android.app.ActivityManager#isLowRamDevice ( )源码实例Demo

@TargetApi(VERSION_CODES.KITKAT)
public static boolean isLowMemory(Context context) {
  ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

  return (VERSION.SDK_INT >= VERSION_CODES.KITKAT && activityManager.isLowRamDevice()) ||
         activityManager.getLargeMemoryClass() <= 64;
}
 

private static @NonNull String getMemoryClass(Context context) {
  ActivityManager activityManager = ServiceUtil.getActivityManager(context);
  String          lowMem          = "";

  if (activityManager.isLowRamDevice()) {
    lowMem = ", low-mem device";
  }

  return activityManager.getMemoryClass() + lowMem;
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
private static boolean isLowMemoryDevice(ActivityManager activityManager) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        return activityManager.isLowRamDevice();
    } else {
        return Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB;
    }
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
   public static boolean isLowRamDevice(Context context) {
   	if(Utils.hasKitKat()){
   		final ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
   		return am.isLowRamDevice();
   	}
   	return !hasMoreHeap();
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
   public static boolean isLowRamDevice(Context context) {
   	if(Utils.hasKitKat()){
   		final ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
   		return am.isLowRamDevice();
   	}
   	return !hasMoreHeap();
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
   public static boolean isLowRamDevice(Context context) {
   	if(Utils.hasKitKat()){
   		final ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
   		return am.isLowRamDevice();
   	}
   	return !hasMoreHeap();
}
 

@TargetApi(VERSION_CODES.KITKAT)
public static String getMemoryClass(Context context) {
  ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  String          lowMem          = "";

  if (VERSION.SDK_INT >= VERSION_CODES.KITKAT && activityManager.isLowRamDevice()) {
    lowMem = ", low-mem device";
  }
  return activityManager.getMemoryClass() + lowMem;
}
 

@TargetApi(VERSION_CODES.KITKAT)
public static boolean isLowMemory(Context context) {
  ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

  return (VERSION.SDK_INT >= VERSION_CODES.KITKAT && activityManager.isLowRamDevice()) ||
         activityManager.getLargeMemoryClass() <= 64;
}
 

@TargetApi(VERSION_CODES.KITKAT)
public static boolean isLowMemory(Context context) {
  ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

  return (VERSION.SDK_INT >= VERSION_CODES.KITKAT && activityManager.isLowRamDevice()) ||
         activityManager.getMemoryClass() <= 64;
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
public boolean isLowRam() {
	if (C.API_KITKAT) {
		ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
		return activityManager != null && activityManager.isLowRamDevice();
	} else {
		return Runtime.getRuntime().maxMemory() <= 64 * 1024 * 1024;
	}
}
 

@TargetApi(VERSION_CODES.KITKAT)
public static String getMemoryClass(Context context) {
  ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
  String          lowMem          = "";

  if (VERSION.SDK_INT >= VERSION_CODES.KITKAT && activityManager.isLowRamDevice()) {
    lowMem = ", low-mem device";
  }
  return activityManager.getMemoryClass() + lowMem;
}
 

public static boolean isLowMemory(Context context) {
    ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);

    return (activityManager.isLowRamDevice()) || activityManager.getLargeMemoryClass() <= 64;
}
 

private static boolean isLowRamDevice(@NonNull ActivityManager activityManager) {
    if (Build.VERSION.SDK_INT >= 19) {
        return activityManager.isLowRamDevice();
    }
    return false;
}
 

public static boolean isLowRamDevice(ActivityManager am) {
    return am.isLowRamDevice();
}
 

@TargetApi(Build.VERSION_CODES.KITKAT)
private static boolean isLowMemoryDevice(@Nullable ActivityManager activityManager) {
    final int sdkInt = Build.VERSION.SDK_INT;
    return activityManager == null || sdkInt >= Build.VERSION_CODES.KITKAT && activityManager.isLowRamDevice();
}