().getWidth() / 5;
int height = 70;
for (int i = 0; i < title.length; i++) {
TextView textView = new TextView(this);
textView.setText(title[i]);
textView.setTextSize(17);
textView.setTextColor(com.jj.viewpager.R.color.black);
textView.setWidth(width);
textView.setHeight(height - 30);
textView.setGravity(Gravity.CENTER);
textView.setId(i);
textView.setOnClickListener(this);
textViews.add(textView);
// 分割线
View view = new View(this);
LinearLayout.LayoutParams layoutParams = new LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layoutParams.width = 1;
layoutParams.height = height - 40;
layoutParams.gravity = Gravity.CENTER;
view.setLayoutParams(layoutParams);
view.setBackgroundColor(com.jj.viewpager.R.color.gray);
linearLayout.addView(textView);
if (i != title.length - 1) {
linearLayout.addView(view);
}
}
}</span> <span style="font-size:16px;">/***
* 选中效果
*/
public void setSelector(int id) {
for (int i = 0; i < title.length; i++) {
if (id == i) {
Bitmap bitmap = BitmapFactory.decodeResource(getResources(),
R.drawable.grouplist_item_bg_normal);
textViews.get(id).setBackgroundDrawable(
new BitmapDrawable(bitmap));
textViews.get(id).setTextColor(Color.RED);
viewPager.setCurrentItem(i);
}
else {
textViews.get(i).setBackgroundDrawable(new BitmapDrawable());
textViews.get(i).setTextColor(com.jj.viewpager.R.color.black);
}
}
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
linearLayout = (LinearLayout) findViewById(R.id.ll_main);
viewPager = (ViewPager) findViewById(R.id.pager);
horizontalScrollView = (HorizontalScrollView) findViewById(R.id.horizontalScrollView);
InItTitle1();
setSelector(0);
InItView();
viewPager.setAdapter(new myPagerView());
viewPager.clearAnimation();
viewPager.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int arg0) {
setSelector(arg0);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onClick(View v) {
setSelector(v.getId());
}
class myPagerView extends PagerAdapter {
// 显示数目
@Override
public int getCount() {
return pageViews.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public int getItemPosition(Object object) {
// TODO Auto-generated method stub
return super.getItemPosition(object);
}
@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
// TODO Auto-generated method stub
((ViewPager) arg0).removeView(pageViews.get(arg1));
}
/***
* 获取每一个item, 类于listview中的getview
*/
@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(pageViews.get(arg1));
return pageViews.get(arg1);
}
}</span>
实现起来不难,主要用了HorizontalScrollView 这个实现左右拖拽功能,网上大部分都是用RadioButton实现的,可是觉得有点复杂,我们何不直接对Textview进行控制呢,
样式如下:
主要看title可以来回拖拽,主要是实现这个功能,其实很简单,看上面代码我想你一下就ok了。
现在说一下问题”首先,我们用的是viewpager来实现,滑动的时候效果很不错,可是当我们点击title切换屏幕的时候,效果就难看了,因为viewpager动画的缘故,如果由1屏-6屏,则它会动画经过2,3,4,5,效果是相当的难看,想找个方案禁止动画,可没有找到,如果知道的朋友麻烦告诉下,谢谢在先了。“ 还有就是可以拖拽的标题分页,最好和activitygroup运用.搜狐那个就很不错.实在不行重写viewpaper吧,不过有点复杂,有时间了研究下.这里对viewpager只是简单用一下,不过前面几节都讲过,禁止屏幕滑动和缩回效果等.