访问外部程序的SharedPreference

来源：互联网发布：yum pip3 编辑：程序博客网时间：2024/06/04 17:45

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：

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. */@Overridepublic 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 stubSharedPreferences 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", "Defalut 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

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 blocke.printStackTrace();}    }    public void onClick(View v) {// TODO Auto-generated method stubswitch(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);break;}}}