android - 后台粘性并发标记清除 GC 已释放

Question

我有一个应用程序，如果有任何新数据，每 10 秒检查一次数据库，如果有任何数据，它将获取它并停止检查数据库。

我已经实现了一个文本观察器来检查文本框是否为空。如果是，它将检查数据库，如果包含任何文本，它将停止。

这是我的代码:

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    txtBoxUser.addTextChangedListener(checkUserRent);

    getData();
}


//TEXTWATCHER FOR GETTING PERSON WHO RENTED BOX
private final TextWatcher checkUserRent = new TextWatcher() {
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }
    public void afterTextChanged(Editable s) {
        if (s.length() == 0) {
            check();
        } else {
            Toast.makeText(MainActivity.this, "STOP",
                    Toast.LENGTH_LONG).show();
        }
    }
};


public void start(View view)
{
    getData();
}

public void cancel(View view)
{
    txtBoxUser.setText("");
    txtBoxPasscode.setText("");
}

private void getData(){

  final String id = txtBoxName.getText().toString().trim();

    class GetEmployee extends AsyncTask<Void,Void,String>{
        ProgressDialog loading;
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
       //     loading = ProgressDialog.show(MainActivity.this,"Fetching...","Wait...",false,false);
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
      //      loading.dismiss();
            showEmployee(s);
        }

        @Override
        protected String doInBackground(Void... params) {
            RequestHandler rh = new RequestHandler();
            String s = rh.sendGetRequestParam(DATA_URL,id);
            return s;
        }
    }
    GetEmployee ge = new GetEmployee();
    ge.execute();
}

private void showEmployee(String json){
    try {
        JSONObject jsonObject = new JSONObject(json);
        JSONArray result = jsonObject.getJSONArray(JSON_ARRAY);
        JSONObject c = result.getJSONObject(0);
        String name = c.getString(GET_BOXUSER);
        String desg = c.getString(GET_PASSCODE);

        txtBoxUser.setText(name);
        txtBoxPasscode.setText(desg);

    } catch (JSONException e) {
        e.printStackTrace();
    }
}


private void check()
{
    getData();

}

但是我在等待数据时在 logcat 中得到了这个。我只是想知道它是否可以或是否安全？

I/art: Background sticky concurrent mark sweep GC freed 5614(449KB) AllocSpace objects, 18(288KB) LOS objects, 33% free, 1691KB/2MB, paused 5.354ms total 10.731ms
I/art: Background sticky concurrent mark sweep GC freed 7039(557KB) AllocSpace objects, 22(352KB) LOS objects, 39% free, 1561KB/2MB, paused 10.554ms total 15.931ms 
I/art: Background partial concurrent mark sweep GC freed 7279(564KB) AllocSpace objects, 21(336KB) LOS objects, 40% free, 1504KB/2MB, paused 5.721ms total 15.823ms
I/art: WaitForGcToComplete blocked for 5.375ms for cause HeapTrim
I/art: Background partial concurrent mark sweep GC freed 7650(591KB) AllocSpace objects, 22(352KB) LOS objects, 40% free, 1505KB/2MB, paused 5.511ms total 21.465ms

Answer 1

这很好。这意味着您正在使用内存，然后它被 GC 释放。它唯一的问题是内存不足，或者由于垃圾收集而导致性能问题。但这不是您需要竞相修复的任何问题。