ViewPaper里面的layout怎么动态改变

Question

layoutviewpager

Answer 1

public class CopyOfViewPaperActivity extends Activity implements OnPageChangeListener {
private ViewPager vp;
private MyAdapter vpAdapter;
//private ViewPagerAdapter vpAdapter;
private List<View> views;
private GridView attamGridView;
private TextView text;
private Button addattach;
// \u5e95\u90e8\u5c0f\u70b9\u56fe\u7247
private ImageView[] dots; // \u8bb0\u5f55\u5f53\u524d\u9009\u4e2d\u4f4d\u7f6e
private int currentIndex;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
addattach = (Button) findViewById(R.id.addattachment);
addattach.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addattach();
vpAdapter.notifyDataSetChanged();
}
});
//addattach();
// \u521d\u59cb\u5316\u9875\u9762
initViews(); // \u521d\u59cb\u5316\u5e95\u90e8\u5c0f\u70b9
initDots();
} private void initViews() {
LayoutInflater inflater = LayoutInflater.from(this); views = new ArrayList<View>();
// \u521d\u59cb\u5316\u5f15\u5bfc\u56fe\u7247\u5217\u8868
views.add(inflater.inflate(R.layout.layout1, null));
views.add(inflater.inflate(R.layout.layout2, null));
views.add(inflater.inflate(R.layout.layout3, null)); // \u521d\u59cb\u5316Adapter
//vpAdapter = new ViewPagerAdapter(views,this);
vpAdapter = new MyAdapter();

vp = (ViewPager) findViewById(R.id.viewpager);
vp.setAdapter(vpAdapter);
// \u7ed1\u5b9a\u56de\u8c03
vp.setOnPageChangeListener(this);
} private void initDots() {
LinearLayout group = (LinearLayout) findViewById(R.id.viewGroup); dots = new ImageView[views.size()]; // \u5faa\u73af\u53d6\u5f97\u5c0f\u70b9\u56fe\u7247
for (int i = 0; i < views.size(); i++) {
ImageView imageView = new ImageView(this);  
            imageView.setLayoutParams(new LayoutParams(10,10));  
            dots[i] = imageView;  
            if(i == 0){  
             dots[i].setBackgroundResource(R.drawable.page_indicator_focused);  
            }else{  
             dots[i].setBackgroundResource(R.drawable.page_indicator_unfocused);  
            }  
              
            LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,    
                    LayoutParams.WRAP_CONTENT));  
            layoutParams.leftMargin = 5;  
            layoutParams.rightMargin = 5;  
            group.addView(imageView, layoutParams);
} currentIndex = 0;
dots[currentIndex].setEnabled(false);// \u8bbe\u7f6e\u4e3a\u767d\u8272\uff0c\u5373\u9009\u4e2d\u72b6\u6001
} // \u5f53\u6ed1\u52a8\u72b6\u6001\u6539\u53d8\u65f6\u8c03\u7528
@Override
public void onPageScrollStateChanged(int arg0) {
} // \u5f53\u5f53\u524d\u9875\u9762\u88ab\u6ed1\u52a8\u65f6\u8c03\u7528
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
} // \u5f53\u65b0\u7684\u9875\u9762\u88ab\u9009\u4e2d\u65f6\u8c03\u7528
@Override
public void onPageSelected(int arg0) {
// \u8bbe\u7f6e\u5e95\u90e8\u5c0f\u70b9\u9009\u4e2d\u72b6\u6001
//setCurrentDot(arg0);
 setImageBackground(arg0 % 3); 
}

public class MyAdapter extends PagerAdapter{  
  
        @Override  
        public int getCount() {  
         if (views != null) {
     return views.size();
     }
     return 0;
        }  
        @Override  
        public boolean isViewFromObject(View arg0, Object arg1) {  
            return arg0 == arg1;  
        }  
        // \u9500\u6bc1arg1\u4f4d\u7f6e\u7684\u754c\u9762
     @Override
     public void destroyItem(View arg0, int arg1, Object arg2) {
     ((ViewPager) arg0).removeView(views.get(arg1));
     } 
        /** 
         * \u8f7d\u5165\u56fe\u7247\u8fdb\u53bb\uff0c\u7528\u5f53\u524d\u7684position \u9664\u4ee5 \u56fe\u7247\u6570\u7ec4\u957f\u5ea6\u53d6\u4f59\u6570\u662f\u5173\u952e 
         */  
        @Override  
        public Object instantiateItem(View arg0, int arg1) {
         ((ViewPager) arg0).addView(views.get(arg1), 0);
     return views.get(arg1);  
        }  
    }  
    /** 
     * \u8bbe\u7f6e\u9009\u4e2d\u7684tip\u7684\u80cc\u666f 
     * @param selectItems 
     */  
    private void setImageBackground(int selectItems){  
        for(int i=0; i<dots.length; i++){  
            if(i == selectItems){  
             dots[i].setBackgroundResource(R.drawable.page_indicator_focused);  
            }else{  
             dots[i].setBackgroundResource(R.drawable.page_indicator_unfocused);  
            }  
        }  
    }  
    public void addattach(){
     LinearLayout layout = (LinearLayout) getLayoutInflater().inflate(R.layout.layout1, null);
     text = (TextView) layout.findViewById(R.id.text);
     text.setText("aaaa");
    }}刚才发的有点问题