Question

我坚持试图在两个活动之间制作Page Slider的项目。

我知道每个活动都是独立运作的，但当我尝试设置PageAdapter进行滑动推杆时：

此外，我在Manifest中编写活动，在Java中初始化XML中的所有变量，但问题始于我为我的按钮设置onClickListener的那一刻。

LayoutInflater inflater = LayoutInflater.from（this）; List pages = new ArrayList（）;

View page = inflater.inflate(R.layout.photo, null);
pages.add(page);
page = inflater.inflate(R.layout.cameragrid, null);
pages.add(page);

CameraPagerAdapter pagerAdapter = new CameraPagerAdapter(pages);
ViewPager viewPager = new ViewPager(this);
viewPager.setAdapter(pagerAdapter);
viewPager.setCurrentItem(0);    //view being shown firstly

setContentView(viewPager);

而不是*setContentView(R.layout.photo);*它不会启动。我错过了什么？谢谢你提前。

第一项活动：

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    makeAdditionalPageSlide(); //>>> problems started here

    initialize();

    InputStream is = getResources().openRawResource(R.drawable.dinam);
    bmp = BitmapFactory.decodeStream(is);
}
public void makeAdditionalPageSlide(){
    LayoutInflater inflater = LayoutInflater.from(this);
    List<View> pages = new ArrayList<View>();

    View page = inflater.inflate(R.layout.photo, null);
    pages.add(page);
    page = inflater.inflate(R.layout.cameragrid, null);
    pages.add(page);

    CameraPagerAdapter pagerAdapter = new CameraPagerAdapter(pages);
    ViewPager viewPager = new ViewPager(this);
    viewPager.setAdapter(pagerAdapter);
    viewPager.setCurrentItem(0);    //view being shown firstly

    setContentView(viewPager); 


}

private void initialize() {
    // TODO Auto-generated method stub
    iv = (ImageView) findViewById (R.id.ivReturnedPic);
    ib = (ImageButton) findViewById (R.id.ibTakePic);
    b = (Button) findViewById(R.id.bSetWall);
    b.setOnClickListener(this);
    ib.setOnClickListener(this);
}
public void onClick(View v) {
    // TODO Auto-generated method stub
    switch (v.getId()){
    case R.id.bSetWall:
        try {
            getApplicationContext().setWallpaper(bmp);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        break;
    case R.id.ibTakePic:
        i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(i, cameraData);
    break;
    }
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK){
        Bundle extras = data.getExtras();
        bmp = (Bitmap) extras.get("data");
        iv.setImageBitmap(bmp);
    }
}

PageAdapter：

public class CameraPagerAdapter extends PagerAdapter  {
 List<View> pages = null;

    public CameraPagerAdapter(List<View> pages){
        this.pages = pages;
    }

    @Override
    public Object instantiateItem(View collection, int position){
        View v = pages.get(position);
        ((ViewPager) collection).addView(v, 0);
        return v;
    }

    @Override
    public void destroyItem(View collection, int position, Object view){
        ((ViewPager) collection).removeView((View) view);
    }

    @Override
    public int getCount(){
        return pages.size();
    }

    @Override
    public boolean isViewFromObject(View view, Object object){
        return view.equals(object);
    }

    @Override
    public void finishUpdate(View arg0){
    }

    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1){
    }

    @Override
    public Parcelable saveState(){
        return null;
    }

    @Override
    public void startUpdate(View arg0){
    }

} 第二个活动：

public class CameraGrid extends Activity implements OnItemClickListener{

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cameragrid);
    GridView gv = (GridView) findViewById(R.id.cameragrid);
    CameraImageAdapter ia = new CameraImageAdapter(getApplicationContext());
    gv.setAdapter(ia);
    //gridview.setOnItemClickListener(this); 
    gv.setOnItemClickListener(this);
}

public void onItemClick(AdapterView<?> arg0, View iv, int position, long id) {
    // TODO Auto-generated method stub
    Toast.makeText(getApplicationContext(), ""+position, Toast.LENGTH_LONG).show();

    Intent i = new Intent(getApplicationContext(),CameraImageDetails.class);
    i.putExtra("id", position);
    startActivity(i);

}

}

Answer 1

我的建议是使用ViewPager和setContentView（R.layout.mainActivity）的占位符制作mainActivity.xml布局

与PageViewAdapter中的页面视图内容相关的内容。

也许我不太明白你试图做的逻辑，但它似乎有点令人困惑......：S

坚持两个活动之间的滑动

1 个答案: