android 不同Activity使用一个SharedPreference

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存储密码的Activity:

public class SharedPreferenceTest extends Activity {    /** Called when the activity is first created. */private ImageView mSkip;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                mSkip = (ImageView)findViewById(R.id.mSkip);                mSkip.setOnClickListener(new OnClickListener(){public void onClick(View v) {// TODO Auto-generated method stubIntent localIntent = new Intent();localIntent.setClass(getApplicationContext(), CopyOfSharedPreferenceTest.class);SharedPreferenceTest.this.startActivity(localIntent);}                });                SharedPreferences.Editor spf =getSharedPreferences("USERPASS",PreferenceActivity.MODE_WORLD_READABLE).edit();          spf.putString("passWord", "hello");          spf.commit();      }}

读取密码的Activity:

public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                SharedPreferences sp = getSharedPreferences("USERPASS",PreferenceActivity.MODE_PRIVATE);          Log.i("xiao", "passwd = " + sp.getString("passWord", "123"));        }