android应用SharedPreferences_Demo

package com.iteye.dengwho; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class SharedPreferenced_DemoActivity extends Activity { private Button saveBtn; private Button readBtn; private EditText inputEv; private EditText showEv; private SharedPreferencesUtil util; /** * 给控件初始化 */ public void init() { util = new SharedPreferencesUtil(this); saveBtn = (Button) findViewById(R.id.save_btn); readBtn = (Button) findViewById(R.id.read_btn); inputEv = (EditText) findViewById(R.id.input_et); showEv = (EditText) findViewById(R.id.showinfo_et); // 设置监听 setListener(); } /** * 给Button加监听事件 */ public void setListener() { saveBtn.setOnClickListener(new OnClickListener() { public void onClick(View v) { boolean b = util.save("mykey", inputEv.getText().toString()); String msg; if (b) { msg = "保存成功"; } else { msg = "保存失败"; } Toast.makeText(SharedPreferenced_DemoActivity.this, msg, Toast.LENGTH_SHORT).show(); } }); readBtn.setOnClickListener(new OnClickListener() { public void onClick(View v) { System.out.println("read..."); String value = util.read("mykey"); showEv.setText(value); } }); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); init(); } }