Android如何減少lowmemory的發生機率[小內存]

 內存不足時常發生卡頓，甚至是死機重啓問題，需要儘量減少內存不足情況的發生

1. 減少後臺進程的數量

 修改 frameworks\base\services\core\java\com\android\server\am\ProcessList.java
 static final int MAX_CACHED_APPS = 32; // 改爲 static final int MAX_CACHED_APPS = 8;

 或者：

 /frameworks/base/services/core/java/com/android/server/am/ActivityManagerConstants.java

 private static final int DEFAULT_MAX_CACHED_PROCESSES = 32;

2. 調整Low Memory Killer minifree門限值，frameworks\base\services\core\java\com\android\server\am\ProcessList.java中，
調整下面的mOomMinFreeHigh裏面的後三項 ，分別增大1.1倍、1.2倍、1.5倍。
 // These are the high-end OOM level limits. This is appropriate for a
 // 1280x800 or larger screen with around 1GB RAM. Values are in KB.
 private final int[] mOomMinFreeHigh = new int[] {
       73728, 92160, 110592,
       129024, 147456, 184320
 };