[英]How I can use an arrayadapter?
I'm beginner in a Android programming but i know something about Java. 我是Android编程的初学者,但我对Java有所了解。 I need to know how to insert a multiplication table in a
ListView
? 我需要知道如何在
ListView
插入一个乘法表吗? I do not have any idea how to do this. 我不知道该怎么做。
Here is what i have tried: 这是我尝试过的:
ArrayAdapter<String> adaptado = new ArrayAdapter<String>(Tablas_multDiego.this,android.R.layout.simple_list_item_1,tablas(1));
cmb_tabla.setAdapter(adaptado);
public String[] tablas(int tablas) {
String[] res = new String[10];
for (int i<=10;i++) {
res[i]= tablas + "x" + i + "" + tablas * i;
}
}
Thanks in advance. 提前致谢。
A fast way to do that: 一种快速的方法:
res / layout / list_item.xml res /布局/ list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSize="20sp" />
MainActivity.java MainActivity.java
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int yourNumber = 2;
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item,
tablas(yourNumber)));
ListView listView = getListView();
listView.setTextFilterEnabled(true);
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// When clicked, show a toast with the TextView text
Toast.makeText(getApplicationContext(),
((TextView) view).getText(), Toast.LENGTH_SHORT).show();
}
});
}
public String[] tablas(int tablas) {
String[] res = new String[10];
for (int i = 1; i <= 10; i++) {
res[i - 1] = tablas + " x " + i + " = " + tablas * i;
}
return res;
}
}
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