Fatal编程技术网
  • java/
  • Java 共享首选项

Java 共享首选项

java android

Java 共享首选项,java,android,sharedpreferences,android-preferences,Java,Android,Sharedpreferences,Android Preferences,我正在尝试在我的应用程序中使用SharedPrefs，我只想从单独的设置活动中检索电子邮件地址和密码。我已经实施了 package com.overclockerz.webtest; import android.app.Activity; import android.content.SharedPreferences; import android.os.Bundle; import android.widget.EditText; public class SettingScreen

我正在尝试在我的应用程序中使用SharedPrefs，我只想从单独的设置活动中检索电子邮件地址和密码。我已经实施了

package com.overclockerz.webtest;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.EditText;

public class SettingScreen extends Activity {
    static EditText username;
    static EditText password;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.setting_screen);
    username = (EditText) findViewById(R.id.username);
    password = (EditText) findViewById(R.id.password);

    SharedPreferences settings =  
            getSharedPreferences("APP_PREFS", MODE_PRIVATE); 
    SharedPreferences.Editor prefEditor = settings.edit();
    prefEditor.putString("Username", username.getText().toString());
    prefEditor.putString("Password", username.getText().toString());
    prefEditor.commit();        

}

}
我试着用它来恢复 包com.overclockerz.webtest

import org.apache.http.util.EncodingUtils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.CookieManager;
import android.webkit.WebSettings;
import android.webkit.WebSettings.LayoutAlgorithm;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemSelectedListener,
        OnClickListener {
String query = "fldUsername=" + username + "&fldPassword=" + password + "&ut=3";
String username = prefs.getString("Username");
String password = getText(R.id.password).toString();

    @SuppressLint("SetJavaScriptEnabled")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); 
        // then you use
        prefs.getBoolean("keystring", true);
        //there are also methods to put strings,float, longs, ints





        WebView myWebView = (WebView) findViewById(R.id.webview);
        WebSettings webSettings = myWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setUserAgentString("SMUK");
        //myWebView.setInitialScale(100);
        //myWebView.setPadding(0, 0, 0, 0);
        CookieManager.getInstance().setAcceptCookie(true);

        // webSettings.setUseWideViewPort(true);
        webSettings.setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);
        myWebView.setWebViewClient(new WebViewClient());
        myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                EncodingUtils.getBytes(query,"BASE64"));
        Toast.makeText(getApplicationContext(), query, Toast.LENGTH_LONG)
         .show();
        Spinner spinner = (Spinner) findViewById(R.id.menu_spinner);
        // Create an ArrayAdapter using the string array and a default spinner
        // layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.spinner_links,
                android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(this);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        WebView myWebView = (WebView) findViewById(R.id.webview);
        // Check if the key event was the Back button and if there's history
        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
            myWebView.goBack();
            return true;
        }
        // If it wasn't the Back key or there's no web page history, bubble up
        // to the default
        // system behavior (probably exit the activity)
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;

    }

    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        WebView myWebView = (WebView) findViewById(R.id.webview);
        switch (arg2) {
        case 0:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-home");
            break;
        case 1:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-change-pass");
            break;
        case 2:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-add-child");
            break;
        case 3:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-children-list");
            break;
        case 4:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-order");
            break;
        case 5:
            myWebView.clearCache(true);
            Toast.makeText(getApplicationContext(), "Cache Cleared :)",
                    Toast.LENGTH_LONG).show();
            break;
        default:
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-home");
            break;
        }
    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
        // TODO Auto-generated method stub

    }

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

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.settings_menu:
            startActivity(new Intent(this, SettingScreen.class));
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

