我需要在微调器(android)中显示提示。
我试过不同的解决方案,但还没有解决问题,那么怎么做呢?
答案 0 :(得分:0)
我通过使用按钮代替Spinner来处理这个问题。 I have the sample project up on GitHub.
在项目中,我正在显示Spinner和按钮,以显示它们看起来确实相同。除了按钮,您可以将初始文本设置为您想要的任何内容(例如提示)。
这是活动的样子:
package com.stevebergamini.spinnerbutton;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Spinner;
public class MainActivity extends Activity {
Spinner spinner1;
Button button1;
AlertDialog ad;
String[] countries;
int selected = -1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner1 = (Spinner) findViewById(R.id.spinner1);
button1 = (Button) findViewById(R.id.button1);
countries = getResources().getStringArray(R.array.country_names);
// You can also use an adapter for the allert dialog if you'd like
// ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, countries);
ad = new AlertDialog.Builder(MainActivity.this).setSingleChoiceItems(countries, selected,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
button1.setText(countries[which]);
selected = which;
ad.dismiss();
}}).setTitle(R.string.select_country).create();
button1.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
ad.getListView().setSelection(selected);
ad.show();
}});
}
}
答案 1 :(得分:0)
试试这个:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item) {
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = super.getView(position, convertView, parent);
if (position == getCount()) {
((TextView)v.findViewById(android.R.id.text1)).setText("");
((TextView)v.findViewById(android.R.id.text1)).setHint(getItem(getCount())); //"Hint to be displayed"
}
return v;
}
@Override
public int getCount() {
return super.getCount()-1; // you dont display last item. It is used as hint.
}
};
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
adapter.add("Item 1");
adapter.add("Item 2");
adapter.add("Hint to be displayed");
spinner.setAdapter(adapter);
spinner.setSelection(adapter.getCount()); //displaying hint
github上的另一个例子:https://github.com/ravivyas84/AndroidSpinnerHint(作者Ravi Vyas)
如果它可以帮助你,你可以使用一点点作弊,你只需将文字颜色改为灰色即可。它可能在许多情况下都不起作用。
希望它有帮助!祝你好运!