android 获取内存分配信息

怼烎@ 2024-04-17 06:19 78阅读 0赞

ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            ActivityManager.MemoryInfo mi = new ActivityManager.MemoryInfo();
            //设备内存
            manager.getMemoryInfo(mi);
            String totalMem = Formatter.formatFileSize(context, mi.totalMem);
            Log.d("Alex", "设备的运行总内存 totalMem: " + totalMem);
            String availMem = Formatter.formatFileSize(context, mi.availMem);
            Log.d("Alex", "设备剩余运行内存 availMem: " + availMem);
            int memory = manager.getMemoryClass();
            Log.d("Alex", "非大内存模式，app可分配最大内存 memory: " + memory);
            int largeMemory = manager.getLargeMemoryClass();
            Log.d("Alex", "大内存模式，app可分配最大内存 largeMemory: " + largeMemory);
            //运行时最大分配内存
            float maxMemory = (float) (Runtime.getRuntime().maxMemory() * 1.0 / (1024 * 1024));
            Log.d("Alex", "运行时app当前可分配最大内存 maxMemory: " + maxMemory);
            //当前分配的总内存
            float totalMemory = (float) (Runtime.getRuntime().totalMemory() * 1.0 / (1024 * 1024));
            Log.d("Alex", "运行时app当前分配内存 totalMemory: " + totalMemory);
            //当前分配使用剩余内存
            float freeMemory = (float) (Runtime.getRuntime().freeMemory() * 1.0 / (1024 * 1024));
            Log.d("Alex", "运行时app当前分配剩余内存 freeMemory: " + freeMemory);

android:largeHeap true:开启大内存模式； false:关闭大内存模式

运行结果如图：

![fe523113e0e4473989618c5fef54744e.png][]