[英]Android Studio getWritableDatabase(); is causing my app to crash
[英]Android Studio Spinner causing app to crash before it even opens
每当我在android studio模拟器中运行该应用程序时,它就会自动崩溃。 有人可以帮我解决我在这里犯的错误吗? 这只是特定的微调器代码。 但该链接具有该应用程序。
List < String > empSale = new ArrayList < String > ();
empSale.add("Sale Items:");
empSale.add("Apple iPhone 8");
empSale.add("Samsung Galaxy 9");
empSale.add("Asus Zenfone 10");
empSale.add("Nokia 3310");
spnSale = (Spinner) findViewById(R.id.spnSale);
spnSale.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) this);
//Spinner data
aA = new ArrayAdapter < String > (this, android.R.layout.simple_spinner_dropdown_item, empSale);
aA.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnSale.setAdapter(aA);
spnSale.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView << ? > parent, View view, int position, long id) {
String items = parent.getItemAtPosition(position).toString();
Toast.makeText(parent.getContext(), "Selected " + items, Toast.LENGTH_SHORT).show();
if (items.equals("Sale Items:")) {
//price = 0;
txtPrice.setText("Price: Php 0.00");
}
if (items.equals("Apple iPhone 8")) {
//price = 60000;
txtPrice.setText("Price: Php 60000.00");
}
if (items.equals("Samsung Galaxy 9")) {
//price = 55000;
txtPrice.setText("Price: Php 55000.00");
}
if (items.equals("Asus Zenfone 10")) {
//price = 50000;
txtPrice.setText("Price: Php 50000.00");
}
if (items.equals("Nokia 3310")) {
//price = 1000000;
txtPrice.setText("Price: Php 1000000.00");
}
}
});
没关系,我要做的就是删除aA.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
在aA = new ArrayAdapter < String > (this, android.R.layout.simple_spinner_dropdown_item, empSale);
简单只需删除项目单击侦听器上的微调器,因为onItemClick侦听器不适用于微调器。
spnSale = (Spinner) findViewById(R.id.spnSale);
spnSale.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) this);
//Spinner data
aA = new ArrayAdapter < String > (this,
android.R.layout.simple_spinner_dropdown_item, empSale);
aA.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spnSale.setAdapter(aA);
String item = spnSale.getItemSelected().toString();
if (items.equals("Sale Items:")) {
//price = 0;
txtPrice.setText("Price: Php 0.00");
}else
if (items.equals("Apple iPhone 8")) {
//price = 60000;
txtPrice.setText("Price: Php 60000.00");
}else
if (items.equals("Samsung Galaxy 9")) {
//price = 55000;
txtPrice.setText("Price: Php 55000.00");
}else
if (items.equals("Asus Zenfone 10")) {
//price = 50000;
txtPrice.setText("Price: Php 50000.00");
}else
if (items.equals("Nokia 3310")) {
//price = 1000000;
txtPrice.setText("Price: Php 1000000.00");
}
....
....
尝试这个
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