数据存储SharePreferences在android开发中的应用实例

package tjuci.edu.dl; //Download by http://www.codefans.net import java.text.SimpleDateFormat; import java.util.Date; import android.app.Activity; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class SharePreferencesSampleActivity extends Activity { SharedPreferences preferences; Button readBtn, writeBtn; Editor editor; EditText edit; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); preferences = getSharedPreferences("myPreference", MODE_PRIVATE); editor = preferences.edit(); writeBtn = (Button)findViewById(R.id.write); readBtn = (Button)findViewById(R.id.read); edit = (EditText)findViewById(R.id.edit); writeBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日"); editor.putString("time", sdf.format(new Date())); editor.putInt("random", (int)(Math.random()*100)); editor.commit(); } }); readBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub String date = preferences.getString("time", null); int radom = preferences.getInt("random", 0); edit.setText(date + " " + radom ); Toast.makeText(SharePreferencesSampleActivity.this, "时间为:" + date + " 随机数:" + radom , Toast.LENGTH_SHORT).show(); } }); } }