我有一個相當簡單的佈局,其中有一個Spinner
,它有我自己的適配器連接到它。設置Spinner崩潰佈局的選擇
MyAdapter myAdap = new MyAdapter();
mySpinner.setAdapter(myAdap);
適配器有(從調試器)兩個項目:
myAdap.getCount() = 2
當我選擇設置爲1
雖然(0
作品),
mySpinner.setSelection(1);
應用程序崩潰:
10-05 19:37:17.122 19899-19899/nl.example.demo E/test: Exception 10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: FATAL EXCEPTION: main
10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: Process: example.demo, PID: 19899 10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: java.lang.NullPointerException
10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: at android.widget.TextView.makeNewLayout(TextView.java:6151)
10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: at android.widget.TextView.onMeasure(TextView.java:6427)
10-05 19:37:17.142 19899-19899/nl.example.demo E/AndroidRuntime: at android.view.View.measure(View.java:16643)
[..]
奇怪的是,這是適用於具有相同版本的Android的另一部手機,但屏幕較小。
MyAdapter
如下:
public class MyAdapter extends ArrayAdapter<String> {
static ArrayList<String> methods = null;
private LayoutInflater mInflater;
public MyAdapter(Context ctx) {
super(ctx, 0);
mInflater = LayoutInflater.from(ctx);
if (methods == null) {
methods = new ArrayList<String>();
methods.add("1");
methods.add("2");
methods.add("3");
}
}
@Override
public int getCount() {
return methods.size();
}
@Override
public String getItem(int position) {
return methods.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(android.R.layout.simple_spinner_item, null);
}
TextView tvLabel = (TextView)convertView.findViewById(android.R.id.text1);
tvLabel.setText("test");
return convertView;
}
}
更新我的Nexus 6沒有問題。
錯誤在您的'TextView'中,請分享您的MyAdapter類 –
@RahulParihar更新了我的問題 –
您確定這是Java嗎? – Onik