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B. 进步障碍
原标题:Progress bar Visibility

我有一个非常简单的设想:首先,我必须做我的进度吧看不见<>em>,但是在纽伦点上,我不得不做看得见<><>>>>,以便完成我所执行的任务,直到我取得进展为止。

我正采用非常简单的方式。 我在XML中设置了进展条码,然后简单地放在了该活动的<编码>onCreate方法上,首先通过<代码>mProgress.setVisibility(4)加以看,然后在我点击试图再次使visible<>>>>的我的顿时。

但不幸的是,它没有工作! 没有人要回答为什么没有这样做。

mProgress = (ProgressBar) findViewById(R.id.progressBar);
mProgress.setVisibility(4);

btnSubmit.setOnClickListener(new OnClickListener() {
  public void onClick(View v) {
    strpatientid = txtpatientid.getText().toString();

    if (strpatientid.length() == 0) {
      Toast.makeText(getApplicationContext(),
                     "Enter the Patient ID",
                     Toast.LENGTH_LONG).show();
      return;
    }
    else {
      mProgress.setEnabled(false);
      mProgress.setVisibility(View.VISIBLE);
      setProgressBarVisibility(true);
    }
  }
问题回答

尝试这样做:

mProgress=(ProgressBar) findViewById(R.id.progressBar);

mProgress.setVisibility(View.INVISIBLE);

btnSubmit.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
    strpatientid = txtpatientid.getText().toString();
    if (TextUtils.isEmpty(strpatientid)) {
        Toast.makeText(getApplicationContext(),"Enter the Patient ID",
            Toast.LENGTH_LONG).show();
        mProgress.setVisibility(View.INVISIBLE);
        return;
    }

    else{
        //mProgress.setEnabled(false);   //you dont need this
        mProgress.setVisibility(View.VISIBLE);
        setProgressBarVisibility(true);
    }
}




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