}

import org.apache.http.util.EncodingUtils；
导入android.annotation.SuppressLint；
导入android.app.Activity；
导入android.content.Intent；
导入android.content.SharedReferences；
导入android.os.Bundle；
导入android.preference.PreferenceManager；
导入android.view.KeyEvent；
导入android.view.Menu；
导入android.view.MenuItem；
导入android.view.view；
导入android.view.view.OnClickListener；
导入android.webkit.CookieManager；
导入android.webkit.WebSettings；
导入android.webkit.WebSettings.LayoutAlgorithm；
导入android.webkit.WebView；
导入android.webkit.WebViewClient；
导入android.widget.AdapterView；
导入android.widget.AdapterView.OnItemSelectedListener；
导入android.widget.ArrayAdapter；
导入android.widget.Spinner；
导入android.widget.Toast；
公共类MainActivity扩展活动实现OnItemSelectedListener，
onclick侦听器{
String query=“fldUsername=“+username+”&fldPassword=“+password+”&ut=3”；
字符串用户名=prefs.getString（“用户名”）；
字符串密码=getText（R.id.password）.toString（）；
@SuppressLint（“SetJavaScriptEnabled”）
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
SharedPreferences=PreferenceManager.getDefaultSharedPreferences（此）；
//然后你用
prefs.getBoolean（“keystring”，true）；
//还有一些方法可以放置字符串、float、long和int
WebView myWebView=（WebView）findviewbyd（R.id.WebView）；
WebSettings WebSettings=myWebView.getSettings（）；
setJavaScriptEnabled（true）；
setUserAgentString（“SMUK”）；
//myWebView.setInitialScale（100）；
//setPadding（0,0,0,0）；
CookieManager.getInstance（）.setAcceptCookie（true）；
//webSettings.setUseWideViewPort（true）；
webSettings.setLayoutAlgorithm（LayoutAlgorithm.SINGLE_列）；
setWebViewClient（新的WebViewClient（））；
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
Toast.makeText（getApplicationContext（），查询，Toast.LENGTH\u LONG）
.show（）；
微调器微调器=（微调器）findViewById（R.id.menu\u微调器）；
//使用字符串数组和默认微调器创建ArrayAdapter
//布局
ArrayAdapter=ArrayAdapter.createFromResource(
这个，R.array.spinner\u链接，
android.R.layout.simple\u微调器（项目）；
//指定显示选项列表时要使用的布局
setDropDownViewResource（android.R.layout.simple\u微调器\u下拉菜单\u项）；
//将适配器应用于微调器
旋转器。设置适配器（适配器）；
spinner.setOnItemSelectedListener（此）；
}
@凌驾
公共布尔onKeyDown（int-keyCode，KeyEvent事件）{
WebView myWebView=（WebView）findviewbyd（R.id.WebView）；
//检查键事件是否为后退按钮，是否有历史记录
if（（keyCode==KeyEvent.keyCode_BACK）&&myWebView.canGoBack（））{
myWebView.goBack（）；
返回true；
}
//如果不是Back键，或者没有网页历史记录，就冒泡吧
//默认
//系统行为（可能退出活动）
返回super.onKeyDown（keyCode，event）；
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//为菜单充气；这会将项目添加到操作栏（如果存在）。
getMenuInflater（）.充气（R.menu.activity\u主菜单）；
返回true；
}
@凌驾
已选择公共视图（适配器视图arg0、视图arg1、内部arg2、，
长arg3）{
WebView myWebView=（WebView）findviewbyd（R.id.WebView）；
开关（arg2）{
案例0：
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
myWebView.loadUrl（“http://test.schoolmilkuk.co.uk/parent-home");
打破
案例1：
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
myWebView
.loadUrl（“http://test.schoolmilkuk.co.uk/parent-change-pass");
打破
案例2：
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
myWebView
.loadUrl（“http://test.schoolmilkuk.co.uk/parent-add-child");
打破
案例3：
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
myWebView
.loadUrl（“http://test.schoolmilkuk.co.uk/parent-children-list");
打破
案例4：
myWebView.postrl（“http://test.schoolmilkuk.co.uk/parents-login",
getBytes（查询，“BASE64”）；
myWebView.loadUrl（“http://test.schoolmilkuk.co.uk/parent-order");
打破
案例5：
myWebView.clearCache（true）；
Toast.makeText（getApplicationContext（），“缓存已清除：）”，
Toast.LENGTH_LONG）.show（）；
打破
违约：
myWebView.loadUrl（“http://test.schoolmilkuk.co.uk/parent-home");
打破
}
}
@凌驾
未选择公共无效（AdapterView arg0）{
//TODO自动生成的方法存根
}
@凌驾
公共void onClick（视图v）{
//

package com.overclockerz.webtest;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.widget.EditText;

public class SettingScreen extends Activity {
    static EditText username;
    static EditText password;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.setting_screen);
        username = (EditText) findViewById(R.id.username);
        password = (EditText) findViewById(R.id.password);

