Thanks Egon. Another question , when I run game , it always output this log:
12-16 21:43:20.124: D/dalvikvm(2414): GC_CONCURRENT freed 1952K, 36% free 9981K/15367K, external 1326K/2221K, paused 4ms+4ms
12-16 21:43:26.540: D/dalvikvm(2414): GC_CONCURRENT freed 1956K, 36% free 9969K/15367K, external 1326K/2221K, paused 6ms+3ms
12-16 21:43:33.237: D/dalvikvm(2414): GC_CONCURRENT freed 1945K, 36% free 9978K/15367K, external 1326K/2221K, paused 4ms+3ms
12-16 21:43:40.153: D/dalvikvm(2414): GC_CONCURRENT freed 1945K, 36% free 9987K/15367K, external 1326K/2221K, paused 6ms+5ms
12-16 21:43:47.040: D/dalvikvm(2414): GC_CONCURRENT freed 1963K, 36% free 9978K/15367K, external 1326K/2221K, paused 4ms+3ms
12-16 21:43:53.937: D/dalvikvm(2414): GC_CONCURRENT freed 1954K, 36% free 9978K/15367K, external 1326K/2221K, paused 4ms+3ms
12-16 21:44:00.814: D/dalvikvm(2414): GC_CONCURRENT freed 1954K, 36% free 9978K/15367K, external 1326K/2221K, paused 3ms+3ms
12-16 21:44:07.850: D/dalvikvm(2414): GC_CONCURRENT freed 1954K, 36% free 9975K/15367K, external 1326K/2221K, paused 7ms+3ms
What's this ? and How to resolve this ? Thanks !