Java 根据微调器中选择的值设置imageView src
我一直在尝试根据从微调器中选择的值设置ImageView(默认为空)。 因此在Java 根据微调器中选择的值设置imageView src,java,android,spinner,Java,Android,Spinner,我一直在尝试根据从微调器中选择的值设置ImageView(默认为空)。 因此在mainActivity.java中 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); sp_home = (Spinner) findViewById(R.id.sp
mainActivity.java中
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp_home = (Spinner) findViewById(R.id.spinner_home_team);
sp_away = (Spinner) findViewById(R.id.spinner_away_team);
sp_home.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
if (!sp_home.getSelectedItem().toString().equals("Seleziona Squadra")) {
setTeamLogo(sp_home.getSelectedItem().toString(), "home");
}
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
sp_away.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
if (!sp_away.getSelectedItem().toString().equals("Seleziona Squadra")) {
setTeamLogo(sp_away.getSelectedItem().toString(), "away");
}
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
引发的异常是:
android.content.res.Resources$NotFoundException:字符串资源ID#0x0
知道为什么我使用图像的名称而不是变量teamName,那么一切都会完美地工作吗 使用String.valueOf()
如果您给它传递一个整数,它将尝试查找对应的字符串资源id—它找不到,这是您的错误
查看此帖子:-
您的代码实际上修复了异常,但没有剩余变量为0,似乎忽略了存储在teamName中的值。奇怪的是,如果我在Toast消息中打印teamName的值,它会正确显示。
private void setTeamLogo(String teamName, String home_or_away_team){
int resId = getResources().getIdentifier(teamName, "drawable", getPackageName());
Toast.makeText(getBaseContext(), resId,
Toast.LENGTH_LONG).show();
}