用sharepreference保存输入框中的内容

package com.cia.settings;
import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.KeyEvent;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity
{
 private EditText et_server,et_backup,et_upgrade;
 private TextView  tv_show_version,tv_show_mac;
 private SharedPreferences sharedPrefrences;
 private Editor editor;
  // 要存储的文件名
  private static final String FILENAME = "filename";

 @Override
 public void onCreate(Bundle savedInstanceState)
 {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  et_server = (EditText) findViewById(R.id.edit_server);
  et_backup = (EditText) findViewById(R.id.edit_backup);
  et_upgrade = (EditText) findViewById(R.id.edit_upgrade);
  
    sharedPrefrences = this.getSharedPreferences(FILENAME, MODE_WORLD_READABLE);
  
   
    String r_server = sharedPrefrences.getString("server", "");
    String r_backup = sharedPrefrences.getString("backup", "");
    String r_upgrade= sharedPrefrences.getString("upgrade", "");
    et_server.setText(r_server);
    et_backup.setText(r_backup);
    et_upgrade.setText(r_upgrade);
   
   
 }
 
 //在点击退出时保存数据
 @Override
 public boolean onKeyDown(int keyCode, KeyEvent event)
 {
  // 得到编辑器对象
   editor = getSharedPreferences(FILENAME, MODE_WORLD_WRITEABLE).edit();
  if(keyCode==KeyEvent.KEYCODE_BACK)
  {
   String server=et_server.getText().toString();
   String backup=et_backup.getText().toString();
   String upgrade=et_upgrade.getText().toString();
   editor.putString("server", server);
   editor.putString("backup", backup);
   editor.putString("upgrade", upgrade);
   editor.commit();
  }
  return super.onKeyDown(keyCode, event);
 }

 

 

 

  第二种方法， if class extends frame.

package com.android.settings;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.app.Fragment;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemProperties;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class JumpTvSettings extends Fragment implements OnClickListener
{
    private EditText et_server, et_backup, et_upgrade;
    private TextView tv_show_version, tv_show_mac;
    private Editor editor;
    private Button btn;
   
    private static final String TAG = "JumpTvSettings_mac";
    private static final String LOG_TAG="jumTv_Settings_version";
   
     private SharedPreferences mPrefs;
    // 要存储的文件名
    private static final String FILENAME = "filename_jumpTv";
   
    private static final  String CONFIG_PATH = "/sys/class/efuse/mac";
    private static final String FILENAME_PROC_VERSION = "/proc/version";
   
    private static final String KEY_FIRMWARE_VERSION = "firmware_version";
   
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState)
    {
        View v=inflater.inflate(R.layout.jump_page, container, false);

        et_server = (EditText)v.findViewById(R.id.edit_server);
        et_backup = (EditText)v.findViewById(R.id.edit_backup);
        et_upgrade = (EditText)v.findViewById(R.id.edit_upgrade);
        btn=(Button)v.findViewById(R.id.btn_submit);
        btn.setOnClickListener(this);

        et_upgrade = (EditText)v.findViewById(R.id.edit_upgrade);

                                                tv_show_version = (TextView)v.findViewById(R.id.txt_show_version);
         tv_show_mac = (TextView)v.findViewById(R.id.txt_show_mac);
        mPrefs =  getActivity().getSharedPreferences(FILENAME, Context.MODE_WORLD_READABLE);
          String r_server = mPrefs.getString("server", "");
          String r_backup = mPrefs.getString("backup", "");
          String r_upgrade= mPrefs.getString("upgrade", "");
          et_server.setText(r_server);
          et_backup.setText(r_backup);
          et_upgrade.setText(r_upgrade);
            tv_show_mac.setText(new StringBuilder(this.getEthMacfromEfuse()).toString());
            tv_show_version.setText(Build.VERSION.RELEASE);
            tv_show_version.setEnabled(true);
         return v;
    }

    

