Question

我想在SecondActivity中重用MainActivity中的共享首选项获取。客户应该有一个URL并且它被记录在共享首选项中，我希望我们可以重复使用存储在我的SecondActivity中的这个将它放在webview中（例如http：// MySharedPreferenceURL / mypage＆lt; - mypage是静态的，并且是动态的MySharedPreferenceURL

我的MainActivity代码是：

import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;

public class Settings extends Activity implements OnClickListener {

    CheckBox checkBox;
    EditText editText;
    Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.settings);

        checkBox = (CheckBox) findViewById(R.id.checkBox1);
        editText = (EditText) findViewById(R.id.editText1);
        button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(this);
        loadSavedPreferences();
    }

    private void loadSavedPreferences() {
        SharedPreferences sharedPreferences = getSharedPreferences("Some name", 0);
        Editor editor = sharedPreferences.edit();

        boolean checkBoxValue = sharedPreferences.getBoolean("CheckBox_Value", false);
        String name = sharedPreferences.getString("storedName", "YourName");
        if (checkBoxValue) {
            checkBox.setChecked(true);
        } else {
            checkBox.setChecked(false);
        }

        editText.setText(name);
    }

    private void savePreferences(String key, boolean value) {
        SharedPreferences sharedPreferences = getSharedPreferences("Some name", 0);
        Editor editor = sharedPreferences.edit();
        editor.putBoolean(key, value);
        editor.commit();
    }

    private void savePreferences(String key, String value) {
        SharedPreferences sharedPreferences = PreferenceManager
                .getDefaultSharedPreferences(this);
        Editor editor = sharedPreferences.edit();
        editor.putString(key, value);
        editor.commit();
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        savePreferences("CheckBox_Value", checkBox.isChecked());
        if (checkBox.isChecked())
            savePreferences("storedName", editText.getText().toString());

        finish();
    }

}

编辑：

import android.app.Activity;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;

public class Settings extends Activity implements OnClickListener {

    CheckBox checkBox;
    EditText editText;
    Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.settings);

        checkBox = (CheckBox) findViewById(R.id.checkBox1);
        editText = (EditText) findViewById(R.id.editText1);
        button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(this);
        loadSavedPreferences();
    }

    private void loadSavedPreferences() {
        SharedPreferences sharedPreferences = PreferenceManager
                .getDefaultSharedPreferences(this);
        boolean checkBoxValue = sharedPreferences.getBoolean("CheckBox_Value", false);
        String name = sharedPreferences.getString("storedName", "YourName");
        if (checkBoxValue) {
            checkBox.setChecked(true);
        } else {
            checkBox.setChecked(false);
        }

        editText.setText(name);
    }

    private void savePreferences(String key, boolean value) {
        SharedPreferences sharedPreferences = PreferenceManager
                .getDefaultSharedPreferences(this);
        Editor editor = sharedPreferences.edit();
        editor.putBoolean(key, value);
        editor.commit();
    }

    private void savePreferences(String key, String value) {
        SharedPreferences sharedPreferences = PreferenceManager
                .getDefaultSharedPreferences(this);
        Editor editor = sharedPreferences.edit();
        editor.putString(key, value);
        editor.commit();
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        savePreferences("CheckBox_Value", checkBox.isChecked());
        if (checkBox.isChecked())
            savePreferences("storedName", editText.getText().toString());

        finish();
    }

}

而且，我不知道如何在我的SecondActivty中展示，你能帮我解释一下吗

Answer 1

不要使用getDefaultSharedPreferences(this)，为什么不尝试

SharedPreference sp = getSharedPreferences("Some name", 0);
Editor editor = sp.edit();´
(...)

"some name"将是存储数据的文件的名称。（如果不存在，它将自动创建）

在其他活动中，您只需致电SharedPreference，指向同名。

<强>示例：

一项活动：

    public class Activity1 extends Activity
    {
       (...)
       SharedPreferences sp = getSharedPreferences("my_profile", 0);
       Editor editor = sp.edit();
       editor.putString("Name", "PedroHawk");
       editor.putString("Hobby", "making samples on stackoverflow");
       editor.commit();
       (...)
    }

其他活动：

    public class Activity2 extends Activity
    {
       (...)
       SharedPreferences sp = getSharedPreferences("my_profile", 0);
       String myName = sp.getString("Name", "empty");
       String myHobby = sp.getString("Hobby", "empty");
       (...)
    }

在第二个活动中获取共享首选项

1 个答案: