怎么实现 scrollview的左右拖拽换页

发布网友发布时间：2022-04-26 15:28

共1个回答

热心网友时间：2023-10-11 21:35

现在我做的是viewpager+HorizontalScrollView 实现来回切屏，并且title可以左右拖拽.转载
　　代码片段

　　/***
* 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);
}
　　
　　 /***
* 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);
}
}
　　 /***
* 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);
}

}
}
　　/***
* 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);
}

}
　　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，