不幸的是,ViewPager停止了错误?

时间:2016-04-27 13:54:31

标签: android listview android-viewpager

我正在尝试创建一个首先显示包含许多项目的ListView的应用,当用户点击特定项目时,下一个活动将打开以显示带有ViewPager的图片。

一开始我创建了ViewPager,我可以在图片之间滑动,但是当我尝试创建一个新的其他应用,首先显示ListView并点击其项目后应用程序ViewPager停止并显示此消息:“遗憾的是已停止”。应用程序开始在列表中显示项目,但是当用户点击应用程序停止工作我试图用 LogCat 找到错误,但它没有显示任何我不知道为什么!!!

主要课程

public class MainActivity extends Activity implements OnItemClickListener{

    ListView itemListView;
    String[] values;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        itemListView=(ListView)findViewById(R.id.itemListView);
        values=getResources().getStringArray(R.array.values);

        itemListView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,values));
        itemListView.setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {

        Intent i=new Intent(MainActivity.this,SwipeActivity.class);

        switch(itemListView.getItemAtPosition(position).toString()){

        case "First":
            i.putExtra("nextActivity", 1);
            startActivity(i);
            break;

        case "Second":
            i.putExtra("nextActivity", 2);
            startActivity(i);
            break;



        }

    }
}

SwipeActivity“类

public class SwipeActivity extends Activity{


ViewPager vp;
Table_customSwipeAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.activity_main);

    vp=(ViewPager)findViewById(R.id.view_pager);
    adapter=new Table_customSwipeAdapter(this);
    vp.setAdapter(adapter);

}
}

Table_customSwipeAdapter“class

public class Table_customSwipeAdapter extends PagerAdapter{


private int[] image_resources={R.drawable.i1,R.drawable.i2,R.drawable.i3,R.drawable.i4,R.drawable.i5};
private Context ctx;
private LayoutInflater layoutInflater;


public Table_customSwipeAdapter(Context ctx) {
    this.ctx=ctx;
}


@Override
public int getCount() {
    return image_resources.length;
}

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
    // TODO Auto-generated method stub
    return (arg0==(LinearLayout)arg1);
}


public Object instantiateItem(ViewGroup container, int position){

    layoutInflater=(LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View item_view=layoutInflater.inflate(R.layout.activity_table_custom_swipe_adapter, container,false);

    ImageView imageView=(ImageView)item_view.findViewById(R.id.image_view);
    TextView textView=(TextView)item_view.findViewById(R.id.image_count);
    imageView.setImageResource(image_resources[position]);
    textView.setText("Image "+(position+1));
    container.addView(item_view);

    return item_view;

}


public void destroyItem(ViewGroup container, int position, Object object){
    container.removeView((LinearLayout)object);

}

}

我认为在调用Table_customSwipeAdapter课程时会抛出异常,但在添加ListView之前我不知道应用为什么会有效?

0 个答案:

没有答案