checkBox中只用数字问题以及AsyncActivity中使用ProgressDialog

cb=(CheckBox)findViewById(R.id.cek); 
 
cb.setOnClickListener(new OnClickListener() {  // checkbox listener 
    public void onClick(View v) { 
        // Perform action on clicks, depending on whether it's now checked 
        if (((CheckBox) v).isChecked()) { 
            tv1.setVisibility(0);  //visible==0 
            et3.setVisibility(0); 
        } else if (((CheckBox) v).isChecked() == false) { 
            tv1.setVisibility(2); //gone=2   
                et3.setVisibility(2); 
        } 
    } 
});

 

这里不能使用数字 直接使用gone等不然没有效果，

2.

class AddTask extends AsyncTask<Void, Item, Void> { 
 
    protected void onPreExecute() { 
       // pDialog = ProgressDialog.show(MyActivity.this,"Please wait...", "Retrieving data ...", true); = new ProgressDialog(viewContacts.this); 
        dialog.setMessage(getString(R.string.please_wait_while_loading)); 
        dialog.setIndeterminate(true); 
        dialog.setCancelable(false); 
        dialog.show(); 

    }  
    protected Void doInBackground(Void... unused) { 
        items = parser.getItems(); 
 
        for (Item it : items) { 
            publishProgress(it); 
        } 
        return(null); 
    } 
 
    protected void onProgressUpdate(Item... item) { 
        adapter.add(item[0]); 
    } 
 
    protected void onPostExecute(Void unused) { 
        pDialog.dismiss(); 
    } 
  }