     /**
         * Reads a line from the specified file.
         * @param filename the file to read from
         * @return the first line, if any.
         * @throws IOException if the file couldn't be read
         */
        private String readLine(String filename) throws IOException {
            BufferedReader reader = new BufferedReader(new FileReader(filename), 256);
            try {
                return reader.readLine();
            } finally {
                reader.close();
            }
        }

    private String getFormattedKernelVersion() {
        String procVersionStr;
        try {
            procVersionStr = readLine(FILENAME_PROC_VERSION);

            final String PROC_VERSION_REGEX =
                "\\w+\\s+" + /* ignore: Linux */
                "\\w+\\s+" + /* ignore: version */
                "([^\\s]+)\\s+" + /* group 1: 2.6.22-omap1 */
                "错误！超链接引用无效。" + /* group 2: ([e-mail]) */
                "错误！超链接引用无效。" + /* ignore: (gcc ..) */
                "([^\\s]+)\\s+" + /* group 3: #26 */
                "(?:PREEMPT\\s+)?" + /* ignore: PREEMPT (optional) */
                "(.+)"; /* group 4: date */

            Pattern p = Pattern.compile(PROC_VERSION_REGEX);
            Matcher m = p.matcher(procVersionStr);

            if (!m.matches()) {
                Log.e(LOG_TAG, "Regex did not match on /proc/version: " + procVersionStr);
                return "Unavailable";
            } else if (m.groupCount() < 4) {
                Log.e(LOG_TAG, "Regex match on /proc/version only returned " + m.groupCount()
                        + " groups");
                return "Unavailable";
            } else {
                return (new StringBuilder(m.group(1)).append("\n").append(
                        m.group(2)).append(" ").append(m.group(3)).append("\n")
                        .append(m.group(4))).toString();
            }
        } catch (IOException e) {
            Log.e(LOG_TAG,
                "IO Exception when getting kernel version for Device Info screen",
                e);
            return "Unavailable";
        }
    }

    // 获取mac地址
    private String getEthMacfromEfuse()
    {
        String sn = null;
        try
        {
            BufferedReader reader = new BufferedReader(new FileReader(CONFIG_PATH), 12);
            try
            {
                sn = reader.readLine();
            }finally
            {
                reader.close();
            }
            Log.d(TAG, "/sys/class/efuse/mac: " + sn);
            if (sn.equals("00:00:00:00:00:00"))
                return SystemProperties.get("ubootenv.var.ethaddr",getString(R.string.status_unavailable));
            else
                return sn;
        } catch (IOException e)
        {
            Log.e(TAG,"IO Exception when getting serial number for Device Info screen",e);
            // return "null";
            return SystemProperties.get("ubootenv.var.ethaddr",getString(R.string.status_unavailable));
        }
    }
   
   
   
    @Override
  public void onPause()
  {
      //界面失去控制权时保存数据
      editor =getActivity().getSharedPreferences(FILENAME, Context.MODE_WORLD_WRITEABLE).edit();
      String server = et_server.getText().toString();
      String backup = et_backup.getText().toString();
      String upgrade = et_upgrade.getText().toString();
      editor.putString("server", server);
      editor.putString("backup", backup);
      editor.putString("upgrade", upgrade);
      editor.commit();
          super.onPause();
  }
   
    public void onSaveInstanceState(Bundle outState) {
        //界面销毁之前保存数据
        super.onSaveInstanceState(outState);
        outState.putString("server", et_server.getText().toString());
        outState.putString("server", et_backup.getText().toString());
        outState.putString("server", et_upgrade.getText().toString());
    }
}

 

 /*

 * 取文件中的值

 */

   public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Context context = null;
        try {
            context = createPackageContext("com.android.settings", Context.CONTEXT_IGNORE_SECURITY);
        } catch (NameNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        SharedPreferences settings = context.getSharedPreferences("filename_jumpTv",
                Context.MODE_WORLD_READABLE);
        String server = settings.getString("server", " ");
        String backup = settings.getString("backup", " ");
        Log.d("SharedPreferences", "server:" + server + ", backup:" + backup);
        Log.d("SharedPreferences", "获取数据成功");
        Uri server_uri = Uri.parse(server);
        Uri backup_uri = Uri.parse(backup);
        Intent intent1 = new Intent(Intent.ACTION_VIEW, server_uri);
        Intent intent2 = new Intent(Intent.ACTION_VIEW, backup_uri);
        startActivity(intent1);
        startActivity(intent2);
    }