[英]Android Dialog box, change widget visibility
This is my code, please suggest why the Progressbar do not go invisible to show the TextView. 这是我的代码,请提出为什么进度栏不变得不可见以显示TextView的原因。 I am switching the visibility initially and on Post execution yet I get only the progress bar showing but not the textview showing.
我最初切换可见性并且在执行后切换,但是我只显示进度条,而不显示textview。 Any suggestion?
有什么建议吗?
public class myClass extends BaseActivity implements View.OnClickListener{
Button mSaveButton;
final Context context = this;
Dialog dialog;
TextView text;
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
getSupportActionBar().hide();
mSaveButton = (Button)findViewById(R.id.saveBtn);
findViewById(R.id.txt_left_menu).setOnClickListener(this);
findViewById(R.id.saveBtn).setOnClickListener(this);
}
@Override
public void onClick(View view) {
if (view.getId() == R.id.saveBtn){
dialog = new Dialog(context);
dialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.alert_layout);
text = (TextView) dialog.findViewById(R.id.text);
progressBar = (ProgressBar) dialog.findViewById(R.id.progressBar);
progressBar.setVisibility(View.VISIBLE);
text.setVisibility(View.INVISIBLE);
dialog.show();
new myTask().execute();
}
}
class myTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
// some preExecute statements
}
@Override
protected Void doInBackground(Void... params) {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// some execution statements
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
progressBar.setVisibility(View.INVISIBLE);
text.setVisibility(View.VISIBLE);
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
dialog.dismiss();
finish();
}
@Override
public void onBackPressed() {
finish();
}
} }
This is my alert box layout it is a custom dialog box, so I can get a progress bar. 这是我的警报框布局,它是一个自定义对话框,因此我可以获得进度栏。
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Payment Received"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<ProgressBar
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:id="@+id/progressBar"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"/>
</RelativeLayout>
您必须在onPostExecute
ProgressBar
的可见性更改为GONE
progressBar.setVisibility(View.GONE);
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