共享首选项值未在Android中打印

Question

I want to save server IP and path in my android form in Shared preference and later on want to retrieve those values by another java prog. to connect to server and download files. etc.

So, first i tried to print the sharedpreference values in New.java , where the values are stored in Setting.java , the 1st java file is calling the second and "Welcome" is getting printed, but the saved values in shared preferences in not getting printed.

Following are my files:

Setting.java

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class Setting extends Activity {

    protected static final Toast NULL = null;
    Button btn1;

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.setting_page);


        btn1 = (Button) findViewById(R.id.btn1);
        final EditText  ip  = (EditText) findViewById(R.id.ip);
        final EditText  path  = (EditText)findViewById(R.id.path);





        btn1.setOnClickListener(new OnClickListener() {


            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub


                SharedPreferences settings = getSharedPreferences("IP_PATH",0);
                SharedPreferences.Editor editor = settings.edit();
                editor.putBoolean("flag",true);
                editor.putString("IP",ip.getText().toString());
                editor.putString("PATH",path.getText().toString());
                editor.commit();






                Intent i = new Intent(Setting.this,New.class);
                //intent.putExtra("username",getIntent().getExtras().getString("username").toString());
                startActivity(i);

            }

        });

    }

}

New.java

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class New extends Activity {


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.data);
       //System.out.println("Welcome to the home page !!");

        TextView tv = (TextView) findViewById(R.id.TextView01);
        tv.setText("Welcome");

        SharedPreferences prfs = getSharedPreferences("IP_PATH", 0);
        String s = prfs.getString("IP", "");

        Toast.makeText(New.this, s , Toast.LENGTH_LONG).show();
    }


}

Errors:

06-16 00:06:25.900: I/Adreno200-EGL(23644): Local Patches: NONE
06-16 00:06:25.900: I/Adreno200-EGL(23644): Reconstruct Branch: NOTHING
06-16 00:06:37.740: D/-heap(23644): GC_CONCURRENT freed 152K, 4% free 8035K/8327K, paused 13ms+2ms, total 49ms
06-16 00:17:27.690: E/Trace(24124): error opening trace file: No such file or directory (2)
06-16 00:17:28.030: I/Adreno200-EGL(24124): <qeglDrvAPI_eglInitialize:299>: EGL 1.4 QUALCOMM build: AU_LINUX_ANDROID_JB_REL_RB1.04.01.01.06.043_msm7627a_JB_REL_RB1.2_Merge_release_AU (Merge)
06-16 00:17:28.030: I/Adreno200-EGL(24124): Build Date: 01/29/13 Tue
06-16 00:17:28.030: I/Adreno200-EGL(24124): Local Branch: 
06-16 00:17:28.030: I/Adreno200-EGL(24124): Remote Branch: m/jb_rel_rb1.2
06-16 00:17:28.030: I/Adreno200-EGL(24124): Local Patches: NONE
06-16 00:17:28.030: I/Adreno200-EGL(24124): Reconstruct Branch: NOTHING
06-16 00:17:36.120: D/-heap(24124): GC_CONCURRENT freed 174K, 5% free 7985K/8327K, paused 17ms+2ms, total 40ms

reference

Answer 1

获取共享首选项时，将MODE_WORLD_READABLE作为第二个参数传递。

SharedPreferences settings = getSharedPreferences("IP_PATH",MODE_WORLD_READABLE);