我正在构建一个使用保存的Android游戏。这意味着用户可以在游戏中打开最多5个独特的保存。创建新的保存,即时通讯使用SharedPreferences让用户输入保存名称并将其存储在我的SharedPreferences文件夹中,然后将用户重定向到主游戏Activity,其中包含Intent Extra,告诉游戏活动保存打开的内容。 / p>
在设计中一切听起来都不错,但出于某种原因我的应用程序只是让Force关闭。 我在eclipse中没有任何代码错误,甚至LogCat也没有显示任何错误。我不知道是什么 正在进行......
这是我的代码:
package ent.com;
import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
public class Saves extends ListActivity{
String saves[] = { "Empty save", "Empty save", "Empty save", "Empty save", "Empty save"};
public static String filename = "SharedData";
SharedPreferences someData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
someData = getSharedPreferences(filename, 0);
String save1 = someData.getString("0", "Empty save");
String save2 = someData.getString("1", "Empty save");
String save3 = someData.getString("2", "Empty save");
String save4 = someData.getString("3", "Empty save");
String save5 = someData.getString("4", "Empty save");
saves[0] = save1;
saves[1] = save2;
saves[2] = save3;
saves[3] = save4;
saves[4] = save5;
setListAdapter(new ArrayAdapter<String>(Saves.this, android.R.layout.simple_list_item_1, saves));
}
@Override
protected void onListItemClick(ListView l, View v,int position, long id) {
final String clicked = saves[position];
final String pos = getString(position);
super.onListItemClick(l, v, position, id);
if(clicked=="Empty save"){
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("Input name");
alert.setMessage("Give your team a name:");
// Set an EditText view to get user input
final EditText input = new EditText(this);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String value = input.getText().toString();
SharedPreferences.Editor editor = someData.edit();
editor.putString(pos, value);
editor.commit();
try{
Class Joe = Class.forName("ent.com.TestActivity");
Intent Joey = new Intent(Saves.this, Joe);
Joey.putExtra("save", clicked);
startActivity(Joey);
}catch(ClassNotFoundException e){
e.printStackTrace();
}
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Intent back = new Intent("ent.com.MENU");
startActivity(back);
}
});
alert.show();
}else{
try{
Class ourClass = Class.forName("ent.com.TestActivity");
Intent ourIntent = new Intent(Saves.this, ourClass);
ourIntent.putExtra("save", clicked);
startActivity(ourIntent);
}catch(ClassNotFoundException e){
e.printStackTrace();
}
}
}
}
感谢您的帮助。
答案 0 :(得分:1)
到目前为止,我认为这是一个很大的问题:
if (clicked=="Empty save")
==
用于数字和参考比较。你正在寻找:
if (clicked.equals("Empty save"))
实际上会比较有问题的字符串