我认为,再也没有比这更凌乱的代码了……
package com.locke.android;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
public class DataAdapeterActivity extends Activity {
private static SharedPreferences settingActivity;
static final int DIALOG_ALERT_ID = 0;
static final int DIALOG_CONFIRM_ID = 1;
static final int DIALOG_SHOW = 2;
static final String KEY_NAME = "name";
private Button buttonSave,buttonLoad;
private Editor editor;
private TextView textName;
private String inputName,message,storedName;
/*构建对话框*/
protected Dialog onCreateDialog(int id){
Dialog dialog;
switch(id){
case DIALOG_ALERT_ID:
dialog = new AlertDialog.Builder(this)
.setMessage(message)
.setPositiveButton(android.R.string.ok,new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).create();
break;
case DIALOG_CONFIRM_ID:
dialog = new AlertDialog.Builder(this)
.setMessage("确认覆盖吗名字?")
.setPositiveButton(android.R.string.ok,new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
saveItem2Settings();
dialog.dismiss();
}
})
.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
})
.create();
break;
case DIALOG_SHOW:
dialog = new AlertDialog.Builder(this)
.setMessage(getName())
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).create();
break;
default:
dialog = null;
break;
}
return dialog;
}
/* Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
settingActivity = getPreferences(MODE_PRIVATE);
textName = (TextView)findViewById(R.id.text_name);
buttonSave = (Button)findViewById(R.id.button_save);
buttonLoad = (Button)findViewById(R.id.button_get);
/*保存按钮*/
buttonSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
inputName = textName.getText().toString();
if(inputName==null || inputName=="" || inputName.length()==0){
showDialog("请输入名字!");
return;
}
if(settingActivity.contains(KEY_NAME)){
showDialog(DIALOG_CONFIRM_ID);
return;
}
saveItem2Settings();
showDialog("保存成功!");
}
});
/*读取*/
buttonLoad.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
showDialog(DIALOG_SHOW);
}
});
}
/*保存一对键值*/
private void saveItem2Settings(){
inputName = textName.getText().toString();
editor = settingActivity.edit();
editor.putString(KEY_NAME,inputName);
editor.commit();
removeDialog(DIALOG_SHOW);
}
/*弹出消息*/
private void showDialog(String msg){
message = msg;
showDialog(DIALOG_ALERT_ID);
}
/*获取名称*/
private String getName(){
return settingActivity.getString(KEY_NAME,"无值");
}
}