對於數據的存儲有數據庫存儲,有sharePreferences這些方法
數據庫使用的是sqlite,而後者是將存儲的數據存入xml文件中,這個文件在/data/data/包名/shared_prefs中
我現在有一個很小的例子
兩個EditText,在那裏面寫入數據,然後點擊返回鍵,然後在點擊啓動應用,將會看到,在兩個EditText中內容還依然存在
private EditText eText_num,eText_word;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
eText_num=(EditText)findViewById(R.id.editText1);
eText_word=(EditText)findViewById(R.id.editText2);
}
@Override
protected void onResume() {
super.onResume();
SharedPreferences sp=getSharedPreferences("test", MODE_WORLD_READABLE);
String num=sp.getString("num","");
String word=sp.getString("word", "");
eText_num.setText(num);
eText_word.setText(word);
// sp.edit().clear();
// sp.edit().commit();
}
@Override
protected void onPause() {
super.onPause();
SharedPreferences sp=getSharedPreferences("test", MODE_WORLD_WRITEABLE);
Editor editor=sp.edit();
editor.putString("num", eText_num.getText().toString());
editor.putString("word", eText_word.getText().toString());
editor.commit();
}