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POSimple blank activity cause memory leak. Why?
 

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  1. POSimple blank activity cause memory leak. Why?
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    <p>Just for the test I've created two activities</p> <pre><code>public class TestActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setDisplayShowHomeEnabled(true); setContentView(R.layout.activity_bpm); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: Intent intent = new Intent(TestActivity.this, TestActivity2.class); startActivity(intent); break; default: return super.onOptionsItemSelected(item); } return true; } } </code></pre> <p>and</p> <pre><code>public class TestActivity2 extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setDisplayShowHomeEnabled(true); setContentView(R.layout.activity_about); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: Intent intent = new Intent(TestActivity2.this, TestActivity.class); startActivity(intent); break; default: return super.onOptionsItemSelected(item); } return true; } } </code></pre> <p>Then I just pressing on the home button frequently to switch between them and that what I see in the LogCat:</p> <pre><code>05-02 15:55:36.211: D/dalvikvm(15615): GC_CONCURRENT freed 116K, 4% free 7548K/7812K, paused 4ms+2ms, total 20ms 05-02 15:55:40.301: D/dalvikvm(15615): GC_CONCURRENT freed 79K, 3% free 7853K/8080K, paused 2ms+2ms, total 24ms 05-02 15:55:43.611: D/dalvikvm(15615): GC_CONCURRENT freed 97K, 3% free 8189K/8432K, paused 1ms+10ms, total 53ms 05-02 15:55:50.171: D/dalvikvm(15615): GC_CONCURRENT freed 93K, 3% free 8492K/8732K, paused 5ms+9ms, total 44ms 05-02 15:55:53.021: D/dalvikvm(15615): GC_CONCURRENT freed 93K, 3% free 8788K/9028K, paused 2ms+5ms, total 35ms 05-02 15:55:54.861: D/dalvikvm(15615): GC_CONCURRENT freed 96K, 3% free 9116K/9360K, paused 2ms+9ms, total 48ms 05-02 15:55:57.061: D/dalvikvm(15615): GC_CONCURRENT freed 116K, 3% free 9504K/9768K, paused 2ms+7ms, total 45ms </code></pre> <p>You can see that used memory grows up. So I have a question: How is this even possible??? Please, explain if anyone have a clue.</p>
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    1. USSergey Dmitriev
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      1. POSimple blank activity cause memory leak. Why?
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      1. VTUpMod
    2. VO
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      1. POSimple blank activity cause memory leak. Why?
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      1. VTUpMod
    1. COStay calm! its not a memory leak :)
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      1. USwaqaslam
    2. CO"Share state between activities": The right way depends on whether it'll be for the following activities or for the whole app. In the first case, if it's not much data, passing `Intent` extras makes sense (also because of the recosntruction mechanisms Android uses), in the latter (as with a secure server connection) you'll subclass `Application` and maintain references there, becuase that object lives as long as the hosting process. But I'm not sure you really want this endless stack of A,B,A etc in a real product. At least not without additional flags telling Android what you mean by it.
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      1. POSimple blank activity cause memory leak. Why?
      1. USclass stacker
    3. COJust for example: I store a number in SharedPrefs, I can change it in my activity and I assume to see changes in all activities in history. The right way to reach that will be to update UI every onResume, am I right?
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      1. POSimple blank activity cause memory leak. Why?
      1. USSergey Dmitriev
 

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