        SharedPreferences settings =  
                getSharedPreferences("APP_PREFS", MODE_PRIVATE); 
        SharedPreferences.Editor prefEditor = settings.edit();
        prefEditor.putString("Username", username.getText().toString());
        prefEditor.putString("Password", username.getText().toString());
        prefEditor.commit();        

    }

}

package com.overclockerz.webtest;

import org.apache.http.util.EncodingUtils;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.CookieManager;
import android.webkit.WebSettings;
import android.webkit.WebSettings.LayoutAlgorithm;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemSelectedListener,
        OnClickListener {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
String username = prefs.getString("Username", "default");
String password = prefs.getString("Password", "default");

String query = "fldUsername=" + username + "&fldPassword=" + password + "&ut=3";
    @SuppressLint("SetJavaScriptEnabled")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        WebView myWebView = (WebView) findViewById(R.id.webview);
        WebSettings webSettings = myWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setUserAgentString("SMUK");
        //myWebView.setInitialScale(100);
        //myWebView.setPadding(0, 0, 0, 0);
        CookieManager.getInstance().setAcceptCookie(true);

        // webSettings.setUseWideViewPort(true);
        webSettings.setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN);
        myWebView.setWebViewClient(new WebViewClient());
        myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                EncodingUtils.getBytes(query,"BASE64"));
        Toast.makeText(getApplicationContext(), query, Toast.LENGTH_LONG)
         .show();
        Spinner spinner = (Spinner) findViewById(R.id.menu_spinner);
        // Create an ArrayAdapter using the string array and a default spinner
        // layout
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.spinner_links,
                android.R.layout.simple_spinner_item);
        // Specify the layout to use when the list of choices appears
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        // Apply the adapter to the spinner
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(this);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        WebView myWebView = (WebView) findViewById(R.id.webview);
        // Check if the key event was the Back button and if there's history
        if ((keyCode == KeyEvent.KEYCODE_BACK) && myWebView.canGoBack()) {
            myWebView.goBack();
            return true;
        }
        // If it wasn't the Back key or there's no web page history, bubble up
        // to the default
        // system behavior (probably exit the activity)
        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;

    }

    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        WebView myWebView = (WebView) findViewById(R.id.webview);
        switch (arg2) {
        case 0:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-home");
            break;
        case 1:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-change-pass");
            break;
        case 2:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-add-child");
            break;
        case 3:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView
                    .loadUrl("http://test.schoolmilkuk.co.uk/parent-children-list");
            break;
        case 4:
            myWebView.postUrl("http://test.schoolmilkuk.co.uk/parents-login",
                    EncodingUtils.getBytes(query,"BASE64"));
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-order");
            break;
        case 5:
            myWebView.clearCache(true);
            Toast.makeText(getApplicationContext(), "Cache Cleared :)",
                    Toast.LENGTH_LONG).show();
            break;
        default:
            myWebView.loadUrl("http://test.schoolmilkuk.co.uk/parent-home");
            break;
        }
    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
        // TODO Auto-generated method stub

    }

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

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.settings_menu:
            startActivity(new Intent(this, SettingScreen.class));
            return true;
        default:
            return super.onOptionsItemSelected(item);
        }
    }

}



SharedPreferences settings =  
            getSharedPreferences("APP_PREFS", MODE_PRIVATE); 



SharedPreferences sp = getApplication().getSharedPreferences("someName", Context.MODE_PRIVATE); 



SharedPrefrences sp = PreferenceManager.getDefaultSharedPreferences(this);