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こんにちは、このコードで私はlistitemのテキストを編集しようとしていると、リスト項目の最新のテキストを保存しても、ここでアプリケーションが閉じられた後でも、すでに編集テキストオプションでダイアログボックスのテキストを取得できますListItemの中だけで、事前に事前に定義されたこの小さなもので、任意のテキスト ヘルプへ 感謝を変更する必要がlistitemテキストを動的に編集して保存する方法は？
MainActivity.java：
package com.example.vks_module;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.jar.Attributes.Name;
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
private ListView mainListView;
private ArrayAdapter<String> listAdapter;
final Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainListView = (ListView) findViewById(R.id.lv1);
String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars",
"Jupiter", "Saturn", "Uranus", "Neptune" };
final ArrayList<String> planetList = new ArrayList<String>();
planetList.addAll(Arrays.asList(planets));
listAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, planetList);
mainListView.setAdapter(listAdapter);
mainListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int pos,
long id) {
String message = planetList.get(pos);
final int positions = mainListView.getSelectedItemPosition();
final Dialog dialog = new Dialog(context);
dialog.setContentView(R.layout.customdialog);
dialog.setTitle("Change the name");
final TextView plan_names = (TextView) dialog
.findViewById(R.id.name);
Button set = (Button) dialog.findViewById(R.id.Set);
plan_names.setText(message);
set.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String name = plan_names.getText().toString();
int pos = positions;
if (!name.isEmpty() && name.length() > 0) {
// remove
listAdapter.remove(planetList.get(pos));
// insert the updated one
listAdapter.insert(name, mainListView.getSelectedItemPosition());
listAdapter.notifyDataSetChanged();
} else {
Toast.makeText(getApplicationContext(),
"Are you serious", Toast.LENGTH_SHORT)
.show();
}
}
});
dialog.show();
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
**activitymain.xml**
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.vks_module.MainActivity" >
<ListView
android:id="@+id/lv1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:padding="10dp"
/>
</RelativeLayout>
**customedailog.xml**
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_blue_light"
android:orientation="vertical" >
<EditText
android:id="@+id/name"
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_centerHorizontal="true"
android:gravity="center_horizontal"
android:layout_marginTop="100dp"
android:background="@android:color/transparent" />
<Button
android:id="@+id/Set"
android:layout_below="@+id/name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp"
android:text="SET" />
</RelativeLayout>
**LOGCAT**
03-28 00:17:38.767: D/AndroidRuntime(26713): Shutting down VM
03-28 00:17:38.774: E/AndroidRuntime(26713): FATAL EXCEPTION: main
03-28 00:17:38.774: E/AndroidRuntime(26713): Process: com.example.vks_module, PID: 26713
03-28 00:17:38.774: E/AndroidRuntime(26713): java.lang.ArrayIndexOutOfBoundsException: length=10; index=-1
03-28 00:17:38.774: E/AndroidRuntime(26713): at java.util.ArrayList.get(ArrayList.java:310)
03-28 00:17:38.774: E/AndroidRuntime(26713): at com.example.vks_module.MainActivity$1$1.onClick(MainActivity.java:71)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.view.View.performClick(View.java:5204)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.view.View$PerformClick.run(View.java:21153)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.os.Handler.handleCallback(Handler.java:739)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.os.Handler.dispatchMessage(Handler.java:95)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.os.Looper.loop(Looper.java:148)
03-28 00:17:38.774: E/AndroidRuntime(26713): at android.app.ActivityThread.main(ActivityThread.java:5417)
03-28 00:17:38.774: E/AndroidRuntime(26713): at java.lang.reflect.Method.invoke(Native Method)
03-28 00:17:38.774: E/AndroidRuntime(26713): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
03-28 00:17:38.774: E/AndroidRuntime(26713): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
おかげでそれはうまくいきましたが、質問ごとに、私が編集したリストアイテムを保存する必要がありますか？ – Vitesh