GC_CONCURRENT求解

时间:2012-07-11 03:13:24

标签: android nfc logcat

我是Android应用程序开发人员的初学者,下面是我的程序,但是,当它运行时,在LogCat中,GC_CONCURRENT消息发生,我明白这是由于我的程序消耗了太多的memery,但是,通过阅读我的代码反复,我仍然不知道为什么我的程序会消耗比我预期的更多的内存,任何人都可以帮我看看并给我一些建议,谢谢!

07-11 10:38:12.258:D / dalvikvm(10060):GC_CONCURRENT释放88K,2%释放12912K / 13063K,暂停2ms + 13ms
07-11 10:38:25.024:D / dalvikvm(10060):GC_CONCURRENT释放84K,2%免费13249K / 13447K,暂停1ms + 3ms
以下是代码:

public class Reader extends Activity {

TextView mText;
NfcAdapter mAdapter;
PendingIntent mPendingIntent;
IntentFilter mFilters[];
String mTechLists[][];

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

}

@Override
public void onStart(){
    super.onStart();
    setContentView(R.layout.activity_reader);

    mText = (TextView) findViewById(R.id.text);

    mAdapter = NfcAdapter.getDefaultAdapter(this);
    mPendingIntent = PendingIntent.getActivity(this, 0,
            new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

    IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
    try{
        ndef.addDataType("text/plain");
    }catch(MalformedMimeTypeException e){
        throw new RuntimeException("fail", e);
    }

    IntentFilter nt = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
    mFilters = new IntentFilter[]{
            ndef, nt
    };

    mTechLists = new String[][]{
            new String[]{
                    Ndef.class.getName()
            }
    };
    Intent intent = getIntent();
    mText.setText(getNdefMessages(intent));
}

public String getNdefMessages(Intent intent){
    NdefMessage[] msgs = null;
    String action = intent.getAction();
    if(NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)||
            NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)){
        Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
        if(rawMsgs != null){
            msgs = new NdefMessage[rawMsgs.length];
            for(int i=0; i<rawMsgs.length; i++){
                msgs[i] = (NdefMessage) rawMsgs[i];
            }
        }else{
            byte[] empty = new byte[]{};
            NdefRecord record = new NdefRecord(NdefRecord.TNF_UNKNOWN, empty, empty, empty);
            NdefMessage msg = new NdefMessage(new NdefRecord[]{record});
            msgs = new NdefMessage[]{msg};
        }

    }
    else {
        finish();
    }
    if(msgs==null)
        return "No Tag discovered!";
    else
        return msgs.toString();
}

@Override
public void onResume(){
    super.onResume();
    if (mAdapter != null)
        mAdapter.enableForegroundDispatch(this, mPendingIntent, mFilters, mTechLists);

}

@Override
public void onPause(){
    super.onPause();
    if (mAdapter != null)
        mAdapter.disableForegroundDispatch(this);
}

@Override
public void onNewIntent(Intent intent){
    Log.i("Foreground dispatch", "Discovered tag with intent:" + intent);
    mText = (TextView) findViewById(R.id.text);
    mText.setText(getNdefMessages(intent));
}

}

1 个答案:

答案 0 :(得分:0)

确保你清除

  NdefMessage msg = new NdefMessage(new NdefRecord[]{record});
        msgs = new NdefMessage[]{msg};

主要的总消息有多少?为什么不做一个Log.debug(“LOG_TAG”,msg.length()) 并找出答案。

你还在模拟器上运行吗?如果是这样的内存设置是什么?

显然,你唯一要消耗内存的是上面的行,所以也许你需要在某些时候释放它。您也可以在eclipse中运行内存分析器并获取更多信息。