Hi!
I'm junior in andoid programming.
I would like to make a application in which there is an edit text and
if you write in a number and press a button, it would dinamically show
as many textview lines as the given number. The problem is that I
cannot number the textview lines. For example, if I write ten in the
edit text and press the button than number 9 will appear at the
beginning of all the lines. Could you help me with this problem?
Java:
package com.novoda;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.ListActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SimpleAdapter;
public class DynamicListItems extends ListActivity {
private static final String ITEM_KEY = "key";
ArrayList<HashMap<String, String>> list = new
ArrayList<HashMap<String, String>>();
private EditText newValue;
private SimpleAdapter notes;
private int szam = 0;
private int[] tomb = new int[10];
private String[] key = new String[10];
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dynamic_list);
newValue = (EditText) findViewById(R.id.new_value_field);
notes = new SimpleAdapter(
this,
list,
R.layout.row,
new String[] { ITEM_KEY },
new int[] { R.id.list_value });
Button ib = (Button) findViewById(R.id.button);
ib.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
try {
szam =
Integer.valueOf(newValue.getText().toString()).intValue();
HashMap<String, String> item = new
HashMap<String, String>();
list.clear();
for(int i = 0;i < szam;i++){
item.put(ITEM_KEY, i+". line");
list.add(item);
}
setListAdapter(notes);
} catch (NullPointerException e) {
Log.i("[Dinamikus elemek]", "Megpróbáltál
hozzáadni egy null értéket.");
}
}
});
}
}
dynamic_list.xml
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TableLayout android:id="@+id/TableLayout01"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_width="fill_parent">
<EditText android:id="@+id/new_value_field"
android:textColor="#020905"
android:layout_marginTop="6px"
android:layout_marginBottom="8px"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="2px"
android:layout_marginRight="2px" />
<Button android:text="Press" android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></Button>
</TableLayout>
<ListView android:id="@+id/android:list"
android:layout_width="fill_parent"
android:layout_height="0px" android:layout_weight="1"
android:cacheColorHint="#00000000">
</ListView>
</LinearLayout>
row.xml
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#00000000">
<TextView android:id="@+id/list_value"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
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