android_preference

package com.example.myfirstapp;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

@SuppressLint("CommitPrefEdits")
public class SharedPreferenceActivity extends Activity {
    private static final String defaultIpaddress="192.168.1.1";
    private static final String defaultPort="9902";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_preference);
    }
    
    /**
     * 设置
     * @param view
     * @throws Exception
     */
    public void saveBtnClicked(View view)throws Exception{
        String ip=((EditText)findViewById(R.id.ip)).getText().toString();
        String port=((EditText)findViewById(R.id.port)).getText().toString();
        //getPreferences(mode) 只使用一个参数设置文件
        SharedPreferences.Editor editor=getSharedPreferences("preference", Context.MODE_PRIVATE).edit();
        editor.putString("ip",ip);
        editor.putString("port", port);
        editor.commit();
        Toast.makeText(view.getContext(),R.string.file_operator_success,Toast.LENGTH_SHORT).show();
    }
    
    /**
     * 恢复默认
     * @param view
     * @throws Exception
     */
    public void backBtnClicked(View view)throws Exception{
        SharedPreferences settings=getSharedPreferences("default", Context.MODE_PRIVATE);
        SharedPreferences.Editor editor=settings.edit();
        editor.putString("ip", defaultIpaddress);
        editor.putString("port", defaultPort);
        editor.commit();
        
        String ip=settings.getString("ip", "");
        String port=settings.getString("port", "");
        
        SharedPreferences customSettings=getSharedPreferences("preference", Context.MODE_PRIVATE);
        SharedPreferences.Editor customEditor=customSettings.edit();        
        customEditor.putString("ip",ip);
        customEditor.putString("port", port);
        customEditor.commit();
        
        ((EditText)findViewById(R.id.ip)).setText(customSettings.getString("ip", ""));
        ((EditText)findViewById(R.id.port)).setText(customSettings.getString("port", ""));
    }
}