public class Test extends Activity implements OnClickListener {    private EditText etName;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        etName = (EditText) findViewById(R.id.etName);        Button btnLoad = (Button) findViewById(R.id.btnLoad);        Button btnSave = (Button) findViewById(R.id.btnSave);        btnLoad.setOnClickListener(this);        btnSave.setOnClickListener(this);    }    @Override    public void onClick(View v) {        SharedPreferences pre = Test.this.getSharedPreferences("hfgis",                Context.MODE_PRIVATE);        switch (v.getId()) {        case R.id.btnLoad:            etName.setText(pre.getString("account", "加载失败!"));            break;        case R.id.btnSave:            Editor ed = pre.edit();            String str = etName.getText().toString().trim();            ed.putString("account", str);            ed.commit();            break;        default:            break;        }    }}