Android Sharedpreferences 儲存設定

一些app都會有設定功能，利用Sharedpreferences可以將設定好的參數儲存起來
1.activity_main.xml

2.MainActivity.java

 private CheckBox checkBox1;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  output = (TextView) findViewById(R.id.output);
  checkBox1 = (CheckBox) findViewById(R.id.checkBox1);
  checkBox1.setChecked(getFromSP("cb1")); // checkBox讀取設定
  checkBox_service.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() { //監聽checkBox改變狀態
   @Override
   public void onCheckedChanged(CompoundButton buttonView,
     boolean isChecked) {
    // TODO Auto-generated method stub
    if (checkBox1.isChecked()) { //如果有打勾(true)
     saveInSp("cb1", isChecked); // 儲存打勾設定
     output.setText("啟動");
    } else { //如果沒打勾(false)
     saveInSp("cb1", isChecked);// 儲存沒打勾設定
     output.setText("關閉");
    }
   }

  });
 }
 /* 讀取設定 */
 private boolean getFromSP(String key) {
  SharedPreferences preferences = getApplicationContext()
    .getSharedPreferences("PROJECT_NAME",
      android.content.Context.MODE_PRIVATE); //PROJECT_NAME專案名,android.content.Context.MODE_PRIVATE默認設定
  return preferences.getBoolean(key, false); //沒有key值時，回傳false
 }
 /* 儲存設定 */
 private void saveInSp(String key, boolean value) {
  SharedPreferences preferences = getApplicationContext()
    .getSharedPreferences("PROJECT_NAME",
      android.content.Context.MODE_PRIVATE); //PROJECT_NAME專案名,android.content.Context.MODE_PRIVATE默認設定
  SharedPreferences.Editor editor = preferences.edit(); //建立SharedPreferences編輯器
  editor.putBoolean(key, value); //利用編輯器加入屬性putBoolean(String key, boolean value),putFloat(String key, float value),putInt(String key, int value),putLong(String key, long value),putString(String key, String value)
  editor.commit(); //將數據儲存
 }

參考來源:http://stackoverflow.com/questions/10016752/saving-checkbox-states