访问外部程序的SharedPreference

项目1：创建sharedpreference文件，包名：com.shared.p1

注意1：SharedPreferences shared_f = getSharedPreferences("shared_f_name", Context.MODE_WORLD_READABLE);第二个参数MODE设置为Context.MODE_WORLD_READABLE或Context.MODE_WORLD_WRITEABLE

demo source：

[html]
package com.shared.p1;

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

public class Shared_f1Activity extends Activity implements OnClickListener {

    Button button1, button2, button3;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button1 = (Button) findViewById(R.id.button1);
        button2 = (Button) findViewById(R.id.button2);
        button3 = (Button) findViewById(R.id.button3);

        button1.setOnClickListener(this);
        button2.setOnClickListener(this);
        button3.setOnClickListener(this);
    }

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

        SharedPreferences shared_f = getSharedPreferences("TEST", Context.MODE_WORLD_READABLE);
        SharedPreferences.Editor editor = shared_f.edit();

        switch (v.getId()) {

        case R.id.button1:
            editor.putString("name", getResources().getString(R.string.name));
            editor.commit();
            break;
        case R.id.button2:
            editor.putInt("age", Integer.parseInt(getResources().getString(R.string.age)));
            editor.commit();
            break;
        case R.id.button3:
            String name = shared_f.getString("name", "De易做图t People");
            int age = shared_f.getInt("age", 0);

            Toast.makeText(Shared_f1Activity.this, name+":"+age, Toast.LENGTH_SHORT).show();
            break;
        }
    }
}

布局文件只有3个按钮

项目2：可以访问项目1的sharedPreference文件，package com.shared.p1;

访问项目1的sharedPreference文件，必须获得项目1的context--方法如下：

f1Context = createPackageContext("com.shared.p1", Context.CONTEXT_IGNORE_SECURITY);

demo2 source

[html]
package com.shared.f2;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class Shared_f2Activity extends Activity implements OnClickListener{

    Button button1;
    private Context f1Context;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        button1 = (Button)findViewById(R.id.button1);
        button1.setOnClickListener(this);

        try {
            f1Context = createPackageContext("com.shared.p1", Context.CONTEXT_IGNORE_SECURITY);
        } catch (NameNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch(v.getId())
        {
            case R.id.button1:
                SharedPreferences sharedPreferences = f1Context.getSharedPreferences("TEST", Context.MODE_WORLD_READABLE);
                String name = sharedPreferences.getString("name", "defValue");
                int age = sharedPreferences.getInt("age", 0);

                button1.setText(name+":"+age);

补充：综合编程 , 其他综合 ,