SharedPreferences 保存用户设置参数

[hzgmm]

不知道这样写，有什么问题，总之是没有保存设置的参数。参数设置后，退出来再进去，还是默认的设置。

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Timer;
import java.util.TimerTask;

import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnKeyListener;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;

public class MainActivity extends Activity {
	private ListView mListView;
	private List<Map<String, Object>> data;
	private ArrayAdapter<String> adapter;
	private ArrayAdapter<String> adapter1;
	private String[] m;
	private String[] arrMenuItemName;
	private String[] arrNumber;
	CustomListAdapter listAdapter;

	 private final String PREFERENCES_NAME="survey";
	 public static final String POS = "NAME"; 
	 public static final String FIRST_RUN = "first";
	 boolean first;
	 
	@Override
	public void onCreate(Bundle savedInstanceStated) {
		super.onCreate(savedInstanceStated);
		
		setContentView(R.layout.list_view);
		m = this.getResources().getStringArray(R.array.switcher);
		
		arrMenuItemName= this.getResources().getStringArray(R.array.menu_array);
		
		arrNumber = this.getResources().getStringArray(R.array.number_array);
		
		adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, m);
		
		adapter1 = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, arrNumber);
		
		mListView = (ListView) findViewById(R.id.list_view_id);
		
		data = getData();
		listAdapter = new CustomListAdapter();
		mListView.setAdapter(listAdapter);
		
		
		mListView.setOnKeyListener(new OnKeyListener() {

			public boolean onKey(View arg0, int arg1, KeyEvent arg2) {
				// TODO Auto-generated method stub
				
				return false;
			}
			
		});
	}
	
	public boolean onKeyDown(int keyCode, KeyEvent event){
//		System.out.println("FFFFFFFFFF     "+ mListView.getSelectedItemPosition());
		int pos = mListView.getSelectedItemPosition();

		if (pos >= 0) {
			int i = 0;
			if (event.getAction() == KeyEvent.ACTION_DOWN) {
				switch (keyCode) {
				case KeyEvent.KEYCODE_DPAD_LEFT:
					i = (Integer) data.get(pos).get("sss");
					i = i - 1;
					if (i < 0) 
					{
						switch(pos){
						case 0:
							i = m.length - 1;
							break;
						case 1:
							i = m.length - 1;
							break;
						case 2:
							i = arrNumber.length - 1;
							break;
						}
						
					}
					
					data.get(pos).put("sss", i);
					listAdapter.notifyDataSetChanged();
					return true;

				case KeyEvent.KEYCODE_DPAD_RIGHT:
					i = (Integer) data.get(pos).get("sss");
					i = i + 1;
					switch(pos)
					{
					case 0:
						if (i >= m.length) i = 0;
						break;
					case 1:
						if (i >= m.length) i = 0;
						break;
					case 2:
						if (i >= arrNumber.length) i = 0;
						break;
					}
					
					data.get(pos).put("sss", i);
					listAdapter.notifyDataSetChanged();
					return true;
				}
			}
		}
		 return super.onKeyDown(keyCode, event);
	}
	private List<Map<String, Object>> getData() {
		List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
		Map<String, Object> map;
		for(int i = 0; i< arrMenuItemName.length;i++){
			map = new HashMap<String, Object>();
			map.put("menuText", arrMenuItemName[i]);
			map.put("leftOfImage", R.drawable.gray_l);
			map.put("rightOfImage", R.drawable.gray_r);
			map.put("sss", 0);
			list.add(map);
		}
			
		return list;
	}

	class CustomListAdapter extends BaseAdapter {

		public Object getItem(int arg0) {
			// TODO Auto-generated method stub
			return arg0;
		}

		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return position;
		}

		public int getCount() {
			// TODO Auto-generated method stub
			return data.size();
//			return 3;
		}

		@TargetApi(11)
		public View getView(int position, View convertView,	android.view.ViewGroup parent) {
			final ViewHolder viewHolder;
			int widgetPosition = 0;
			int flag = 0;
			
			if (convertView == null) {
				viewHolder = new ViewHolder();
//				convertView = mInflater.inflate(R.layout.item_custom, null);
				convertView = getLayoutInflater().inflate(R.layout.item_custom, null);
				viewHolder.leftOfImage = (ImageView) convertView.findViewById(R.id.menu_image_id);
				viewHolder.rightOfImage = (ImageView) convertView.findViewById(R.id.right_image_id);
				viewHolder.menuText = (TextView) convertView.findViewById(R.id.menu_text_id);
				viewHolder.mSpinner = (Spinner) convertView.findViewById(R.id.menu_spinner_id);

				SharedPreferences preferences = getSharedPreferences(PREFERENCES_NAME, Activity.MODE_PRIVATE);
				
				first = preferences.getBoolean(FIRST_RUN, true);
//				System.out.println("i--->itemPosition "+itemPosition);
				if(first){
					flag = 1;
					widgetPosition = preferences.getInt(POS, 1); 
				}
				convertView.setTag(viewHolder);
			} else {
				viewHolder = (ViewHolder) convertView.getTag();
			}
			
			if(flag == 1){
				flag = 0;
			}
			else{
				widgetPosition =(Integer) data.get(position).get("sss");
			}
			
			viewHolder.menuText.setText((String) data.get(position).get("menuText"));
			viewHolder.leftOfImage.setBackgroundResource((Integer) data.get(position).get("leftOfImage"));
			viewHolder.rightOfImage.setBackgroundResource((Integer) data.get(position).get("rightOfImage"));
			
			switch(position){
			case 0:
				viewHolder.mSpinner.setAdapter(adapter);
				viewHolder.mSpinner.setSelection(widgetPosition);
				break;
			case 1:
				viewHolder.mSpinner.setAdapter(adapter);
				viewHolder.mSpinner.setSelection(widgetPosition);
				break;
			case 2:
				viewHolder.mSpinner.setAdapter(adapter1);
				viewHolder.mSpinner.setSelection(widgetPosition);
				break;
			}
			
			return convertView;
		}
		
		protected void onStop() {
	        //获得SharedPreferences对象
	        SharedPreferences MyPreferences = getSharedPreferences(PREFERENCES_NAME, Activity.MODE_PRIVATE);
	        //获得SharedPreferences.Editor
	        SharedPreferences.Editor editor = MyPreferences.edit();
	        //保存组件中的值
	        editor.putInt(POS, 0);
	        editor.putBoolean(FIRST_RUN, false);
	        //提交保存的结果
	        editor.commit();
	    }
		
		public class ViewHolder {
			public TextView menuText;
			public ImageView leftOfImage;
			public Spinner mSpinner;
			public ImageView rightOfImage;
		}
		
	}
}

[搬不搬砖]

把读取设置值的代码放到onCreate或onStart中，而map.put("sss", 0);这里就不应该是0了，而是从sheredpreferences中读出来的上次保存的值，getview中无需进行配置的读取